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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gene flow and Andean uplift shape the diversification of Gasteracantha cancriformis (Araneae: Araneidae) in Northern South America

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Salgado-Roa, Fabian C. [1, 2] ; Pardo-Diaz, Carolina [1] ; Lasso, Eloisa [2, 3] ; Arias, Carlos F. [3] ; Solferini, Vera Nisaka [4] ; Salazar, Camilo [1]
Total Authors: 6
[1] Univ Rosario, Fac Ciencias Nat & Math, Programa Biol, Cra 24 63C-69, Bogota 111221 - Colombia
[2] Univ Andes, Dept Ciencias Biol, Bogota - Colombia
[3] Smithsonian Trop Res Inst, Ancona - Italy
[4] Univ Estadual Campinas, Inst Biol, Dept Genet Evolut & Bioagents, Campinas, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: ECOLOGY AND EVOLUTION; v. 8, n. 14, p. 7131-7142, JUL 2018.
Web of Science Citations: 1

The Andean uplift has played a major role in shaping the current Neotropical biodiversity. However, in arthropods other than butterflies, little is known about how this geographic barrier has impacted species historical diversification. Here, we examined the phylogeography of the widespread color polymorphic spider Gasteracantha cancriformis to evaluate the effect of the northern Andean uplift on its divergence and assess whether its diversification occurred in the presence of gene flow. We inferred phylogenetic relationships and divergence times in G.cancriformis using mitochondrial and nuclear data from 105 individuals in northern South America. Genetic diversity, divergence, and population structure were quantified. We also compared multiple demographic scenarios for this species using a model-based approach (Phrapl) to determine divergence with or without gene flow. At last, we evaluated the association between genetic variation and color polymorphism. Both nuclear and mitochondrial data supported two well-differentiated clades, which correspond to populations occurring on opposite sides of the Eastern cordillera of the Colombian Andes. The final uplift of this cordillera was identified as the most likely force that shaped the diversification of G.cancriformis in northern South America, resulting in a cis- and trans-Andean phylogeographic structure for the species. We also found shared genetic variation between the cis- and trans-Andean clades, which is better explained by a scenario of historical divergence in the face of gene flow. This has been likely facilitated by the presence of low-elevation passes across the Eastern Colombian cordillera. Our work constitutes the first example in which the Andean uplift coupled with gene flow influenced the evolutionary history of an arachnid lineage. (AU)

FAPESP's process: 12/02526-7 - Phylogeography and populational genetic structure of spiders species (Arachnida, Araneae)
Grantee:Vera Nisaka Solferini
Support type: Regular Research Grants
FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC