Ulva intestinalis
| Ulva intestinalis | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Supergroup: | Archaeplastida |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Ulvophyceae |
| Order: | Ulvales |
| Family: | Ulvaceae |
| Genus: | Ulva |
| Species: | U. intestinalis |
| Binomial name | |
| Ulva intestinalis | |
| Synonyms | |
| |
Ulva intestinalis is a green alga in the family Ulvaceae, known by the common names sea lettuce, green bait weed, gutweed,[1] and grass kelp.[2] Until they were reclassified by genetic work completed in the early 2000s, the tubular members of the sea lettuce genus Ulva were placed in the genus Enteromorpha.[3]
Distribution
[edit]This species has a generally world-wide distribution.[4] In the Pacific Ocean, it can be found in the Bering Sea near Alaska, the Aleutian Islands, Puget Sound, Japan, Korea, Mexico, the Philippines, and Russia,[5] as well as New Zealand.[6][7] In the Atlantic Ocean, its range includes the Azores, the Baltic Sea, the Mediterranean Sea, and northern European countries such as Ireland, Belgium, Denmark, Norway, and Poland.
Description
[edit]The branched fronds are completely tubular and expand in width to mid-thallus, reaching 15 cm long or more. The cells are irregularly arranged and the chloroplast is hood-shaped and placed to one side, generally with only one pyrenoid.[3][4] The species may be 10–30 centimetres (3.9–11.8 in) long and 6–18 millimetres (0.24–0.71 in) wide. The fronds have rounded tips.[8]
This alga may be reproductive at all times of the year, and has a life-cycle with alternation of generations, in which the gametophyte and sporophyte are isomorphic, having identical morphology.[4]
In some references the species (Ulva intestinalis) is treated as two subspecies: ssp. intestinalis (L.) Link and ssp. compressa (L.) Link.[4][9]
In other languages
[edit]References
[edit]
- ↑ "Gutweed". www.kscience.co.uk. Archived from the original on 2024-12-26. Retrieved 2023-12-05.
- ↑ Grass-kelp, Gutweed Archived 2015-06-20 at the Wayback Machine
- 1 2 Guiry, M.D., John, D.M., Rindi, F. and McCarthy, T.K. (Eds) 2007. New Survey of Clare Island. Volume 6: The Freshwater and Terrestrial Algae. p. 23. Royal Irish Academy. ISBN 978-1904890-31-7
- 1 2 3 4 Burrows, E.M. 1991. Seaweeds of the British Isles. Volume 2 Chlorophyta. British Museum (Natural History). ISBN 0-565-00981-8
- ↑ "Ulva intestinalis". Seaweed of Alaska. Retrieved March 24, 2013.
- 1 2 Guiry, M.D. (2012). "Ulva intestinalis Linnaeus, 1753". WoRMS. World Register of Marine Species. Retrieved March 24, 2013.
- ↑ W. A., Nelson (2013). New Zealand seaweeds : an illustrated guide. Wellington, New Zealand: Te Papa Press. p. 42. ISBN 9780987668813. OCLC 841897290.
- ↑ "Gut weed - Ulva intestinalis". Retrieved March 24, 2013.
- ↑ Morton, O. 1994. Marine Algae of Northern Ireland. Ulster Museum ISBN 0 900761 28 8