Marine Biodiversity Data Portal - NI

Red Arch, NE Coast.

[Site list for year 1985]

Survey number: 555 Event number: 19850903/21 Date: 1985-09-03 GPS: 55.06700,-6.05183. Depth: 3.5 to 0.2 m. [ View map ]

Site Description: The site is composed of sheltered Ascophyllum dominated sandstone conglomerate platforms. Low and gently sloping conglomerate ridge form the upper shore with much indented sandstone ridges forming the lower shore. The supralittoral is made up of shingle with patches of sand and small/medium boulders. Freshwater seepages influence the upper shore. The Laminaria zone was not sufficiently exposed for investigation. There is an unusually high abundance of Ulva clathrata (originally recorded as Enteromorpha ramulosa) in zones 3 & 4. There is also a diverse green and blue-green algae community in the intertidal, suggesting a strong freshwater influence. It’s been raining a lot.

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