Silky thread weed (Derbesia marina)
|Researched by||Morvan Barnes||Refereed by||Admin|
|Authority||(Lyngbye) Solier, 1846|
|Other common names||-||Synonyms||-|
Derbesia marina is a small whispy green seaweed that forms soft, bright green, filamentous tufts. The filaments may reach up to 3 cm in height. The filaments are usually laterally branched and arise from a basal creeping system which penetrates the substrate. Filaments lack cross walls except at the bases of the branches.
Recorded distribution in Britain and IrelandFound throughout British and Irish coasts, although more common off western Scotland and south-west Britain and Ireland.
HabitatDerbesia marina is a subtidal species usually found down to depths of 20 m attached to sponges, shells and other algae, often where the water flow is rapid.
- Bright green filamentous tufts.
- Laterally branched filaments.
- Up to 3 cm in height.
- Chloroplasts are flat and circular.
The gametophyte life stage of this species is known as Halicystis ovalis and is club-like, spherical or with small bladders. It is attached to the substratum by slender rhizoids (Burrows, 1991).
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Burrows, E.M., 1991. Seaweeds of the British Isles. Volume 2. Chlorophyta. London: British Museum (Natural History).
Dickinson, C.I., 1963. British seaweeds. London & Frome: Butler & Tanner Ltd.
Hardy, F.G. & Guiry, M.D., 2003. A check-list and atlas of the seaweeds of Britain and Ireland. London: British Phycological Society
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
Fenwick, 2018. Aphotomarine. Occurrence dataset http://www.aphotomarine.com/index.html Accessed via NBNAtlas.org on 2018-10-01
National Trust, 2017. National Trust Species Records. Occurrence dataset: https://doi.org/10.15468/opc6g1 accessed via GBIF.org on 2018-10-01.
NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org.
OBIS (Ocean Biodiversity Information System), 2023. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2023-11-29
Royal Botanic Garden Edinburgh, 2018. Royal Botanic Garden Edinburgh Herbarium (E). Occurrence dataset: https://doi.org/10.15468/ypoair accessed via GBIF.org on 2018-10-02.
This review can be cited as:
Last Updated: 02/06/2008