AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Antithamnion densum | |
Date of the first record (?) | 1991 References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Guiry MD (2012) A catalogue of Irish seaweeds. pp. [1]-250, 1 pl. Ruggell: A.R.G. Gantner Verlag K.G. Comments: This is a small (20mm) red alga that requires expert identification first found in 1991. |
Recipient region (?) | Country: Ireland LME: 24. Celtic-Biscay Shelf LME sub-region: Celtic seas References (not structured): Guiry MD Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: First located from Clare Island on the west coast of Ireland. Only the sporophytes have been identified from this site. THis area was extensively surveyed in the early 20th century and it was not found on that occasion. |
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Source region (?) | Unknown References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: Its appearance in a western region of Ireland might suggest that the species could be native, other localities include north-western France. |
Pathway / Vector (?) | Unknown Comments: It might have arrived as a result of natural spread but there is no evidence to suggest this. |
Habitat type (?) | Open coast References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: It is ound on exposed rocks in open coastal areas. |
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Wave exposure (?) | Exposed References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. |
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Salinity range (?) | Venice system: 7. Euhaline [30-40psu] References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: It is found in normal salinity of coastal areas. |
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Temperature range (?) | Not entered |
Zonation / Substratum (?) | Benthic: Sublittoral within photic zone Substratum: Hard (cobbles to bedrock) References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: Found in the exposed subtidal of Clare Island on the west coast of Ireland. |
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Reproductive duration (?) | Medium References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: THis algae reproduces at temperatures 16-19C. | |
Reproductive seasonality (?) | Jul. Aug. References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. |
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Migration pattern (?) | Not entered |
Population status (?) | Unknown (Low level of certainty) References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Lee, S.-R., Lee, I. K. & Suh, Y. (2005). Molecular evidence for recognizing Antithamnion sparsum (Ceramiales, Rhodophyta) at the species level. Phycologia 44: 530-535. Maggs, C.A. & Hommersand, M.H. (1993). Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 3A. Ceramiales. pp. [i]-xv, 1-444, 129 figs, map. London: HMSO. Comments: Found during a specific survey and there have been no recent records. the species may be easily overlooked. |
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Species status (?) | Cryptogenic References (not structured): Guiry MD, Maggs CA (1991) Antithamnion densum (Suhr) Howe from Clare Island, Ireland: a marine red alga new to the British Isles. Cryptogamie, Algologie 12: 189-194. Comments: This alga is widely distributed in cold- temperate and warm environments in both hemispheres. The similarity with other forms given different names may indicate that these are the same species. |
Created by | Dan Minchin |
Last update by | Dan Minchin, 2013-11-11 |