Wetlands in the Clarence Lowlands IBRA Subregion
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SEPTEMBER 2008 Conservation Assessment of Wetlands in the Clarence Lowlands IBRA Subregion Department of Environment and Climate Change NSW has compiled this document in good faith, exercising all due care and attention. The State of NSW and DECC do not accept responsibility for inaccurate or incomplete information. Readers should seek professional advice when applying this information to their specific circumstances. Published by: Department of Environment and Climate Change NSW 59–61 Goulburn Street Sydney PO Box A290 Sydney South 1232 Phone: (02) 9995 5000 (switchboard) Phone: 131 555 (environment information and publications requests) Fax: (02) 9995 5999 TTY: (02) 9211 4723 Email: [email protected] Website address: www.environment.nsw.gov.au The Department of Environment and Climate Change NSW is pleased to allow this material to be reproduced in whole or in part for educational and non-commercial use, provided the meaning is unchanged and its source, publisher and authorship are acknowledged. ISBN 978 1 74232 017 5 December 2008 DECC 2008/564 Clarence Lowlands Wetland Conservation Assessment EXECUTIVE SUMMARY This project was funded by the Australian Department of the Environment, Water, Heritage and the Arts (DEWHA). The objective of the project was to undertake a conservation assessment of wetlands in the Clarence Lowlands IBRA subregion in order to make recommendations for their management and protection that may contribute to improving the comprehensiveness, adequacy and representativeness of the National Reserve System (NRS). The NSW Department of Environment and Climate Change (DECC) were engaged to complete this project, which included a desktop conservation assessment and expert panel workshop to identify priority wetland areas and to direct the future development of the NRS. This report was prepared by Eco Logical Australia, in collaboration with DECC, and provides findings from an assessment of the conservation values and threats to 19 wetland complexes (clusters). These wetland clusters represent a significant proportion of the remaining high conservation value aquatic ecosystems in the Clarence Lowlands. A major component of the assessment was an expert panel workshop. Representatives from local councils, government agencies, conservation groups and independent ecologists were invited to attend a workshop in Grafton, NSW on Tuesday 19 August 2008. In combination with a desktop assessment this provided the best level of information available on each wetland cluster, which is detailed in 19 individual wetland profiles (Appendix 3). This report documents a number of wetland ecosystems which are considered to be a very high priority for addition to the NRS. This includes estuarine and intertidal areas such as the Clarence Estuary, Richmond Estuary and The Broadwater, and freshwater swamp and forested wetland areas such the Bungawalbin, Shark Creek, Everlasting Swamp, Tabbimoble, and Wardell wetland clusters. Throughout the project a range of limitations were identified due to the lack of a standardised approach to wetland mapping and classification. This is exacerbated by the absence of comprehensive field survey data for wetlands in the Clarence Lowlands. To enhance future assessments of the comprehensiveness, representativeness and adequacy of the wetlands and lowlands protected area system in the Clarence Lowlands IBRA subregion systematic mapping and survey is therefore recommended Additionally, the criteria used for future wetland assessments should be reviewed and appropriate decision support tools (eg Expert Choice) be used to determine wetland priorities. Strategically, introduction of long term wetland monitoring sites and identification of a system of wetland and lowland corridors and key habitats are also recommended. i Clarence Lowlands Wetland Conservation Assessment ACKNOWLEDGEMENTS This document has been prepared by Eco Logical Australia Pty Ltd in collaboration with the NSW Department of Environment and Climate Change (DECC). This report was funded by the Australian Department of the Environment, Water, Heritage and the Arts (DEWHA) National Reserve System Program. The study team included Mike Rowland, Paul Sheringham, Hugh Robertson, Andrew Steed, Mick Andren and Joanna Muldoon (DECC) and Sarah Wain, Julian Wall, Martin Stuart and Phil Gilmour (Eco Logical Australia). The contribution of participants at the expert panel workshop held in Grafton, NSW on 19 August 2008 is particularly acknowledged. ii Clarence Lowlands Wetland Conservation Assessment CONTENTS EXECUTIVE SUMMARY........................................................................................................................ I ACKNOWLEDGEMENTS ..................................................................................................................... II CONTENTS ........................................................................................................................................ III 1. INTRODUCTION..................................................................................................................... 1 1.1 DESCRIPTION OF PROJECT ............................................................................................................... 1 1.2 CONTEXT ........................................................................................................................................ 1 1.3 STUDY AREA.................................................................................................................................... 2 1.4 WETLAND CLUSTERS FOR INVESTIGATION........................................................................................... 5 2. PROJECT BACKGROUND...................................................................................................... 8 2.1 EXISTING STUDIES ............................................................................................................................. 8 2.2 RESTORATION PROJECTS ................................................................................................................ 10 2.3 NSW PLANNING CONTEXT ............................................................................................................ 10 2.4 NATIONAL AND INTERNATIONAL PLANNING CONTEXT...................................................................... 13 3. CONSERVATION VALUES AND THREATS............................................................................. 16 3.1 CONSERVATION VALUES................................................................................................................ 16 3.2 THREATS ........................................................................................................................................ 21 4. CONSERVATION VALUES AND THREATS ASSESSMENT ....................................................... 24 4.1 INTRODUCTION.............................................................................................................................. 24 4.2 ASSESSMENT METHODOLOGY ........................................................................................................ 24 4.3 OUTCOMES OF CONSERVATION VALUES AND THREATS ASSESSMENT................................................. 28 4.4 DISCUSSION ON LIMITATIONS OF ASSESSMENT.................................................................................. 34 5. RECOMMENDATIONS ......................................................................................................... 35 5.1 KEY PRIORITY AREAS FOR THE NATIONAL RESERVE SYSTEM................................................................ 35 5.2 CONSIDERATION OF CLIMATE CHANGE IN SETTING PRIORITIES .......................................................... 36 5.3 APPLICATIONS OF STUDY ................................................................................................................ 36 5.4 FUTURE PROJECTS.......................................................................................................................... 36 6. REFERENCES........................................................................................................................ 38 APPENDIX 1 - RESTORATION PROJECTS.......................................................................................... 40 APPENDIX 2 – EXPERT WORKSHOP OUTCOMES.............................................................................. 43 APPENDIX 3 – WETLAND PROFILES .................................................................................................. 45 ALUMY CREEK/BUNYIP CREEK.............................................................................................................. 45 BUNGAWALBIN ...................................................................................................................................... 48 CASINO ................................................................................................................................................... 51 CHAFFIN SWAMP ................................................................................................................................... 54 CLARENCE ESTUARY.............................................................................................................................. 57 COLDSTREAM......................................................................................................................................... 61 COUTTS CROSSING/ORARA RIVER ....................................................................................................