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Marine biology of Milford Haven: The distribution of littoral plants and animals
Nelson-Smith, A. (1967). Marine biology of Milford Haven: The distribution of littoral plants and animals. Field Stud. 2(4): 435-477
In: Field Studies. Field Studies Council: London. ISSN 0428-304X, more

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  • Nelson-Smith, A.

    Milford Haven is a deep and rocky estuary which is likely to become heavily industrialized in the near future. As part of an ecological study of the entire estuary, shore surveys already carried out around the mouth were' extended to the limits of tidal influence in the rivers Cleddau. Distribution maps are given for all the common sessile plants and animals of rocky or stony shores and their vertical zonation has been determined on a selection of such shores throughout the estuary. The patterns of distribution revealed in this way point to three regions as being biologically critical. In each of these the salinity regime or the nature of shore deposits changes markedly within a short distance. Although some forms typical of exposed shores do not penetrate far into the Haven, many other marine species extend for a considerable distance upstream; the factors influencing the extent of their penetration and the significance of changes in their zonation are discussed.

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