Climatic niche shift after range expansion of Eustachys (Poaceae)

Eustachys presents lower diversity in the Old World than in the Neotropics and it occurs disjunctly between main tropical regions. This qualifies Eustachys as a good model to test whether lineages expand their niches during the process of range expansion. We performed ancestral range reconstruction,...

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Bibliographic Details
Published in:Anais da Academia Brasileira de Ciências 2024-01, Vol.96 (3), p.e20220414
Main Authors: Paiva, Maria Izabel S DE Lima, Amorim, Bruno S, Albuquerque, Patrícia M, Maciel, Jefferson R
Format: Article
Language:English
Subjects:
Biodiversity
biogeography
Biological Evolution
Climate
disjunction
dispersal
ecological opportunities
Ecosystem
grass
MULTIDISCIPLINARY SCIENCES
Phylogeny
Poaceae - classification
Poaceae - genetics
South America
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Summary:Eustachys presents lower diversity in the Old World than in the Neotropics and it occurs disjunctly between main tropical regions. This qualifies Eustachys as a good model to test whether lineages expand their niches during the process of range expansion. We performed ancestral range reconstruction, compared environmental spaces of the different geographic areas and assessed bioclimatic trait evolution. Ancestral range reconstruction indicated that most speciation in Eustachys occurred in the South America. Ancestral climatic niches of the New World are different from those of African and Australasia lineages. Our results show that Eustachys experienced niche expansion when it reached the New World. Evolutionary history of Eustachys illustrates how the range expansion promoted climatic niche shifts, which could drive unbalanced species richness of the genus among different tropical regions.
ISSN:1678-2690
1678-2690
DOI:10.1590/0001-3765202420220414