Tender for the Programme - South West Catchments Council

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DRAFT South West Regional NRM Strategy – Ancillary Document 4. Historical perspective A brief overview of assets and threats identified by NRM stakeholders over the past decade or more is presented in this section. This information, while not directly relevant to the current strategy, has been included to provide the historical context for the current strategy, which has been developed based on a review of this information combined with updates provided by the broader NRM community (including agency staff, NRM professionals and community members). A wide range of documents was consulted to determine this historical background about NRM priorities, including key documents that provided information at a catchment level (BBG 2004, CCCG 2007, Geocatch 2008, LCC 2007, PHCC 2005 and WCC 2011), regional level (Ecosystem Solutions 2008, SWCC 2005) and State level (Stuart-Street 2003, State NRM Office 2007). Water Quality Improvement Plans (WQIPs) also provided key information. 4.1 Biodiversity 4.1.1 Previously identified priority biodiversity assets The following six biodiversity asset categories were assigned regional priority in the previous strategy (SWCC 2005): Declared Rare Flora (CR, EN); Gazetted Threatened Fauna; Threatened Ecological Communities (CR, EN); Ramsar wetlands; Conservation Reserves in the Avon-Wheatbelt and Mallee bioregions; and Other land managed for conservation in the Avon-Wheatbelt and Mallee bioregions. At a catchment level, priority assets were identified by six community catchment groups as follows: Blackwood River Catchment All TECs. Natural Diversity Recovery Catchments, e.g. Lake Toolibin. Lower Blackwood ecological communities, e.g. Scott River plain. Avon Wheatbelt and Mallee conservation reserves. All “Critically endangered”, “Endangered” and “Estuarine dependent” species. Avon Wheatbelt 1 & 2 Vegetation systems – Beaufort, Bridgetown, Broomehill, Dumbleyung, Scott River, Wagin and Williams Cape to Capes Catchment All biodiversity assets of the region listed in the strategy, but not prioritized. The following were identified (but needs to be expanded): All TECs. All Declared Rare Flora and Threatened Fauna species. Geographe Catchment 5 TECs: o Heaths on SW coastal granites; o Swan Coastal Plain (SCP) Community 1b – Corymbia calophylla woodlands; o SCP Community 2 - Southern wet shrublands; o SCP Community 10a - Shrublands on dry clay flats; and o SCP Community 10b - Shrublands on southern ironstones. 8 species - Western Ringtail Possum, Quenda, Brush-tailed Phascogale, Chuditch, Water Rat, and Baudin’s, Carnaby’s and Red-tailed Black Cockatoos. Leschenault Catchment Threatened flora (21 species). Fauna including Western Ringtail Possum; Quenda; Brush-tailed Phascogale; Water rat; Baudin’s, Peel-Harvey Catchment 38 TECs. All Declared Rare Flora and Threatened Fauna species. Yalgorup National Park. Warren Catchment Avifauna Granite outcrops Marron, salamanderfish and lamprey eel 40
DRAFT South West Regional NRM Strategy – Ancillary Document Carnaby’s and Red-tailed Black Cockatoos; migratory shorebirds; all native freshwater crayfish and some native freshwater fish (incl. pouched lamprey). TECs (Community types 3c, 7, 8, 9, 18 and 19). Other ecological communities (7 including the White Mangrove). Various wetlands, including Leschenault Estuary, Kemerton wetland chain and billabongs along Collie River. Eastern estuary nature reserves. Dryandra Reserve. Migratory shorebirds. Remnant vegetation. Microbial mats (Lake Preston). Mt Chudalup Native fauna Native flora Peat swamps Yeagarup Dunes Ecosystem Solutions (2009) refined this information, assigning priority ranking on the basis of 38 criteria in the following five groupings: Richness (2 criteria); Rarity (22 criteria); Distinctiveness (3 criteria); Representativeness (9 criteria); and Naturalness (2 criteria). Eight bio-landscapes were then identified as the highest value biodiversity assets in the South West NRM region that would protect priority fauna and/or flora species/communities, in addition to rare and/or endangered vegetation associations. A further 11 assets of secondary priority were also identified that contained only priority fauna and/or flora species. In the current strategy, aquatic biodiversity has been separated out from terrestrial biodiversity, as aquatic fauna and flora have generally been under-represented in past documents and are subject to different issues and management options. Indeed, aquatic biodiversity assets haven’t been identified as a specific theme area at either State, regional or catchment level, but a number of priority assets are listed in various documents that can be included in this theme area. They include: All “Critically endangered”, “Endangered” and “Estuarine dependent” aquatic species. Aquatic fauna including all native freshwater fish and crayfish, with priority given to Margaret River freshwater crayfish, Dunsborough freshwater crayfish, Balston’s Pygmy Perch and the lamprey eel. Very little is known about most aquatic species, so this list will undoubtedly be expanded at various levels as time goes on. 4.1.2 Previously identified threats to the region’s terrestrial biodiversity The following threats were identified as key threats for biodiversity in the six IBRA regions represented in the South West (State NRM Office 2007, Ecosystem Solutions 2009 – high-level threats are shown in bold): Climate change; Dieback (Phytophthora spp); Decreasing rainfall (drought); Fire (including inappropriate fire management regimes); Environmental weeds (Category A) and introduced animals (cats, European fox, rabbits); Problem species (introduced and native – European Honey Bee, Kookaburra, Minahs, Galahs, Corellas); Habitat fragmentation and/or isolation; 41
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Tender for the Programme - South West Catchments Council

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