Does niche divergence accompany allopatric divergence in Aphelocoma jays as predicted under ecological speciation? Insights from tests with niche models

Evolution; International Journal of Organic Evolution
John E McCormackL Lacey Knowles

Abstract

The role of ecology in the origin of species has been the subject of long-standing interest to evolutionary biologists. New sources of spatially explicit ecological data allow for large-scale tests of whether speciation is associated with niche divergence or whether closely related species tend to be similar ecologically (niche conservatism). Because of the confounding effects of spatial autocorrelation of environmental variables, we generate null expectations for niche divergence for both an ecological-niche modeling and a multivariate approach to address the question: do allopatrically distributed taxa occupy similar niches? In a classic system for the study of niche evolution--the Aphelocoma jays--we show that there is little evidence for niche divergence among Mexican Jay (A. ultramarina) lineages in the process of speciation, contrary to previous results. In contrast, Aphelocoma species that exist in partial sympatry in some regions show evidence for niche divergence. Our approach is widely applicable to the many cases of allopatric lineages in the beginning stages of speciation. These results do not support an ecological speciation model for Mexican Jay lineages because, in most cases, the allopatric environments they occ...Continue Reading

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Citations

Jun 8, 2010·BMC Evolutionary Biology·Katie S Costanzo, Derek J Taylor
Dec 2, 2011·BMC Evolutionary Biology·Patrick S FitzeRafael Zardoya
Dec 30, 2011·PLoS Biology·Chris WoodSteve Kelling
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May 29, 2018·Journal of Evolutionary Biology·Vicente García-Navas, Michael Westerman
Dec 27, 2018·The New Phytologist·Javier López-JuradoFrancisco Balao
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Aug 1, 2020·Frontiers in Plant Science·Maria Clara ArteagaJaime Gasca-Pineda
May 16, 2019·Proceedings of the National Academy of Sciences of the United States of America·Ryan A FolkRobert P Guralnick

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