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Afromontane Forest Diversity and the Role of Grassland-Forest Transition in Tree Species DistributionAbiem, IverenArellano, GabrielKenfack, DavidChapman, Hazel2020DOI: info:10.3390/d12010030Diversityv. 12No. 11191–191424-2818
Abiem, Iveren, Arellano, Gabriel, Kenfack, David, and Chapman, Hazel. 2020. "Afromontane Forest Diversity and the Role of Grassland-Forest Transition in Tree Species Distribution." Diversity 12 (1):1–19. https://doi.org/10.3390/d12010030
ID: 154309
Type: article
Authors: Abiem, Iveren; Arellano, Gabriel; Kenfack, David; Chapman, Hazel
Keywords: STRI
Abstract: Local factors can play an important role in defining tree species distributions in species rich tropical forests. To what extent the same applies to relatively small, species poor West African montane forests is unknown. Here, forests survive in a grassland matrix and fire has played a key role in their spatial and temporal dynamics since the Miocene. To what extent these dynamics influence local species distributions, as compared with other environmental variables such as altitude and moisture remain unknown. Here, we use data from the 20.28 ha montane forest plot in Ngel Nyaki Forest Reserve, South-East Nigeria to explore these questions. The plot features a gradient from grassland to core forest, with significant edges. Within the plot, we determined tree stand structure and species diversity and identified all trees ≥1 cm in diameter. We recorded species guild (pioneer vs. shade tolerant), seed size, and dispersal mode. We analyzed and identified to what extent species showed a preference for forest edges/grasslands or core forest. Similarly, we looked for associations with elevation, distance to streams and forest versus grassland. We recorded 41,031 individuals belonging to 105 morphospecies in 87 genera and 47 families. Around 40% of all tree species, and 50% of the abundant species, showed a clear preference for either the edge/grassland habitat or the forest core. However, we found no obvious association between species guild, seed size or dispersal mode, and distance to edge, so what leads to this sorting remains unclear. Few species distributions were influenced by distance to streams or altitude.
Type: article
Authors: Abiem, Iveren; Arellano, Gabriel; Kenfack, David; Chapman, Hazel
Keywords: STRI
Abstract: Local factors can play an important role in defining tree species distributions in species rich tropical forests. To what extent the same applies to relatively small, species poor West African montane forests is unknown. Here, forests survive in a grassland matrix and fire has played a key role in their spatial and temporal dynamics since the Miocene. To what extent these dynamics influence local species distributions, as compared with other environmental variables such as altitude and moisture remain unknown. Here, we use data from the 20.28 ha montane forest plot in Ngel Nyaki Forest Reserve, South-East Nigeria to explore these questions. The plot features a gradient from grassland to core forest, with significant edges. Within the plot, we determined tree stand structure and species diversity and identified all trees ≥1 cm in diameter. We recorded species guild (pioneer vs. shade tolerant), seed size, and dispersal mode. We analyzed and identified to what extent species showed a preference for forest edges/grasslands or core forest. Similarly, we looked for associations with elevation, distance to streams and forest versus grassland. We recorded 41,031 individuals belonging to 105 morphospecies in 87 genera and 47 families. Around 40% of all tree species, and 50% of the abundant species, showed a clear preference for either the edge/grassland habitat or the forest core. However, we found no obvious association between species guild, seed size or dispersal mode, and distance to edge, so what leads to this sorting remains unclear. Few species distributions were influenced by distance to streams or altitude.
Asynchronous carbon sink saturation in African and Amazonian tropical forestsHubau, WannesLewis, Simon L.Phillips, Oliver L.Affum-Baffoe, KofiBeeckman, HansCuní-Sanchez, AidaDaniels, Armandu K.Ewango, Corneille E. N.Fauset, SophieMukinzi, Jacques M.Sheil, DouglasSonké, BonaventureSullivan, Martin J. P.Sunderland, Terry C. H.Taedoumg, HermannThomas, Sean C.White, Lee J. T.Abernethy, Katharine A.Adu-Bredu, StephenAmani, Christian A.Baker, Timothy R.Banin, Lindsay F.Baya, FidèleBegne, Serge K.Bennett, Amy C.Benedet, FabriceBitariho, RobertBocko, Yannick E.Boeckx, PascalBoundja, PatrickBrienen, Roel J. W.Brncic, TerryChezeaux, EricChuyong, George B.Clark, Connie J.Collins, MurrayComiskey, James A.Coomes, David A.Dargie, Greta C.de Haulleville, ThalesKamdem, Marie Noel DjuikouoDoucet, Jean-LouisEsquivel-Muelbert, AdrianeFeldpausch, Ted R.Fofanah, AlusineFoli, Ernest G.Gilpin, MartinGloor, EmanuelGonmadje, ChristelleGourlet-Fleury, SylvieHall, Jefferson S.Hamilton, Alan C.Harris, David J.Hart, Terese B.Hockemba, Mireille B. N.Hladik, AnnetteIfo, Suspense A.Jeffery, Kathryn J.Jucker, TommasoYakusu, Emmanuel KasongoKearsley, ElizabethKenfack, DavidKoch, AlexanderLeal, Miguel E.Levesley, AuroraLindsell, Jeremy A.Lisingo, JanvierLopez-Gonzalez, GabrielaLovett, Jon C.Makana, Jean-RemyMalhi, YadvinderMarshall, Andrew R.Martin, JimMartin, Emanuel H.Mbayu, Faustin M.Medjibe, Vincent P.Mihindou, VianetMitchard, Edward T. A.Moore, SamMunishi, Pantaleo K. T.Bengone, Natacha NssiOjo, LucasOndo, Fidèle EvounaPeh, Kelvin S. -HPickavance, Georgia C.Poulsen, Axel DalbergPoulsen, John R.Qie, LanReitsma, JanRovero, FrancescoSwaine, Michael D.Talbot, JoeyTaplin, JamesTaylor, David M.Thomas, Duncan W.Toirambe, BenjaminMukendi, John TshibambaTuagben, DarlingtonUmunay, Peter M.van der Heijden, Geertje M. F.Verbeeck, HansVleminckx, JasonWillcock, SimonWöll, HannsjörgWoods, John T.Zemagho, Lise2020DOI: info:10.1038/s41586-020-2035-0Naturev. 579No. 7797808780–871476-4687
Hubau, Wannes, Lewis, Simon L., Phillips, Oliver L., Affum-Baffoe, Kofi, Beeckman, Hans, Cuní-Sanchez, Aida, Daniels, Armandu K., Ewango, Corneille E. N., Fauset, Sophie, Mukinzi, Jacques M., Sheil, Douglas, Sonké, Bonaventure, Sullivan, Martin J. P., Sunderland, Terry C. H., Taedoumg, Hermann, Thomas, Sean C., White, Lee J. T., Abernethy, Katharine A., Adu-Bredu, Stephen, Amani, Christian A., Baker, Timothy R., Banin, Lindsay F., Baya, Fidèle, Begne, Serge K., Bennett, Amy C. et al. 2020. "Asynchronous carbon sink saturation in African and Amazonian tropical forests." Nature 579 (7797):80–87. https://doi.org/10.1038/s41586-020-2035-0
ID: 154770
Type: article
Authors: Hubau, Wannes; Lewis, Simon L.; Phillips, Oliver L.; Affum-Baffoe, Kofi; Beeckman, Hans; Cuní-Sanchez, Aida; Daniels, Armandu K.; Ewango, Corneille E. N.; Fauset, Sophie; Mukinzi, Jacques M.; Sheil, Douglas; Sonké, Bonaventure; Sullivan, Martin J. P.; Sunderland, Terry C. H.; Taedoumg, Hermann; Thomas, Sean C.; White, Lee J. T.; Abernethy, Katharine A.; Adu-Bredu, Stephen; Amani, Christian A.; Baker, Timothy R.; Banin, Lindsay F.; Baya, Fidèle; Begne, Serge K.; Bennett, Amy C.; Benedet, Fabrice; Bitariho, Robert; Bocko, Yannick E.; Boeckx, Pascal; Boundja, Patrick; Brienen, Roel J. W.; Brncic, Terry; Chezeaux, Eric; Chuyong, George B.; Clark, Connie J.; Collins, Murray; Comiskey, James A.; Coomes, David A.; Dargie, Greta C.; de Haulleville, Thales; Kamdem, Marie Noel Djuikouo; Doucet, Jean-Louis; Esquivel-Muelbert, Adriane; Feldpausch, Ted R.; Fofanah, Alusine; Foli, Ernest G.; Gilpin, Martin; Gloor, Emanuel; Gonmadje, Christelle; Gourlet-Fleury, Sylvie; Hall, Jefferson S.; Hamilton, Alan C.; Harris, David J.; Hart, Terese B.; Hockemba, Mireille B. N.; Hladik, Annette; Ifo, Suspense A.; Jeffery, Kathryn J.; Jucker, Tommaso; Yakusu, Emmanuel Kasongo; Kearsley, Elizabeth; Kenfack, David; Koch, Alexander; Leal, Miguel E.; Levesley, Aurora; Lindsell, Jeremy A.; Lisingo, Janvier; Lopez-Gonzalez, Gabriela; Lovett, Jon C.; Makana, Jean-Remy; Malhi, Yadvinder; Marshall, Andrew R.; Martin, Jim; Martin, Emanuel H.; Mbayu, Faustin M.; Medjibe, Vincent P.; Mihindou, Vianet; Mitchard, Edward T. A.; Moore, Sam; Munishi, Pantaleo K. T.; Bengone, Natacha Nssi; Ojo, Lucas; Ondo, Fidèle Evouna; Peh, Kelvin S. -H; Pickavance, Georgia C.; Poulsen, Axel Dalberg; Poulsen, John R.; Qie, Lan; Reitsma, Jan; Rovero, Francesco; Swaine, Michael D.; Talbot, Joey; Taplin, James; Taylor, David M.; Thomas, Duncan W.; Toirambe, Benjamin; Mukendi, John Tshibamba; Tuagben, Darlington; Umunay, Peter M.; van der Heijden, Geertje M. F.; Verbeeck, Hans; Vleminckx, Jason; Willcock, Simon; Wöll, Hannsjörg; Woods, John T.; Zemagho, Lise
Keywords: SERC; STRI
Abstract: Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions1-3. Climate-driven vegetation models typically predict that this tropical forest 'carbon sink' will continue for decades4,5. Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to 2015, at 0.66 tonnes of carbon per hectare per year (95 per cent confidence interval 0.53-0.79), in contrast to the long-term decline in Amazonian forests6. Therefore the carbon sink responses of Earth's two largest expanses of tropical forest have diverged. The difference is largely driven by carbon losses from tree mortality, with no detectable multi-decadal trend in Africa and a long-term increase in Amazonia. Both continents show increasing tree growth, consistent with the expected net effect of rising atmospheric carbon dioxide and air temperature7-9. Despite the past stability of the African carbon sink, our most intensively monitored plots suggest a post-2010 increase in carbon losses, delayed compared to Amazonia, indicating asynchronous carbon sink saturation on the two continents. A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth's intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass10 reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth's climate.
