کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1354792 | 980764 | 2007 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of cliff connectivity on the genetic population structure of a rock-dwelling land snail species with frequent self-fertilization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
To examine the effect of habitat connectivity on the genetic differentiation in the frequently selfing gastropod Chondrina avenacea we assessed RAPD profiles in 12 subpopulations from continuous cliffs and in 12 subpopulations from small, naturally fragmented cliffs in the Swiss Jura mountains. Subpopulations of C. avenacea on continuous cliffs showed a smaller number of polymorphic RAPD loci and a lower gene diversity (Nei's h = 0.049) than subpopulations on fragmented cliffs (h = 0.078). Genetic distance was not correlated with geographical distance between subpopulations. GST analysis indicated strong isolation effects. Neither the number of polymorphic loci nor Nei's h was correlated with local population density. Our analysis indicates that the local population structure of C. avenacea is a combined result of frequent self-fertilization, genetic drift and low dispersal. Similar findings have been reported in studies on spatial population structure of plants. We suggest that future management actions (selective tree cutting, and controlled access of sport climbers) should also consider small, isolated limestone cliffs to preserve the genetic diversity of C. avenacea.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Systematics and Ecology - Volume 35, Issue 6, June 2007, Pages 325-333
Journal: Biochemical Systematics and Ecology - Volume 35, Issue 6, June 2007, Pages 325-333
نویسندگان
Georg F.J. Armbruster, Martin Hofer, Bruno Baur,