E1: Limits of Acceptable Change for the Jocks Lagoon Ramsar Site. Critical Baseline information Limit of acceptable change (LAC)* Justification and Comments Confidence component, process or service Wetland The baseline information used in The limits of acceptable change for the wetland There are no data on the variability of the Low-medium vegetation this assessment is the vegetation are that over a ten year period: wetland habitat types and, until this ECD, habitat types map produced as part of this ECD no more than ten percent reduction in there was no mapping of the wetland types. (Figure 2) wetland Ts (sedgeland marsh) These limits have been set as a common and U (peat sedgeland and teatree). sense approach to defining a significant loss Areas for Ts and U are 1.0 and 0.8 in wetland types. The second limit combines hectares, respectively. the standing water habitat with the sandy no more than ten percent loss in the shores, as when the standing water (type K) combined area of wetland K reduces during drought, it exposes the (coastal freshwater lagoon) and E sandy shores of the site (type E). As the map (sandy shores and dune slacks). Areas was made without proper field surveying, it for K and E are 4.4 and 2.2 hectares, will need verification. respectively. Rare plant The only baseline information Presence in two out of three surveys over a ten There is no quantitative information on any Low species available is that two rare species year period of: of these species within the site. Therefore were recorded as being at the site quantitative limits of acceptable change jointed twigsedge (Baumea articulata) at the time of designation and a cannot be set and a qualitative LAC based slender twigsedge (Baumea gunnii) further three species were on presence / absence of these five species identified during site inspections for is provided. zigzag bogsedge (Schoenus brevifolius) this ECD yellow onion orchid (Microtidium atratum) marshflower (Villarsia exaltata).
E1: Limits of Acceptable Change for the Jocks Lagoon Ramsar Site. Critical component, process or service Baseline information Limit of acceptable change (LAC)* Justification and Comments Confidence Wetland vegetation habitat types The baseline information used in this assessment is the vegetation map produced as part of this ECD (Figure 2) The limits of acceptable change for the wetland are that over a ten year period: no more than ten percent reduction in wetland Ts (sedgeland marsh) and U (peat sedgeland and teatree). Areas for Ts and U are 1.0 and 0.8 hectares, respectively. no more than ten percent loss in the combined area of wetland K (coastal freshwater lagoon) and E (sandy shores and dune slacks). Areas for K and E are 4.4 and 2.2 hectares, respectively. There are no data on the variability of the wetland habitat types and, until this ECD, there was no mapping of the wetland types. These limits have been set as a common sense approach to defining a significant loss in wetland types. The second limit combines the standing water habitat with the sandy shores, as when the standing water (type K) reduces during drought, it exposes the sandy shores of the site (type E). As the map was made without proper field surveying, it will need verification. Low-medium Rare plant species The only baseline information available is that two rare species were recorded as being at the site at the time of designation and a further three species were identified during site inspections for this ECD Presence in two out of three surveys over a ten year period of: jointed twigsedge (Baumea articulata) slender twigsedge (Baumea gunnii) zigzag bogsedge (Schoenus brevifolius) yellow onion orchid (Microtidium atratum) marshflower (Villarsia exaltata). There is no quantitative information on any of these species within the site. Therefore quantitative limits of acceptable change cannot be set and a qualitative LAC based on presence / absence of these five species is provided. Low
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