Marine Biodiversity Data Portal - NI
Black Neb, Strangford Lough.
Survey number: 555 Event number: 19850626/21 Date: 1985-06-26 GPS: 54.47800,-5.54200. Depth: 3.5 to 0.2 m. [ View map ]
Site Description: The shore consisted of a mixture of habitats, shore types and exposure grades. The upper shore consisted of steep rock ridges which were relatively exposed, but behind these occur in a boulder filled depression which was sheltered. The middle shore has small medium and large boulders on muddy sand and gravel with small ridges acting as a divide between the middle and lower shore. below the small ridges, the boulders were more densely packed and were a top of gravel, stones and coarse sand. At the extreme lower shore the boulders became scarcer and the bottom more stony. Exposure seemed to vary with shore position e.g. the depression behind the ridges at the shore top was sheltered and had good cover of Pelvetia and Fucus spiralis, whereas this zone was replaced on the more exposed face of the upper shore ridges by a patellobarnacle community. The middle shore boulders and ridges were covered by Ascophyllum below which a blanket cover of Fucus serratus occurred. The lowermost zone was Laminaria dominated. The sand, mud, gravel had a Venerupis community with Cirratulus and Nephtys and Arenicola. The zones of the mid and lower shore had much filamentous brown algae present.
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Species list (192 species recorded)
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