Type

Report

Authors

E. Regan
I. J. Killeen
R. Anderson
E. A. Moorkens
Andrew W. Byrne

Subjects

Environment

Topics
water quality south west ireland northern ireland irish population marine molluscs climate change molluscs red list

Ireland Red List No. 2 : Non-marine molluscs (2009)

Abstract Based on almost 80,000 records for Ireland, 150 native species of non-marine mollusc are evaluated fortheir conservation status using International Union for the Conservation of Nature (IUCN) criteria(IUCN, 2001, 2003). Two are considered to be regionally extinct, five critically endangered, fourteenendangered, twenty-six vulnerable, six near threatened, and the rest of least concern, or data deficient.Ireland’s non-marine molluscan fauna is of international importance. Ten species have populations ofsignificant international worth, having large proportions of their global population in Ireland.Ashfordia granulata and Leisotyla anglica are two examples of such species; both are near endemics toBritain and Ireland, with Ireland having at least a fifth of their global populations. Seven species havebeen listed on the global IUCN red list, for example Myxas glutinosa and Quickella arenaria, both ofwhich are endangered species in Ireland. Six species are legally protected under European legislation.Of these legally protected species, only the Kerry slug, Geomalacus maculosus, is not consideredthreatened in Ireland. However, the Irish population of this species is of particular internationalimportance as the species is restricted to south-west Ireland and northern Iberia, and the Iberianpopulations are severely threatened.Some species are rare in Ireland as they are at the edge of their range or climatic tolerances (e.g.Pomatias elegans). For species that are declining in Ireland there are multiple drivers of population loss.Species declines are primarily driven by habitat loss (e.g. loss of marginal agricultural wetlandsthrough drainage impacting species such as Vertigo antivertigo), habitat change (e.g. reduced waterquality impacting species such as Pisidium pseudosphaerium and Margaritifera margaritifera) and habitatmanagement (e.g. woodland management practices impacting species such as Spermodea lamellata). Toa lesser extent species may be declining due to climate change (e.g. Pisidium conventus, a cold, deepwater, montane species) and the impact of invasive species (Anodonta cygnea and A. anatina, the swanand duck mussels, are being severely impacted by the invasive species Dreissena polymorpha, the zebramussel).The importance of water quality and the reduction of habitat loss and change across a spectrum ofhabitats are identified as important components in conserving the non-marine molluscan fauna on theisland of Ireland.
Collections Ireland -> University College Dublin -> Veterinary Medicine Research Collection (superseded in 2015)
Ireland -> University College Dublin -> College of Agriculture, Food Science and Veterinary Medicine (superseded in 2015)
Ireland -> University College Dublin -> School of Veterinary Medicine (superseded in 2015)

Full list of authors on original publication

E. Regan, I. J. Killeen, R. Anderson, E. A. Moorkens, Andrew W. Byrne

Experts in our system

1
E. C. Regan
Trinity College Dublin
Total Publications: 5
 
2
Andrew W. Byrne
University College Dublin
Total Publications: 16