v Government of Western Australia Department of the Premier and Cabinet Perth and Peel Green Growth Plan for 3.5 million Strategic Assessment of the Perth and Peel Regions Draft EPBC Act Strategic Impact Assessment Report Part D: MNES Assessment$IBQUFS December 2015 Acknowledgements This document has been prepared by Eco Logical Australia Pty Ltd and © Government of Western Australia Open Lines Consulting. Department of the Premier and Cabinet Disclaimer Dumas House This document may only be used for the purpose for which it was 2 Havelock Street commissioned and in accordance with the contract between Eco Logical Australia Pty Ltd and the Department of the Premier and West Perth WA 6005 Cabinet. The scope of services was defined in consultation with the Department of the Premier and Cabinet, by time and budgetary Website: www.dpc.wa.gov.au/greengrowthplan constraints imposed by the client, and the availability of reports Email: [email protected] and other data on the subject area. 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Strategic As sessment for the Perth and Peel Regions Contents List of Figures........................................................................................................................................................... ii List of Tables ........................................................................................................................................................... iii 18 Threatened ecological communities ........................................................................................................ 18-1 18.1 Summary .................................................................................................................................. 18-1 18.2 Introduction .............................................................................................................................. 18-3 18.3 Conservation outcome ............................................................................................................. 18-3 18.4 Baseline mapping for threatened ecological communities ....................................................... 18-4 18.5 Impact assessment approach for threatened ecological communities ..................................... 18-4 18.6 Aquatic Root Mat Community in Caves of the Swan Coastal Plain .......................................... 18-9 18.7 Assemblages of plants and invertebrate animals of tumulus (organic mound) springs of the Swan Coastal Plain .......................................................................................... 18-16 18.8 Claypans of the Swan Coastal Plain ...................................................................................... 18-26 18.9 Corymbia calophylla - Kingia australis woodlands on heavy soils of the Swan Coastal Plain .......................................................................................................................... 18-46 18.10 Corymbia calophylla - Xanthorrhoea preissii woodlands and shrublands of the Swan Coastal Plain ................................................................................................................ 18-59 18.11 Sedgelands in Holocene dune swales of the southern Swan Coastal Plain ........................... 18-71 18.12 Shrublands and Woodlands of the eastern Swan Coastal Plain ............................................ 18-90 18.13 Shrublands and Woodlands on Muchea Limestone of the Swan Coastal Plain ..................... 18-98 18.14 Thrombolite (microbialite) Community of a Coastal Brackish Lake (Lake Clifton) ................ 18-107 18.15 Thrombolite (microbial) community of coastal freshwater lakes of the swan coastal plain (lake richmond) ............................................................................................................ 18-114 List of Figures Figure 18-1: Relative levels of protection for Aquatic Root Mat Community occurrences (note, this is based on the number of occurrences, rather than area, as the total area of each occurrence is unknown) ............................................................................................................................................................. 18-13 Figure 18-2: Known occurrenes of the Aquatic Root Mat Community within the Strategic Assessment Area ..................................................................................................................................................................... 18-15 Figure 18-3: Relative levels of protection for Tumulus (organic mound) Springs of the Swan Coastal Plain occurrences ................................................................................................................................................ 18-21 Figure 18-4: Known occurrences of Tumulus Springs of the Swan Coastal Plain within the Strategic Assessment Area ................................................................................................................................................ 18-24 Figure 18-5: Relative levels of protection for Claypans of the Swan Coastal Plain occurrences ......................... 18-32 Figure 18-6: Known occurrences of Claypans of the Swan Coastal Plain within the Strategic Assessment Area ................................................................................................................................................ 18-44 ii Strategic As sessment for the Perth and Peel Regions Figure 18-7: Relative levels of protection for Corymbia calophylla - Kingia australis woodlands occurrences ......................................................................................................................................................... 18-51 Figure 18-8: Known occurrenes of Corymbia calophylla - Kingia australis woodlands within the Strategic Assessment Area ................................................................................................................................. 18-57 Figure 18-9: Relative levels of protection for Corymbia calophylla - Xanthorrhoea preissii woodlands and shrublands occurrences ............................................................................................................................... 18-64 Figure 18-10: Known occurrences of Corymbia calophylla - Xanthorrhoea preissii woodlands and shrublands within the Strategic Assessment Area............................................................................................... 18-69 Figure 18-11: Relative levels of protection for Sedgelands in Holocene Dune Swales occurrences ................... 18-76 Figure 18-12: Known occurrences of Sedgelands in the Holocene Dune Swales within the Strategic Assessment Area ................................................................................................................................................ 18-89 Figure 18-13: Relative levels of protection for Shrublands and woodlands of the Eastern Side of the Swan Coastal Plain occurrences ......................................................................................................................... 18-95 Figure 18-14: Known occurrenes of Shrublands and Woodlands of the Eastern Side of the Swan Coastal Plain within the Strategic Assessment Area ........................................................................................... 18-97 Figure 18-15: Relative levels of protection for Shrublands and Woodlands on Muchea Limestone occurrences ....................................................................................................................................................... 18-102 Figure 18-16: Known occurrenes of Shrublands and Woodlands on Muchea Limestone within the Strategic Assessment Area ............................................................................................................................... 18-105 Figure 18-17: Relative levels of protection for Lake Clifton Thrombolite Community occurrences .................... 18-111 Figure 18-18: Known occurrences of Lake Clifton Thrombolite Community within the Strategic Assessment Area .............................................................................................................................................. 18-113 Figure 18-19: Relative levels of protection for Lake Richmond Thrombolite community occurrences ............... 18-117 Figure 18-20: Known occurrenes of Lake Richmond Thrombolite Community within the Strategic Assessment Area .............................................................................................................................................. 18-119 List of Tables Table 18-1: Occurrences of threatened ecological communities in the Strategic Assessment Area ..................... 18-1 Table 18-2: Category 1 and 2 threatened ecological communities ........................................................................ 18-3 Table 18-3: Levels of protection (or risk) applied to occurrences of threatened ecological communities .............. 18-6 Table 18-4: