Compositional response of Amazon forests to climate change

Most of the planet's diversity is concentrated in the tropics, which includes manyregions undergoing rapid climate change. Yet, while climate‐induced biodiversitychanges are widely documented elsewhere, few studies have addressed this issuefor lowland tropical ecosystems. Here we investigate whether the floristic and func-tional composition of intact lowland Amazonian forests have been changing by eval-uating records from 106 long‐term inventory plots spanning 30 years. We analysethree traits that have been hypothesized to respond to different environmental dri-vers (increase in moisture stress and atmospheric CO2concentrations): maximumtree size, biogeographic water‐deficit affiliation and wood density. Tree communitieshave become increasingly dominated by large‐statured taxa, but to date there hasbeen no detectable change in mean wood density or water deficit affiliation at thecommunity level, despite most forest plots having experienced an intensification ofthe dry season. However, among newly recruited trees, dry‐affiliated genera havebecome more abundant, while the mortality of wet‐affiliated genera has increasedin those plots where the dry season has intensified most. Thus, a slow shift to amore dry‐affiliated Amazonia is underway, with changes in compositional dynamics (recruits and mortality) consistent with climate‐change drivers, but yet to signifi-cantly impact whole‐community composition. The Amazon observational record sug-gests that the increase in atmospheric CO2is driving a shift within treecommunities to large‐statured species and that climate changes to date will impactforest composition, but long generation times of tropical trees mean that biodiver-sity change is lagging behind climate change.KEYWORDSbioclimatic niches, climate change, compositional shifts, functional traits, temporal trends,tropical forests

• Autores: Esquivel Muelbert, Adriane; Baker, Timothy R.; Dexter, Kyle G.; Lewis, Simon L.; Brienen, Roel Jacobus Wilhelmus; Feldpausch, Ted R.; Lloyd, Jonathan; Monteagudo Mendoza, Abel Lorenzo; Arroyo Padilla, Luzmila; Álvarez Dávila, Esteban; Higuchi, Niro; Schwantes Marimon, Beatriz; Marimon Junior, Ben Hur; Silveira, Marcos; Vilanova Torre, Emilio Javier; Gloor, Emanuel; Singh Malhi, Yadvinder; Chave, Jérôme; Barlow, Jos; Bonal, Damien; Dávila Cardozo, Nállarett Marina; Erwin, Terry; Fauset, Sophie; Hérault, Bruno; Laurance, Susan G. W.; Poorter, Lourens; Qie, Lan; Stahl, Clement; Sullivan, Martin J. P.; Ter Steege, Hans; Vos, Vincent Antoine; Zuidema, Pieter A.; Almeida, Everton Cristo; Oliveira, Edmar Almeida de; Andrade, Ana Cristina Segalin de; Aparecida Vieira, Simone; Aragão, Luiz Eduardo Oliveira e Cruz de; Araujo Murakami, Alejandro; Arets, Eric; Aymard Corredor, Gerardo Antonio; Baraloto, Christopher; Barbosa Camargo, Plínio; Gonçalves Barroso, Jorcely; Bongers, Frans; Boot, Rene; Campana Camargo, José Luís; Castro, Wendeson; Chama Moscoso, Victor; Comiskey, James A.; Cornejo Valverde, Fernando; Lolada Costa, Antonio Carlos; del Águila Pasquel, Jhon; Di Fiore, Anthony; Duque Barreiro, Luisa Fernanda; Duque, Luisa Fernanda; da Silva, Fernando Elías; Engel, Julien; Flores Llampazo, Gerardo Rafael; Galbraith, David; Herrera Fernández, Rafael; Honorio Coronado, Eurídice Nora; Hubau, Wannes; Jiménez Rojas, Eliana María; Nogueira Lima, Adriano José; Umetsu, Ricardo Keichi; Laurance, William F.; López González, Gabriela; Lovejoy, Thomas; Melo Cruz, Omar Aurelio; Morandi, Paulo Sérgio; Neill, David Alan; Nuñez Vargas, Mario Percy; Pallqui Camacho, ‪Nadir Carolina; Parada Gutiérrez, Alexander; Pardo Molina, Guido; Peacock, Julie; Peña Claros, Marielos; María Cristina, Peñuela Mora; Petronelli, Pascal; Pickavance, Georgia C.; Pitman, Nigel Charles Andrew; Prieto Cruz, Adriana; Quesada, Carlos Alberto; Ramírez Angulo, Hirma Coromoto; Réjou Méchain, Maxime; Restrepo Correa, Zorayda; Roopsind, Anand; Rudas Lleras, Agustín; Salomão, Rafael de Paiva; Macedo Silva, José Natalino; Silva Espejo, Javier Eduardo; Singh, James; Stropp, Juliana; Terborgh, John Whittle; Thomas Caesar, Raquel S.; Toledo, Marisol; Torres Lezama, Armando; Valenzuela Gamarra, Luis; van der Meer, Peter J.; van der Heijden, Geertje; van der Hout, Peter; Vásquez Martínez, Rodolfo; Vela, César IA; Guimarães Vieira, Ima Célia; Phillips, Oliver Lawrence
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2018
• Institución: Tecnológico de Antioquia
• Repositorio: Repositorio Tdea
• Idioma: eng
• OAI Identifier: oai:dspace.tdea.edu.co:tdea/2837
• Acceso en línea: https://dspace.tdea.edu.co/handle/tdea/2837
• Palabra clave: Biological traits; Rasgos biológicos; Frait biologique; Tropical forests; Bosques tropicales; Floresta tropical; Forêt tropicale; Climate Change; Cambio Climático; Mudança Climática; Changement climatique; Bioclimatic niches; Compositional shifts; Functional traits; Temporal trends
• Rights: openAccess
• License: https://creativecommons.org/licenses/by/4.0/