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Disentangling the effects of environment and ontogeny on tree functional dimensions for congeneric species in tropical forests

Fortunel Claire, Stahl Clément, Heuret Patrick, Nicolini Eric-André, Baraloto Christopher. 2020. Disentangling the effects of environment and ontogeny on tree functional dimensions for congeneric species in tropical forests. New Phytologist, 226 (2):n.spéc. Introduction to a Virtual Issue: Current research frontiers in plant epigenetics : pp. 385-395.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Abstract : Soil water and nutrient availability are key drivers of tree species distribution and forest ecosystem functioning, with strong species differences in water and nutrient use. Despite growing evidence for intraspecific trait differences, it remains unclear under which circumstances the effects of environmental gradients trump those of ontogeny and taxonomy on important functional dimensions related to resource use, particularly in tropical forests. Here, we explore how physiological, chemical, and morphological traits related to resource use vary between life stages in four species within the genus Micropholis that is widespread in lowland Amazonia. Specifically, we evaluate how environment, developmental stage, and taxonomy contribute to single‐trait variation and multidimensional functional strategies. We find that environment, developmental stage, and taxonomy differentially contribute to functional dimensions. Habitats and seasons shape physiological and chemical traits related to water and nutrient use, whereas developmental stage and taxonomic identity impact morphological traits –especially those related to the leaf economics spectrum. Our findings suggest that combining environment, ontogeny, and taxonomy allows for a better understanding of important functional dimensions in tropical trees and highlights the need for integrating tree physiological and chemical traits with classically used morphological traits to improve predictions of tropical forests' responses to environmental change.

Mots-clés Agrovoc : Développement biologique, forêt tropicale, Physiologie végétale, Stade de développement végétal, Facteur du milieu, Facteur lié au site

Mots-clés complémentaires : Micropholis

Mots-clés libres : Chemistry, Developmental stage, Habitats, Micropholis, Morphology, Physiology, Plant traits, Seasons

Classification Agris : F60 - Plant physiology and biochemistry
K01 - Forestry - General aspects

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

Auteurs et affiliations

  • Fortunel Claire, INRA (GUF) - auteur correspondant
  • Stahl Clément, INRA (GUF)
  • Heuret Patrick, INRA (FRA)
  • Nicolini Eric-André, CIRAD-BIOS-UMR AMAP (GUF)
  • Baraloto Christopher, INRA (GUF)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596344/)

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