Posidonia kirkmanii

Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA LILIOPSIDA NAJADALES POSIDONIACEAE

Scientific Name: Posidonia kirkmanii
Species Authority: J.Kuo & Cambridge
Common Name(s):
English Species code: Pk
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.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2007-10-23
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.
Justification:
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.

Geographic Range [top]

Range Description:Posidonia kirkmanii is endemic to Western Australia, from Cape Leeuwin to the western edge of the Great Australian Bight.
Countries:
Native:
Australia (Western Australia)
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern
Range Map:Click here to open the map viewer and explore range.

Population [top]

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.
Population Trend: Stable

Habitat and Ecology [top]

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.
Systems: Marine

Threats [top]

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 [top]

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).

Bibliography [top]

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. In: The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 26 July 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided