Seasonal variation of leaf thickness : An overlooked component of functional trait variability

Schmitt Sylvain, Trueba Santiago, Coste Sabrina, Ducouret Emilie, Tysklind Niklas, Heuertz Myriam, Bonal Damien, Burban Benoit, Herault Bruno, Derroire Géraldine. 2022. Seasonal variation of leaf thickness : An overlooked component of functional trait variability. Plant Biology, 24 (3) : 458-463.

https://doi.org/10.1111/plb.13395

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Url - jeu de données - Entrepôt autre : https://doi. org/10.17871/TRY.63

Résumé : 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.

Mots-clés géographiques Agrovoc : Guyane française, France

Mots-clés libres : Dry season, Leaf thickness, Leaf traits, Seasonal variation, Trait variability, Tropical forest

Classification Agris : F50 - Anatomie et morphologie des plantes
F60 - Physiologie et biochimie végétale

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

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