Table 9 population summary for acanthornis magna

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Table 9. Population summary for Acanthornis magna greeniana on King Island Locati on Tenure NRM regio n 1:25 000 mapshe et Year last (first) seen Area of habitat (ha) Number of mature individual s 1 Nook Swamp s Lavinia State Cradl e Egg Lagoon 2011 1 (late 600 (pre-2007 50 3 King Island Biodiversity Management Plan 152
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Reserve Coast 1960s) fire) 1 50 (post-2007 fire) 1 2 Colliers Colliers Swamp Conservat ion Area Cradl e Coast Stokes 2004 2 (late 1960s) 150 unknown 1. Donaghey (2011) 2 KINRMG 2003–2004 3 Garnett et al. (2011) Threats and Management Known and potential threats to Acanthornis magna greeniana on King Island include: very small population size; genetically isolated subpopulations; loss of genetic diversity; land clearance; drainage of swamp forest; wildfire; predation by cats and rats; disease epidemics. Substantial areas of King Island have been cleared for agricultural purposes and artificially drained since European settlement, primarily for the production of dairy cattle. The net result has been the loss and fragmentation of suitable habitat for Acanthornis magna greeniana, resulting in a significant decline in range and abundance since European settlement. Remaining populations of Acanthornis magna greeniana are vulnerable to catastrophic events such as extensive wildfire or disease epidemics. It has also been suggested that ticks may be a threat to Acanthornis magna greeniana (Garnett & Crowley 2000). The vulnerability of the species to wildfire is highlighted by the loss through fire of over 60% of potential habitat at Nook Swamp (Donaghey 2011). Prior to the 2007 fire, Nook Swamp was the largest remaining area of swamp forest habitat for Acanthornis magna greeniana (600 ha), and preventing wildfire at Nook Swamps was highlighted by Donaghey (2003) as the highest-priority management action for the species on the island. The 2007 fire has resulted in the long-term, and in some areas permanent loss of mature swamp forest for Acanthornis magna greeniana at Nook Swamps (RMCD 2007). Recovery Actions specific to King Island Provide information and extension support to the King Island Natural Resource Management committee, King Island council, Government agencies and the local community on the location, significance and management of known subpopulations and areas of potential habitat (Actions 27.1-3, 27.5, 27.6, 28, 29.1); Protect Nook Swamps, Colliers Swamp and other current and potential subpopulations from wildfire (Action 20.3); Undertake a post-fire survey of Nook Swamp to determine population size, distribution and habitat, and re-use of areas burnt in 2007 (Action 20.1); King Island Biodiversity Management Plan 153
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Undertake searches of sites where Acanthornis magna greeniana was previously known to occur (Pass River, Yellow Rock, Pegarah State Forest) (Action 20.1); Undertake systematic searches of other potential sites (Bungaree Swamp, Red Hut Point area) (Action 20.1); Identify conservation actions for new sites and implement (Action 20.2); Continue and strengthen current measures for the retention and rehabilitation of remaining wet forest and swamp forest vegetation on King Island (Actions 1.1-1.6);
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  • Fall '14
  • The Hours, ........., Threatened species, Bass Strait, Environment Protection and Biodiversity Conservation Act 1999, King Island

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