Abstract
The molluscan fauna of Duddingston Loch, Edinburgh, Scotland and surrounding areas has been studied in recent years, and compared with earlier reports, particularly that of D.K. Kevan in 1929–1930. Ten freshwater mollusc species that were recorded in the past have not been found in recent years, while other species have arrived and flourished. Reasons for such changes may include adverse effects of algal blooms and the introduction of certain fish. The terrestrial mollusc fauna in the Duddingston Loch area has not changed in the same way, but several alien species that have become widespread in the Edinburgh area and in Scotland generally have also appeared here. As a result, a total of 76 species of mollusc has been recorded in the Duddingston Loch area, making this one of the richest sites for molluscs in Scotland.
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