Selection in space and time: Individual tree growth is adapted to tropical forest gap dynamics

Schmitt Sylvain, Tysklind Niklas, Heuertz Myriam, Herault Bruno. 2022. Selection in space and time: Individual tree growth is adapted to tropical forest gap dynamics. Molecular Ecology, 11 p.

Url - autres données associées : https://github.com/sylvainschmitt/GOING / Url - jeu de données - Entrepôt autre : https://doi.org/10.5281/zenodo.4562105 / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA706904

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Tropical forest dynamics are driven by growth and survival strategies of tree species in relation to treefall gaps; however, the ecological and evolutionary roles of intraspecific variation in the response to forest gaps remain unexplored. Here, we associated genomic data of three related tree species of the genus Symphonia in a French Guiana forest with (1) each individual tree's growth potential, and (2) with its light and competition environment estimated based on 33 years of forest monitoring in plots covering 120 ha. We show that individual trees within species have genetically determined growth strategies that are adapted to the local light and competition environments, which are shaped by the time since the last treefall. Within species, fast-growing genotypes are more frequent in light-enriched environments and slow-growing genotypes in more shaded environments. Forest gap dynamics is thus a strong selection driver that shapes adaptive strategies and maintains genetic variation within tropical tree species.

Mots-clés Agrovoc : forêt tropicale, croissance, variation génétique, écologie forestière, adaptation, accroissement forestier, forêt, écologie, sélection individuelle, arbre forestier, Symphonia, génotype, choix des espèces

Mots-clés géographiques Agrovoc : Guyane française, France

Mots-clés libres : Forest gap, Forest gap dynamics, Genotypic adaptation, Neighbourhood crowding index, Spatiotemporal selection Symphonia globulifera

Agences de financement hors UE : Université de Bordeaux, Agence Nationale de la Recherche, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Projets sur financement : (FRA) CEnter of the study of Biodiversity in Amazonia

Auteurs et affiliations

• Schmitt Sylvain, Université de Bordeaux (FRA) ORCID: 0000-0001-7759-7106 - auteur correspondant
• Tysklind Niklas, INRAE (FRA)
• Heuertz Myriam, Université de Bordeaux (FRA)
• Herault Bruno, CIRAD-ES-UPR Forêts et sociétés (FRA) ORCID: 0000-0002-6950-7286

Source : Cirad-Agritrop (https://agritrop.cirad.fr/607052/)

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