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1982-OPRU-Skomer-sublittoral-survey.csv

Species point records from 1982 OPRU Skomer sublittoral survey

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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		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		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.
JNCCMNCR10219378	JNCCMNCR10000184	1982 OPRU Skomer sublittoral survey	JNCCMNCR10009518	1982-10-10	1982-10-10	D	`Settlement' Headland (Skomer marine nature reserve)	Point	51.7191346346807	-5.22817304720905	WGS84	134113	Thymosia guernei	FALSE	R		FALSE	At 3m BCD, the main substratum was bedrock ridges with a slope and vertical wall. In between were troughs containing large pebbles, and with scoured sides. Dense kelp was present on the bedrock, with an undergrowth of foliose and encrusting algae and animals. Some silt was present on the rocks. The topography at 7m was very similar, but with some flatter areas of rock and more silt. The kelp forest was more sparse, but with large plants. At 11m, the slope flattened off a little, and troughs were filled with coarse gravel, with much algal drift and debris present. By 12m, the ridges were outcropping from fine sand. Further out were some interesting large rock outcrops with varied topography, deep algae and a rich animal population. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.
JNCCMNCR10219181	JNCCMNCR10000184	1982 OPRU Skomer sublittoral survey	JNCCMNCR10009502	1982-10-25	1982-10-25	D	300m E of High Point (Skomer marine nature reserve)	Point	51.7389155783709	-5.22842444111013	WGS84	135144	Caryophyllia (Caryophyllia) smithii	FALSE	C		FALSE	A steep rock slope was present adjacent to the shore extending offshore as a steep slope of large boulders with some rock outcrops and patches of shell gravel. At about 12m below chart datum, the boulder zone merged into a plain of small boulders, stones and gravel with occasional rock outcrops. Increasingly large amounts of muddy sand were present to the muddy sand plain at about 14m depth and approximately 30m offshore. The plain of muddy sand extended in a very gradual slope northwards out to at least near the seaward boundary of the marine nature reserve. Rock surfaces to a depth of 8m below chart datum were dominated by a forest of Laminaria hyperborea. Foliose algae were present but were not dense and boulders deeper than the kelp forest had a rather bare appearance with large numbers of sea urchins, Echinus esculentus, recorded at one site. The vertical or overhanging sides of large boulders and bedrock were dominated by erect Bryozoa with sponges, hydroids and Caryophyllia smithii, in particular, present. E. esculentus, Alcyonium digitatum, Asterias rubens and Balanus sp(p). were particularly conspicuous on the steep boulder slope. Other species recorded were Holothuria forskali, Corynactis viridis and Pentapora foliacea. No burrowing sea cucumbers (Neopentadactyla mixta) were recorded from the shell gravel areas between boulders at any of the sites. The small stones and large shells at the transition between rock and sediment habitats were colonised by the tubeworm Pomatoceros triqueter and by Balanus spp. (mostly dead shells) with scattered small hydroids, the tunicate, Dendrodoa grossularia, and the bulbous encrusting bryozoan, Cellepora pumicosa. Pagurid crabs were frequent and single records of scallops, Pecten maximus, were made. The epifauna species recorded from the muddy sand plain were Suberites sp., Lanice conchilega, Sabella penicillus, Aphrodite aculeata, Buccinum undatum, Pecten maximus, Cyprina islandica, shells of Ensis sp., Liocarcinus ? depurator, Paguridae, octopus, Inachus sp., Alcyonidium gelatinosum, Ophiura texturata and Asterias rubens. The communities were characterised by L. conchilega and O. texturata. 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.