Topography drives microgeographic adaptations of closely related species in two tropical tree species complexes

Schmitt Sylvain, Tysklind Niklas, Herault Bruno, Heuertz Myriam. 2021. Topography drives microgeographic adaptations of closely related species in two tropical tree species complexes. Molecular Ecology, 30 (20) : 5080-5093.

Url - jeu de données - Entrepôt autre : https://zenodo.org/record/4727831#.YeWHIfjjLIU / Url - autres données associées : https://github.com/sylvainschmitt/PhD / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA706904

Quartile : Q1, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY / Quartile : Q1, Sujet : ECOLOGY / Quartile : Q1, Sujet : EVOLUTIONARY BIOLOGY

Liste HCERES des revues (en SHS) : oui

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

Résumé : Closely related tree species that grow in sympatry are abundant in rainforests. However, little is known of the ecoevolutionary processes that govern their niches and local coexistence. We assessed genetic species delimitation in closely related sympatric species belonging to two Neotropical tree species complexes and investigated their genomic adaptation to a fine-scale topographic gradient with associated edaphic and hydrologic features. Combining LiDAR-derived topography, tree inventories, and single nucleotide polymorphisms (SNPs) from gene capture experiments, we explored genome-wide population genetic structure, covariation of environmental variables, and genotype-environment association to assess microgeographic adaptations to topography within the species complexes Symphonia (Clusiaceae), and Eschweilera (Lecythidaceae) with three species per complex and 385 and 257 individuals genotyped, respectively. Within species complexes, closely related tree species had different realized optima for topographic niches defined through the topographic wetness index or the relative elevation, and species displayed genetic signatures of adaptations to these niches. Symphonia species were genetically differentiated along water and nutrient distribution particularly in genes responding to water deprivation, whereas Eschweilera species were genetically differentiated according to soil chemistry. Our results suggest that varied topography represents a powerful driver of processes modulating tropical forest biodiversity with differential adaptations that stabilize local coexistence of closely related tree species.

Mots-clés Agrovoc : forêt tropicale humide, Symphonia, variation génétique, polymorphisme génétique, topographie, Lecythidaceae, chimie du sol, écologie forestière, adaptation, dynamique des populations, biodiversité, génétique des populations, produit forestier non ligneux

Mots-clés géographiques Agrovoc : France, Guyane française

Mots-clés libres : Ecological niche, French Guiana, Relative elevation, Species coexistence, Syngameon, Topographic wetness index, Tropical forests

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

Auteurs et affiliations

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

Source : Cirad-Agritrop (https://agritrop.cirad.fr/600031/)

Métriques

[ Page générée et mise en cache le 2024-12-18 ]