Themeda grassland on seacliffs and coastal headlands in the NSW North Coast, Sydney Basin and South East Corner Bioregions - profile

Indicative distribution


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Key:
known
predicted
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Themeda grassland on seacliffs and coastal headlands in the NSW North Coast, Sydney Basin and South East Corner Bioregions
Conservation status in NSW: Endangered Ecological Community
Commonwealth status: Not listed
Gazetted date: 21 Oct 2005
Profile last updated: 07 Sep 2017

Description

Themeda australis is the dominant species in the Themeda Grassland on seacliffs and coastal headlands in the NSW North Coast, Sydney Basin and South East Corner bioregion ecological commmunity. Themeda australis is an extremely widespread species, but in this community it may have a distinctive appearance, being prostrate and having glaucous leaves. These features are retained in cultivation and the form is believed to be genetically distinct. Banksia integrifolia subsp. integrifolia, Westringia fruticosa and Acacia sophorae occurs as an emergent shrub or as a dense cover where they have recruited over grasslands. Smaller shrubs occur often as prostrate to dwarf forms, most frequently Pimelea linifolia, Hibbertia vestita, Pultenaea maritima and Westringia fruticosa.  Although a number of woody species are listed as part of the community, these are usually sparsely distributed and may be absent from some stands. In central and south coastal stands tussocks of Poa poiformis may be found in some stands of the community, but Poa poiformis-dominated tussock grassland is generally found lower on cliffs (closer to the sea and more exposed to spray) and on steeper slopes. Other grasses that occur in the community include Zoysia macarantha and Cynodon dactylon. A number of threatened species occur in some stands of the community, including Diuris sp. aff. chrysantha, Pultenaea maritima, Rutidosus heterogama, Thesium australe and Zieria prostrata. The endangered population of the low growing form of Zieria smithii at Diggers Head is found in this community. Herbs in the ground layer include the twining Polymeria calycina, succulent Apium prostratum, Senecio pinnatifolius subsp. pinnatifolius and Xerochrysum bracteatum. The community is the major habitat for a number of other species, including Chamaecrista maritima, Plectranthus cremnus and Stackhousia spathulata.

Distribution

Themeda Grassland on seacliffs and coastal headlands is found on a range of substrates in the NSW North Coast, Sydney Basin and South East Corner bioregions. Stands on sandstone are infrequent and small. Larger stands are found on old sand dunes above cliffs, as for example at Cape Banks and Henry Head in Botany Bay National Park, and on metasedimentary headlands, as for example at McCauleys Headland in Coffs Coast Regional Park, Look-at-me-now Headland, Dammerels Head and Bare Bluff in Moonee Beach Nature Reserve and Wilson's Headland in Yuraygir National Park. Individual stands of the community are often very small, a few square metres, but at some sites larger stands of up to several hectares or tens of hectares occur. Overall, the community has a highly restricted geographic distribution comprising small, but widely scattered patches.

Habitat and ecology

  • The community is found on a range of substrates, although stands on sandstone are infrequent and small.
  • Larger stands are found on old sand dunes above cliffs, for example at Cape Banks and Henry Head in Botany Bay National Park, and on metasedimentary are rarely adamellite headlands on the north coast.
  • Individual stands of the community are often very small, a few square metres, but at some sites larger stands of up to several hectares or tens of hectares occur. Overall, the community therefore has a highly restricted geographic distribution comprising small, but widely scattered patches.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Threats

Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
NSW North CoastCoffs Coast and Escarpment Known None
NSW North CoastKaruah Manning Known None
NSW North CoastMacleay Hastings Known None
NSW North CoastYuraygir Known None
Other StateJervis Bay Territory Known None
South East CornerBateman Known None
South East CornerEast Gippsland Lowlands Known None
South East CornerSouth East Coastal Ranges Known None
South Eastern QueenslandBurringbar-Conondale Ranges Known None
South Eastern QueenslandClarence Lowlands Known None
South Eastern QueenslandClarence Sandstones Predicted None
South Eastern QueenslandScenic Rim Predicted None
South Eastern QueenslandSunshine Coast-Gold Coast Lowlands Known None
Sydney BasinIllawarra Known None
Sydney BasinJervis Known None
Sydney BasinPittwater Known None
Sydney BasinSydney Cataract Known None
Sydney BasinWyong Known None