Threatened Species Unit, North East Branch
New South Wales Department of Environment and Conservation, 2004
ISBN: 174122 135 8
7. Management Issues
- Guy Fawkes River National Park
- Chambigne Nature Reserve
- Enmore-Oxley Wild Rivers National Park
The threats operating or potentially operating at each of the five population locations differ in their type, extent and severity, however, the major threat that affects or is likely to affect all populations is inappropriate fire frequency. Other known and potential threats include grazing, small population size, seed predation and illegal collection.
The eastern population is threatened, in order of importance, by:
- too frequent fires;
- small population size;
- damage to plants by cattle; and
- illegal harvesting of plant material for propagation.
The western population is threatened primarily by inappropriate fire regimes. However the location of the population on a cliff line above the river greatly reduces this threat. The small population size is also an inherent long term threat.
Sections of these populations are threatened by:
- low fire frequency; and
- possible grazing by goats.
Much of the area where Grevillea beadleana occurs at Binghi is on leasehold land and if the current lessees change, then the population could be jeopardised by unsympathetic management practices. Another possible threat is tin mining and fossicking, which occur throughout the region.
This population is threatened, in order of importance, by:
- lack of recruitment;
- small population size;
- too frequent fires; and
- uncertain neighbour attitudes.
The Enmore-Oxley Wild Rivers National Park population is potentially threatened by inappropriate fire regimes (L. Copeland pers. comm.). However the evidence of recent recruitment and large adult plants indicates that this threat is not currently severe. Further investigations of the site are required to make a full assessment of current and potential threats.
If a conservation agreement could be negotiated in the Binghi area, then the associated benefits would include protection of several other rare plant species; Prostanthera staurophylla, Hibbertia sp. aff obtusifolia, Acacia torringtonensis, A. granitica and Persoonia terminalis ssp. terminalis as well as the Eucalyptus prava - E. subtilior - E. andrewsii association, which is not represented in any conservation reserve.
The protection of Grevillea beadleana at Guy Fawkes River National Park from too frequent fires and uncontrolled grazing by stock will allow sympatric species to regenerate which in turn may benefit the Brush-tailed Rock Wallaby (Petrogale penicillata ) and Glossy Black-Cockatoo (Calyptorhynchus lathami), both listed as Vulnerable under the NSW TSC Act.
The Chambigne Nature Reserve area contains important populations of Melichrus hirsutus, an Endangered Species, one undescribed species (Bertya sp. nov.), one rare species (Dodonaea hirsuta) and one poorly known species (Eucalyptus psammitica) (Sheringham & Westaway 1995). It is likely that there are a number of fauna species, including the Vulnerable Species Brush-tailed Rock Wallaby, present in the area.
At the Enmore-Oxley Wild Rivers National Park population, one Endangered Species (Eucalyptus magnificata) and two ROTAP species have been found, including E. youmanii and Acacia ingramii. Other threatened flora possibly occurring in the area include E. nicholii. The discovery of a new plant species Zieria sp. nov is significant as this species is likely to be restricted to the area (L. Copeland pers. comm.).