Type: article
Authors: Hubau, Wannes; Lewis, Simon L.; Phillips, Oliver L.; Affum-Baffoe, Kofi; Beeckman, Hans; Cuní-Sanchez, Aida; Daniels, Armandu K.; Ewango, Corneille E. N.; Fauset, Sophie; Mukinzi, Jacques M.; Sheil, Douglas; Sonké, Bonaventure; Sullivan, Martin J. P.; Sunderland, Terry C. H.; Taedoumg, Hermann; Thomas, Sean C.; White, Lee J. T.; Abernethy, Katharine A.; Adu-Bredu, Stephen; Amani, Christian A.; Baker, Timothy R.; Banin, Lindsay F.; Baya, Fidèle; Begne, Serge K.; Bennett, Amy C.; Benedet, Fabrice; Bitariho, Robert; Bocko, Yannick E.; Boeckx, Pascal; Boundja, Patrick; Brienen, Roel J. W.; Brncic, Terry; Chezeaux, Eric; Chuyong, George B.; Clark, Connie J.; Collins, Murray; Comiskey, James A.; Coomes, David A.; Dargie, Greta C.; de Haulleville, Thales; Kamdem, Marie Noel Djuikouo; Doucet, Jean-Louis; Esquivel-Muelbert, Adriane; Feldpausch, Ted R.; Fofanah, Alusine; Foli, Ernest G.; Gilpin, Martin; Gloor, Emanuel; Gonmadje, Christelle; Gourlet-Fleury, Sylvie; Hall, Jefferson S.; Hamilton, Alan C.; Harris, David J.; Hart, Terese B.; Hockemba, Mireille B. N.; Hladik, Annette; Ifo, Suspense A.; Jeffery, Kathryn J.; Jucker, Tommaso; Yakusu, Emmanuel Kasongo; Kearsley, Elizabeth; Kenfack, David; Koch, Alexander; Leal, Miguel E.; Levesley, Aurora; Lindsell, Jeremy A.; Lisingo, Janvier; Lopez-Gonzalez, Gabriela; Lovett, Jon C.; Makana, Jean-Remy; Malhi, Yadvinder; Marshall, Andrew R.; Martin, Jim; Martin, Emanuel H.; Mbayu, Faustin M.; Medjibe, Vincent P.; Mihindou, Vianet; Mitchard, Edward T. A.; Moore, Sam; Munishi, Pantaleo K. T.; Bengone, Natacha Nssi; Ojo, Lucas; Ondo, Fidèle Evouna; Peh, Kelvin S. -H; Pickavance, Georgia C.; Poulsen, Axel Dalberg; Poulsen, John R.; Qie, Lan; Reitsma, Jan; Rovero, Francesco; Swaine, Michael D.; Talbot, Joey; Taplin, James; Taylor, David M.; Thomas, Duncan W.; Toirambe, Benjamin; Mukendi, John Tshibamba; Tuagben, Darlington; Umunay, Peter M.; van der Heijden, Geertje M. F.; Verbeeck, Hans; Vleminckx, Jason; Willcock, Simon; Wöll, Hannsjörg; Woods, John T.; Zemagho, Lise
Keywords: SERC; STRI
Abstract: Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions1-3. Climate-driven vegetation models typically predict that this tropical forest 'carbon sink' will continue for decades4,5. Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to 2015, at 0.66 tonnes of carbon per hectare per year (95 per cent confidence interval 0.53-0.79), in contrast to the long-term decline in Amazonian forests6. Therefore the carbon sink responses of Earth's two largest expanses of tropical forest have diverged. The difference is largely driven by carbon losses from tree mortality, with no detectable multi-decadal trend in Africa and a long-term increase in Amazonia. Both continents show increasing tree growth, consistent with the expected net effect of rising atmospheric carbon dioxide and air temperature7-9. Despite the past stability of the African carbon sink, our most intensively monitored plots suggest a post-2010 increase in carbon losses, delayed compared to Amazonia, indicating asynchronous carbon sink saturation on the two continents. A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth's intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass10 reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth's climate.
Fine‐scale habitat heterogeneity influences browsing damage by elephant and giraffeKimuyu, Duncan M.Kenfack, DavidMusili, Paul M.Ang'ila, Robert O.2020DOI: info:10.1111/btp.12848Biotropica0006-3606
Kimuyu, Duncan M., Kenfack, David, Musili, Paul M., and Ang'ila, Robert O. 2020. "Fine‐scale habitat heterogeneity influences browsing damage by elephant and giraffe." Biotropica https://doi.org/10.1111/btp.12848
ID: 157188
Type: article
Authors: Kimuyu, Duncan M.; Kenfack, David; Musili, Paul M.; Ang'ila, Robert O.
Keywords: STRI
Type: article
Authors: Kimuyu, Duncan M.; Kenfack, David; Musili, Paul M.; Ang'ila, Robert O.
Keywords: STRI
Evaluating the potential of full-waveform lidar for mapping pan-tropical tree species richnessMarselis, Suzanne M.Abernethy, KatharineAlonso, AlfonsoArmston, JohnBaker, Timothy R.Bastin, Jean-FrancoisBogaert, JanBoyd, Doreen S.Boeckx, PascalBurslem, David F. R. P.Chazdon, RobinClark, David B.Coomes, DavidDuncanson, LauraHancock, StevenHill, RossHopkinson, ChrisKearsley, ElizabethKellner, James R.Kenfack, DavidLabriere, NicolasLewis, Simon L.Minor, DavidMemiaghe, HerveMonteagudo, AbelNilus, ReubenO'Brien, MichaelPhillips, Oliver L.Poulsen, JohnTang, HaoVerbeeck, HansDubayah, Ralph2020DOI: info:10.1111/geb.13158Global Ecology and Biogeography1466-822X
Marselis, Suzanne M., Abernethy, Katharine, Alonso, Alfonso, Armston, John, Baker, Timothy R., Bastin, Jean-Francois, Bogaert, Jan, Boyd, Doreen S., Boeckx, Pascal, Burslem, David F. R. P., Chazdon, Robin, Clark, David B., Coomes, David, Duncanson, Laura, Hancock, Steven, Hill, Ross, Hopkinson, Chris, Kearsley, Elizabeth, Kellner, James R., Kenfack, David, Labriere, Nicolas, Lewis, Simon L., Minor, David, Memiaghe, Herve, Monteagudo, Abel et al. 2020. "Evaluating the potential of full-waveform lidar for mapping pan-tropical tree species richness." Global Ecology and Biogeography https://doi.org/10.1111/geb.13158
ID: 156517
Type: article
Authors: Marselis, Suzanne M.; Abernethy, Katharine; Alonso, Alfonso; Armston, John; Baker, Timothy R.; Bastin, Jean-Francois; Bogaert, Jan; Boyd, Doreen S.; Boeckx, Pascal; Burslem, David F. R. P.; Chazdon, Robin; Clark, David B.; Coomes, David; Duncanson, Laura; Hancock, Steven; Hill, Ross; Hopkinson, Chris; Kearsley, Elizabeth; Kellner, James R.; Kenfack, David; Labriere, Nicolas; Lewis, Simon L.; Minor, David; Memiaghe, Herve; Monteagudo, Abel; Nilus, Reuben; O'Brien, Michael; Phillips, Oliver L.; Poulsen, John; Tang, Hao; Verbeeck, Hans; Dubayah, Ralph
Keywords: NZP; STRI
Abstract: Aim Mapping tree species richness across the tropics is of great interest for effective conservation and biodiversity management. In this study, we evaluated the potential of full-waveform lidar data for mapping tree species richness across the tropics by relating measurements of vertical canopy structure, as a proxy for the occupation of vertical niche space, to tree species richness. Location Tropics. Time period Present. Major taxa studied Trees. Methods First, we evaluated the characteristics of vertical canopy structure across 15 study sites using (simulated) large-footprint full-waveform lidar data (22 m diameter) and related these findings to in-situ tree species information. Then, we developed structure-richness models at the local (within 25-50 ha plots), regional (biogeographical regions) and pan-tropical scale at three spatial resolutions (1.0, 0.25 and 0.0625 ha) using Poisson regression. Results The results showed a weak structure-richness relationship at the local scale. At the regional scale (within a biogeographical region) a stronger relationship between canopy structure and tree species richness across different tropical forest types was found, for example across Central Africa and in South America [R(2)ranging from .44-.56, root mean squared difference as a percentage of the mean (RMSD%) ranging between 23-61%]. Modelling the relationship pan-tropically, across four continents, 39% of the variation in tree species richness could be explained with canopy structure alone (R-2 = .39 and RMSD% = 43%, 0.25-ha resolution). Main conclusions Our results may serve as a basis for the future development of a set of structure-richness models to map high resolution tree species richness using vertical canopy structure information from the Global Ecosystem Dynamics Investigation (GEDI). The value of this effort would be enhanced by access to a larger set of field reference data for all tropical regions. Future research could also support the use of GEDI data in frameworks using environmental and spectral information for modelling tree species richness across the tropics.
Type: article
Authors: Marselis, Suzanne M.; Abernethy, Katharine; Alonso, Alfonso; Armston, John; Baker, Timothy R.; Bastin, Jean-Francois; Bogaert, Jan; Boyd, Doreen S.; Boeckx, Pascal; Burslem, David F. R. P.; Chazdon, Robin; Clark, David B.; Coomes, David; Duncanson, Laura; Hancock, Steven; Hill, Ross; Hopkinson, Chris; Kearsley, Elizabeth; Kellner, James R.; Kenfack, David; Labriere, Nicolas; Lewis, Simon L.; Minor, David; Memiaghe, Herve; Monteagudo, Abel; Nilus, Reuben; O'Brien, Michael; Phillips, Oliver L.; Poulsen, John; Tang, Hao; Verbeeck, Hans; Dubayah, Ralph
Keywords: NZP; STRI
Abstract: Aim Mapping tree species richness across the tropics is of great interest for effective conservation and biodiversity management. In this study, we evaluated the potential of full-waveform lidar data for mapping tree species richness across the tropics by relating measurements of vertical canopy structure, as a proxy for the occupation of vertical niche space, to tree species richness. Location Tropics. Time period Present. Major taxa studied Trees. Methods First, we evaluated the characteristics of vertical canopy structure across 15 study sites using (simulated) large-footprint full-waveform lidar data (22 m diameter) and related these findings to in-situ tree species information. Then, we developed structure-richness models at the local (within 25-50 ha plots), regional (biogeographical regions) and pan-tropical scale at three spatial resolutions (1.0, 0.25 and 0.0625 ha) using Poisson regression. Results The results showed a weak structure-richness relationship at the local scale. At the regional scale (within a biogeographical region) a stronger relationship between canopy structure and tree species richness across different tropical forest types was found, for example across Central Africa and in South America [R(2)ranging from .44-.56, root mean squared difference as a percentage of the mean (RMSD%) ranging between 23-61%]. Modelling the relationship pan-tropically, across four continents, 39% of the variation in tree species richness could be explained with canopy structure alone (R-2 = .39 and RMSD% = 43%, 0.25-ha resolution). Main conclusions Our results may serve as a basis for the future development of a set of structure-richness models to map high resolution tree species richness using vertical canopy structure information from the Global Ecosystem Dynamics Investigation (GEDI). The value of this effort would be enhanced by access to a larger set of field reference data for all tropical regions. Future research could also support the use of GEDI data in frameworks using environmental and spectral information for modelling tree species richness across the tropics.
