Ecological Character Description
Total Page:16
File Type:pdf, Size:1020Kb
Glenelg Estuary and Discovery Bay Ramsar Site Ecological Character Description Acknowledgements This document was informed by the following technical working group participants: Gavin Prentice, Jarred Obst, Helen Arundel and Stephen Ryan (Glenelg Hopkins Catchment Management Authority), David Ryan, Marcel Hoog Antink and Don Tumney (Parks Victoria), David Pitts, Rachel Pritchard and Garry Peterson (DELWP), Mark Bachmann, Lachlan Farrington, Lauren Veale and Bryan Haywood (Nature Glenelg Trust), Maureen Christie (Birdlife South East SA), Golo Mauer (formerly Birdlife Australia), Nelson Coastcare Group, local landholders and the Nelson and Tarragal communities. In addition, Damein Bell, Gunditj Mirring Traditional Owner Aboriginal Corporation, provided guidance in relation to indigenous values. The Commonwealth Department of Environment and Energy provided valuable feedback during document development. Leila Huebner provided key reference material, historical correspondence regarding restoration of Long Swamp, technical input at workshops, and the list of wetland plant species presented in Appendix D, her contributions were invaluable. We also acknowledge the authors of publications referenced in this document for additional information and advice provided. Symbols for diagrams courtesy of the Integration and Application Network (ian.umces.edu/symbols), University of Maryland Centre for Environmental Science. Authors Butcher, R., Hale, J., Brooks, S. and Cottingham, P. Citation Department of Environment, Land, Water and Planning (2017 ). Ecological Character Description for Glenelg Estuary and Discovery Bay Ramsar Site. Department of Environment, Land, Water and Planning, East Melbourne, Victoria. Steering committee membership The steering committee was comprised of the following: Gavin Prentice, Helen Arundel and Adam Bester (Glenelg Hopkins Catchment Management Authority), Andrea White and Peter Lawson (DELWP), Bernadette Hoare (Parks Victoria) and the Commonwealth Department of Environment and Energy. Photo credit Bridgewater Lakes R. Butcher © The State of Victoria Department of Environment, Land, Water and Planning 2017 This work is licensed under a Creative Commons Attribution 4.0 International licence. You are free to re-use the work under that licence, on the condition that you credit the State of Victoria as author. The licence does not apply to any images, photographs or branding, including the Victorian Coat of Arms, the Victorian Government logo and the Department of Environment, Land, Water and Planning (DELWP) logo. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ ISBN 978-1-76047-943-5 (pdf/online) Disclaimer This publication may be of assistance to you but the State of Victoria and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication. Accessibility If you would like to receive this publication in an alternative format, please telephone the DELWP Customer Service Centre on 136186, email [email protected], or via the National Relay Service on 133 677 www.relayservice.com.au. This document is also available on the internet at www.delwp.vic.gov.au. Contents Glossary ........................................................................................................................................................... 4 Abbreviations ................................................................................................................................................... 7 Executive summary ......................................................................................................................................... 8 1 Introduction .................................................................................................................................. 13 1.1 Site details .................................................................................................................................... 13 1.2 Statement of purpose .................................................................................................................. 13 1.3 Relevant treaties legislation and regulations ........................................................................... 15 1.4 Preparing the ECD ....................................................................................................................... 17 2 General Description of the Glenelg Estuary and Discovery Bay Ramsar Site ...................... 18 2.1 Location ........................................................................................................................................ 18 2.2 Overview of the site ..................................................................................................................... 19 2.3 Wetland types .............................................................................................................................. 21 2.3.1 Freshwater wetlands ................................................................................................................... 21 2.3.2 Glenelg Estuary ........................................................................................................................... 21 2.3.3 Beach and dune system ............................................................................................................. 22 2.3.4 Ramsar wetland types ................................................................................................................. 23 2.4 Ramsar criteria ............................................................................................................................ 27 3 Components, processes, services and benefits ...................................................................... 34 3.1 Definitions .................................................................................................................................... 34 3.2 Identifying critical components and processes ....................................................................... 34 3.3 Supporting components and processes ................................................................................... 36 3.3.1 Climate .......................................................................................................................................... 36 3.3.2 Geomorphic setting ..................................................................................................................... 38 3.3.3 Water quality ................................................................................................................................ 40 3.3.4 Vegetation community: Dune scrub ......................................................................................... 41 3.4 Critical components .................................................................................................................... 42 3.4.1 Hydrology ..................................................................................................................................... 43 3.4.2 Vegetation type and extent ......................................................................................................... 49 3.4.3 Fish diversity and abundance .................................................................................................... 55 3.4.4 Waterbird diversity and abundance .......................................................................................... 56 3.5 Critical processes ........................................................................................................................ 58 3.5.1 Stratification ................................................................................................................................. 58 3.6 Cultural services .......................................................................................................................... 61 3.6.1 Gunditj Mirring Traditional Owners Statement of Continuing Connection and Commitment ................................................................................................................................................... 61 3.6.2 South East Aboriginal Focus Group – Statement of Connection ........................................... 62 3.6.3 Recreation and tourism .............................................................................................................. 63 3.7 Critical supporting services ....................................................................................................... 63 3.7.1 Supports a diversity of wetland types ....................................................................................... 63 3.7.2 Special features (dune slacks) ................................................................................................... 64 Glenelg Estuary and Discovery Bay Ramsar Site 1 Ecological Character Description 3.7.3 Provides physical habitat for waterbirds .................................................................................. 65 3.7.4 Supports threatened species and communities ...................................................................... 66 3.7.5 Ecological connectivity ............................................................................................................... 68 4 Limits of Acceptable Change ....................................................................................................