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.
Knotted / Egg Wrack, Ascophyllum nodosum galled by unknown agent, Perranporth, 30.01.15.
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Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 1
Ascophyllum nodosum
- gall cluster 1
Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 2
Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 3
Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 4
Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 5
Galling agent (unknown)
Ascophyllum nodosum
- gall close-up 1
Knotted Wrack, Ascophyllum, nodosum, was found with galls, washed-up and covered in a fine brown algae, hydroids and diatoms. The term driftweed is generally applied, as the algae has probably washed here as a result of it's commercial harvest in the eastern United States or Canada. Numerous pieces of algae were found with galls at Perran Sands, Perranporth, near Newquay, Cornwall, 30.01.15.
Galling agent (unknown)
Ascophyllum nodosum
- gall cluster 6
Gall above on Knotted or Egg Wrack, Ascophyllum nodosum, as driftweed, found on the strandline at Gwithian, near Hayle, Cornwall, 01.02.15.
The galls above were found to be solid with no obvious chambers.
The agent causing the gall here is not known, but there is a nematode, called Halenchus fucicola, that regularly causes galls in Knotted Wrack, Ascophyllum nodosum, in the UK.
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.