Artículo
Limited intraspecific variation in drought resistance along a pronounced tropical rainfall gradient
Autor/es | Comita, Liza S.
Jones, F. Andrew Manzané-Pinzón, Eric J. Álvarez Cansino, Leonor Cerón-Souza, Ivania Contreras, Blexein Engelbrecht, Bettina M. J. |
Departamento | Universidad de Sevilla. Departamento de Biología Vegetal y Ecología |
Fecha de publicación | 2024-05-29 |
Fecha de depósito | 2024-06-05 |
Publicado en |
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Resumen | Assessing within- species variation in response to drought is crucial for predicting species’ responses to climate change and informing restoration and conservation efforts, yet experimental data are lacking for the vast ... Assessing within- species variation in response to drought is crucial for predicting species’ responses to climate change and informing restoration and conservation efforts, yet experimental data are lacking for the vast majority of tropical tree species. We assessed intraspecific variation in response to water availability across a strong rainfall gradient for 16 tropical tree species using reciprocal transplant and common garden field experi-ments, along with measurements of gene flow and key functional traits linked to drought resistance. Although drought resistance varies widely among species in these forests, we found little evidence for within- species variation in drought resistance. For the majority of functional traits measured, we detected no significant intraspecific variation. The few traits that did vary significantly between drier and wetter origins of the same species all showed relationships opposite to expectations based on drought stress. Furthermore, seedlings of the same species originating from drier and wetter sites performed equally well under drought conditions in the common garden experiment and at the driest transplant site. However, contrary to expectation, wetter- origin seedlings survived better than drier- origin seedlings under wetter conditions in both the reciprocal transplant and common garden experiment, potentially due to lower insect herbivory. Our study provides the most comprehensive picture to date of intraspecific variation in tropical tree species’ responses to water availability. Our findings suggest that while drought plays an important role in shaping species composition across moist tropical forests, its influence on within- species variation is limited. |
Agencias financiadoras | National Science Foundation (NSF). United States |
Identificador del proyecto | NSF 1464866
NSF 1257976 NSF 1623775 NSF 1845403 |
Cita | Comita, L.S., Jones, F.A., Manzané-Pinzón, E.J., Álvarez Cansino, L., Cerón-Souza, I., Contreras, B. y Engelbrecht, B.M.J. (2024). Limited intraspecific variation in drought resistance along a pronounced tropical rainfall gradient. Proceedings of the National Academy of Sciences (PNAS), 121 (23), e316971121. https://doi.org/10.1073/pnas.2316971121. |
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