Byron Flora and Fauna Study 1999 - Byron Shire Council

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BYRON FLORA AND FAUNA STUDY, 1999 Table 5.1 Definitions – TSC Act status (Threatened Species Conservation Act, 1995). X Presumed extinct (X) Schedule 1 Part 4 Species not recorded in NSW for at least 50 years E Endangered (E) Schedule 1 Part 1 Species that are likely to become extinct in NSW unless action is taken to stop their decline V Vulnerable Schedule 2 Species that are likely to become Endangered in NSW unless action is taken to stop their decline Table 5.2 Definitions – ROTAP status (Rare or Threatened Australian Plants), after Briggs and Leigh (1996) 1, 2 Distribution (1, 2 or 3) (1) The taxon is known from only one collection; or 3 (2) The geographic range of the taxon in Australia is less than 100 km; (3) The geographic range of the taxon in Australia is greater than 100 km; X (X) Presumed extinct Taxon not collected or otherwise verified over the past 50 years despite thorough searching in all known likely habitats, or of which all known wild populations have been destroyed more recently; E (E) Endangered Taxon in serious risk of disappearing from the wild within 10- 20 years if present land use and other threats continue to operate. This category includes taxa with populations possibly too small (usually less than 100 individuals) to ensure survival even if present in proclaimed reserves; V (V) Vulnerable Taxon not presently Endangered, but at risk over a longer period (20-50 years) of disappearing from the wild through continued depletion, or which occurs on land whose future use is likely to change and threaten its survival; R (R) Rare Taxon which is rare in Australia (and hence usually in the world) but which currently does not have any identifiable threat. Such species may be represented by a relatively large population in a very restricted area or by smaller populations spread over a wide range or some intermediate combination of distribution pattern; K (K) Poorly known Taxon that is suspected, but not definitely known, to belong to one of the other threat categories (Presumed Extinct, Endangered, Vulnerable, Rare). At present, accurate field distribution data information is inadequate; C Reservation status and (C) Reserved: indicates taxon has at least one population (a, i size class of all within a National Park, other proclaimed conservation reserve or -) reserved populations or in an area otherwise dedicated for the protection of flora. (C, a, i or -) The taxon may or may not be considered adequately conserved within the reserve(s), as reflected by the conservation status assigned to it. Where applicable, the ‘C’ symbol immediately follows the conservation status symbol in the written code; (a) 1000 plants or more are known to occur within a conservation reserve(s); (i) less than 1000 plants are known to occur within a conservation reserve(s); (-) reserved population size is not accurately known; (t) total known population reserved; Overseas occurrence (+) - included if the taxon has a natural occurrence overseas). 63
A GREENPRINT FOR A SUSTAINABLE FUTURE Table 5.3 Definitions – Regionally significant species, after Sheringham and Westaway (1995) (ranked in order of level of rarity where possible. Categories 7-9 equal ranking) 1 Nationally Rare or Taxa included on the current working list of Rare or Threatened Threatened Australian Plants (ROTAP) (Briggs and Leigh 1988, September 1994 in prep). Note: The ROTAP working list has now been updated (Briggs and Leigh 1996). See Table 5.2 2 Uncommon throughout Taxa which occur in Upper North East NSW that have small distribution populations and/or are sparsely distributed over their known Australian range and that may be inadequately reserved. Criteria for selection: Few confirmed locality records for the taxon throughout its recorded distribution. May include taxa worthy of consideration for ROTAP listing, or previously listed species which have subsequently been removed. 3 Rare in NSW Taxa which occur in Upper North East NSW with small populations and sparse distributions within this state. Criteria for selection: Fewer than five known localities for the taxon in NSW; the taxon may be more common elsewhere in its distribution. 4 Regionally Uncommon Taxa that are uncommon in Upper North East NSW, but are common or widespread elsewhere; taxa not listed in 1-3 above. Criteria for selection: Fewer than five known localities for the taxon in the region, with restricted distributions and small population sizes. 5 Depleted habitat /Sparse Sparse taxa not falling into categories 1-4 but which occur in habitats that have been extensively cleared or modified. These taxa are not well-recorded in plot-based surveys in the region and may be under-represented in conservation planning exercises based on coarse filter sampling. Criteria for selection: Fewer than twenty records in Upper North East NSW, and restricted to habitats that are threatened with ongoing depletion and degradation. 6 Endemic Taxa with presently known distribution entirely within Upper North East NSW. Criteria for selection: All records for species confined to Upper North East NSW Audit region. 7 Disjunct Taxa either with population(s) remote from other populations within Upper North East NSW or taxa whose distributional stronghold is remote from the population(s) within the Audit region. Criteria for selection: Nearest populations are more than 100 km away. 8 Distributional limit Taxa reaching the limit of their natural geographic distribution in Upper North East NSW (8N northern limit; 8S southern limit). 9 Atypical habitat Taxa which include populations occurring in habitats not normally recorded for that species. 64
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Byron Flora and Fauna Study 1999 - Byron Shire Council

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