Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Retrospective Theses and Dissertations

Environmental Sciences

1998

Zoology and genetics

Articles 1 - 1 of 1

Full-Text Articles in Life Sciences

Gene Flow At A Snail's Pace: Phylogeography And Conservation Genetics Of Relict Populations Of The Iowa Pleistocene Snail , Tamara Kay Ross Jan 1998

Gene Flow At A Snail's Pace: Phylogeography And Conservation Genetics Of Relict Populations Of The Iowa Pleistocene Snail , Tamara Kay Ross

Retrospective Theses and Dissertations

The Iowa Pleistocene snail, Discus macclintocki, is a federally endangered land snail found only in northeast Iowa and northwestern Illinois. This species is believed to be a glacial relict with populations isolated for the last 16,000 years. In this study, I investigated the amount of genetic variation within, and the gene flow among, ten isolated populations of the Iowa Pleistocene snail, Discus macclintocki (Baker). I sequenced part of the 16s region of the mitochondrial DNA from 175 snails. Populations clustered clearly by watershed, suggesting that flooding events may have been the historical avenue of gene flow rather than overland ...