A map of African humid tropical forest aboveground biomass derived from management inventoriesPloton, PierreMortier, FredericBarbier, NicolasCornu, GuillaumeRejou-Mechain, MaximeRossi, VivienAlonso, AlfonsoBastin, Jean-FrancoisBayol, NicolasBenedet, FabriceBissiengou, PulcherieChuyong, GeorgesDemarquez, BenoitDoucet, Jean-LouisDroissart, VincentKamdem, Narcisse GuyKenfack, DavidMemiaghe, HerveMoses, LibalahSonkE, BonaventureTexier, NicolasThomas, DuncanZebaze, DonatienPelissier, RaphaelGourlet-Fleury, Sylvie2020DOI: info:10.1038/s41597-020-0561-0Scientific Datav. 7No. 1221221221–221
Ploton, Pierre, Mortier, Frederic, Barbier, Nicolas, Cornu, Guillaume, Rejou-Mechain, Maxime, Rossi, Vivien, Alonso, Alfonso, Bastin, Jean-Francois, Bayol, Nicolas, Benedet, Fabrice, Bissiengou, Pulcherie, Chuyong, Georges, Demarquez, Benoit, Doucet, Jean-Louis, Droissart, Vincent, Kamdem, Narcisse Guy, Kenfack, David, Memiaghe, Herve, Moses, Libalah, SonkE, Bonaventure, Texier, Nicolas, Thomas, Duncan, Zebaze, Donatien, Pelissier, Raphael, and Gourlet-Fleury, Sylvie. 2020. "A map of African humid tropical forest aboveground biomass derived from management inventories." Scientific Data 7 (1):221–221. https://doi.org/10.1038/s41597-020-0561-0
ID: 156520
Type: article
Authors: Ploton, Pierre; Mortier, Frederic; Barbier, Nicolas; Cornu, Guillaume; Rejou-Mechain, Maxime; Rossi, Vivien; Alonso, Alfonso; Bastin, Jean-Francois; Bayol, Nicolas; Benedet, Fabrice; Bissiengou, Pulcherie; Chuyong, Georges; Demarquez, Benoit; Doucet, Jean-Louis; Droissart, Vincent; Kamdem, Narcisse Guy; Kenfack, David; Memiaghe, Herve; Moses, Libalah; SonkE, Bonaventure; Texier, Nicolas; Thomas, Duncan; Zebaze, Donatien; Pelissier, Raphael; Gourlet-Fleury, Sylvie
Keywords: NZP; STRI
Abstract: Forest biomass is key in Earth carbon cycle and climate system, and thus under intense scrutiny in the context of international climate change mitigation initiatives (e.g. REDD+). In tropical forests, the spatial distribution of aboveground biomass (AGB) remains, however, highly uncertain. There is increasing recognition that progress is strongly limited by the lack of field observations over large and remote areas. Here, we introduce the Congo basin Forests AGB (CoFor-AGB) dataset that contains AGB estimations and associated uncertainty for 59,857 1-km pixels aggregated from nearly 100,000 ha ofin situforest management inventories for the 2000 - early 2010s period in five central African countries. A comprehensive error propagation scheme suggests that the uncertainty on AGB estimations derived from c. 0.5-ha inventory plots (8.6-15.0%) is only moderately higher than the error obtained from scientific sampling plots (8.3%). CoFor-AGB provides the first large scale view of forest AGB spatial variation from field data in central Africa, the second largest continuous tropical forest domain of the world.
Type: article
Authors: Ploton, Pierre; Mortier, Frederic; Barbier, Nicolas; Cornu, Guillaume; Rejou-Mechain, Maxime; Rossi, Vivien; Alonso, Alfonso; Bastin, Jean-Francois; Bayol, Nicolas; Benedet, Fabrice; Bissiengou, Pulcherie; Chuyong, Georges; Demarquez, Benoit; Doucet, Jean-Louis; Droissart, Vincent; Kamdem, Narcisse Guy; Kenfack, David; Memiaghe, Herve; Moses, Libalah; SonkE, Bonaventure; Texier, Nicolas; Thomas, Duncan; Zebaze, Donatien; Pelissier, Raphael; Gourlet-Fleury, Sylvie
Keywords: NZP; STRI
Abstract: Forest biomass is key in Earth carbon cycle and climate system, and thus under intense scrutiny in the context of international climate change mitigation initiatives (e.g. REDD+). In tropical forests, the spatial distribution of aboveground biomass (AGB) remains, however, highly uncertain. There is increasing recognition that progress is strongly limited by the lack of field observations over large and remote areas. Here, we introduce the Congo basin Forests AGB (CoFor-AGB) dataset that contains AGB estimations and associated uncertainty for 59,857 1-km pixels aggregated from nearly 100,000 ha ofin situforest management inventories for the 2000 - early 2010s period in five central African countries. A comprehensive error propagation scheme suggests that the uncertainty on AGB estimations derived from c. 0.5-ha inventory plots (8.6-15.0%) is only moderately higher than the error obtained from scientific sampling plots (8.3%). CoFor-AGB provides the first large scale view of forest AGB spatial variation from field data in central Africa, the second largest continuous tropical forest domain of the world.
Soil nitrogen concentration mediates the relationship between leguminous trees and neighbor diversity in tropical forestsXu, HanDetto, MatteoFang, SuqinChazdon, Robin L.Li, YideHau, Billy C. H.Fischer, Gunter A.Weiblen, George D.Hogan, J. A.Zimmerman, Jess K.Uriarte, MariaThompson, JillLian, JuyuCao, KeKenfack, DavidAlonso, AlfonsoBissiengou, PulchérieMemiaghe, Hervé RolandValencia, RenatoYap, Sandra L.Davies, Stuart J.Mi, XiangchengYao, Tze Leong2020DOI: info:10.1038/s42003-020-1041-yCommunications Biologyv. 3No. 13173172399-3642
Xu, Han, Detto, Matteo, Fang, Suqin, Chazdon, Robin L., Li, Yide, Hau, Billy C. H., Fischer, Gunter A., Weiblen, George D., Hogan, J. A., Zimmerman, Jess K., Uriarte, Maria, Thompson, Jill, Lian, Juyu, Cao, Ke, Kenfack, David, Alonso, Alfonso, Bissiengou, Pulchérie, Memiaghe, Hervé Roland, Valencia, Renato, Yap, Sandra L., Davies, Stuart J., Mi, Xiangcheng, and Yao, Tze Leong. 2020. "Soil nitrogen concentration mediates the relationship between leguminous trees and neighbor diversity in tropical forests." Communications Biology 3 (1):317. https://doi.org/10.1038/s42003-020-1041-y
ID: 155909
Type: article
Authors: Xu, Han; Detto, Matteo; Fang, Suqin; Chazdon, Robin L.; Li, Yide; Hau, Billy C. H.; Fischer, Gunter A.; Weiblen, George D.; Hogan, J. A.; Zimmerman, Jess K.; Uriarte, Maria; Thompson, Jill; Lian, Juyu; Cao, Ke; Kenfack, David; Alonso, Alfonso; Bissiengou, Pulchérie; Memiaghe, Hervé Roland; Valencia, Renato; Yap, Sandra L.; Davies, Stuart J.; Mi, Xiangcheng; Yao, Tze Leong
Keywords: STRI; NZP
Type: article
Authors: Xu, Han; Detto, Matteo; Fang, Suqin; Chazdon, Robin L.; Li, Yide; Hau, Billy C. H.; Fischer, Gunter A.; Weiblen, George D.; Hogan, J. A.; Zimmerman, Jess K.; Uriarte, Maria; Thompson, Jill; Lian, Juyu; Cao, Ke; Kenfack, David; Alonso, Alfonso; Bissiengou, Pulchérie; Memiaghe, Hervé Roland; Valencia, Renato; Yap, Sandra L.; Davies, Stuart J.; Mi, Xiangcheng; Yao, Tze Leong
Keywords: STRI; NZP
Direct and indirect effects of climate on richness drive the latitudinal diversity gradient in forest treesChu, ChengjinLutz, James A.Kral, KamilVrska, TomasYin, XueMyers, Jonathan A.Abiem, IverenAlonso, AlfonsoBourg, NormBurslem, David F. R. P.Cao, MinChapman, HazelCondit, Richard S.Fang, SuqinFischer, Gunter A.Gao, LianmingHao, ZhanqinHau, Billy C. H.He, QingHector, AndrewHubbell, Stephen P.Jiang, MingxiJin, GuangzeKenfack, DavidLai, JiangshanLi, BuhangLi, XiankunLi, YideLian, JuyuLin, LuxiangLiu, YankunLiu, YuLuo, YahuangMa, KepingMcShea, WilliamMemiaghe, HerveMi, XiangchengNi, MingO'Brien, Michael J.de Oliveira, Alexandre A.Orwig, David A.Parker, Geoffrey G.Qiao, XiujuanRen, HaibaoReynolds, GlenSang, WeiguoShen, GuochunSu, ZhiyaoSui, XinghuaSun, I-FangTian, SongyanWang, BinWang, XihuaWang, XugaoWang, YoushiWeiblen, George D.Wen, ShujunXi, NianxunXiang, WushengXu, HanXu, KunYe, WanhuiZhang, BingweiZhang, JiaxinZhang, XiaotongZhang, YingmingZhu, KaiZimmerman, JessStorch, DavidBaltzer, Jennifer L.Anderson-Teixeira, Kristina J.Mittelbach, Gary G.He, Fangliang2019DOI: info:10.1111/ele.13175Ecology Lettersv. 22No. 2245255245–2551461-023X
Chu, Chengjin, Lutz, James A., Kral, Kamil, Vrska, Tomas, Yin, Xue, Myers, Jonathan A., Abiem, Iveren, Alonso, Alfonso, Bourg, Norm, Burslem, David F. R. P., Cao, Min, Chapman, Hazel, Condit, Richard S., Fang, Suqin, Fischer, Gunter A., Gao, Lianming, Hao, Zhanqin, Hau, Billy C. H., He, Qing, Hector, Andrew, Hubbell, Stephen P., Jiang, Mingxi, Jin, Guangze, Kenfack, David, Lai, Jiangshan et al. 2019. "Direct and indirect effects of climate on richness drive the latitudinal diversity gradient in forest trees." Ecology Letters 22 (2):245–255. https://doi.org/10.1111/ele.13175
ID: 149947
Type: article
Authors: Chu, Chengjin; Lutz, James A.; Kral, Kamil; Vrska, Tomas; Yin, Xue; Myers, Jonathan A.; Abiem, Iveren; Alonso, Alfonso; Bourg, Norm; Burslem, David F. R. P.; Cao, Min; Chapman, Hazel; Condit, Richard S.; Fang, Suqin; Fischer, Gunter A.; Gao, Lianming; Hao, Zhanqin; Hau, Billy C. H.; He, Qing; Hector, Andrew; Hubbell, Stephen P.; Jiang, Mingxi; Jin, Guangze; Kenfack, David; Lai, Jiangshan; Li, Buhang; Li, Xiankun; Li, Yide; Lian, Juyu; Lin, Luxiang; Liu, Yankun; Liu, Yu; Luo, Yahuang; Ma, Keping; McShea, William; Memiaghe, Herve; Mi, Xiangcheng; Ni, Ming; O'Brien, Michael J.; de Oliveira, Alexandre A.; Orwig, David A.; Parker, Geoffrey G.; Qiao, Xiujuan; Ren, Haibao; Reynolds, Glen; Sang, Weiguo; Shen, Guochun; Su, Zhiyao; Sui, Xinghua; Sun, I-Fang; Tian, Songyan; Wang, Bin; Wang, Xihua; Wang, Xugao; Wang, Youshi; Weiblen, George D.; Wen, Shujun; Xi, Nianxun; Xiang, Wusheng; Xu, Han; Xu, Kun; Ye, Wanhui; Zhang, Bingwei; Zhang, Jiaxin; Zhang, Xiaotong; Zhang, Yingming; Zhu, Kai; Zimmerman, Jess; Storch, David; Baltzer, Jennifer L.; Anderson-Teixeira, Kristina J.; Mittelbach, Gary G.; He, Fangliang
Keywords: NZP; STRI; SERC; NMNH; NH-Botany
Abstract: Climate is widely recognised as an important determinant of the latitudinal diversity gradient. However, most existing studies make no distinction between direct and indirect effects of climate, which substantially hinders our understanding of how climate constrains biodiversity globally. Using data from 35 large forest plots, we test hypothesised relationships amongst climate, topography, forest structural attributes (stem abundance, tree size variation and stand basal area) and tree species richness to better understand drivers of latitudinal tree diversity patterns. Climate influences tree richness both directly, with more species in warm, moist, aseasonal climates and indirectly, with more species at higher stem abundance. These results imply direct limitation of species diversity by climatic stress and more rapid (co-)evolution and narrower niche partitioning in warm climates. They also support the idea that increased numbers of individuals associated with high primary productivity are partitioned to support a greater number of species.
