Bioregional Assessment of Koala Populations in Nswdownload
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BIOREGIONAL ASSESSMENT OF KOALA POPULATIONS IN NSW A REPORT PREPARED FOR THE OFFICE OF ENVIRONMENT AND HERITAGE ENVIRONMENTAL SPATIAL AUGUST 2017 1 DOCUMENT CONTROL DRAFT 1 Prepared by: 06/03/2017 Brendan Rennison DRAFT 2 Prepared by: 24/08/2017 Brendan Rennison Reviewed by Mark Fisher 10/11/2017 FINAL FOR REVIEW Prepared by: 28/5/2018 Brendan Rennison Reviewed by Mark Fisher 10/6/2018 FINAL Brendan Rennison 14/6/2018 ACKNOWLEDGEMENTS A number of people have provided assistance and advice during the course of the project. NSW AGENCY STAFF John Turbill OEH Project Management Mark Fisher EPA Technical advice Bill Faulkner EPA Technical advice Martin Predavec OEH Technical advice David Scotts OEH Technical advice Jo Muldoon NPWS Technical advice George Barrott-Brown NPWS Technical advice Kylie Madden OEH Technical advice Jill Smith OEH Technical advice Chris Allen OEH Technical advice Rod Pietsch OEH Technical advice 2 CONTENTS DOCUMENT CONTROL ............................................................................................................................................ 2 Figures ................................................................................................................................................................ 4 Tables ................................................................................................................................................................. 4 Project Outline ........................................................................................................................................................ 6 Project Charter Objectives ................................................................................................................................. 6 Stage 1 Audit of Statewide Spatial Datasets ............................................................................................. 6 Stage 1 Assessment of the current Reservation Systems and Protection of Koalas within the Bioregional Areas of NSW .............................................................................................................................. 6 Stage 1 Development and implementation of trial prioritisation analysis of occupied koala habitat for acquisition in A pilot area .............................................................................................................................. 6 Bio-Regional Assessment ........................................................................................................................................ 8 Criteria for Assessment ...................................................................................................................................... 8 Adequacy of Reserve Estate ............................................................................................................................. 10 Other conservation categorys ...................................................................................................................... 10 Relevance and Application of Reserve Comprehensiveness data for Koala Reserve Planning.................... 11 Representation of koalas within Reserve Estate .............................................................................................. 14 Relevance and Application of Koala Representation data for Koala Reserve Planning ............................... 16 Population Status ............................................................................................................................................. 17 Population estimates and trends across bioregions in NSW ....................................................................... 18 Threatening processes ..................................................................................................................................... 23 Resilience Mapping .......................................................................................................................................... 27 3C Modelling for Biodiversity under Future Climate ................................................................................... 27 Overall priority for conservation and reservation ............................................................................................ 30 Interpretation of Overall Bioregional Priority for Reservation of Koala Lands ............................................ 32 South East Highlands Bioregion Prioritisation of Occupied Koala Habitat ........................................................ 33 Objective and Summary of Methodology ........................................................................................................ 33 The Areas of Interest.................................................................................................................................... 33 References ............................................................................................................................................................ 41 3 FIGURES Figure 1 Koala Prioritisation Project Process diagram ....................................................................................... 7 Figure 2 Bio-regional assessment....................................................................................................................... 9 Figure 3 Biodiversity climate adaptation: Manage Benefits 1990 versus 2050 (Drielsma et al. 2015) ............. 28 Figure 4 Bio-Climatic Difference 1990 to 2050 (Drielsma et al. 2015) ............................................................. 29 Figure 5 Areas of Interest for South East Highlands Bioregion ......................................................................... 34 Figure 6 Numeralla Area of Interest ................................................................................................................. 36 Figure 7 Mount Clifford Area of Interest .......................................................................................................... 37 Figure 8 Mount Dowling Area of Interest ......................................................................................................... 38 Figure 9 Queen Charlotte Area of Interest ....................................................................................................... 39 Figure 10 Bungonia Area of Interest .............................................................................................................. 40 TABLES Table 1 Tenure categories for reserve estate adequacy analysis .................................................................... 10 Table 3 Representation of koalas within reserve estate across bio-regions in NSW ....................................... 15 Table 4 Koala populations across NSW IBRA regions ...................................................................................... 19 Table 5 Trend in recorded occurrence of koalas across generation (6 year period) as a proportion of overall survey effort. ........................................................................................................................................................ 20 Table 6 Classes of past and future threat impact mapping ............................................................................. 23 Table 7 Threat mapping by bio-region and threat category across NSW (Adams-Hosking et al. 2016). ........ 24 Table 8 Criteria for bioregional prioritisation of koala conservation and reservation .................................... 30 Table 9 Overall bio-regional priority for conservation investment and reservation for NSW ........................ 31 Table 10 Key criteria for South East Highlands Very High Reservation Priority ............................................ 32 Table 11 Key criteria for Nandewar and Brigalow Belt South High Reservation Priority .............................. 32 Table 12 Five Areas of Interest for Koala Conservation in South East Highlands Bioregion ......................... 33 DISCLAIMER This report was prepared by Environmental Spatial in good faith exercising all due care and attention, but no representation or warranty, express or implied, is made as to the relevance, accuracy, completeness or fitness for purpose of this document in respect of any particular user’s circumstances. Users of this document should satisfy themselves concerning its application to, and where necessary seek expert advice in respect of, their situation. The views expressed within are not necessarily the views of the Department of Planning, Industry and Environment and may not represent Department policy. © Copyright State of NSW and the Department of Planning, Industry and Environment 4 5 PROJECT OUTLINE PROJECT CHARTER OBJECTIVES This project has been funded under the Saving our Species Iconic Koala project to provide support and strategic direction to future priorities in conservation actions for the koala. The project is one of a number of projects designed to data driven (evidence based) decision making for koala conservation in NSW. In 2016, the NSW Government announced an initiative to assist in the long to protection of priority koala habitat. It has allocated $10 million over 5 years to purchase and conserve land (in the National Parks reserve system) which protects priority koala habitat (OEH 2017). These purchases are to be made in line with NPWS acquisition criteria with a focus on koala habitat and occupancy. It is intended that this project help guide, at a bioregional and sub-regional level, further investigation of properties