SCHMITT, S.; TRUEBA, S.; COSTE, S.; DUCOURET, É.; TYSKLIND, Niklas; HEUERTZ, M.; BONAL, D.; BURBAN, B.; HÉRAULT, B.; DERROIRE, Géraldine

doi:10.1111/plb.13395

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SCHMITT, S.
Ecologie des forêts de Guyane [UMR ECOFOG]
Biodiversité, Gènes & Communautés [BioGeCo]

TRUEBA, S.
Biodiversité, Gènes & Communautés [BioGeCo]

COSTE, S.
Ecologie des forêts de Guyane [UMR ECOFOG]

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Article de revue

Ce document a été publié dans

Plant Biology. 2022-04, vol. 24, n° 3, p. 458-463

Wiley

Résumé en anglais

The dry and wet seasons in the Neotropics have strong effects on soil water and nutrient availability, as well as on forest dynamics. Despite these major effects on forest ecology, little is known on how leaf traits vary throughout the seasons in tropical rainforest trees. • Here, we investigated the influence of seasonal variations in climate and soil characteristics on leaf trait variation in two tropical tree species. We measured two leaf traits, thickness and water mass per area, in 401 individuals of two species of Symphonia (Clusiaceae) in the Paracou research station in French Guiana tropical lowland rainforest. • We found a significant effect of seasonal variation on these two leaf traits. Soil relative extractable water was a strong environmental predictor of leaf trait variation in response to seasonal variation. Reduced soil water availability during the dry season was associated with increased leaf thickness and water mass per area, possibly as a result of stomatal closure. • Our findings advocate the need to account for environmental seasonality when studying leaf traits in seasonal ecosystems such as tropical forests.< Réduire

Mots clés en anglais

Dry season

leaf thickness

leaf traits

seasonal variation

trait variability

tropical forests

DOI

http://dx.doi.org/10.1111/plb.13395

Project ANR

CEnter of the study of Biodiversity in Amazonia - ANR-10-LABX-0025

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202