RRC ID 68782
Author Thom G, Gehara M, Smith BT, Miyaki CY, do Amaral FR.
Title Microevolutionary dynamics show tropical valleys are deeper for montane birds of the Atlantic Forest.
Journal Nat Commun
Abstract Tropical mountains hold more biodiversity than their temperate counterparts, and this disparity is often associated with the latitudinal climatic gradient. However, distinguishing the impact of latitude versus the background effects of species history and traits is challenging due to the evolutionary distance between tropical and temperate assemblages. Here, we test whether microevolutionary processes are linked to environmental variation across a sharp latitudinal transition in 21 montane birds of the southern Atlantic Forest in Brazil. We find that effective dispersal within populations in the tropical mountains is lower and genomic differentiation is better predicted by the current environmental complexity of the region than within the subtropical populations. The concordant response of multiple co-occurring populations is consistent with spatial climatic variability as a major process driving population differentiation. Our results provide evidence for how a narrow latitudinal gradient can shape microevolutionary processes and contribute to broader scale biodiversity patterns.
Volume 12(1)
Pages 6269
Published 2021-11-1
DOI 10.1038/s41467-021-26537-9
PII 10.1038/s41467-021-26537-9
PMID 34725329
Resource
GBIF Fungal Specimens of National Museum of Nature and Science (TNS)