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The brackish-water lochs of North Uist
Nicol, E.A.T. (1937). The brackish-water lochs of North Uist. Proc. R. Soc. Edinb. 56(3-4): 169-195. hdl.handle.net/10.1017/S037016460001498X
In: Proceedings of the Royal Society of Edinburgh. Neil and Co.: Edinburgh. ISSN 0370-1646, more
Peer reviewed article  

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Keyword
    Brackish water

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  • Nicol, E.A.T.

Abstract
    The brackish-water lochs of North Uist lie at different levels and are influenced in varying degrees by the tidal inflow. All intermediate conditions between lochs entered by every tide and having a salinity of over 30°/00, and those entered by only the highest spring tides, with a salinity of 2 or 3°/oo are to be found. The hydrogen ion concentration of the fresh water on the island is about pH 5.4, but that of the brackish water is high, varying from 7.8 to 9.9. The alkali reserve is usually below that of sea water and is often below 0.0010 N.The fauna of the lochs is varied; 59 marine, 24 fresh- and 25 brackishwater species were found as well as 5 euryhaline forms such as the salmon, which are equally at home in any salinity.Graphs have been prepared to show the distribution of the animals at different salinities, and a comparison is made with the Baltic and elsewhere.

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