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A catastrophic tropical drought kills hydraulically vulnerable tree species.

Powers, JS, Vargas-G, G, Brodribb, TJ, Schwartz, NB, Perez-Aviles, D, Smith-Martin, CM, Becknell, JM, Aureli, F, Blanco, R, Calderón-Morales, E, Calvo-Alvarado, JC, Calvo-Obando, AJ, Chavarría, MM, Carvajal-Vanegas, D, Dionisio Jiménez-Rodríguez, C, Murillo Chacon, E, Schaffner, CM, Werden, LK, Xu, X and Medvigy, D (2020) A catastrophic tropical drought kills hydraulically vulnerable tree species. Global Change Biology. ISSN 1354-1013

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Abstract

Drought-related tree mortality is now a widespread phenomenon predicted to increase in magnitude with climate change. However, the patterns of which species and trees are most vulnerable to drought, and the underlying mechanisms have remained elusive, in part due to the lack of relevant data and difficulty of predicting the location of catastrophic drought years in advance. We used long-term demographic records and extensive databases of functional traits and distribution patterns to understand the responses of 20 to 53 species to an extreme drought in a seasonally dry tropical forest in Costa Rica, which occurred during the 2015 El Niño Southern Oscillation event. Overall, species-specific mortality rates during the drought ranged from 0% to 34%, and varied little as a function of tree size. By contrast, hydraulic safety margins correlated well with probability of mortality among species, while morphological or leaf economics spectrum traits did not. This firmly suggests hydraulic traits as targets for future research.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Powers, J.S., Vargas‐G, G., Brodribb, T.J., Schwartz, N.B., Perez‐Aviles, D., Smith‐Martin, C.M., Becknell, J.M., Aureli, F., Blanco, R., Calderón‐Morales, E., Calvo‐Alvarado, J.C., Calvo‐Obando, A.J., Chavarría, M.M., Carvajal‐Vanegas, D., Dionisio Jiménez‐Rodríguez, C., Murillo Chacon, E., Schaffner, C.M., Werden, L.K., Xu, X. and Medvigy, D. (2020), A catastrophic tropical drought kills hydraulically vulnerable tree species. Glob Change Biol. Accepted Author Manuscript, which has been published in final form at http://dx.doi.org/10.1111/gcb.15037. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Uncontrolled Keywords: 06 Biological Sciences, 05 Environmental Sciences
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
S Agriculture > SD Forestry
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Wiley
Related URLs:
Date Deposited: 17 Mar 2020 10:24
Last Modified: 17 Mar 2020 10:30
DOI or Identification number: 10.1111/gcb.15037
URI: http://researchonline.ljmu.ac.uk/id/eprint/12512

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