|Scientific Name:||Posidonia kirkmanii|
|Species Authority:||J.Kuo & Cambridge|
|Taxonomic Notes:||This species is part of the P. ostenfeldii complex and is therefore treated as a separate species (Kuo and Cambridge 1984). This species is currently undergoing taxonomic review.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C.|
|Reviewer(s):||Livingstone, S., Harwell, H. & Carpenter, K.E.|
This species is found in open ocean and is commonly recorded. There is little information known about the species, and there are no major threats other than localized human activities. The population is thought to be stable. Therefore it is listed as Least Concern.
|Range Description:||Posidonia kirkmanii is endemic to Western Australia, from Cape Leeuwin to the western edge of the Great Australian Bight.|
Native:Australia (Western Australia)
|FAO Marine Fishing Areas:||
Indian Ocean – eastern
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Posidonia kirkmanii is locally dominant, but generally uncommon. There is no specific population trend information for Posidonia kirkmanii, but it is thought to be stable.|
|Habitat and Ecology:||
The P. ostenfeldii complex typically form patchy meadows with mixed species in open ocean or rough water sublittoral habitats (Cambridge 1975). They are characterised by their long, thick, leathery leaves and long leaf sheaths that are deeply buried. These characters appear to be associated with strong wave movement and mobile sand substratum typical of the environments in which they are found (Kuo and Cambridge 1984).
Campey et al. (2000) implies that vegetative morphological characters, upon which five species of the P. ostenfeldii complex were erected, was not effective for the identification of species from multiple samples from any one location.
|Major Threat(s):||Threats may include coastal development by industry, pipelines, communication cables, mining and dredging. Additional threats include pollution from eutrophication causing seagrass overgrowth and smothering of epiphytes, aquaculture, farming and direct physical damage by recreational and commercial boating activities (Green and Short 2003).|
|Conservation Actions:||It is recommended that the whole P. ostenfeldii complex be reanalyzed and that further morphological and genetic work is carried out (Campey et al. 2000).|
Cambridge, M.L. 1975. Seagrasses of south-western Australia with special reference to the ecology of Posidonia australis Hook f. in a polluted environment. Aquatic Botany 1: 149-161.
Campey, M.L., Waycott, M. and Kendrick, G.A. 2000. Re-evaluating species boundaries among members of the Posidonia ostenfeldii species complex (Posidoniaceae) - morphological and genetic variation. Aquatic Botany 66(1): 41-56.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Kuo, J. and Cambridge, M.L. 1984. A taxonomic study of the Posidonia ostenfeldii complex (Posidoniaceae) with descriptions of four new Australian seagrasses. Aquatic Botany 20: 267-95.
|Citation:||Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C. 2010. Posidonia kirkmanii. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 29 March 2015.|
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