Type: article
Authors: Chu, Chengjin; Lutz, James A.; Kral, Kamil; Vrska, Tomas; Yin, Xue; Myers, Jonathan A.; Abiem, Iveren; Alonso, Alfonso; Bourg, Norm; Burslem, David F. R. P.; Cao, Min; Chapman, Hazel; Condit, Richard S.; Fang, Suqin; Fischer, Gunter A.; Gao, Lianming; Hao, Zhanqin; Hau, Billy C. H.; He, Qing; Hector, Andrew; Hubbell, Stephen P.; Jiang, Mingxi; Jin, Guangze; Kenfack, David; Lai, Jiangshan; Li, Buhang; Li, Xiankun; Li, Yide; Lian, Juyu; Lin, Luxiang; Liu, Yankun; Liu, Yu; Luo, Yahuang; Ma, Keping; McShea, William; Memiaghe, Herve; Mi, Xiangcheng; Ni, Ming; O'Brien, Michael J.; de Oliveira, Alexandre A.; Orwig, David A.; Parker, Geoffrey G.; Qiao, Xiujuan; Ren, Haibao; Reynolds, Glen; Sang, Weiguo; Shen, Guochun; Su, Zhiyao; Sui, Xinghua; Sun, I-Fang; Tian, Songyan; Wang, Bin; Wang, Xihua; Wang, Xugao; Wang, Youshi; Weiblen, George D.; Wen, Shujun; Xi, Nianxun; Xiang, Wusheng; Xu, Han; Xu, Kun; Ye, Wanhui; Zhang, Bingwei; Zhang, Jiaxin; Zhang, Xiaotong; Zhang, Yingming; Zhu, Kai; Zimmerman, Jess; Storch, David; Baltzer, Jennifer L.; Anderson-Teixeira, Kristina J.; Mittelbach, Gary G.; He, Fangliang
Keywords: NZP; STRI; SERC; NMNH; NH-Botany
Abstract: Climate is widely recognised as an important determinant of the latitudinal diversity gradient. However, most existing studies make no distinction between direct and indirect effects of climate, which substantially hinders our understanding of how climate constrains biodiversity globally. Using data from 35 large forest plots, we test hypothesised relationships amongst climate, topography, forest structural attributes (stem abundance, tree size variation and stand basal area) and tree species richness to better understand drivers of latitudinal tree diversity patterns. Climate influences tree richness both directly, with more species in warm, moist, aseasonal climates and indirectly, with more species at higher stem abundance. These results imply direct limitation of species diversity by climatic stress and more rapid (co-)evolution and narrower niche partitioning in warm climates. They also support the idea that increased numbers of individuals associated with high primary productivity are partitioned to support a greater number of species.
Temporal population variability in local forest communities has mixed effects on tree species richness across a latitudinal gradientFung, TakChisholm, Ryan A.Anderson-Teixeira, Kristina J.Bourg, NormBrockelman, Warren Y.Bunyavejchewin, SarayudhChang‐Yang, Chia-HaoChitra‐Tarak, RutujaChuyong, GeorgeCondit, RichardDattaraja, Handanakere S.Davies, Stuart J.Ewango, Corneille E. N.Fewless, GaryFletcher, ChristineGunatilleke, C. V. S.Gunatilleke, I. A. U. N.Hao, ZhanqingHogan, J. A.Howe, RobertHsieh, Chang-FuKenfack, DavidLin, YichingMa, KepingMakana, Jean-RemyMcMahon, SeanMcShea, William J.Mi, XiangchengNathalang, AnuttaraOng, Perry S.Parker, GeoffreyRau, E. -PShue, JessicaSu, Sheng-HsinSukumar, RamanSun, I. -FSuresh, Hebbalalu S.Tan, SylvesterThomas, DuncanThompson, JillValencia, RenatoVallejo, Martha I.Wang, XugaoWang, YunquanWijekoon, PushpaWolf, AmyYap, SandraZimmerman, Jess2019DOI: info:10.1111/ele.13412Ecology Letters1121–121461-023X
Fung, Tak, Chisholm, Ryan A., Anderson-Teixeira, Kristina J., Bourg, Norm, Brockelman, Warren Y., Bunyavejchewin, Sarayudh, Chang‐Yang, Chia-Hao, Chitra‐Tarak, Rutuja, Chuyong, George, Condit, Richard, Dattaraja, Handanakere S., Davies, Stuart J., Ewango, Corneille E. N., Fewless, Gary, Fletcher, Christine, Gunatilleke, C. V. S., Gunatilleke, I. A. U. N., Hao, Zhanqing, Hogan, J. A., Howe, Robert, Hsieh, Chang-Fu, Kenfack, David, Lin, Yiching, Ma, Keping, Makana, Jean-Remy et al. 2019. "Temporal population variability in local forest communities has mixed effects on tree species richness across a latitudinal gradient." Ecology Letters 1–12. https://doi.org/10.1111/ele.13412
ID: 153274
Type: article
Authors: Fung, Tak; Chisholm, Ryan A.; Anderson-Teixeira, Kristina J.; Bourg, Norm; Brockelman, Warren Y.; Bunyavejchewin, Sarayudh; Chang‐Yang, Chia-Hao; Chitra‐Tarak, Rutuja; Chuyong, George; Condit, Richard; Dattaraja, Handanakere S.; Davies, Stuart J.; Ewango, Corneille E. N.; Fewless, Gary; Fletcher, Christine; Gunatilleke, C. V. S.; Gunatilleke, I. A. U. N.; Hao, Zhanqing; Hogan, J. A.; Howe, Robert; Hsieh, Chang-Fu; Kenfack, David; Lin, Yiching; Ma, Keping; Makana, Jean-Remy; McMahon, Sean; McShea, William J.; Mi, Xiangcheng; Nathalang, Anuttara; Ong, Perry S.; Parker, Geoffrey; Rau, E. -P; Shue, Jessica; Su, Sheng-Hsin; Sukumar, Raman; Sun, I. -F; Suresh, Hebbalalu S.; Tan, Sylvester; Thomas, Duncan; Thompson, Jill; Valencia, Renato; Vallejo, Martha I.; Wang, Xugao; Wang, Yunquan; Wijekoon, Pushpa; Wolf, Amy; Yap, Sandra; Zimmerman, Jess
Keywords: STRI; SERC; NZP
Abstract: Among the local processes that determine species diversity in ecological communities, fluctuation-dependent mechanisms that are mediated by temporal variability in the abundances of species populations have received significant attention. Higher temporal variability in the abundances of species populations can increase the strength of temporal niche partitioning but can also increase the risk of species extinctions, such that the net effect on species coexistence is not clear. We quantified this temporal population variability for tree species in 21 large forest plots and found much greater variability for higher latitude plots with fewer tree species. A fitted mechanistic model showed that among the forest plots, the net effect of temporal population variability on tree species coexistence was usually negative, but sometimes positive or negligible. Therefore, our results suggest that temporal variability in the abundances of species populations has no clear negative or positive contribution to the latitudinal gradient in tree species richness.
Type: article
Authors: Fung, Tak; Chisholm, Ryan A.; Anderson-Teixeira, Kristina J.; Bourg, Norm; Brockelman, Warren Y.; Bunyavejchewin, Sarayudh; Chang‐Yang, Chia-Hao; Chitra‐Tarak, Rutuja; Chuyong, George; Condit, Richard; Dattaraja, Handanakere S.; Davies, Stuart J.; Ewango, Corneille E. N.; Fewless, Gary; Fletcher, Christine; Gunatilleke, C. V. S.; Gunatilleke, I. A. U. N.; Hao, Zhanqing; Hogan, J. A.; Howe, Robert; Hsieh, Chang-Fu; Kenfack, David; Lin, Yiching; Ma, Keping; Makana, Jean-Remy; McMahon, Sean; McShea, William J.; Mi, Xiangcheng; Nathalang, Anuttara; Ong, Perry S.; Parker, Geoffrey; Rau, E. -P; Shue, Jessica; Su, Sheng-Hsin; Sukumar, Raman; Sun, I. -F; Suresh, Hebbalalu S.; Tan, Sylvester; Thomas, Duncan; Thompson, Jill; Valencia, Renato; Vallejo, Martha I.; Wang, Xugao; Wang, Yunquan; Wijekoon, Pushpa; Wolf, Amy; Yap, Sandra; Zimmerman, Jess
Keywords: STRI; SERC; NZP
Abstract: Among the local processes that determine species diversity in ecological communities, fluctuation-dependent mechanisms that are mediated by temporal variability in the abundances of species populations have received significant attention. Higher temporal variability in the abundances of species populations can increase the strength of temporal niche partitioning but can also increase the risk of species extinctions, such that the net effect on species coexistence is not clear. We quantified this temporal population variability for tree species in 21 large forest plots and found much greater variability for higher latitude plots with fewer tree species. A fitted mechanistic model showed that among the forest plots, the net effect of temporal population variability on tree species coexistence was usually negative, but sometimes positive or negligible. Therefore, our results suggest that temporal variability in the abundances of species populations has no clear negative or positive contribution to the latitudinal gradient in tree species richness.
A new species of Rhaptopetalum (Lecythidaceae) from south-western GabonKenfack, DavidNguema, Diosdado Ekomo2019DOI: info:10.3897/phytokeys.128.34640PhytoKeysv. 128394639–461314-2011
Kenfack, David and Nguema, Diosdado Ekomo. 2019. "A new species of Rhaptopetalum (Lecythidaceae) from south-western Gabon." PhytoKeys 128:39–46. https://doi.org/10.3897/phytokeys.128.34640
ID: 152052
Type: article
Authors: Kenfack, David; Nguema, Diosdado Ekomo
Keywords: NH-Botany; NMNH; STRI
Type: article
Authors: Kenfack, David; Nguema, Diosdado Ekomo
Keywords: NH-Botany; NMNH; STRI
Exploring the relation between remotely sensed vertical canopy structure and tree species diversity in GabonMarselis, Suzanne MariëlleTang, HaoArmston, JohnAbernethy, KatharineAlonso, AlfonsoBarbier, NicolasBissiengou, PulchérieJeffery, KathrynKenfack, DavidLabrière, NicolasLee, Seung KukLewis, SimonMemiaghe, HervéPoulsen, John R.White, LeeDubayah, Ralph2019DOI: info:10.1088/1748-9326/ab2dcdEnvironmental Research Lettersv. 14No. 91748-9326
Marselis, Suzanne Mariëlle, Tang, Hao, Armston, John, Abernethy, Katharine, Alonso, Alfonso, Barbier, Nicolas, Bissiengou, Pulchérie, Jeffery, Kathryn, Kenfack, David, Labrière, Nicolas, Lee, Seung Kuk, Lewis, Simon, Memiaghe, Hervé, Poulsen, John R., White, Lee, and Dubayah, Ralph. 2019. "Exploring the relation between remotely sensed vertical canopy structure and tree species diversity in Gabon." Environmental Research Letters 14 (9):https://doi.org/10.1088/1748-9326/ab2dcd
ID: 152059
Type: article
Authors: Marselis, Suzanne Mariëlle; Tang, Hao; Armston, John; Abernethy, Katharine; Alonso, Alfonso; Barbier, Nicolas; Bissiengou, Pulchérie; Jeffery, Kathryn; Kenfack, David; Labrière, Nicolas; Lee, Seung Kuk; Lewis, Simon; Memiaghe, Hervé; Poulsen, John R.; White, Lee; Dubayah, Ralph
Keywords: NZP; STRI
Abstract: Mapping tree species diversity is increasingly important in the face of environmental change and biodiversity conservation. We explore a potential way of mapping this diversity by relating forest structure to tree species diversity in Gabon. First, we test the relation between canopy height, as a proxy for niche volume, and tree species diversity. Then, we test the relation between vertical canopy structure, as a proxy for vertical niche occupation, and tree species diversity. We use large footprint full-waveform airborne lidar data collected across four study sites in Gabon (Lopé, Mabounié, Mondah, and Rabi) in combination with in-situ estimates of species richness (S) and Shannon diversity (H’). Linear models using canopy height explained 44 and 43% of the variation in S and H’ at the 0.25 ha resolution. Linear models using canopy height and the Plant Area Volume Density (PAVD) profile explained 71% of this variation. We demonstrate applications of these models by mapping S and H’ in Mondah using a simulated GEDI-TanDEM-X fusion height product, across the four sites using wall-to-wall airborne lidar data products, and across and between the study sites using ICESat lidar waveforms. The modeling results are encouraging in the context of developing pan-tropical structure-diversity models applicable to data from current and upcoming spaceborne remote sensing missions.
