Amazon tree dominance across forest strata

Draper Frederick C., Costa Flávia R.C, Arellano Gabriel, Phillips Oliver L., Duque Alvaro, Macía Manuel J., Ter Steege Hans, Asner Gregory P., Berenguer Erika, Schietti Juliana, Socolar Jacob B., de Souza Fernanda Coelho, Dexter Kyle G., Jorgensen Peter M., Tello J. Sebastian, Magnusson William E, Baker Timothy R., Castilho Carolina V., Monteagudo-Mendoza Abel, Fine Paul V. A., Ruokolainen Kalle, Coronado Euridice N. Honorio, Aymard C. Gerardo A., Davila Nallarett, Sánchez Sáenz Mauricio, Rios Paredes Marcos A., Engel Julien, Fortunel Claire, Paine C. E. Timothy, Goret Jean-Yves, Dourdain Aurélie, Petronelli Pascal, et al.. 2021. Amazon tree dominance across forest strata. Nature Ecology and Evolution, 5 (6) : 757-767.

Url - jeu de données - Entrepôt autre : https://doi.org/10.5521/forestplots.net/2021_2

Quartile : Outlier, Sujet : ECOLOGY / Quartile : Outlier, Sujet : EVOLUTIONARY BIOLOGY

Résumé : The forests of Amazonia are among the most biodiverse plant communities on Earth. Given the immediate threats posed by climate and land-use change, an improved understanding of how this extraordinary biodiversity is spatially organized is urgently required to develop effective conservation strategies. Most Amazonian tree species are extremely rare but a few are common across the region. Indeed, just 227 'hyperdominant' species account for >50% of all individuals >10 cm diameter at 1.3 m in height. Yet, the degree to which the phenomenon of hyperdominance is sensitive to tree size, the extent to which the composition of dominant species changes with size class and how evolutionary history constrains tree hyperdominance, all remain unknown. Here, we use a large floristic dataset to show that, while hyperdominance is a universal phenomenon across forest strata, different species dominate the forest understory, midstory and canopy. We further find that, although species belonging to a range of phylogenetically dispersed lineages have become hyperdominant in small size classes, hyperdominants in large size classes are restricted to a few lineages. Our results demonstrate that it is essential to consider all forest strata to understand regional patterns of dominance and composition in Amazonia. More generally, through the lens of 654 hyperdominant species, we outline a tractable pathway for understanding the functioning of half of Amazonian forests across vertical strata and geographical locations.

Mots-clés Agrovoc : biodiversité, forêt, changement climatique, strate végétale, biodiversité forestière, communauté végétale, plantation forestière, politique de développement

Mots-clés géographiques Agrovoc : Amazonie

Mots-clés libres : Biodiversity, Tropical ecology

Auteurs et affiliations

• Draper Frederick C., Florida International University (USA) - auteur correspondant
• Costa Flávia R.C, INPA (BRA)
• Arellano Gabriel, University of Michigan (USA)
• Phillips Oliver L., University of Leeds (GBR)
• Duque Alvaro, Universidad Nacional de Colombia (COL)
• Macía Manuel J., UAM (ESP)
• Ter Steege Hans, Naturalis Biodiversity Center (NLD)
• Asner Gregory P., Arizona State University (USA)
• Berenguer Erika, Lancaster University (GBR)
• Schietti Juliana, INPA (BRA)
• Socolar Jacob B., Norwegian University of Life Sciences (NOR)
• de Souza Fernanda Coelho, INPA (BRA)
• Dexter Kyle G., University of Edinburgh (GBR)
• Jorgensen Peter M., Missouri Botanical Garden (USA)
• Tello J. Sebastian, Missouri Botanical Garden (USA)
• Magnusson William E, INPA (BRA)
• Baker Timothy R., University of Leeds (GBR)
• Castilho Carolina V., EMBRAPA (BRA)
• Monteagudo-Mendoza Abel, Universidad Nacional de San Antonio Abad del Cusco (PER)
• Fine Paul V. A., University of California Berkeley (USA)
• Ruokolainen Kalle, University of Turku (FIN)
• Coronado Euridice N. Honorio, IIAP (PER)
• Aymard C. Gerardo A., Herbario Universitario (VEN)
• Davila Nallarett, IIAP (PER)
• Sánchez Sáenz Mauricio, Universidad Nacional de Colombia (COL)
• Rios Paredes Marcos A., IIAP (PER)
• Engel Julien, CNRS (FRA)
• Fortunel Claire, IRD (FRA)
• Paine C. E. Timothy, University of New England (AUS)
• Goret Jean-Yves, INRA (FRA)
• Dourdain Aurélie, CIRAD-ES-UMR TETIS (FRA) ORCID: 0000-0002-6847-0434
• Petronelli Pascal, CIRAD-ES-UMR Ecofog (GUF)
• et al.

Source : Cirad-Agritrop (https://agritrop.cirad.fr/605800/)

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