Wednesday 12 August 2015

Rockpooling Destination: Ardnamurchan Light House, Scotland, May 2015

The shore comprises bedrock with crevices, gullies, rockpools and varying amounts of sand. Yellow and grey lichens characterise the supralittoral, with tar lichen and channel wrack in the littoral fringe. The littoral communities below comprise barnacles, periwinkles, anemones and sand scour tolerant seaweeds.

Below are images of organisms you may encounter whilst rockpooling in these habitats:



The shore comprises bedrock and sand. The supralittoral rock of the shore supports yellow and grey lichens and sea pinks (Armeria maritima). Below, the black tar lichen, Verrucaria maura covers the rock. Habitat classification: LS.Lsa (Littoral sand) EUNIS A.2, LR.FLR.Lic.YG (Yellow and grey lichens on supralittoral rock) EUNIS: B3.111 and LR.FLR.Lic.Ver (Verrucaria maura on littoral fringe rock)  EUNIS: B3.113.


Sea pinks and lichens have a patchy distribution among the pinnacles of rock.

Channel wrack (Pelvetia canaliculata) occurs as a band on the littoral fringe bedrock.
Rough periwinkles (Littorina spp) occur within the littoral fringe
 and upper shore.

A rough periwinkle (Littorina spp)


Ulva spp (formally entermorpha spp) occurs in many of the upper shore, sand filled rockpools.

Ulva spp 

Barnacles and limpets of the upper shore exhibit an aggregated distribution, positioning themselves in the leeward side of the bedrock.

This distribution is seen across the shore with barnacles and limpets aggregating in the leeward side of the bedrock.

Barnacles

Patches of  Lichina pygmaea can be found among the barnacle communities.
Lichina pygmaea and Edible periwinkle (Littorina littorea)

Littorina littorea

Littorina littorea

Littorina littorea

Snakelocks anemone (Anemonia viridis)

Mastrocarpus stellatus
Among the shells of the upper shore, terrestrial insects like wood lice can often be found.






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