Type: article
Authors: Marselis, Suzanne Mariëlle; Tang, Hao; Armston, John; Abernethy, Katharine; Alonso, Alfonso; Barbier, Nicolas; Bissiengou, Pulchérie; Jeffery, Kathryn; Kenfack, David; Labrière, Nicolas; Lee, Seung Kuk; Lewis, Simon; Memiaghe, Hervé; Poulsen, John R.; White, Lee; Dubayah, Ralph
Keywords: NZP; STRI
Abstract: Mapping tree species diversity is increasingly important in the face of environmental change and biodiversity conservation. We explore a potential way of mapping this diversity by relating forest structure to tree species diversity in Gabon. First, we test the relation between canopy height, as a proxy for niche volume, and tree species diversity. Then, we test the relation between vertical canopy structure, as a proxy for vertical niche occupation, and tree species diversity. We use large footprint full-waveform airborne lidar data collected across four study sites in Gabon (Lopé, Mabounié, Mondah, and Rabi) in combination with in-situ estimates of species richness (S) and Shannon diversity (H’). Linear models using canopy height explained 44 and 43% of the variation in S and H’ at the 0.25 ha resolution. Linear models using canopy height and the Plant Area Volume Density (PAVD) profile explained 71% of this variation. We demonstrate applications of these models by mapping S and H’ in Mondah using a simulated GEDI-TanDEM-X fusion height product, across the four sites using wall-to-wall airborne lidar data products, and across and between the study sites using ICESat lidar waveforms. The modeling results are encouraging in the context of developing pan-tropical structure-diversity models applicable to data from current and upcoming spaceborne remote sensing missions.
Effect of local topographic heterogeneity on tree species assembly in an Acacia-dominated African savannaMutuku, Paul MusiliKenfack, David2019DOI: info:10.1017/S0266467419000014Journal of Tropical Ecologyv. 35No. 2465646–560266-4674
Mutuku, Paul Musili and Kenfack, David. 2019. "Effect of local topographic heterogeneity on tree species assembly in an Acacia-dominated African savanna." Journal of Tropical Ecology 35 (2):46–56. https://doi.org/10.1017/S0266467419000014
Determinants of spatial patterns of canopy tree species in a tropical evergreen forest in GabonObiang, Nestor Laurier EngoneKenfack, DavidPicard, NicolasLutz, James A.Bissiengou, PulchérieMemiaghe, Hervé R.Alonso, Alfonso2019DOI: info:10.1111/jvs.12778Journal of Vegetation Science1321–321654-1103
Obiang, Nestor Laurier Engone, Kenfack, David, Picard, Nicolas, Lutz, James A., Bissiengou, Pulchérie, Memiaghe, Hervé R., and Alonso, Alfonso. 2019. "Determinants of spatial patterns of canopy tree species in a tropical evergreen forest in Gabon." Journal of Vegetation Science 1–32. https://doi.org/10.1111/jvs.12778
ID: 151762
Type: article
Authors: Obiang, Nestor Laurier Engone; Kenfack, David; Picard, Nicolas; Lutz, James A.; Bissiengou, Pulchérie; Memiaghe, Hervé R.; Alonso, Alfonso
Keywords: STRI
Type: article
Authors: Obiang, Nestor Laurier Engone; Kenfack, David; Picard, Nicolas; Lutz, James A.; Bissiengou, Pulchérie; Memiaghe, Hervé R.; Alonso, Alfonso
Keywords: STRI
Environment- and trait-mediated scaling of tree occupancy in forests worldwideRen, HaibaoKeil, PetrMi, XiangchengMa, KepingHao, ZhanqingYe, WanhuiLin, LuxiangValencia, RenatoFletcher, Christine DawnThomas, Duncan W.Howe, Robert W.Lutz, JamesBourg, Norman A.Su, Sheng-HsinSun, I. F.Zhu, LiChang, Li-WanWang, XihuaDu, XiaojunKenfack, DavidChuyong, George B.Jetz, Walter2019DOI: info:10.1111/geb.12922Global Ecology and Biogeographyv. 28No. 8115511671155–11671466-822X
Ren, Haibao, Keil, Petr, Mi, Xiangcheng, Ma, Keping, Hao, Zhanqing, Ye, Wanhui, Lin, Luxiang, Valencia, Renato, Fletcher, Christine Dawn, Thomas, Duncan W., Howe, Robert W., Lutz, James, Bourg, Norman A., Su, Sheng-Hsin, Sun, I. F., Zhu, Li, Chang, Li-Wan, Wang, Xihua, Du, Xiaojun, Kenfack, David, Chuyong, George B., and Jetz, Walter. 2019. "Environment- and trait-mediated scaling of tree occupancy in forests worldwide." Global Ecology and Biogeography 28 (8):1155–1167. https://doi.org/10.1111/geb.12922
ID: 151772
Type: article
Authors: Ren, Haibao; Keil, Petr; Mi, Xiangcheng; Ma, Keping; Hao, Zhanqing; Ye, Wanhui; Lin, Luxiang; Valencia, Renato; Fletcher, Christine Dawn; Thomas, Duncan W.; Howe, Robert W.; Lutz, James; Bourg, Norman A.; Su, Sheng-Hsin; Sun, I. F.; Zhu, Li; Chang, Li-Wan; Wang, Xihua; Du, Xiaojun; Kenfack, David; Chuyong, George B.; Jetz, Walter
Keywords: STRI; NZP; NMNH; NH-Botany
Type: article
Authors: Ren, Haibao; Keil, Petr; Mi, Xiangcheng; Ma, Keping; Hao, Zhanqing; Ye, Wanhui; Lin, Luxiang; Valencia, Renato; Fletcher, Christine Dawn; Thomas, Duncan W.; Howe, Robert W.; Lutz, James; Bourg, Norman A.; Su, Sheng-Hsin; Sun, I. F.; Zhu, Li; Chang, Li-Wan; Wang, Xihua; Du, Xiaojun; Kenfack, David; Chuyong, George B.; Jetz, Walter
Keywords: STRI; NZP; NMNH; NH-Botany
Vegetation, floristic composition and structure of a tropical montane forest in CameroonSainge, Moses N.Lyonga, Ngoh M.Mbatchou, Gildas P. T.Kenfack, DavidNchu, FelixPeterson, Andrew T.2019DOI: info:10.4102/abc.v49i1.2270Bothalia : African Biodiversity and Conservationv. 49No. 11121–122311-4207
Sainge, Moses N., Lyonga, Ngoh M., Mbatchou, Gildas P. T., Kenfack, David, Nchu, Felix, and Peterson, Andrew T. 2019. "Vegetation, floristic composition and structure of a tropical montane forest in Cameroon." Bothalia : African Biodiversity and Conservation 49 (1):1–12. https://doi.org/10.4102/abc.v49i1.2270
ID: 152060
Type: article
Authors: Sainge, Moses N.; Lyonga, Ngoh M.; Mbatchou, Gildas P. T.; Kenfack, David; Nchu, Felix; Peterson, Andrew T.
Keywords: STRI
Type: article
Authors: Sainge, Moses N.; Lyonga, Ngoh M.; Mbatchou, Gildas P. T.; Kenfack, David; Nchu, Felix; Peterson, Andrew T.
Keywords: STRI
Pan-tropical prediction of forest structure from the largest treesBastin, Jean-FrançoisRutishauser, ErvanKellner, James R.Saatchi, SassanPélissier, RaphaelHérault, BrunoSlik, FerryBogaert, JanCannière, Charles DeMarshall, Andrew R.Poulsen, JohnAlvarez‐Loyayza, PatriciaAndrade, AnaAngbonga‐Basia, AlbertAraujo‐Murakami, AlejandroArroyo, LuzmilaAyyappan, NarayananAzevedo, Celso Paulo deBanki, OlafBarbier, NicolasBarroso, Jorcely G.Beeckman, HansBitariho, RobertBoeckx, PascalBoehning‐Gaese, KatrinBrandão, HilandiaBrearley, Francis Q.Hockemba, Mireille Breuer NdoundouBrienen, RoelCamargo, Jose Luis C.Campos‐Arceiz, AhimsaCassart, BenoitChave, JéChazdon, RobinChuyong, GeorgesClark, David B.Clark, Connie J.Condit, Richard S.Coronado, Euridice N. HonorioDavidar, PriyaHaulleville, Thalès deDescroix, LaurentDoucet, Jean-LouisDourdain, AurelieDroissart, VincentDuncan, ThomasEspejo, Javier SilvaEspinosa, SantiagoFarwig, NinaFayolle, AdelineFeldpausch, Ted R.Ferraz, AntonioFletcher, ChristineGajapersad, KrisnaGillet, Jean-FrançoisAmaral, IêGonmadje, ChristelleGrogan, JamesHarris, DavidHerzog, Sebastian K.Homeier, JüHubau, WannesHubbell, Stephen P.Hufkens, KoenHurtado, JohannaKamdem, Narcisse G.Kearsley, ElizabethKenfack, DavidKessler, MichaelLabrière, NicolasLaumonier, YvesLaurance, SusanLaurance, William F.Lewis, Simon L.Libalah, Moses B.Ligot, GauthierLloyd, JonLovejoy, Thomas E.Malhi, YadvinderMarimon, Beatriz S.Junior, Ben Hur MarimonMartin, Emmanuel H.Matius, PaulusMeyer, VictoriaBautista, Casimero MendozaMonteagudo‐Mendoza, AbelMtui, ArafatNeill, DavidGutierrez, Germaine Alexander ParadaPardo, GuidoParren, MarcParthasarathy, N.Phillips, Oliver L.Pitman, Nigel C. A.Ploton, PierrePonette, QuentinRamesh, B. R.Razafimahaimodison, Jean-ClaudeRéjou‐Méchain, MaximeRolim, Samir GonçalvesSaltos, Hugo RomeroRossi, Luiz Marcelo BrumSpironello, Wilson RobertoRovero, FrancescoSaner, PhilippeSasaki, DeniseSchulze, MarkSilveira, MarcosSingh, JamesSist, PlinioSonkE, BonaventureSoto, J. D.Souza, Cintia Rodrigues deStropp, JulianaSullivan, Martin J. P.Swanepoel, BenSteege, Hans terTerborgh, JohnTexier, NicolasToma, TakeshiValencia, RenatoValenzuela, LuisFerreira, Leandro ValleValverde, Fernando CornejoAndel, Tinde R. vanVasque, RodolfoVerbeeck, HansVivek, PandiVleminckx, JasonVos, Vincent A.Wagner, Fabien H.Warsudi, Papi PuspaWortel, VerginiaZagt, Roderick J.Zebaze, Donatien2018DOI: info:10.1111/geb.12803Global Ecology and Biogeographyv. 27No. 11136613831366–13831466-822X
Bastin, Jean-François, Rutishauser, Ervan, Kellner, James R., Saatchi, Sassan, Pélissier, Raphael, Hérault, Bruno, Slik, Ferry, Bogaert, Jan, Cannière, Charles De, Marshall, Andrew R., Poulsen, John, Alvarez‐Loyayza, Patricia, Andrade, Ana, Angbonga‐Basia, Albert, Araujo‐Murakami, Alejandro, Arroyo, Luzmila, Ayyappan, Narayanan, Azevedo, Celso Paulo de, Banki, Olaf, Barbier, Nicolas, Barroso, Jorcely G., Beeckman, Hans, Bitariho, Robert, Boeckx, Pascal, Boehning‐Gaese, Katrin et al. 2018. "Pan-tropical prediction of forest structure from the largest trees." Global Ecology and Biogeography 27 (11):1366–1383. https://doi.org/10.1111/geb.12803
ID: 150307
Type: article
