Biodiversity Strategy - Gosford City Council - NSW Government
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Biodiversity Strategy - Gosford City Council - NSW Government

Biodiversity Strategy - Gosford City Council - NSW Government Biodiversity Strategy - Gosford City Council - NSW Government

gosford.nsw.gov.au
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01.01.2014 Views

Biodiversity - Technical Report Page 103

There have been few quantitative studies of the condition of native vegetation in Gosford City. A report on the COSS found that 20% of the total COSS lands (at that time 2,000ha) were impacted by weeds (Manidis Roberts 1992). The Gosford Rainforest Study (Payne 2002) found that lantana had increased significantly since 1987, and that where previously a few metres existed at the rainforest edge, that this was now well over 100 metres in depth in some areas. Condition mapping (i.e. extent of tracks and clearing, bush fire or other regrowth) is not available for the Gosford study at this stage, nor is there any mapping describing the extent of weed invasion. A - 5.2.3 Significant Vegetation Communities Vegetation mapping enables an assessment to be made about the extent and proportion of native vegetation communities and their relative conservation significance, this is best done within a regional context. The Regional Biodiversity Conservation Strategy (LHCCREMS 2003) provides a conservation assessment for the region, considering national, state and local significant vegetation communities. For national significance, no locally occurring vegetation communities have been listed so far under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999. However, Environment Australia provides criteria to identify communities that could qualify under this category. The Regional Biodiversity Conservation Strategy assessed all regional vegetation communities against national criteria (see Table 5.6) and identified a number of communities that would qualify for national significance. Of the communities identified, only Beach Spinifex (Map Unit 53) and Alluvial Tall Moist Forest (Map Unit 5) are not now likely to be covered under the new determinations for endangered ecological communities at NSW State level. Figures 5.2 – 5.4 Dune vegetation protects foreshore dunes and provides habitat for species such as the coastal pigface (Carpobrotus glaucescens) and coastal wattle (Acacia sophorae) (R. Lonie). Table 5.6 Criteria for assessing national significance CRITERIA Ctiterion 1 Critically endangered = very severe decline = 95% or more (1C) Endangered = a severe decline = 90% or more (1E) Vulnerable - substantial decline = 70% or more (1V) Criterion 2 REASON FOR SIGNIFICANCE Decline in geographic distribution Small geographic distribution coupled with demonstrable threat. This category applies only to vegetation communities with distributions that are small on a national scale. Biodiversity - Technical Report Page 104

<strong>Biodiversity</strong> - Technical Report Page 103

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