Coastal Seagrass Habitats at Risk from Human Activity in the Great Barrier Reef World Heritage Area Review of Areas to Be Targeted for Monitoring
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Coastal Seagrass Habitats at Risk from Human Activity in the Great Barrier Reef World Heritage Area Review of areas to be targeted for monitoring Michael Rasheed, Helen Taylor, Rob Coles and Len McKenzie Queensland Department of Primary Industries and Fisheries Northern Fisheries Centre, Cairns Supported by the Australian Government’s Marine and Tropical Sciences Research Facility Project 1.1.3 Condition, trend and risk in coastal habitats: Seagrass indicators, distribution and thresholds of potential concern © Queensland Department of Primary Industries and Fisheries. PR07-2971 This report should be cited as: Rasheed, M. A., Taylor, H. A., Coles, R. G. and McKenzie, L. J. (2007) Coastal seagrass habitats at risk from human activity in the Great Barrier Reef World Heritage Area: Review of areas to be targeted for monitoring. Report to the Marine and Tropical Sciences Research Facility. Reef and Rainforest Research Centre Limited, Cairns (122 pp.). Made available for download by the Reef and Rainforest Research Centre Limited for the Australian Government’s Marine and Tropical Sciences Research Facility. The Marine and Tropical Sciences Research Facility (MTSRF) is part of the Australian Government’s Commonwealth Environment Research Facilities programme. The MTSRF is represented in North Queensland by the Reef and Rainforest Research Centre Limited (RRRC). The aim of the MTSRF is to ensure the health of North Queensland’s public environmental assets – particularly the Great Barrier Reef and its catchments, tropical rainforests including the Wet Tropics World Heritage Area, and the Torres Strait – through the generation and transfer of world class research and knowledge sharing. This publication is copyright. The Copyright Act 1968 permits fair dealing for study, research, information or educational purposes subject to inclusion of a sufficient acknowledgement of the source. The views and opinions expressed in this publication are those of the authors and do not necessarily reflect those of the Australian Government or the Minister for the Environment and Water Resources. While reasonable effort has been made to ensure that the contents of this publication are factually correct, the Commonwealth does not accept responsibility for the accuracy or completeness of the contents, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the contents of this publication. The Queensland Department of Primary Industries and Fisheries has taken all reasonable steps to ensure the information contained in this publication is accurate at the time of reporting. Seagrass habitat distribution and abundance and risks to seagrass meadows can change seasonally and between years, and readers should ensure they make appropriate enquiries to determine whether new information is available. This report is available for download from the Reef and Rainforest Research Centre Limited website: http://www.rrrc.org.au/mtsrf/theme_1/project_1_1_3.html April 2008 Seagrass Habitats at Risk in the Great Barrier Reef World Heritage Area Contents List of Tables............................................................................................................................ ii List of Maps.............................................................................................................................. ii Acronyms Used In This Report ................................................................................................iii Acknowledgements ..................................................................................................................iii 1. Introduction .....................................................................................................................1 The MTSRF Seagrass Status and Trends Program .........................................................1 Assessing Seagrasses at Risk ..........................................................................................2 2. GBRWHA Seagrass Assessment...................................................................................2 Workshop Methodology.....................................................................................................2 Seagrass Assessment Matrix............................................................................................3 Selection of Priority Monitoring Areas ...............................................................................8 Very High Threat Level Areas ......................................................................................11 Gladstone (The Narrows to Rodds Bay) ..................................................................11 Cairns (Double Island to Cape Grafton) ...................................................................13 Townsville (Cape Pallarenda to Cleveland Bay) ......................................................15 Mourilyan Harbour....................................................................................................17 High Threat Level Regions ...........................................................................................18 Whitsunday Islands (including mainland coast) .......................................................18 Hinchinbrook (Family Islands to Lucinda) ................................................................19 Pioneer Bay..............................................................................................................21 Cape Flattery (Starke River to Cape Flattery) ..........................................................21 Cooktown (Indian Head to Archer Point)..................................................................22 Abbot Bay to Edgecombe Bay .................................................................................22 Moderate Level Threat Regions ...................................................................................23 Corbett Reef / Clack Reef ........................................................................................23 Bathurst Bay.............................................................................................................23 Barrow Point to Murdoch Point.................................................................................24 Upstart Bay...............................................................................................................25 Green Island.............................................................................................................25 Bowling Green Bay...................................................................................................26 Palm Island Group....................................................................................................26 Magnetic Island........................................................................................................27 Port Douglas (Daintree to Double Island).................................................................27 3. Conclusions...................................................................................................................28 4. References .....................................................................................................................30 Appendix 1: Workshop Agenda.............................................................................................32 Appendix 2: Workshop Working Paper .................................................................................33 Appendix 3: Workshop Minutes.............................................................................................35 Appendix 4: Workshop Presentations ...................................................................................44 Presentation by Rob Coles..............................................................................................44 Presentation by Michael Rasheed...................................................................................50 i Rasheed et al. List of Tables Table 1: Description of the matrix category scores for the extremes of the score range (1 and 10).................................................................................................................4 Table 2: Completed seagrass assessment matrix for seagrass regions within the GBRWHA.................................................................................................................5 Table 3: Identified high risk seagrass regions to target for priority monitoring in the GBRWHA.................................................................................................................9 Table 4: Categories of threats and threat level for identified high risk seagrass target regions in the GBRWHA ........................................................................................10 List of Maps Map 1: Coastal seagrass regions within the GBRWHA, and location of highly threatened regions ...................................................................................................7 Map 2: Gladstone (The Narrows to Rodds Bay) target area..............................................12 Map 3: Cairns (Double Island to Cape Grafton) target area ..............................................13 Map 4: Townsville (Cape Pallarenda to Cleveland Bay) and Magnetic Island target areas ......................................................................................................................16 Map 5: Mourilyan Harbour target area ...............................................................................17