Authors: Bastin, Jean-François; Rutishauser, Ervan; Kellner, James R.; Saatchi, Sassan; Pélissier, Raphael; Hérault, Bruno; Slik, Ferry; Bogaert, Jan; Cannière, Charles De; Marshall, Andrew R.; Poulsen, John; Alvarez‐Loyayza, Patricia; Andrade, Ana; Angbonga‐Basia, Albert; Araujo‐Murakami, Alejandro; Arroyo, Luzmila; Ayyappan, Narayanan; Azevedo, Celso Paulo de; Banki, Olaf; Barbier, Nicolas; Barroso, Jorcely G.; Beeckman, Hans; Bitariho, Robert; Boeckx, Pascal; Boehning‐Gaese, Katrin; Brandão, Hilandia; Brearley, Francis Q.; Hockemba, Mireille Breuer Ndoundou; Brienen, Roel; Camargo, Jose Luis C.; Campos‐Arceiz, Ahimsa; Cassart, Benoit; Chave, Jé; Chazdon, Robin; Chuyong, Georges; Clark, David B.; Clark, Connie J.; Condit, Richard S.; Coronado, Euridice N. Honorio; Davidar, Priya; Haulleville, Thalès de; Descroix, Laurent; Doucet, Jean-Louis; Dourdain, Aurelie; Droissart, Vincent; Duncan, Thomas; Espejo, Javier Silva; Espinosa, Santiago; Farwig, Nina; Fayolle, Adeline; Feldpausch, Ted R.; Ferraz, Antonio; Fletcher, Christine; Gajapersad, Krisna; Gillet, Jean-François; Amaral, Iê; Gonmadje, Christelle; Grogan, James; Harris, David; Herzog, Sebastian K.; Homeier, Jü; Hubau, Wannes; Hubbell, Stephen P.; Hufkens, Koen; Hurtado, Johanna; Kamdem, Narcisse G.; Kearsley, Elizabeth; Kenfack, David; Kessler, Michael; Labrière, Nicolas; Laumonier, Yves; Laurance, Susan; Laurance, William F.; Lewis, Simon L.; Libalah, Moses B.; Ligot, Gauthier; Lloyd, Jon; Lovejoy, Thomas E.; Malhi, Yadvinder; Marimon, Beatriz S.; Junior, Ben Hur Marimon; Martin, Emmanuel H.; Matius, Paulus; Meyer, Victoria; Bautista, Casimero Mendoza; Monteagudo‐Mendoza, Abel; Mtui, Arafat; Neill, David; Gutierrez, Germaine Alexander Parada; Pardo, Guido; Parren, Marc; Parthasarathy, N.; Phillips, Oliver L.; Pitman, Nigel C. A.; Ploton, Pierre; Ponette, Quentin; Ramesh, B. R.; Razafimahaimodison, Jean-Claude; Réjou‐Méchain, Maxime; Rolim, Samir Gonçalves; Saltos, Hugo Romero; Rossi, Luiz Marcelo Brum; Spironello, Wilson Roberto; Rovero, Francesco; Saner, Philippe; Sasaki, Denise; Schulze, Mark; Silveira, Marcos; Singh, James; Sist, Plinio; SonkE, Bonaventure; Soto, J. D.; Souza, Cintia Rodrigues de; Stropp, Juliana; Sullivan, Martin J. P.; Swanepoel, Ben; Steege, Hans ter; Terborgh, John; Texier, Nicolas; Toma, Takeshi; Valencia, Renato; Valenzuela, Luis; Ferreira, Leandro Valle; Valverde, Fernando Cornejo; Andel, Tinde R. van; Vasque, Rodolfo; Verbeeck, Hans; Vivek, Pandi; Vleminckx, Jason; Vos, Vincent A.; Wagner, Fabien H.; Warsudi, Papi Puspa; Wortel, Verginia; Zagt, Roderick J.; Zebaze, Donatien
Keywords: STRI
Abstract: Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and field inventories. To close this gap, we propose a new pan-tropical model to predict plot-level forest structure properties and biomass from only the largest trees. Location Pan-tropical. Time period Early 21st century. Major taxa studied Woody plants. Methods Using a dataset of 867 plots distributed among 118 sites across the tropics, we tested the prediction of the quadratic mean diameter, basal area, Lorey's height, community wood density and aboveground biomass (AGB) from the ith largest trees. Results Measuring the largest trees in tropical forests enables unbiased predictions of plot- and site-level forest structure. The 20 largest trees per hectare predicted quadratic mean diameter, basal area, Lorey's height, community wood density and AGB with 12, 16, 4, 4 and 17.7% of relative error, respectively. Most of the remaining error in biomass prediction is driven by differences in the proportion of total biomass held in medium-sized trees (50–70 cm diameter at breast height), which shows some continental dependency, with American tropical forests presenting the highest proportion of total biomass in these intermediate-diameter classes relative to other continents. Main conclusions Our approach provides new information on tropical forest structure and can be used to generate accurate field estimates of tropical forest carbon stocks to support the calibration and validation of current and forthcoming space missions. It will reduce the cost of field inventories and contribute to scientific understanding of tropical forest ecosystems and response to climate change.
Type: article
Authors: Bastin, Jean-François; Rutishauser, Ervan; Kellner, James R.; Saatchi, Sassan; Pélissier, Raphael; Hérault, Bruno; Slik, Ferry; Bogaert, Jan; Cannière, Charles De; Marshall, Andrew R.; Poulsen, John; Alvarez‐Loyayza, Patricia; Andrade, Ana; Angbonga‐Basia, Albert; Araujo‐Murakami, Alejandro; Arroyo, Luzmila; Ayyappan, Narayanan; Azevedo, Celso Paulo de; Banki, Olaf; Barbier, Nicolas; Barroso, Jorcely G.; Beeckman, Hans; Bitariho, Robert; Boeckx, Pascal; Boehning‐Gaese, Katrin; Brandão, Hilandia; Brearley, Francis Q.; Hockemba, Mireille Breuer Ndoundou; Brienen, Roel; Camargo, Jose Luis C.; Campos‐Arceiz, Ahimsa; Cassart, Benoit; Chave, Jé; Chazdon, Robin; Chuyong, Georges; Clark, David B.; Clark, Connie J.; Condit, Richard S.; Coronado, Euridice N. Honorio; Davidar, Priya; Haulleville, Thalès de; Descroix, Laurent; Doucet, Jean-Louis; Dourdain, Aurelie; Droissart, Vincent; Duncan, Thomas; Espejo, Javier Silva; Espinosa, Santiago; Farwig, Nina; Fayolle, Adeline; Feldpausch, Ted R.; Ferraz, Antonio; Fletcher, Christine; Gajapersad, Krisna; Gillet, Jean-François; Amaral, Iê; Gonmadje, Christelle; Grogan, James; Harris, David; Herzog, Sebastian K.; Homeier, Jü; Hubau, Wannes; Hubbell, Stephen P.; Hufkens, Koen; Hurtado, Johanna; Kamdem, Narcisse G.; Kearsley, Elizabeth; Kenfack, David; Kessler, Michael; Labrière, Nicolas; Laumonier, Yves; Laurance, Susan; Laurance, William F.; Lewis, Simon L.; Libalah, Moses B.; Ligot, Gauthier; Lloyd, Jon; Lovejoy, Thomas E.; Malhi, Yadvinder; Marimon, Beatriz S.; Junior, Ben Hur Marimon; Martin, Emmanuel H.; Matius, Paulus; Meyer, Victoria; Bautista, Casimero Mendoza; Monteagudo‐Mendoza, Abel; Mtui, Arafat; Neill, David; Gutierrez, Germaine Alexander Parada; Pardo, Guido; Parren, Marc; Parthasarathy, N.; Phillips, Oliver L.; Pitman, Nigel C. A.; Ploton, Pierre; Ponette, Quentin; Ramesh, B. R.; Razafimahaimodison, Jean-Claude; Réjou‐Méchain, Maxime; Rolim, Samir Gonçalves; Saltos, Hugo Romero; Rossi, Luiz Marcelo Brum; Spironello, Wilson Roberto; Rovero, Francesco; Saner, Philippe; Sasaki, Denise; Schulze, Mark; Silveira, Marcos; Singh, James; Sist, Plinio; SonkE, Bonaventure; Soto, J. D.; Souza, Cintia Rodrigues de; Stropp, Juliana; Sullivan, Martin J. P.; Swanepoel, Ben; Steege, Hans ter; Terborgh, John; Texier, Nicolas; Toma, Takeshi; Valencia, Renato; Valenzuela, Luis; Ferreira, Leandro Valle; Valverde, Fernando Cornejo; Andel, Tinde R. van; Vasque, Rodolfo; Verbeeck, Hans; Vivek, Pandi; Vleminckx, Jason; Vos, Vincent A.; Wagner, Fabien H.; Warsudi, Papi Puspa; Wortel, Verginia; Zagt, Roderick J.; Zebaze, Donatien
Keywords: STRI
Abstract: Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and field inventories. To close this gap, we propose a new pan-tropical model to predict plot-level forest structure properties and biomass from only the largest trees. Location Pan-tropical. Time period Early 21st century. Major taxa studied Woody plants. Methods Using a dataset of 867 plots distributed among 118 sites across the tropics, we tested the prediction of the quadratic mean diameter, basal area, Lorey's height, community wood density and aboveground biomass (AGB) from the ith largest trees. Results Measuring the largest trees in tropical forests enables unbiased predictions of plot- and site-level forest structure. The 20 largest trees per hectare predicted quadratic mean diameter, basal area, Lorey's height, community wood density and AGB with 12, 16, 4, 4 and 17.7% of relative error, respectively. Most of the remaining error in biomass prediction is driven by differences in the proportion of total biomass held in medium-sized trees (50–70 cm diameter at breast height), which shows some continental dependency, with American tropical forests presenting the highest proportion of total biomass in these intermediate-diameter classes relative to other continents. Main conclusions Our approach provides new information on tropical forest structure and can be used to generate accurate field estimates of tropical forest carbon stocks to support the calibration and validation of current and forthcoming space missions. It will reduce the cost of field inventories and contribute to scientific understanding of tropical forest ecosystems and response to climate change.
Polygyny does not explain the superior competitive ability of dominant ant associates in the African ant-plant, Acacia (Vachellia) drepanolobiumBoyle, John H.Martins, Dino J.Pelaez, JulianneMusili, Paul M.Kibet, StalineNdung'u, S. KimaniKenfack, DavidPierce, Naomi E.2018DOI: info:10.1002/ece3.3752Ecology and Evolutionv. 8No. 3144114501441–14502045-7758
Boyle, John H., Martins, Dino J., Pelaez, Julianne, Musili, Paul M., Kibet, Staline, Ndung'u, S. Kimani, Kenfack, David, and Pierce, Naomi E. 2018. "Polygyny does not explain the superior competitive ability of dominant ant associates in the African ant-plant, Acacia (Vachellia) drepanolobium." Ecology and Evolution 8 (3):1441–1450. https://doi.org/10.1002/ece3.3752
ID: 149418
Type: article
Authors: Boyle, John H.; Martins, Dino J.; Pelaez, Julianne; Musili, Paul M.; Kibet, Staline; Ndung'u, S. Kimani; Kenfack, David; Pierce, Naomi E.
