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 Ascophyllum nodosum
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Bifurcariopsidaceae |
Fucales is an order in the Phylum Phaeophyta or Brown algae. Animals Plants fungi, and Protists are eukaryotes (juːˈkærɪɒt or -oʊt Organisms whose cells are organized into complex Chromalveolata is a Eukaryote supergroup first proposed by Thomas Cavalier-Smith as a refinement of his kingdom Chromista, which was first The heterokonts or stramenopiles are a major line of Eukaryotes presently containing about 10500 known species The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder The Qilin ( also spelled Kylin, or Kirin ( Japanese and Korean) is a Mythical hooved Chinese chimerical Fucaceae are a family of Brown algae There are 8 genera in the family most notably Fucus, which includes several common Seaweeds Sargassaceae is a family of brown algae This article is about the taxonomic rank for the sequence of species in a taxonomic list see Taxonomic order In scientific classification used A phylum ( Plural: phyla) is a Taxonomic rank between Kingdom and above Class. The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder Members of this order are fucoids. The list of families (see box at right) in Fucales, as well as additional taxonomic information on algae, is publicly accessible at Algaebase. [1] [1]
The Class Phaeophyceae is included within the Division Heterokontophyta. [2] This name comes from the Greek word phaios meaning "brown" and phyton meaning plant. [3] They include some of the largest plants in the sea, some however are small and fine in structure.
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Classification
The Class Phaeophyceae is devided into the following orders (Hoek, 1995). [4]
- Ectocarpales
- Sphacelariales
- Syringodermatales
- Dictyotales
- Scytosiphonales
- Cutleriales
- Dictyosiphonales
- Chordariales
- Sporochnales
- Desmarestiales
- Fucales **Fucus
- Durvillaeales
- Ascoseirales
The Fucales include some of the more common littoral seaweeds and the members of the order have the typical seaweed construction: a holdfast, stipe and lamina. Kelp are large Seaweeds ( Algae) belonging to the Brown algae and classified in the order Laminariales Fucus is a Genus of Brown alga ( Seaweed) in the Class Phaeophyceae to be found in the intertidal zones of rocky shores Littoral refers to the coast of an ocean or sea or to the banks of a river lake or estuary Seaweed is a loose colloquial term encompassing macroscopic Multicellular, benthic marine Algae. A holdfast is a Root -like structure that anchors aquatic Sessile organisms such as Seaweed, other sessile Algae, stalked In Botany, a stipe is a supportive structure that may be the stem-like part of the thallus of a Seaweed or a true leaf stem as in Ferns A Lamina in the Algae is a generally flattened structure which typically forms the principal bulk of macroscopic plants The lamina is often much branched and may include gas filled bladders. Growth is by division of the apical cells.
They are oogamous where there is fusion between the small male gamete and the large female gamete.
As their general name suggests their pigmentation is brown. For the drug referred to as "pigment" see Black tar heroin. All species are multicellular. Full details of the characteristics are complex and consist of details of the flagella, shape of the chloroplasts, structure of the cell walls and details of the life-cycle. [4]
Numbers
There are about 1,500 - 2,000 species of brown seaweeds world-wide. [5]
References
- ^ Guiry, M. D. and Guiry, G. M. 2006. AlgaeBase version 4. 2. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 07 December 2006
- ^ Hardy, . G. and Guiry, M. D. 2006. A Check-list and Atlas of the Seaweeds of Britain and Ireland. 2006. The British Phycologcal Society. ISBN 3-906166-35-X
- ^ Huisman, J. M. 2000. Marine Plants of Australia. University of Western Australia Press, Australia. ISBN 1 876268 33 6
- ^ a b Hoek, C. van den, Mann, D. G. and Jahns, H. M. 1995. Algae. Cambridge University Press. ISBN 0 521 30419 9
- ^ Thomas,D. N. 2002. Seaweeds. The Natural History Museum, London. ISBN 0565 091751
Further reading
- Fletcher, R. L. 1987. Seaweeds of the British Isles. Volume 3 , Part 1. British Museum (Natural History), London. ISBN 0 565 00992 3
External links
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