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Species point records from 1982 OPRU Skomer sublittoral survey1982-OPRU-Skomer-sublittoral-survey.csv

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RecordKey SurveyKey SurveyName SampleKey StartDate EndDate DateType LocationName DataType Latitude Longitude Projection AphiaId Species Uncertain Abundance_SACFORN Abundance_Count IsDead SampleComment
JNCCMNCR10218763 JNCCMNCR10000184 1982 OPRU Skomer sublittoral survey JNCCMNCR10009466 1982-10-24 1982-10-24 D 600m E of High Point (Offshore) (Skomer marine nature reserve) Point 51.7398927655825 -5.22559658198794 WGS84 126792 Callionymus lyra FALSE O Not set FALSE Rippled muddy sand, shelving gradually from 13m to 15m BCD. Gravel and stone encountered at 15m BCD. Wide variety of visible species, characterised by Lanice concheliga and Ophiura ophiura. The epifauna species observed, together with the sediment type, suggest a rich, fairly stable community. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.
JNCCMNCR10218413 JNCCMNCR10000184 1982 OPRU Skomer sublittoral survey JNCCMNCR10009444 1982-10-10 1982-10-10 D Pinnacle S of Gateholm Stack (Skomer marine nature reserve) Point 51.720064128229 -5.22708076860827 WGS84 134113 Thymosia guernei FALSE R Not set FALSE The sublittoral fringe was dominated by encrusting calcareous algae, with Alaria esculenta, Laminaria digitata, Acmaea virginea and large numbers of Gibbula cineraria present. The shore was fringed below 0m by very large boulders out to about 30m from low water mark and followed by areas of broken bedrock with large patches of coarse rippled sand, gravel and pebbles present. The gravel and pebbles present amongst the rocks clearly caused considerable scour but only to the lowest parts of the rock. Here, rock was bare or covered in encrusting calcareous algae with some Laminaria saccharina present. The large boulders and bedrock supported a forest of Laminaria hyperborea which extended to a depth of 8m below chart datum level with individual plants present to 10m. Upward-facing surfaces were dominated by algae. From about 50m offshore, large rock pinnacles several metres high and with some vertical and overhanging surfaces were present. These shaded surfaces were colonised by a variety of sponges, particularly Pachymatisma johnstonia and Cliona celata. Other sponge species encountered in small numbers were Thymosia guernii, Stellata grubii and Dercitus bucklandii, all species rarely encountered in sublittoral areas though widely distributed within the Skomer marine nature reserve. Many surfaces were colonised by a turf of bryozoans of the Family Crisiidae with scattered cup corals (Caryophyllia smithii). Occasional ballan wrasse (Labrus bergylta) and leopard-spotted gobies (Thorogobius ephippiatus) were observed and wreck fish (Trisopteris sp.) were present in caves formed by boulders. Rocks at depths below 6m were generally silty and the sponge Ciocalypta penicillus (which is characteristic of rock subject to sand cover) was present near to areas of sediment. Some branching sponges were present on vertical surfaces on the offshore rock pinnacles. Offshore areas of rock, with algae were sparse, were generally dominated by the barnacles Balanus crenatus with sparse ascidians Polycarpa sp.. Other conspicuous species included the starfish Marthasterias glacialis and Henricea sp.. Only very small numbers of the sea urchin Echinus esculentus were seen, one and two at Sites 2 and 3. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.