Keywords: STRI
Abstract: The Acacia drepanolobium (also known as Vachellia drepanolobium) ant-plant symbiosis is considered a classic case of species coexistence, in which four species of tree-defending ants compete for nesting space in a single host tree species. Coexistence in this system has been explained by trade-offs in the ability of the ant associates to compete with each other for occupied trees versus the ability to colonize unoccupied trees. We seek to understand the proximal reasons for how and why the ant species vary in competitive or colonizing abilities, which are largely unknown. In this study, we use RADseq-derived SNPs to identify relatedness of workers in colonies to test the hypothesis that competitively dominant ants reach large colony sizes due to polygyny, that is, the presence of multiple egg-laying queens in a single colony. We find that variation in polygyny is not associated with competitive ability; in fact, the most dominant species, unexpectedly, showed little evidence of polygyny. We also use these markers to investigate variation in mating behavior among the ant species and find that different species vary in the number of males fathering the offspring of each colony. Finally, we show that the nature of polygyny varies between the two commonly polygynous species, Crematogaster mimosae and Tetraponera penzigi: in C.mimosae, queens in the same colony are often related, while this is not the case for T.penzigi. These results shed light on factors influencing the evolution of species coexistence in an ant-plant mutualism, as well as demonstrating the effectiveness of RADseq-derived SNPs for parentage analysis.
Type: article
Authors: Boyle, John H.; Martins, Dino J.; Pelaez, Julianne; Musili, Paul M.; Kibet, Staline; Ndung'u, S. Kimani; Kenfack, David; Pierce, Naomi E.
Keywords: STRI
Abstract: The Acacia drepanolobium (also known as Vachellia drepanolobium) ant-plant symbiosis is considered a classic case of species coexistence, in which four species of tree-defending ants compete for nesting space in a single host tree species. Coexistence in this system has been explained by trade-offs in the ability of the ant associates to compete with each other for occupied trees versus the ability to colonize unoccupied trees. We seek to understand the proximal reasons for how and why the ant species vary in competitive or colonizing abilities, which are largely unknown. In this study, we use RADseq-derived SNPs to identify relatedness of workers in colonies to test the hypothesis that competitively dominant ants reach large colony sizes due to polygyny, that is, the presence of multiple egg-laying queens in a single colony. We find that variation in polygyny is not associated with competitive ability; in fact, the most dominant species, unexpectedly, showed little evidence of polygyny. We also use these markers to investigate variation in mating behavior among the ant species and find that different species vary in the number of males fathering the offspring of each colony. Finally, we show that the nature of polygyny varies between the two commonly polygynous species, Crematogaster mimosae and Tetraponera penzigi: in C.mimosae, queens in the same colony are often related, while this is not the case for T.penzigi. These results shed light on factors influencing the evolution of species coexistence in an ant-plant mutualism, as well as demonstrating the effectiveness of RADseq-derived SNPs for parentage analysis.
Climate sensitive size-dependent survival in tropical treesJohnson, Daniel J.Needham, JessicaXu, ChonggangMassoud, Elias C.Davies, Stuart J.Anderson-Teixeira, Kristina J.Bunyavejchewin, SarayudhChambers, Jeffery Q.Chang-Yang, Chia-HaoChiang, Jyh-MinChuyong, George B.Condit, Richard S.Cordell, SusanFletcher, ChristineGiardina, Christian P.Giambelluca, Thomas W.Gunatilleke, NimalGunatilleke, SavitriHsieh, Chang-FuHubbell, StephenInman-Narahari, FaithKassim, Abdul RahmanKatabuchi, MasatoshiKenfack, DavidLitton, Creighton M.Lum, ShawnMohamad, MohizahNasardin, MusalmahOng, Perry S.Ostertag, RebeccaSack, LawrenSwenson, Nathan G.Sun, I. FangTan, SylvesterThomas, Duncan W.Thompson, JillUmana, Maria NataliaUriarte, MariaValencia, RenatoYap, SandraZimmerman, JessMcDowell, Nate G.McMahon, Sean M.2018DOI: info:10.1038/s41559-018-0626-zNature Ecology & Evolutionv. 2No. 9143614421436–14422397-334X
Johnson, Daniel J., Needham, Jessica, Xu, Chonggang, Massoud, Elias C., Davies, Stuart J., Anderson-Teixeira, Kristina J., Bunyavejchewin, Sarayudh, Chambers, Jeffery Q., Chang-Yang, Chia-Hao, Chiang, Jyh-Min, Chuyong, George B., Condit, Richard S., Cordell, Susan, Fletcher, Christine, Giardina, Christian P., Giambelluca, Thomas W., Gunatilleke, Nimal, Gunatilleke, Savitri, Hsieh, Chang-Fu, Hubbell, Stephen, Inman-Narahari, Faith, Kassim, Abdul Rahman, Katabuchi, Masatoshi, Kenfack, David, Litton, Creighton M. et al. 2018. "Climate sensitive size-dependent survival in tropical trees." Nature Ecology & Evolution 2 (9):1436–1442. https://doi.org/10.1038/s41559-018-0626-z
ID: 148617
Type: article
Authors: Johnson, Daniel J.; Needham, Jessica; Xu, Chonggang; Massoud, Elias C.; Davies, Stuart J.; Anderson-Teixeira, Kristina J.; Bunyavejchewin, Sarayudh; Chambers, Jeffery Q.; Chang-Yang, Chia-Hao; Chiang, Jyh-Min; Chuyong, George B.; Condit, Richard S.; Cordell, Susan; Fletcher, Christine; Giardina, Christian P.; Giambelluca, Thomas W.; Gunatilleke, Nimal; Gunatilleke, Savitri; Hsieh, Chang-Fu; Hubbell, Stephen; Inman-Narahari, Faith; Kassim, Abdul Rahman; Katabuchi, Masatoshi; Kenfack, David; Litton, Creighton M.; Lum, Shawn; Mohamad, Mohizah; Nasardin, Musalmah; Ong, Perry S.; Ostertag, Rebecca; Sack, Lawren; Swenson, Nathan G.; Sun, I. Fang; Tan, Sylvester; Thomas, Duncan W.; Thompson, Jill; Umana, Maria Natalia; Uriarte, Maria; Valencia, Renato; Yap, Sandra; Zimmerman, Jess; McDowell, Nate G.; McMahon, Sean M.
Keywords: SERC; NZP; STRI
Abstract: Survival rates of large trees determine forest biomass dynamics. Survival rates of small trees have been linked to mechanisms that maintain biodiversity across tropical forests. How species survival rates change with size offers insight into the links between biodiversity and ecosystem function across tropical forests. We tested patterns of size-dependent tree survival across the tropics using data from 1,781 species and over 2 million individuals to assess whether tropical forests can be characterized by size-dependent life-history survival strategies. We found that species were classifiable into four 'survival modes' that explain life-history variation that shapes carbon cycling and the relative abundance within forests. Frequently collected functional traits, such as wood density, leaf mass per area and seed mass, were not generally predictive of the survival modes of species. Mean annual temperature and cumulative water deficit predicted the proportion of biomass of survival modes, indicating important links between evolutionary strategies, climate and carbon cycling. The application of survival modes in demographic simulations predicted biomass change across forest sites. Our results reveal globally identifiable size-dependent survival strategies that differ across diverse systems in a consistent way. The abundance of survival modes and interaction with climate ultimately determine forest structure, carbon storage in biomass and future forest trajectories.
Type: article
Authors: Johnson, Daniel J.; Needham, Jessica; Xu, Chonggang; Massoud, Elias C.; Davies, Stuart J.; Anderson-Teixeira, Kristina J.; Bunyavejchewin, Sarayudh; Chambers, Jeffery Q.; Chang-Yang, Chia-Hao; Chiang, Jyh-Min; Chuyong, George B.; Condit, Richard S.; Cordell, Susan; Fletcher, Christine; Giardina, Christian P.; Giambelluca, Thomas W.; Gunatilleke, Nimal; Gunatilleke, Savitri; Hsieh, Chang-Fu; Hubbell, Stephen; Inman-Narahari, Faith; Kassim, Abdul Rahman; Katabuchi, Masatoshi; Kenfack, David; Litton, Creighton M.; Lum, Shawn; Mohamad, Mohizah; Nasardin, Musalmah; Ong, Perry S.; Ostertag, Rebecca; Sack, Lawren; Swenson, Nathan G.; Sun, I. Fang; Tan, Sylvester; Thomas, Duncan W.; Thompson, Jill; Umana, Maria Natalia; Uriarte, Maria; Valencia, Renato; Yap, Sandra; Zimmerman, Jess; McDowell, Nate G.; McMahon, Sean M.
Keywords: SERC; NZP; STRI
Abstract: Survival rates of large trees determine forest biomass dynamics. Survival rates of small trees have been linked to mechanisms that maintain biodiversity across tropical forests. How species survival rates change with size offers insight into the links between biodiversity and ecosystem function across tropical forests. We tested patterns of size-dependent tree survival across the tropics using data from 1,781 species and over 2 million individuals to assess whether tropical forests can be characterized by size-dependent life-history survival strategies. We found that species were classifiable into four 'survival modes' that explain life-history variation that shapes carbon cycling and the relative abundance within forests. Frequently collected functional traits, such as wood density, leaf mass per area and seed mass, were not generally predictive of the survival modes of species. Mean annual temperature and cumulative water deficit predicted the proportion of biomass of survival modes, indicating important links between evolutionary strategies, climate and carbon cycling. The application of survival modes in demographic simulations predicted biomass change across forest sites. Our results reveal globally identifiable size-dependent survival strategies that differ across diverse systems in a consistent way. The abundance of survival modes and interaction with climate ultimately determine forest structure, carbon storage in biomass and future forest trajectories.
The genus Cola (Malvaceae) in Cameroon's Korup National Park, with two noveltiesKenfack, DavidSainge, Moses N.Chuyong, George B.Thomas, Duncan W.2018DOI: info:10.5091/plecevo.2018.1410Plant Ecology and Evolutionv. 151No. 2241251241–2512032-3913
Kenfack, David, Sainge, Moses N., Chuyong, George B., and Thomas, Duncan W. 2018. "The genus Cola (Malvaceae) in Cameroon's Korup National Park, with two novelties." Plant Ecology and Evolution 151 (2):241–251. https://doi.org/10.5091/plecevo.2018.1410
ID: 148410
Type: article
Authors: Kenfack, David; Sainge, Moses N.; Chuyong, George B.; Thomas, Duncan W.
Keywords: STRI
Abstract: Background and aims - Cola, the second largest genus of the Malvaceac-Sterculioideae comprises 100-135 small to large tree species confined in nature to African forests, though cultivated elsewhere. Current species distribution ranges show that the genus is highly diverse in the seasonally wet forests along the Nigeria-Cameroon border, including the Korup National Park (KNP). In this paper we examine the diversity and abundance of Cola in KNP compared to other forests for which comparable data arc available. We also describe two novelties in the genus. Methods - We used inventory data from a 50-ha permanent plot in southern KNP where all Cola trees and saplings down to 1 cm in diameter were tagged, mapped and identified. Additional collections of the genus came from the 11 km trail leading to the plot. Classic herbariwn techniques and field observations were used for the morphological identification and description of specimens at MO and YA and from our personal collections. Cola species richness and abundance was estimated from the plot data and compared to other African forest sites for which comparable data arc available. The evaluation of the conservation status of the two new species described in this paper followed the IUCN Red List Categories and Criteria. Key results - Twenty-five species of Cola were identified in the southern part of the KNP, including four undescribed species, raising the total number of Cola species in Cameroon to 46. The abundance of the genus in KNP was three orders of magnitude higher than in the Rabi forest in southwestern Gabon or in the Ituri forest in eastern D.R. Congo. This high species richness and abundance suggests that KNP is part of the center of diversity of the genus. Two new species, Cola zemagoana Kenfack & D.W.Thomas and C mamboana Kenfack & Sainge are described and illustrated. Both species are only known from the lowland rainforest of southwestern Cameroon. Cola zemagoana is narrow endemic of southern KNP and its conservation status is assessed as Endangered. Cola mamboana is confined to the lowland forests of southwestern Cameroon, is locally very abundant in protected areas and is also assigned the conservation status Endangered.
