Isolation by distance in a population of a small land snail Trochoidea geyeri : evidence from direct and indirect methods

  • Population structure was estimated in a continuous population of a small land snail (Trochoidea geyeri). Mark-recapture experiments and randomly amplified polymorphic DNA analyses indicate that the population structure can be described by the isolation by distance model of Wright (1946). Estimates of density and dispersal suggest a neighbourhood size of 70-208 individuals on an area of 13-21 m². A principal component analysis of the randomly amplified polymorphic DNA data reveals clinal variation of genetic composition across the population, as predicted by the neighbourhood concept. An analysis of molecular variance indicates substantial genetic structuring. Comparisons of the genetic distances, expressed as euclidean distances among individuals, versus the geographic distance between sampling sites yield a highly significant positive correlation (Mantel test: r = 0.567, p<0.0001). The revealed pattern of populational subdivision on a microgeographic scale seems to be one of the principal processes generating and maintaining genetic diversity within populations of small land gastropods.

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Author:Markus PfenningerORCiDGND, Andreas Bahl, Bruno StreitGND
Parent Title (English):Proceedings of the Royal Society of London. Series B, Biological sciences
Publisher:The Royal Society
Place of publication:London
Document Type:Article
Date of Publication (online):2006/12/11
Year of first Publication:1996
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/12/11
Page Number:7
First Page:1211
Last Page:1217
Source:Proceedings: Biological Sciences, Vol. 263, No. 1374. (Sep. 22, 1996), pp. 1211-1217
Institutes:Biowissenschaften / Institut für Ökologie, Evolution und Diversität
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Licence (German):License LogoDeutsches Urheberrecht