The identification of critical habitat for the Register of Critical Habitat, including location and extent information, is a matter of ecological judgement, and is based on the most up-to-date scientific information available to the Threatened Species Scientific Committee and the Minister for the Environment at the time the habitat was being considered. As new or additional information becomes available, critical habitat identified on the Register may be amended.
Lepidium ginninderrense (Ginninderra Peppercress) - Northwest corner Belconnen Naval Transmission Station, ACT
|Listed Critical Habitat:||Lepidium ginninderrense (Ginninderra Peppercress) - Northwest corner Belconnen Naval Transmission Station, ACT|
|Date Effective:||28 Feb 2005|
|Location and extent:||
About 20ha, at Lawson, being an area bounded by a line commencing at the intersection of the northern boundary of Block 2 Section 6 Lawson with the eastern shoreline of Lake Ginninderra (approximate ACT Map Grid point 206670mE 610910mN), then southerly via the eastern shoreline to its intersection with the southern boundary of Block 2 Section 6 Lawson (approximate ACT Map Grid point 206560mE 610260mN), then easterly via the southern boundary of Block 2 Section 6 Lawson to a point where the boundary changes direction at approximate ACT Map Grid point 206710mE 610000mN, then north easterly via a straight line to a point on the northern boundary of Block 2 Section 6 Lawson where it changes direction at approximate ACT Map Grid point 207080mE 610860mN, then westerly via the northern boundary of Block 2 Section 6 Lawson to the point of commencement.
The relevant portion of the property consists of the flood plain of Ginninderra Creek, where natural temperate grassland is dominated by Austrodanthonia spp. and Bothriochloa macra. Associated herbaceous species include Plantago gaudichaudii, Juncus filicaulis, Triptilodiscus pygmaeus, Parentucellia latifolia and Calocephalus citreus.
Current and future actions within the listed property should be undertaken in a way that will not significantly damage Critical Habitat for the Ginninderra Peppercress.
|Reasons for listing:||Criterion (a). Whether the habitat is used during periods of stress. Examples of period of stress: Flood, drought or fire.
N/A Criterion (b). Whether the habitat is used to meet essential life cycle requirements. Examples: Foraging, breeding, nesting, roosting, social behaviour patterns or seed dispersal processes.
Ginninderra Peppercress has a very restricted distribution and occurs at only one location. Therefore, the habitat is used to meet all essential life cycle requirements including seed dispersal processes, recruitment, etc Criterion (c). The extent to which the habitat is used by important populations. NB: An important population is one that is necessary for a species' long-term survival and recovery. This may include populations that are: key source populations either for breeding or dispersal, populations that are necessary for maintaining genetic diversity, and/or populations that are near the limit of the species range.
The only known population of Lepidium ginninderrense occurs in the habitat which occurs in the corner of Belconnen Naval Transmission Station in the suburb of Lawson in the Australian Capital Territory. Therefore, it is a key habitat for breeding, dispersal and the ongoing survival of Ginninderra Peppercress. Criterion (d). Whether the habitat is necessary to maintain genetic diversity and long-term evolutionary development. As 100% of the plants occur on this site, the habitat is critical to maintain genetic stock and potential long-term evolutionary developmentCriterion (e). Whether the habitat is necessary for use as corridors to allow the species to move freely between sites used to meet essential life cycle requirements.
N/A Criterion (f). Whether the habitat is necessary to ensure the long-term future of the species or ecological community through reintroduction or re-colonisation.Existing plants occurring in this habitat have a high seed set which allows for opportunities for translocation and ex - situ conservation and possibly re - colonisation. As 100% of the plants occur on this site, the habitat is critical to maintain genetic stock and potential long-term evolutionary development.Criterion (g). Any other way in which habitat may be critical to the survival of a listed threatened species or a listed threatened ecological community.
|Department of the Environment and Heritage (2005a). Map of Habitat Critical to the survival of Ginninderra Peppercress. [Online]. Canberra. Available from: http://www.environment.gov.au/biodiversity/threatened/critical-habitat/maps/ginninderra-peppercress.html.|
|Environment ACT (2003c). Draft Recovery Plan for Ginninderra Peppercress (Lepidium ginninderrense). Environment ACT. Canberra.|