|Scientific Name:||Halophila australis|
|Species Authority:||Doty & B.C.Stone|
|Taxonomic Notes:||This species is often difficult to distinguish from H. ovalis.|
|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 listed as Least Concern as there are no known major threats causing declines in the current range. There are, however, taxonomic issues with this species due to the difficulties in distinguishing it from H. ovalis.
|Range Description:||Halophila australis is endemic to Australia, occurring along the southern coast from Perth to Victoria and in northern Tasmania.|
|FAO Marine Fishing Areas:||
Indian Ocean – eastern; Pacific – southwest
|Lower depth limit (metres):||15|
|Upper depth limit (metres):||1|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||There is no specific population information for H. australis, but the population trend is thought to be stable. This species is difficult to distinguish from H. ovalis except when flowering.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||Halophila australis is a temperate species growing in the southern seas of Australia, with rapid growth, high turn-over and wide ecological range. It is considered a pioneering species.|
|Generation Length (years):||4|
|Major Threat(s):||Localized threats in the region are coastal development from industry, pipelines, and communication cables, mining and dredging, eutrophication, aquaculture, farming, direct physical damage by recreational and commercial boating activities, and to some extent trawling activities. Light reduction due to high sediment loads in water is also a threat to this species (Green and Short 2003).|
|Conservation Actions:||Halophila australis is protected by the Fisheries Act, National Park, and Marine Park Acts (Green and Short 2003).|
Green, E.P. and Short, F.T. 2003. World Atlas of Seagrasses. University of California Press, Berkeley.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Waycott, M. 1995. Assessment of genetic variation and clonality in the seagrass Posidonia australis using RAPD and allozyme analysis. Marine Ecology Progress Series 116: 289-295.
Waycott, M. and Sampson, J.F. 1997. The mating system of a hydrophilous angiosperm Posidonia australis (Posidoniaceae). American Journal of Botany 84: 621-625.
Waycott, M., James, S.H. and Walker, D.I. 1997. Genetic variation within and between populations of Posidonia australis, a hydrophilous, clonal seagrass. Heredity 79: 408-417.
|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. Halophila australis. The IUCN Red List of Threatened Species 2010: e.T173371A7001541. http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T173371A7001541.en . Downloaded on 09 October 2015.|