Ulva intestinalis
| Ulva intestinalis | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Clade: | 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
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
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
References
- ↑ "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