期刊
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
卷 107, 期 1, 页码 95-111出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1095-8312.2012.01911.x
关键词
comparative phylogeography; North America; population expansion; population genetics; Sierra Nevada; speciation
资金
- Yosemite Fund [NPS J8C07070002]
- National Science Foundation [OISE-0965038]
- White Mountain Research Station
- Magy Fellowship
- Walker Fund
- Sequoia and Kings National Parks [SEKI-0091]
- Yosemite National Park [YOSE-00093]
- California Fish and Game Department [SC-006997]
- Office Of The Director
- Office Of Internatl Science &Engineering [0965038] Funding Source: National Science Foundation
Alpine species often have similar demographic responses to Pleistocene climate changes, but exhibit different spatial patterns of genetic diversity. Using a comparative phylogeographical approach, we examined the factors influencing lineage formation in three alpine carabid beetles of the genus Nebria Latreille inhabiting the California Sierra Nevada. These flightless beetles differ in altitudinal zonation and habitat preferences, but overlap spatially, have limited dispersal capacities and share life history characteristics. Species distribution modelling predicted decreasing population connectivity in relation to increasing altitudinal preferences. Diversity patterns at the cytochrome oxidase subunit I gene revealed northsouth genetic structure and recent population growth in all three species. The high-elevation-restricted species, Nebria ingens Horn, exhibited a deep phylogeographical split, morphological divergence and evidence of limited, unidirectional gene flow towards the south. This was supported by additional data from three nuclear genes and isolation with migration analysis. Nebria spatulata Van Dyke, inhabiting an intermediate altitudinal range, exhibited fixed morphological differences between northern and southern populations, but showed limited structure. The broadly distributed Nebria ovipennis LeConte showed less structure and lacked morphological variation. Diversification of these Nebria species supports the role of altitudinal zonation in lineage formation and is consistent with the Pleistocene species pump model. (c) 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, 107, 95-111.
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