Rainforest Dieback Mapping and Assessment
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RESEARCH REPORT Rainforest Dieback Mapping and Assessment 2004 Monitoring Report Including an Assessment of Dieback in High Altitude Rainforests Stuart J. Worboys Rainforest CRC Headquarters at James Cook University, Smithfield, Cairns Postal address: PO Box 6811, Cairns, QLD 4870, AUSTRALIA Phone: (07) 4042 1246 Fax: (07) 4042 1247 Email: [email protected] http://www.rainforest-crc.jcu.edu.au The Cooperative Research Centre for Tropical Rainforest Ecology and Management (Rainforest CRC) is a research partnership involving the Cooperative Research Centre for Tropical Rainforest Ecology and Management Commonwealth and Queensland State Governments, the Wet Tropics Management Authority, the tourism industry, Aboriginal groups, the CSIRO, James Cook University, Griffith University and The University of Queensland. RAINFOREST DIEBACK MAPPING AND ASSESSMENT 2004 MONITORING REPORT INCLUDING AN ASSESSMENT OF DIEBACK IN HIGH ALTITUDE RAINFORESTS Stuart J. Worboys School of Tropical Biology James Cook University, Cairns Established and supported under the Australian Cooperative Research Centres Program © Cooperative Research Centre for Tropical Rainforest Ecology and Management. ISBN 0 86443 758 7 This work is copyright. The Copyright Act 1968 permits fair dealing for study, research, news reporting, criticism or review. Selected passages, tables or diagrams may be reproduced for such purposes provided acknowledgment of the source is included. Major extracts of the entire document may not be reproduced by any process without written permission of the Chief Executive Officer, Cooperative Research Centre for Tropical Rainforest Ecology and Management. Published by the Cooperative Research Centre for Tropical Rainforest Ecology and Management. Further copies may be requested from the Cooperative Research Centre for Tropical Rainforest Ecology and Management, James Cook University, PO Box 6811 Cairns, QLD, Australia 4870. This publication should be cited as: Worboys, S. J. (2006) Rainforest Dieback Mapping and Assessment. 2004 Monitoring Report Including an Assessment of Dieback in High Altitude Rainforests. Cooperative Research Centre for Tropical Rainforest Ecology and Management. Rainforest CRC, Cairns. (54 pp.) Cover Images © (Top) Rainforest CRC. (Centre) Healthy rainforest canopy near Cape Tribulation, north Queensland. Image courtesy Shannon Hogan. (Bottom) Dieback near the northwest peak of Mount Bartle Frere, north Queensland, December 2002. January 2006 For copies of this report, visit: www.rainforest-crc.jcu.edu.au Rainforest Dieback Mapping and Assessment – 2004 Monitoring Report CONTENTS Tables.......................................................................................................................................iii Figures .................................................................................................................................... iv Acknowledgements .................................................................................................................. v Executive Summary ................................................................................................................ vi 1. Introduction .....................................................................................................................1 1.1 Background..............................................................................................................1 1.2 Monitoring Program Design .....................................................................................2 1.3 Terms of Reference .................................................................................................2 1.4 Outputs.....................................................................................................................3 2. Methods............................................................................................................................5 2.1 Site Selection...........................................................................................................5 2.1.1 Mount Bartle Frere........................................................................................5 2.1.2 Mount Bellenden Ker....................................................................................5 2.1.3 Other Areas..................................................................................................6 2.2 Tasks Undertaken at Study Sites.............................................................................7 2.3 Soil Baiting...............................................................................................................7 2.4 Site Descriptions......................................................................................................7 2.4.1 Forest Structure............................................................................................8 2.4.2 Site Health....................................................................................................8 2.4.3 Soil Profiles...................................................................................................9 2.4.4 Tree Health Assessments ............................................................................9 2.4.5 Tree Size Classes ........................................................................................9 2.5 Floristic and Canopy Composition – Mount Bartle Frere Sites ..............................10 2.5.1 Floristics.....................................................................................................10 2.5.2 Species Diversity........................................................................................10 2.5.3 Successional Status...................................................................................11 2.6 Analyses.................................................................................................................11 3. Results – Mountaintop Sites Only ...............................................................................13 3.1 Site Descriptions....................................................................................................13 3.1.1 Mount Bartle Frere Western Access Track.................................................13 3.1.2 Mount Bellenden Ker..................................................................................14 3.2 Tree Health Assessments......................................................................................20 3.2.1 Mount Bartle Frere......................................................................................20 3.3 Floristic and Canopy Composition .........................................................................22 3.3.1 Species Diversity........................................................................................22 i Stuart J. Worboys 3.3.2 Successional Status...................................................................................22 3.4 Feral Pigs in Mountaintop Environments ...............................................................23 4. Results – All Sites .........................................................................................................25 4.1 Soil Testing............................................................................................................25 4.2 Tree Health Assessments......................................................................................27 4.3 Floristic and Canopy Composition .........................................................................27 4.3.1 Stem Densities...........................................................................................27 4.3.2 Rare and Threatened Species....................................................................29 4.3.3 Threatened Ecosystems.............................................................................30 5. Discussions ...................................................................................................................31 5.1 Modifications to Monitoring Protocol ......................................................................31 5.2 Modifications to Zoning Criteria..............................................................................31 5.3 Impacts on Threatened Species and Communities ...............................................31 5.3.1 Threatened Ecological Communities..........................................................31 5.3.2 Threatened Species...................................................................................32 5.4 Distribution of Phytophthora cinnamomi ................................................................32 6. Conclusion.....................................................................................................................35 7. References .....................................................................................................................37 8. Contacts and Equipment Sources...............................................................................39 Appendix 1 – Species List ...................................................................................................40 ii Rainforest Dieback Mapping and Assessment – 2004 Monitoring Report TABLES Table 1: List of study sites and the research tasks carried out in 2002 and 2004 ...............6 Table 2: Physical description of monitoring sites on Mount Bartle Frere...........................13 Table 3: Regional Ecosystems containing dieback study sties on Mount Bartle Frere .....14 Table 4: Site health ratings for Mount