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1984-Bunker-Hiscock-Skomer-sublittoral-survey.csv

Species point records from 1984 Bunker/Hiscock 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
JNCCMNCR10247865	JNCCMNCR10000161	1984 Bunker/Hiscock Skomer sublittoral survey	JNCCMNCR10010570	1984-08-06	1984-08-06	D	Lantern Southern Inlet (Skomer Marine Reserve)	Point	51.735062001872	-5.27015993912588	WGS84	140167	Lacuna crassior	FALSE	R		FALSE	The survey concentrated on the western side of the inlet from head to mouth. A bedrock cliff extended from the shore to 0.7m, where there was a overhang and the cliff was slightly undercut. From 0.7m the cliff descended to 2.7m at the gully head and 6.7m at its mouth. The gully walls bore many recesses some of which formed caverns going up to 1.5m into the cliff. The floor of the gully at 2.7m sloped slightly to moderately and was predominantly large boulders. Some medium boulders and a few angular stones, rounded pebbles and patches of clean shell gravel were present. At 6.7m, the gully floor sloped slightly and was composed of medium boulders, angular stones and rounded pebbles, with one or two large boulders. There was no silt on the gully walls. The gully floor had little silt in places at 2.7m and little to moderate silt at 6.7m. Systematic animal surveys were undertaken. Plant community descriptions are based on notes of conspicuous species. Sublittoral Fringe (MSD +2.3m) Encrusting coralline algae were abundant and Alaria esculenta, Laminaria digitata and Laminaria hyperborea, were all recorded as frequent to common. Patella sp. was recorded as common. Upper Infralittoral (MSD 0.7m) The majority of observations at this depth were on the cliff beneath the dense kelp, under a slight overhang. Dense Laminaria hyperborea dominated rock surfaces between 0.7m and 2.3m. At this level Corallina sp. and Meredithia microphylla were recorded as abundant, Cryptopleura ramosa and encrusting coralline algae as common and Desmarestia aculeata was occasional. Crisiidae were common and amongst the turf Corynactis viridis and ?Salmacina dysteri/Filograna implexa were also common. Of note was the presence of Asterina phylactica (common). The sponges Stelligera rigida and Dysidea fragilis were frequent. Also frequent were Caryophyllia smithii, Balanus crenatus and Polyclinidae. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.
JNCCMNCR10244513	JNCCMNCR10000161	1984 Bunker/Hiscock Skomer sublittoral survey	JNCCMNCR10010482	1984-08-21	1984-08-21	D	W of Pigstone Bay (Skomer Marine Reserve)	Point	51.7355184839649	-5.31799873783497	WGS84	140167	Lacuna crassior	FALSE	O		FALSE	The overall slope of the seabed was slight but bedrock ridges up to 2m high sloped steeply to very steeply. Bedrock was the dominant substratum but gullies between ridges were filled with small boulders and stones (angular and rounded). A few angular pebbles were also present. No silt was present on rock surfaces. Lower Circalittoral (MSD 40m to 41m) Bedrock - Flustra foliacea was abundant, covering many of the bedrock ridges. ?Salmacina dysteri/Filograna implexa was abundant on steeper slopes forming a layer 2cm to 3cm thick. A turf of Crisiidae was present over 40% of the bedrock (abundant). Sponges were present but in low abundance. The hydroid Hydrallmania falcata was common in patches, Aglaophenia sp. was frequent and Sertularia sp(p) was locally frequent. Alcyonidium diaphanum was noted as possibly frequent and several Lacuna crassior were recorded as crawling over colonies of this bryozoan. Asterias rubens was frequent occurring in patches. Erect tongue-like growths of Botryllus schlosseri were frequent. Stones and boulders - The fauna was different to that on the bedrock. Encrusting sponges (including Microcionidae) were locally frequent. The hydroid Tubularia indivisa (stalks only) were occasional to frequent and many were noted to bear Jasiidae tubes. Of encrusting animals, the barnacles Verruca stroemia and Balanus crenatus were frequent and encrusting bryozoa frequent. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.
JNCCMNCR10246572	JNCCMNCR10000161	1984 Bunker/Hiscock Skomer sublittoral survey	JNCCMNCR10010539	1984-08-21	1984-08-21	D	North Haven Landing Place S (Skomer Marine Reserve)	Point	51.7392274099562	-5.2820510353921	WGS84	126792	Callionymus lyra	FALSE			FALSE	The seabed sloped moderately at an estimated 5 degrees. The main substratum was a plain of angular pebbles. Large and small boulders were noted, especially at 1.7m. Between rocks were patches of clean and muddy gravel (both rock and shell). Many empty Patella sp(p) and Mytilus edulis shells were noted. Moderate silt covered many surfaces. Upper Infralittoral (MSD 1.7m to 2.7m) Kelp at 1.7m was 100% cover, mainly Laminaria hyperborea, but Saccorhiza polyschides and Laminaria saccharina were both frequent. At 2.7m, L. hyperborea formed 50% cover, with dense foliose algae beneath. L. saccharina was abundant, with S. polyschides, Calliblepharis ciliata, Ceramium rubrum, Brongniartella byssoides and Dictyota dichotoma all common. A wide variety of other foliose algal species were recorded, including Bryopsis plumosa, Cordylecladia erecta, Grateloupia filicina, Gracilaria verrucosa, Chylocladia verticillata, Stenogramme interrupta, Polysiphonia nigra and Antithamnion plumula. Animals were scarce, but conspicuous species were Pomatoceros triqueter, Balanus crenatus and Gibbula cineraria. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.
JNCCMNCR10246251	JNCCMNCR10000161	1984 Bunker/Hiscock Skomer sublittoral survey	JNCCMNCR10010528	1984-08-21	1984-08-21	D	Knoll S of Shag Stone (Skomer Marine Reserve)	Point	51.7285366469147	-5.27837933948676	WGS84	103788	Molgula manhattensis	FALSE	O		FALSE	At 10.3m, the top of the knoll was a small area (less than 10 metres squared) of moderately sloping bedrock with occasional steep faces. Many crevices were present. The knoll descended with an uneven terrain. From 10.3m to 13.3m the rock sloped more or less steeply with both vertical and moderately sloping areas. Siltation increased with depth. Little silt was found at 10.3m except for moderate cover in a few places. Lower Infralittoral (MSD 10.3m) Surveys at this depth concentrated on the summit of the knoll. General algal cover was 80% to 90%. Foliose red and brown algae dominated the rock surface with Dictyota dichotoma, Delesseria sanguinea and Polyneura gmelinii dominant, but patchy. A few kelp plants and patches of encrusting red algae were present. At 12.3m, Myriogramme heterocarpum was frequent on a vertical wall. Algal cover decreased to 20% at 13.3m. Hydroid/bryozoan turf covered much of the rock surface below the foliose algae. Crisiidae and Scrupocellaria sp(p) were abundant. Nemertesia antennina and Nemertesia ramosa were both common and Corynactis viridis and Cellaria sp(p) locally common. Several sponge species were present; Cliona celata (both massive and encrusting), Dysidea fragilis and purple and orange encrusting sponges (including Myxilla rosacea) were both frequent. The sea anemone Actinothoe sphyrodeta was frequent as was the bryozoan Bugula flabellata. Echinoderms were prevalent with Asterias rubens common and Antedon bifida and Echinus esculentus frequent. Polyclinid ascidians were frequent including the regressive stages. NOTE: Substratum % data are converted from the original substratum 1-3 scoring system.