TY  - JOUR
A1  - Pfenninger, Markus
A1  - Bahl, Andreas
A1  - Streit, Bruno
T1  - Isolation by distance in a population of a small land snail Trochoidea geyeri : evidence from direct and indirect methods
T2  - Proceedings of the Royal Society of London. Series B, Biological sciences
N2  - 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.
Y1  - 2006
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/1905
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-34972
SN  - 1471-2954
SN  - 0950-1193
SN  - 0080-4649
SN  - 0962-8452
VL  - 263
IS  - 1374
SP  - 1211
EP  - 1217
PB  - The Royal Society
CY  - London
ER  -