1. Geographic patterns of genetic subdivision in the cellar spider Pholcus phalangioides (Araneae)
- Author
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Schafer, Martin A., Hille, Axel, and Uhl, Gabriele B.
- Subjects
Heredity -- Research ,Isoenzymes -- Observations ,Animals -- Dispersal ,Biogeography -- Research ,Spiders -- Genetic aspects ,Population genetics -- Research ,Biological sciences - Abstract
The cellar spider Pholcus phalangioides (Araneae) has been studied relative to geographic patterns of genetic subdivision. Geographical patterns of gene flow and drift were analyzed. Significant two-locus disequilibria were seen. a recent reduction in the effective population size was found in six sites. Five variable allozyme loci had significant interpopulation subdivision and isolation by distance over the area studied. on a regional scale significant differentiation was found but the genetic pattern did not correlate with distance. Results suggest a high potential of dispersal and strong effects of drift within small, demographically unstable mating units seem to cause significant, but unpredictable, genetic differentiation patterns at lower geographical scales. Sampling was from 23 subpopulations in five urban regions.
- Published
- 2001