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Effect of cliff connectivity on the genetic population structure of a rock-dwelling land snail species with frequent self-fertilization

Armbruster, Georg F. J. and Hofer, Martin and Baur, Bruno. (2007) Effect of cliff connectivity on the genetic population structure of a rock-dwelling land snail species with frequent self-fertilization. Biochemical systematics and ecology, Vol. 35, H. 6. pp. 325-333.

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Official URL: http://edoc.unibas.ch/dok/A5248975

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Abstract

To examine the effect of habitat connectivity on the genetic differentiation in the frequently selling 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. (C) 2006 Elsevier Ltd. All rights reserved. Schneckenfauna im Nordwestschweizer Jura
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Naturschutzbiologie (Baur)
UniBasel Contributors:Baur, Bruno
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Pergamon Press
ISSN:0305-1978
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:28
Deposited On:22 Mar 2012 14:03

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