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

 
论文编号:
作者: Chen YJ
刊物名称: Ecology Letters
所属学科:
论文题目英文: Hydraulic prediction of drought-induced plant dieback and top-kill depends on leaf habit and growth form
年: Aug 2021
卷: online
期:
页:
联系作者: Sterck F; Cao KF; Jansen S
收录类别:
影响因子: 9.492
参与作者:
备注:
摘要: Hydraulic 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 Nino–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.
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