Halimeda
| Halimeda | |
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| File:HALIMEDA PICT0294.jpg | |
| Halimeda tuna | |
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Halimeda
J.V.Lamouroux, 1812
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| Type species | |
| Halimeda tuna (J. Ellis & Solander) J.V. Lamouroux, 1816
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| Species[1] | |
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see text. |
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Halimeda is a genus of green macroalgae. The algal body (thallus) is composed of calcified green segments. Calcium carbonate is deposited in its tissues, making it inedible to most herbivores.
As in other members of the order Bryopsidales, individual organisms are made up of single multi-nucleate cells. Whole meadows may consist of a single individual alga connected by fine threads running through the substrate.[2]
Halimeda is responsible for distinctive circular deposits in various parts of the Great Barrier Reef on the north-east coast of Queensland, Australia. Halimeda beds form in the western or lee side of outer shield reefs where flow of nutrient-rich water from the open sea allows them to flourish, and are the most extensive, actively accumulating Halimeda beds in the world.
The genus is one of the best studied examples of cryptic species pairs due to morphological convergence within the marine macroalgae. [3] [4] [5]
Species
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- H. bikinensis
- H. borneensis
- H. cereidesmis
- H. copiosa
- H. cryptica
- H. cuneata
- H. cylindracea
- H. discoidea
- H. distorta
- H. favulosa
- H. fragilis
- H. gigas
- H. goreauii
- H. gracilis
- H. heteromorpha
- H. howensis
- H. hummii
- H. incrassata
- H. kanaloana
- H. lacrimosa
- H. lacunalis
- H. macroloba
- H. macrophysa
- H. magnidisca
- H. melanesica
- H. micronesica
- H. minima
- H. monile
- H. opuntia
- H. pumila
- H. pygmaea
- H. renschii
- H. scabra
- H. simulans
- H. stuposa
- H. taenicola
- H. tuna
- H. velasquezii
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ The Cell Biology of the Bryopsidales
- ↑ Kooistra W.H.C.F., Coppejans E.G.G. & Payri C. (2002). Molecular systematics, historical ecology, and phylogeography of Halimeda. (Bryopsidales) Molecular Phylogenetics and Evolution 24: 121–138
- ↑ Verbruggen H., De Clerck O., Kooistra W.H.C.F. & Coppejans E. (2005). Molecular and morphometric data pinpoint species boundaries in Halimeda section Rhipsalis (Bryopsidales, Chlorophyta). Journal of Phycology 41: 606-621
- ↑ Verbruggen H., De Clerck O., Schils T., Kooistra W.H.C.F. & Coppejans E. (2005). Evolution and phylogeography of Halimeda section Halimeda. Molecular Phylogenetics and Evolution 37: 789-803
External links
- "Deepwater seagrass and Halimeda: lost lawns of the outer shelf",
- Australian Institute of Marine Science, retrieved 10 November 2006
- "Other species of conservation concern",
- Great Barrier Reef Marine Park Authority, retrieved 10 November 2006
- ReefCorner - Halimeda Algae Database Entry
