@article {Waterston2011, title = {The macrofauna of brackish and fresh waters of the Loch Druidibeg National Nature Reserve and its neighbourhood, South Uist}, journal = {Proc. R. Soc. Edinburgh. Sect. B. Biol. Sci.}, volume = {77}, year = {2011}, month = {dec}, pages = {353{\textendash}376}, publisher = {Cambridge University Press}, abstract = {

The macrofauna of brackish and fresh waters of the Loch Druidibeg National Nature Reserve and its neighbourhood, South UistThree main types of Hebridean freshwater lochs occur in the Loch Druidibeg National Nature Reserve; eutrophic calcareous machair lochs near the Atlantic coast, mesotrophic lochs on the edge of the moor and oligotrophic lochs on the peatlands. Chloride/calcium concentrations, highest in lochs near the sea, fall away rapidly inland and are lowest in the moor lochs. The fauna of eutrophic and mesotrophic lochs includes a few euryhaline brackish-water species Potamopyrgus jenkinsi, Diaptomus wierzejskii, Neomysis integer and Gammarus duebeni. G. duebeni alone penetrates the oligotrophic lochs. Freshwater sponges are widespread but are absent from the machair lochs and there are no triclad planarians. The fauna of fast and slow stream segments is described. Loch Bee, a man-made lagoon, unlike the open brackish lochs of North Uist, is an unstable habitat and its fauna has changed considerably since it was investigated in 1933. The fauna consists mainly of brackish-water species and a few stenohaline marine species which are confined to its seaward ends. The sequence of faunistic change in the Howmore estuary, Lochs Roag and Fada, a Site of Special Scientific Interest (SSSI), is described; the brackish-water fauna is reduced by the volume of fresh water passing through the system. A brief account is given of the unusual dominance of Hyalinella punctata and Potamopyrgus jenkinsi in Loch Ardvule (SSSI), South Uist.

}, keywords = {Invertebrates, Loch Druidibeg, Uist}, issn = {0269-7270}, doi = {10.1017/S0269727000012793}, url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online\&aid=8378836\&fulltextType=RA\&fileId=S0269727000012793}, author = {Waterston, AR and Lyster, IHJ} } @article {Welch2011, title = {Survey of the invertebrate fauna of sand dune and machair sites in the Outer Hebrides during 1976}, journal = {Proc. R. Soc. Edinburgh. Sect. B. Biol. Sci.}, volume = {77}, year = {2011}, month = {dec}, pages = {395{\textendash}404}, publisher = {Cambridge University Press}, abstract = {

During June and July 1976 the Institute of Terrestrial Ecology carried out a limited invertebrate survey on 18 sites in the Outer Hebrides.

Portable battery-operated UV light traps were installed at each site and left to operate for eight nights. Bad weather in June greatly reduced the numbers of Lepidoptera caught. During July moths were trapped at 16 of the sites. Details of the combined catches are given. Pitfall traps were also installed at all sites and all beetles, spiders, harvestmen, snails, millipedes, centipedes and woodlice have been identified. In addition a list of species of littoral Coleoptera recorded from 24 Hebridean localities is given.

This survey was part of a much wider project around the coasts of Scotland, commissioned by the Nature Conservancy Council, to whom a full report will be submitted when identification and analysis of the results has been completed.

}, keywords = {Arachnids, Coleoptera, Dunes, Invertebrates, Lepidoptera, Machair, molluscs, Outer Hebrides}, issn = {0269-7270}, doi = {10.1017/S0269727000012811}, url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online\&aid=8378842\&fulltextType=RA\&fileId=S0269727000012811}, author = {Welch, R. C.} }