Coastal Upland Swamp in the Sydney Basin Bioregion - 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: Coastal Upland Swamp in the Sydney Basin Bioregion
Conservation status in NSW: Endangered Ecological Community
Commonwealth status: Endangered
Gazetted date: 09 Mar 2012
Profile last updated: 19 Oct 2017

Description

The Coastal Upland Swamp in the Sydney Basin Bioregion includes open graminiod heath, sedgeland and tall scrub associated with periodically waterlogged soils on the Hawkesbury sandstone plateaux.  The Coastal Upland Swamp is generally associated with soils that are acidic and vary from yellow or grey mineral sandy loams with a shallow organic horizon to highly organic spongy black peat soils with pallid subsoils.
The vegetation of the Coastal Upland Swamp may include tall open scrubs, tall closed scrubs, closed heaths, open graminoid heaths, sedgelands and fernlands.  Larger examples may include a complex of these structural forms.  The flora comprising the upland swamp is diverse there are 73 plant species listed as characterising the ecological community.  The total species list is much greater and is likely to exceed 200 species of vascular plants. 

Distribution

The Coastal Upland Swamp is endemic to NSW and confined to the Sydney Basin Bioregion.  It occurs in the eastern Sydney Basin from the Somersby district in the north to the Robertson district in the south.
In the north it occurs on the Somersby-Hornsby plateaux, in the the south it occurs on the Woronora plateau.
It occurs in elevations from 20 metres to over 600 metres above sea level, with the majority of swamps occurring within 200 and 450 metres elevation.

Habitat and ecology

  • Coastal Upland Swamps occur primarily on impermeable sandstone plateaux with shallow groundwater aquifers in the headwaters and impeded drainage lines of streams, and on standstone benches with abundant seepage moisture.
  • The Coastal Upland Swamp is generally associated with soils that are acidic and vary from yellow to grey mineral sandy loams with a shallow organic horizon to highly organic spongy black peats with pallid subsoils.

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
Sydney BasinMoss Vale Known None
Sydney BasinPittwater Known None
Sydney BasinSydney Cataract Known None
Sydney BasinWyong Known None
Sydney BasinYengo Known None