Hydraulic prediction of drought-induced plant dieback and top-kill depends on leaf habit and growth form.
dieback and mortality
drought tolerance
embolism
hydraulic failure
hydraulic safety margin
leaf turgor loss point
liana
top-kill
tropical savanna
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Nov 2021
Nov 2021
Historique:
revised:
19
04
2021
received:
11
05
2020
accepted:
11
07
2021
pubmed:
20
8
2021
medline:
12
10
2021
entrez:
19
8
2021
Statut:
ppublish
Résumé
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 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.
Substances chimiques
Water
059QF0KO0R
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
2350-2363Subventions
Organisme : National Natural Science Foundation of China
ID : 41861144016
Organisme : National Natural Science Foundation of China
ID : 31570406
Organisme : National Natural Science Foundation of China
ID : 32071735
Organisme : National Natural Science Foundation of China
ID : 31861133008
Organisme : 'Light of West China' and Youth Innovation Promotion Association Program of the Chinese Academy of Sciences
Organisme : Yunnan Provincial Science and Technology Department
ID : 2018HB068
Informations de copyright
© 2021 John Wiley & Sons Ltd.
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