APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Laminaria digitata, Oarweed, stipe possibly galled by a brown alga. Skilly, Newlyn, 08.09.18. (Algal galls)
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Galling agent (unknown)
Laminaria digitata
- hard lozenge-shaped gall 1

A thallus of Laminaria digitata, Oarweed, was found with a hard lozenge-shaped gall on the side of its stipe on and extra low water spring tide at Skilly, near Newlyn, Cornwall, 08.09.18.

The galls above were found to be solid with no obvious chambers. The agent causing the gall here is possibly a brown algal endophyte (possibly any of the following Ectocarpus, Laminariocolax, Laminarionema).

Ref: 'Galls on Laminaria', external website.

Laminaria digitata Oarweed stipe possibly galled by a brown alga Algal Gall images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.