environments as part of its lifecycle (Crook et al. 2006, Schmidt et al. 2011). It is likely that larvae of the Australian grayling drift downstream into the Western Port Ramsar Site, with return upstream migration in spring of juveniles . Maintaining connectivity between the marine environment and the rivers that drain into Western Port is essential for this threatened species. Figure : EWMA of Australian fairy tern at Western Port from 1981 to 2014 (data from Hansen et al. 2011 and Lacey and O’Brien 2015). Straight lines represent the 1% population threshold (15). Limits of Acceptable Change Summary of changes to the Limits of Acceptable Change Limits of Acceptable Change (LAC) for the Western Port Ramsar Site were reviewed with site managers and relevant technical experts. LAC fell into one of four categories: No change was made for Wetland bathymetry Geomorphology and sedimentation (no LAC set) Marine invertebrates (no LAC set) and Fish (no LAC set) No additional information is available to set LAC for geomorphology and sedimentation, marine invertebrates and fish. A change was made to the wording of the LAC to wording to make it more easily assessable, but numerical limit remains unchanged for Fauna-waterbirds New information resulted in a refinement or significant change to the LAC Flora – mangrove and Flora – saltmarsh A new LAC was set for critical CPS that formerly did not have a LAC defined Flora – seagrass and Supports threatened species Revised Limits of Acceptable Change The revised LAC are set out in the Table 24. The complete set of LAC for the site are shown in Table 25.
environments as part of its lifecycle (Crook et al. 2006, Schmidt et al. 2011). It is likely that larvae of the Australian grayling drift downstream into the Western Port Ramsar Site, with return upstream migration in spring of juveniles . Maintaining connectivity between the marine environment and the rivers that drain into Western Port is essential for this threatened species. Figure : EWMA of Australian fairy tern at Western Port from 1981 to 2014 (data from Hansen et al. 2011 and Lacey and O’Brien 2015). Straight lines represent the 1% population threshold (15). Limits of Acceptable Change Summary of changes to the Limits of Acceptable Change Limits of Acceptable Change (LAC) for the Western Port Ramsar Site were reviewed with site managers and relevant technical experts. LAC fell into one of four categories: No change was made for Wetland bathymetry Geomorphology and sedimentation (no LAC set) Marine invertebrates (no LAC set) and Fish (no LAC set) No additional information is available to set LAC for geomorphology and sedimentation, marine invertebrates and fish. A change was made to the wording of the LAC to wording to make it more easily assessable, but numerical limit remains unchanged for Fauna-waterbirds New information resulted in a refinement or significant change to the LAC Flora – mangrove and Flora – saltmarsh A new LAC was set for critical CPS that formerly did not have a LAC defined Flora – seagrass and Supports threatened species Revised Limits of Acceptable Change The revised LAC are set out in the Table 24. The complete set of LAC for the site are shown in Table 25.
Western-Port-Ramsar-Site-Management-Plan_revised.docx