Family imprint reveals basin-wide patterns of Amazon forest embolism resistance

Abstract Amazon rainforests face intensifying water stress due to increases in vapour pressure deficit and changing hydrological regimes. Embolism resistance (Ψ 50 ) is a critical metric of tree survival under drought conditions, it is defined as a plant’s capacity to resist disruption of xylem wate...

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Autores principales: Julia Valentim Tavares, E. Gloor, Thiago S. F. Silva, Rafael S. Oliveira, Fernanda Coelho de Souza, Caroline Signori-Müller, Francisco Carvalho Diniz, Luciano Pereira, Martin Acosta, Martin L. Gilpin, Manuel J. Marca Zevallos, Carlos A. Salas Yupayccana, Flor M. Perez-Mullisaca, Halina Soares Jancoski, Marina Corrêa Scalon, Beatriz Schwantes Marimon, B. H. Marimon Junior, Yadvinder Malhi, Imma Oliveras Menor, Lucy Rowland, Patrick Meir, P. Bittencourt, Antônio C. L. da Costa, João Antônio R. Santos, Renata Teixeira de Oliveira, Adriane Esquivel‐Muelbert, Esteban Álvarez-Dávila, Miguel N. Alexiades, Edmar Almeida de Oliveira, Ana Cristina Segalin Andrade, Luiz Aragão, Alejandro Araujo-Murakami, Luzmila Arroyo, Gerardo Aymard, Jorcely Barroso, Damien Bonal, R. Brienen, Carlos Céron, J. L. Camargo, R. S. A. Silva, Wendeson Castro, J. Chave, James A. Comiskey, Douglas C. Daly, G. Derroire, Mathias Disney, Aurélie Dourdain, Sophie Fauset, T. R. Feldpausch, Gerardo Flores Llampazo, Bruno Hérault, Lionel Hernández, Niro Higuchi, Eurídice N. Honorio Coronado, Eliana María Jiménez-Rojas, Michelle Kalamandeen, Susan Laurance, William Laurance, S. M. Lewis, Antonio S. Lima, Abel Monteagudo‐Mendoza, Paulo S. Morandi, Percy NúñezVargas, D. Neill, W. A. Palacios, Alexander Parada Gutierrez, Guido Pardo-Molina, María Cristina Peñuela-Mora, N. Pitman, Rocio Rojas, Adriana Prieto, Maxime Réjou-Méchain, Hirma Ramírez‐Angulo, S. Ribeiro, Kalle Ruokolainen, Rafael Paiva Salomão, Julio Serrano, Rodrigo Sierra, A. R. Ruschel, M. Silveira, Hans ter Steege, J. Terborgh, Luis Valenzuela Gamarra, Rodolfo Vásquez Martinez, Ima Célia Guimarães Vieira, Emilio Vilanova Torre, Vincent Antoine Vos, Ophelia Wang, Kenneth R. Young, Robert Muscarella, Kyle G. Dexter, T. R. Baker, O. L. Phillips, Maurizio Mencuccini, D. Galbraith
Formato: Artículo
Lenguaje:inglés
Publicado: 2026
Materias:
Amazon rainforest
Amazonian
Rainforest
Phylogenetic tree
Ecology
Resistance (ecology)
Fabaceae
Geography
Brazil nut
Temperate rainforest
Biology
Abundance (ecology)
Deforestation (computer science)
Tree (set theory)
Taxon
Agroforestry
Amazon basin
Macroecology
Tropical climate
Relative species abundance
Tropics
Flood myth
Logging
Drought Resistance
Brazil
Fabaceae classification
Fabaceae physiology
Phylogeny
Trees classification
Trees physiology
Water metabolism
Xylem physiology
Droughts
Forests
Physical Sciences Environmental Science Global and Planetary Change Plant Water Relations and Carbon Dynamics
Life Sciences Agricultural and Biological Sciences Plant Science Plant responses to water stress
Physical Sciences Earth and Planetary Sciences Atmospheric Science Tree-ring climate responses
Acceso en línea:Ver en el sistema de origen
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Sumario:Abstract Amazon rainforests face intensifying water stress due to increases in vapour pressure deficit and changing hydrological regimes. Embolism resistance (Ψ 50 ) is a critical metric of tree survival under drought conditions, it is defined as a plant’s capacity to resist disruption of xylem water flow due to air bubble formation from water stress. However, measurements of Ψ 50 are only available for a limited number of Amazon locations and species. Conversely, data on forest taxonomic composition are abundant across Amazonia, and if Ψ 50 is conserved phylogenetically, these data could provide a way to scale-up drought resistance patterns. Here we evaluate Ψ 50 measurements across non-flooded Amazonian tree taxa and reveal a moderate phylogenetic signal, with phylogenetic conservatism evident at the family-level. Notably, Fabaceae is amongst the most embolism-resistant tree families in Amazonia. Leveraging the phylogenetic signal we use species composition and tree size data from 448 forest plots across Amazonia to produce a macroecological assessment of Amazonian vulnerability to embolism. The resulting estimate spatial pattern reveals that forests in the Brazilian and Guiana Shield regions, where Fabaceae abundance is high, show strong resistance to embolism. In contrast, tree communities in Western Amazonia appear more vulnerable to embolism, suggesting a reduced capacity to withstand future drought conditions.

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