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Topography shapes the local coexistence of tree species within species complexes of Neotropical forests
- Source :
- Oecologia, Oecologia, Springer Verlag, 2021, pp.1491-1498. ⟨10.1007/s00442-021-04939-2⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- International audience; Forest inventories in Amazonia include around 5000 described tree species belonging to more than 800 genera. Numerous species-rich genera share genetic variation among species because of recent speciation and/or recurrent hybridisation, forming species complexes. Despite the key role that tree species complexes play in understanding Neotropical diversification, and their need to exploit a diversity of niches, little is known about the mechanisms that allow local coexistence of tree species complexes and their species in sympatry. In this study, we explored the fine-scale distribution of five tree species complexes and 22 species within these complexes. Combining forest inventories, botanical determination, and LiDAR-derived topographic data over 120 ha of permanent plots in French Guiana, we used a Bayesian modelling framework to test the role of fine-scale topographic wetness and tree neighbourhood on the occurrence of species complexes and the relative distribution of species within complexes. Species complexes of Neotropical trees were widely spread across the topographic wetness gradient at the local scale. Species within complexes showed pervasive niche differentiation along with topographic wetness and competition gradients. Similar patterns of species-specific habitat preferences were observed within several species complexes: species more tolerant to competition for resources grow in drier and less fertile plateaus and slopes. If supported by partial reproductive isolation of species and adaptive introgression at the species complex level, our results suggest that both species-specific habitat specialisation within species complexes and the broad ecological distribution of species complexes might explain the success of these species complexes at the regional scale.
- Subjects :
- 0106 biological sciences
Sympatry
Species complex
F40 - Écologie végétale
media_common.quotation_subject
Topographie
Species distribution
Forests
Distribution des populations
Biology
010603 evolutionary biology
01 natural sciences
Competition (biology)
Variation génétique
Enquête forestière
Species Specificity
Ecosystem
Ecology, Evolution, Behavior and Systematics
Paracou
media_common
Ecological niche
Ecology
010604 marine biology & hydrobiology
Niche differentiation
habitat specialisation
Bayes Theorem
Biodiversity
Reproductive isolation
syngameon
15. Life on land
Habitat
[SDE]Environmental Sciences
Région néotropicale
species distribution
P01 - Conservation de la nature et ressources foncières
Brazil
Population végétale
Subjects
Details
- Language :
- English
- ISSN :
- 00298549 and 14321939
- Database :
- OpenAIRE
- Journal :
- Oecologia, Oecologia, Springer Verlag, 2021, pp.1491-1498. ⟨10.1007/s00442-021-04939-2⟩
- Accession number :
- edsair.doi.dedup.....683f134f1c1781313a7dcd4ef3fd81db