Phylogeographic structure of the dunes sagebrush lizard, an endemic habitat specialist.

Autor: Chan LM; Department of Biology, Pacific University, Forest Grove, Oregon, United States of America., Painter CW; Endangered Species Program, New Mexico Department of Game and Fish, Santa Fe, New Mexico, United States of America., Hill MT; Albuquerque, New Mexico, United States of America., Hibbitts TJ; Department of Ecology and Conservation Biology, Biodiversity Research and Teaching Collections, Texas A&M University, College Station, Texas, United States of America.; Natural Resources Institute, Texas A&M University, College Station, Texas, United States of America., Leavitt DJ; Natural Resources Program, Naval Facilities Engineering Command South West, San Diego, California, United States of America., Ryberg WA; Natural Resources Institute, Texas A&M University, College Station, Texas, United States of America., Walkup D; Natural Resources Institute, Texas A&M University, College Station, Texas, United States of America., Fitzgerald LA; Department of Ecology and Conservation Biology, Biodiversity Research and Teaching Collections, Texas A&M University, College Station, Texas, United States of America.; EEB PhD Program, Texas A&M University, College Station, Texas, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2020 Sep 16; Vol. 15 (9), pp. e0238194. Date of Electronic Publication: 2020 Sep 16 (Print Publication: 2020).
DOI: 10.1371/journal.pone.0238194
Abstrakt: Phylogeographic divergence and population genetic diversity within species reflect the impacts of habitat connectivity, demographics, and landscape level processes in both the recent and distant past. Characterizing patterns of differentiation across the geographic range of a species provides insight on the roles of organismal and environmental traits in evolutionary divergence and future population persistence. This is particularly true of habitat specialists where habitat availability and resource dependence may result in pronounced genetic structure as well as increased population vulnerability. We use DNA sequence data as well as microsatellite genotypes to estimate range-wide phylogeographic divergence, historical population connectivity, and historical demographics in an endemic habitat specialist, the dunes sagebrush lizard (Sceloporus arenicolus). This species is found exclusively in dune blowouts and patches of open sand within the shinnery oak-sand dune ecosystem of southeastern New Mexico and adjacent Texas. We find evidence of phylogeographic structure consistent with breaks and constrictions in suitable habitat at the range-wide scale. In addition, we find support for a dynamic and variable evolutionary history across the range of S. arenicolus. Populations in the Monahans Sandhills have deeply divergent lineages consistent with long-term demographic stability. In contrast, populations in the Mescalero Sands are not highly differentiated, though we do find evidence of demographic expansion in some regions and relative demographic stability in others. Phylogeographic history and population genetic differentiation in this species has been shaped by the configuration of habitat patches within a geologically complex and historically dynamic landscape. Our findings identify regions as genetically distinctive conservation units as well as underscore the genetic and demographic history of different lineages of S. arenicolus.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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