The Wetland Inventory for the Mount Lofty Ranges Documents a Representative Sample of Inland Wetlands by Recording Their Physical, Chemical and Biological Attributes
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WETLAND INVENTORY MOUNT LOFTY RANGES An assessment of selected wetlands for the Mount Lofty Ranges, encompassing the four metropolitan Catchment Water Management Boards This report may be cited as: Seaman, R.L. (2002) Wetland Inventory for the Mount Lofty Ranges. Department for Environment and Heritage. Author Russell Seaman Scientific Officer, Wetlands Management. National Parks and Wildlife SA Cartography and design Russell Seaman Photographs Russell Seaman Geographical Information System Data Supplied by Geographical Analysis and Research Unit, Planning SA, Department for Transport, Urban Planning and the Arts. The Department for Environment and Heritage, South Australia. Funding Sources National Action Plan for Salinity and Water Quality Native Vegetation Council of South Australia Torrens Catchment Water Management Board Patawalonga Catchment Water Management Board Onkaparinga Catchment Water Management Board Northern Adelaide and Barossa Catchment Water Management Board National Parks and Wildlife SA Acknowledgments In the preparation of this report the expertise, advice and support of several people is greatly appreciated. • Roman Urban, DEH. • Sandy Carruthers, Planning SA. • Tim Croft, DEH. • Steven Smith, Onkaparinga CWMB. • Keith Smith, Northern Adelaide and Barossa CWMB. • John Wood, Patawalonga and Torrens CWMB. • Simon Lewis, DEH. Wetland inventory report Executive Summary The Wetland Inventory for the Mount Lofty Ranges documents a representative sample of inland wetlands by recording their physical, chemical and biological attributes. Eighty-five wetlands were surveyed and included brackish water bodies, freshwater wetlands, bogs and constructed wetlands. The aquatic invertebrate fauna generally displayed good diversity and abundance in many of the wetlands surveyed. Fourteen wetlands recorded good invertebrate trophic levels and included Woorabinda Lake at Stirling, Mount George Wetlands at Bridgewater and Onkaparinga Estuary. Fourteen wetlands surveyed are considered to be nationally important by meeting the ANZECC criteria of being a good example of a wetland type occurring within a biogeographic region in Australia. These wetlands include Englebrook Reserve at Bridgewater, and the bogs within Cleland Conservation Park. Four wetlands are recommended for monitoring; these are Parafield Wetlands, Englebrook Reserve, Washpool Lagoon and Eurilla Bog. 3 Wetland inventory report SECTION ONE WETLAND INVENTORY .............................................................................................. 9 1.0 INTRODUCTION......................................................................................................................... 9 2.0 REPORT STRUCTURE .............................................................................................................. 9 3.0 PROJECT SCOPE.................................................................................................................... 10 4.0 OVERVIEW OF PAST WETLAND INVENTORY STUDIES..................................................... 10 5.0 WETLAND RISK ASSESSMENT ............................................................................................. 11 6.0 WETLAND INVENTORY METHODOLOGY............................................................................. 12 6.1 STUDY AREA BOUNDARIES............................................................................................................ 12 6.2 SITE SELECTION........................................................................................................................... 12 6.3 GIS DATABASE ........................................................................................................................... 12 7.0 WETLAND INVENTORY SURVEY.............................................................................................13 7.1 WETLAND SURVEY TEMPLATE ....................................................................................................... 13 SECTION TWO WETLAND ASSESSMENT FOR THE MOUNT LOFTY RANGES ........................... 14 8.0 INTRODUCTION....................................................................................................................... 14 8.1 WETLAND OVERVIEW ................................................................................................................... 14 9.0 WETLAND LAND USE ............................................................................................................. 15 9.1 BACKGROUND ............................................................................................................................. 15 9.2 ANALYSIS .................................................................................................................................... 15 10.0 TENURE AND MANAGEMENT AUTHORITY ......................................................................... 16 10.1 BACKGROUND ......................................................................................................................... 16 10.2 ANALYSIS ................................................................................................................................16 11.0 ENVIRONMENTAL ASSOCIATIONS AND IBRA REGIONS .................................................. 17 11.1 BACKGROUND ......................................................................................................................... 17 11.2 ANALYSIS ................................................................................................................................17 12.0 KEY BIODIVERSITY AREAS ................................................................................................... 20 12.1 BACKGROUND ......................................................................................................................... 20 12.1.1 Large remnant areas ..................................................................................................... 20 12.1.2 Threatened habitat areas .............................................................................................. 20 12.1.3 Fragmented habitat areas ............................................................................................. 21 12.2 ANALYSIS ............................................................................................................................... 21 13.0 WETLAND AREA ..................................................................................................................... 22 13.1 BACKGROUND ......................................................................................................................... 22 13.2 ANALYSIS ................................................................................................................................22 14.0 LANDFORM ELEMENT............................................................................................................23 14.1 BACKGROUND ......................................................................................................................... 23 14.2 ANALYSIS ................................................................................................................................23 15.0 GEOLOGY ................................................................................................................................ 24 15.1 BACKGROUND ......................................................................................................................... 24 15.2 ANALYSIS ................................................................................................................................24 16.0 HYDROLOGY ........................................................................................................................... 24 16.1 BACKGROUND ......................................................................................................................... 24 16.2 ANALYSIS ................................................................................................................................24 4 Wetland inventory report 17.0 FLORA ANALYSIS BY CATCHMENT..................................................................................... 25 17.1 NORTHERN ADELAIDE AND BAROSSA CATCHMENT WATER MANAGEMENT BOARD....................... 25 17.1.1 Remnant vegetation distribution.................................................................................. 25 17.1.2 Floristic vegetation within or adjacent to waterbodies................................................. 25 17.1.3 Vegetation associations at survey sites ..................................................................... 26 17.1.4 Plants of conservation significance within survey sites............................................... 26 17.2 TORRENS CATCHMENT WATER MANAGEMENT BOARD............................................................... 28 17.2.1 Remnant vegetation distribution.................................................................................. 28 17.2.2 Floristic vegetation within or adjacent to waterbodies................................................. 28 17.2.3 Vegetation associations at survey sites ..................................................................... 28 17.2.4 Plants of conservation significance within surveyed wetlands.................................... 28 17.3 PATAWALONGA CATCHMENT WATER MANAGEMENT BOARD....................................................... 29 17.3.1 Remnant vegetation distribution.................................................................................