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Wiley, Ecology Letters, 11(24), p. 2350-2363, 2021

DOI: 10.1111/ele.13856

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Hydraulic prediction of drought‐induced plant dieback and top‐kill depends on leaf habit and growth form

Journal article published in 2021 by Ya‐Jun Chen ORCID, Brendan Choat ORCID, Frank Sterck ORCID, Phisamai Maenpuen ORCID, Masatoshi Katabuchi ORCID, Shu‐Bin Zhang ORCID, Kyle W. Tomlinson ORCID, Rafael S. Oliveira ORCID, Yong‐Jiang Zhang ORCID, Jing‐Xian Shen, Kun‐Fang Cao ORCID, Steven Jansen ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractHydraulic failure caused by severe drought contributes to aboveground dieback and whole‐plant death. The extent to which dieback or whole‐plant death can be predicted by plant hydraulic traits has rarely been tested among species with different leaf habits and/or growth forms. We investigated 19 hydraulic traits in 40 woody species in a tropical savanna and their potential correlations with drought response during an extreme drought event during the El Niño–Southern Oscillation in 2015. Plant hydraulic trait variation was partitioned substantially by leaf habit but not growth form along a trade‐off axis between traits that support drought tolerance versus avoidance. Semi‐deciduous species and shrubs had the highest branch dieback and top‐kill (complete aboveground death) among the leaf habits or growth forms. Dieback and top‐kill were well explained by combining hydraulic traits with leaf habit and growth form, suggesting integrating life history traits with hydraulic traits will yield better predictions.