Genomic and niche divergence in an Amazonian palm species complex
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Genomic and niche divergence in an Amazonian palm species complex. / Bacon, Christine D.; Roncal, Julissa; Andermann, Tobias; Barnes, Christopher J.; Balslev, Henrik; Gutiérrez-Pinto, Natalia; Morales, Hernán; Núñez-Avelleneda, Luis Alberto; Tunarosa, Natalia; Antonelli, Alexandre.
In: Botanical Journal of the Linnean Society, Vol. 197, No. 4, 2021, p. 498-512.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Genomic and niche divergence in an Amazonian palm species complex
AU - Bacon, Christine D.
AU - Roncal, Julissa
AU - Andermann, Tobias
AU - Barnes, Christopher J.
AU - Balslev, Henrik
AU - Gutiérrez-Pinto, Natalia
AU - Morales, Hernán
AU - Núñez-Avelleneda, Luis Alberto
AU - Tunarosa, Natalia
AU - Antonelli, Alexandre
N1 - Publisher Copyright: © 2021 The Linnean Society of London, Botanical Journal of the Linnean Society.
PY - 2021
Y1 - 2021
N2 - Environmental heterogeneity across the landscape can cause lineage divergence and speciation. The Geonoma macrostachys (Arecaceae) species complex has been proposed as a candidate case of ecological speciation in Amazonia due to evidence of habitat partitioning and pre-zygotic reproductive barriers between co-occurring morphotypes at a local scale. In this study, we provide a continent-wide perspective of the divergence patterns in G. macrostachys by integrating data from morphological traits, target sequence capture, climate, soil and reproductive biology. A morphometric analysis revealed four morphogroups, defined by traits related to leaf shape. A coalescence-based phylogenetic analysis did not recover the morphogroups as monophyletic, indicating independent evolution of leaf shape across geographical space. We demonstrate scale-dependent habitat differentiation for two of the morphogroups, in which segregation driven mostly by climate was complete at the regional scale but incomplete at the continental scale. Contrary to previous evidence of reproductive isolation in the form of different pollinators and flowering times between sympatric G. macrostachys forms in Peru and Ecuador, these were not found in Colombia, suggesting reproductive barriers have evolved multiple times across its geographical range. Taken together, our findings suggest that ecological divergence and local adaptation is driving diversification in G. macrostachys, and that hyperdiverse regions such as Amazonia are probable arenas for ecological divergence in sympatry.
AB - Environmental heterogeneity across the landscape can cause lineage divergence and speciation. The Geonoma macrostachys (Arecaceae) species complex has been proposed as a candidate case of ecological speciation in Amazonia due to evidence of habitat partitioning and pre-zygotic reproductive barriers between co-occurring morphotypes at a local scale. In this study, we provide a continent-wide perspective of the divergence patterns in G. macrostachys by integrating data from morphological traits, target sequence capture, climate, soil and reproductive biology. A morphometric analysis revealed four morphogroups, defined by traits related to leaf shape. A coalescence-based phylogenetic analysis did not recover the morphogroups as monophyletic, indicating independent evolution of leaf shape across geographical space. We demonstrate scale-dependent habitat differentiation for two of the morphogroups, in which segregation driven mostly by climate was complete at the regional scale but incomplete at the continental scale. Contrary to previous evidence of reproductive isolation in the form of different pollinators and flowering times between sympatric G. macrostachys forms in Peru and Ecuador, these were not found in Colombia, suggesting reproductive barriers have evolved multiple times across its geographical range. Taken together, our findings suggest that ecological divergence and local adaptation is driving diversification in G. macrostachys, and that hyperdiverse regions such as Amazonia are probable arenas for ecological divergence in sympatry.
KW - Arecaceae
KW - climate
KW - coalescence
KW - ecological divergence
KW - habitat differentiation
KW - morphometrics
KW - pollinators
KW - pre-zygotic reproductive barriers
KW - soil
KW - target sequence capture
U2 - 10.1093/botlinnean/boab012
DO - 10.1093/botlinnean/boab012
M3 - Journal article
AN - SCOPUS:85118831158
VL - 197
SP - 498
EP - 512
JO - Botanical Journal of the Linnean Society
JF - Botanical Journal of the Linnean Society
SN - 0024-4074
IS - 4
ER -
ID: 288272960