Forest snail faunas from Georgian Transcaucasia : patterns of diversity in a Pleistocene refugium

Pokryszko, Beata M and Cameron, Robert A D and Mumladze, Levan and Tarkhnishvili, David (2011) Forest snail faunas from Georgian Transcaucasia : patterns of diversity in a Pleistocene refugium. Biological Journal of the Linnean Society, 102 (2). pp. 239-250.

Pokryszko et al. - 2011 - Forest snail faunas from Georgian Transcaucasia patterns of diversity in a Pleistocene refugium.pdf

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Thirty forest sites in Georgia were sampled to obtain inventories of their land snail faunas. The sites, in nine sampling areas, ranged from Batumi near the Turkish border to Lagodekhi near the Azerbaijan border, and included parts of both the Lesser and Greater Caucasus mountains and the Colchic lowlands. Abundance was generally low, and most sites held less than 20 species. Ninety species were found overall. Although sites within some sampling areas had very similar faunas, the overall levels of similarity among sites and sampling areas was low, especially when compared with similar forests from northern central Europe. Both climate and geographical position affected similarity: although these were correlated, independent effects of each were detected, and the effect of position alone was strongest. Despite this effect, most species have ranges extending into Turkey or Ciscaucasia, a few have very limited ranges, and there is no evidence of patterns of allopatric replacement among congeners. These patterns resemble those seen in faunas from forests in lower latitudes, and suggest a slow build-up of regional diversity by differentiation in situ, without the repeated restrictions to a multiplicity of small refugia that are characteristic of areas where fluctuations in aridity are important. The refugium has remained isolated, and has contributed little to the Holocene recolonization of areas further north. 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2011, , 239-250. ABSTRACT FROM AUTHOR Copyright of Biological Journal of the Linnean Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Item Type: Article
Subjects: Q Science > Conservation Biology
Q Science > Ecology
Q Science > QL Zoology
Depositing User: Dr ლევან მუმლაძე
Date Deposited: 23 Mar 2016 07:27
Last Modified: 23 Mar 2016 07:27

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