Type: article
Authors: Kenfack, David; Sainge, Moses N.; Chuyong, George B.; Thomas, Duncan W.
Keywords: STRI
Abstract: Background and aims - Cola, the second largest genus of the Malvaceac-Sterculioideae comprises 100-135 small to large tree species confined in nature to African forests, though cultivated elsewhere. Current species distribution ranges show that the genus is highly diverse in the seasonally wet forests along the Nigeria-Cameroon border, including the Korup National Park (KNP). In this paper we examine the diversity and abundance of Cola in KNP compared to other forests for which comparable data arc available. We also describe two novelties in the genus. Methods - We used inventory data from a 50-ha permanent plot in southern KNP where all Cola trees and saplings down to 1 cm in diameter were tagged, mapped and identified. Additional collections of the genus came from the 11 km trail leading to the plot. Classic herbariwn techniques and field observations were used for the morphological identification and description of specimens at MO and YA and from our personal collections. Cola species richness and abundance was estimated from the plot data and compared to other African forest sites for which comparable data arc available. The evaluation of the conservation status of the two new species described in this paper followed the IUCN Red List Categories and Criteria. Key results - Twenty-five species of Cola were identified in the southern part of the KNP, including four undescribed species, raising the total number of Cola species in Cameroon to 46. The abundance of the genus in KNP was three orders of magnitude higher than in the Rabi forest in southwestern Gabon or in the Ituri forest in eastern D.R. Congo. This high species richness and abundance suggests that KNP is part of the center of diversity of the genus. Two new species, Cola zemagoana Kenfack & D.W.Thomas and C mamboana Kenfack & Sainge are described and illustrated. Both species are only known from the lowland rainforest of southwestern Cameroon. Cola zemagoana is narrow endemic of southern KNP and its conservation status is assessed as Endangered. Cola mamboana is confined to the lowland forests of southwestern Cameroon, is locally very abundant in protected areas and is also assigned the conservation status Endangered.
In Situ Reference Datasets From the TropiSAR and AfriSAR Campaigns in Support of Upcoming Spaceborne Biomass MissionsLabriere, NicolasTao, ShengliChave, JérômeScipal, KlausToan, Thuy LeAbernethy, KatharineAlonso, AlfonsoBarbier, NicolasBissiengou, PulcherieCasal, TaniaDavies, Stuart J.Ferraz, AntonioHerault, BrunoJaouen, GaelleJeffery, Kathryn J.Kenfack, DavidKorte, LisaLewis, Simon L.Malhi, YadvinderMemiaghe, Herve R.Poulsen, John R.Rejou-Mechain, MaximeVillard, LudovicVincent, GregoireWhite, Lee J. T.Saatchi, Sassan2018DOI: info:10.1109/JSTARS.2018.2851606IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing1111–112151-1535
Labriere, Nicolas, Tao, Shengli, Chave, Jérôme, Scipal, Klaus, Toan, Thuy Le, Abernethy, Katharine, Alonso, Alfonso, Barbier, Nicolas, Bissiengou, Pulcherie, Casal, Tania, Davies, Stuart J., Ferraz, Antonio, Herault, Bruno, Jaouen, Gaelle, Jeffery, Kathryn J., Kenfack, David, Korte, Lisa, Lewis, Simon L., Malhi, Yadvinder, Memiaghe, Herve R., Poulsen, John R., Rejou-Mechain, Maxime, Villard, Ludovic, Vincent, Gregoire, White, Lee J. T. et al. 2018. "In Situ Reference Datasets From the TropiSAR and AfriSAR Campaigns in Support of Upcoming Spaceborne Biomass Missions." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 1–11. https://doi.org/10.1109/JSTARS.2018.2851606
ID: 149073
Type: article
Authors: Labriere, Nicolas; Tao, Shengli; Chave, Jérôme; Scipal, Klaus; Toan, Thuy Le; Abernethy, Katharine; Alonso, Alfonso; Barbier, Nicolas; Bissiengou, Pulcherie; Casal, Tania; Davies, Stuart J.; Ferraz, Antonio; Herault, Bruno; Jaouen, Gaelle; Jeffery, Kathryn J.; Kenfack, David; Korte, Lisa; Lewis, Simon L.; Malhi, Yadvinder; Memiaghe, Herve R.; Poulsen, John R.; Rejou-Mechain, Maxime; Villard, Ludovic; Vincent, Gregoire; White, Lee J. T.; Saatchi, Sassan
Keywords: NZP
Type: article
Authors: Labriere, Nicolas; Tao, Shengli; Chave, Jérôme; Scipal, Klaus; Toan, Thuy Le; Abernethy, Katharine; Alonso, Alfonso; Barbier, Nicolas; Bissiengou, Pulcherie; Casal, Tania; Davies, Stuart J.; Ferraz, Antonio; Herault, Bruno; Jaouen, Gaelle; Jeffery, Kathryn J.; Kenfack, David; Korte, Lisa; Lewis, Simon L.; Malhi, Yadvinder; Memiaghe, Herve R.; Poulsen, John R.; Rejou-Mechain, Maxime; Villard, Ludovic; Vincent, Gregoire; White, Lee J. T.; Saatchi, Sassan
Keywords: NZP
Response to Comment on 'Plant diversity increases with the strength of negative density dependence at the global scale'LaManna, Joseph A.Mangan, Scott A.Alonso, AlfonsoBourg, Norman A.Brockelman, Warren Y.Bunyavejchewin, SarayudhChang, Li-WanChiang, Jyh-MinChuyong, George B.Clay, KeithCordell, SusanDavies, Stuart J.Furniss, Tucker J.Giardina, Christian P.Gunatilleke, I. A. U. NimalGunatilleke, C. V. SavitriHe, FangliangHowe, Robert W.Hubbell, Stephen P.Hsieh, Chang-FuInman-Narahari, Faith M.Janik, DavidJohnson, Daniel J.Kenfack, DavidKorte, LisaKral, KamilLarson, Andrew J.Lutz, James A.McMahon, Sean M.McShea, William J.Memiaghe, Herve R.Nathalang, AnuttaraNovotny, VojtechOng, Perry S.Orwig, David A.Ostertag, RebeccaParker, Geoffrey G.Phillips, Richard P.Sack, LawrenSun, I-FangTello, J. SebastianThomas, Duncan W.Turner, Benjamin L.Diaz, Dilys M. VelaVrska, TomasWeiblen, George D.Wolf, AmyYap, SandraMyers, Jonathan A.2018DOI: info:10.1126/science.aar5245Sciencev. 360No. 63910036-8075
LaManna, Joseph A., Mangan, Scott A., Alonso, Alfonso, Bourg, Norman A., Brockelman, Warren Y., Bunyavejchewin, Sarayudh, Chang, Li-Wan, Chiang, Jyh-Min, Chuyong, George B., Clay, Keith, Cordell, Susan, Davies, Stuart J., Furniss, Tucker J., Giardina, Christian P., Gunatilleke, I. A. U. Nimal, Gunatilleke, C. V. Savitri, He, Fangliang, Howe, Robert W., Hubbell, Stephen P., Hsieh, Chang-Fu, Inman-Narahari, Faith M., Janik, David, Johnson, Daniel J., Kenfack, David, Korte, Lisa et al. 2018. "Response to Comment on "Plant diversity increases with the strength of negative density dependence at the global scale"." Science 360 (6391):https://doi.org/10.1126/science.aar5245
ID: 146550
Type: article
Authors: LaManna, Joseph A.; Mangan, Scott A.; Alonso, Alfonso; Bourg, Norman A.; Brockelman, Warren Y.; Bunyavejchewin, Sarayudh; Chang, Li-Wan; Chiang, Jyh-Min; Chuyong, George B.; Clay, Keith; Cordell, Susan; Davies, Stuart J.; Furniss, Tucker J.; Giardina, Christian P.; Gunatilleke, I. A. U. Nimal; Gunatilleke, C. V. Savitri; He, Fangliang; Howe, Robert W.; Hubbell, Stephen P.; Hsieh, Chang-Fu; Inman-Narahari, Faith M.; Janik, David; Johnson, Daniel J.; Kenfack, David; Korte, Lisa; Kral, Kamil; Larson, Andrew J.; Lutz, James A.; McMahon, Sean M.; McShea, William J.; Memiaghe, Herve R.; Nathalang, Anuttara; Novotny, Vojtech; Ong, Perry S.; Orwig, David A.; Ostertag, Rebecca; Parker, Geoffrey G.; Phillips, Richard P.; Sack, Lawren; Sun, I-Fang; Tello, J. Sebastian; Thomas, Duncan W.; Turner, Benjamin L.; Diaz, Dilys M. Vela; Vrska, Tomas; Weiblen, George D.; Wolf, Amy; Yap, Sandra; Myers, Jonathan A.
Keywords: NZP; SERC; STRI; NMNH; NH-Botany
Abstract: Chisholm and Fung claim that our method of estimating conspecific negative density dependence (CNDD) in recruitment is systematically biased, and present an alternative method that shows no latitudinal pattern in CNDD. We demonstrate that their approach produces strongly biased estimates of CNDD, explaining why they do not detect a latitudinal pattern. We also address their methodological concerns using an alternative distance-weighted approach, which supports our original findings of a latitudinal gradient in CNDD and a latitudinal shift in the relationship between CNDD and species abundance.
Type: article
Authors: LaManna, Joseph A.; Mangan, Scott A.; Alonso, Alfonso; Bourg, Norman A.; Brockelman, Warren Y.; Bunyavejchewin, Sarayudh; Chang, Li-Wan; Chiang, Jyh-Min; Chuyong, George B.; Clay, Keith; Cordell, Susan; Davies, Stuart J.; Furniss, Tucker J.; Giardina, Christian P.; Gunatilleke, I. A. U. Nimal; Gunatilleke, C. V. Savitri; He, Fangliang; Howe, Robert W.; Hubbell, Stephen P.; Hsieh, Chang-Fu; Inman-Narahari, Faith M.; Janik, David; Johnson, Daniel J.; Kenfack, David; Korte, Lisa; Kral, Kamil; Larson, Andrew J.; Lutz, James A.; McMahon, Sean M.; McShea, William J.; Memiaghe, Herve R.; Nathalang, Anuttara; Novotny, Vojtech; Ong, Perry S.; Orwig, David A.; Ostertag, Rebecca; Parker, Geoffrey G.; Phillips, Richard P.; Sack, Lawren; Sun, I-Fang; Tello, J. Sebastian; Thomas, Duncan W.; Turner, Benjamin L.; Diaz, Dilys M. Vela; Vrska, Tomas; Weiblen, George D.; Wolf, Amy; Yap, Sandra; Myers, Jonathan A.
Keywords: NZP; SERC; STRI; NMNH; NH-Botany
Abstract: Chisholm and Fung claim that our method of estimating conspecific negative density dependence (CNDD) in recruitment is systematically biased, and present an alternative method that shows no latitudinal pattern in CNDD. We demonstrate that their approach produces strongly biased estimates of CNDD, explaining why they do not detect a latitudinal pattern. We also address their methodological concerns using an alternative distance-weighted approach, which supports our original findings of a latitudinal gradient in CNDD and a latitudinal shift in the relationship between CNDD and species abundance.