Dargues Reef Gold Project
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BIG ISLAND MINING PTY LTD ABN 12 112 787 470 Dargues Reef Gold Project ECOLOGY Assessment Prepared by Gaia Research Pty Ltd SEPTEMBER 2010 Specialist Consultant Studies Compendium Volume 1, Part 2 BIG ISLAND MINING PTY LTD ABN 12 112 787 470 ECOLOGY Assessment Prepared for: R.W. Corkery & Co. Pty Limited Suite 15, 256 Anson Street ORANGE NSW 2800 Tel: (02) 6362 5411 Fax: (02) 6361 3622 Email: [email protected] On behalf of: Big Island Mining Pty Ltd Ground Floor 22 Oxford Close WEST LEEDERVILLE WA 6007 Tel: (08) 6380 1093 Fax: (08) 6380 1387 Email: [email protected] Prepared by: Gaia Research Pty Ltd PO Box 3109 NORTH NOWRA PO NSW 2541 Tel: (02) 4446 0384 Fax: (02) 4446 0384 Email: [email protected] September 2010 Gaia Research Pty Ltd BIG ISLAND MINING PTY LTD 2 - 2 SPECIALIST CONSULTANT STUDIES Dargues Reef Gold Project Part 2: Ecology Assessment Report No. 752/05 COPYRIGHT © Gaia Research Pty Ltd, 2010 and © Big Island Mining Pty Ltd, 2010 All intellectual property and copyright reserved. Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act, 1968, no part of this report may be reproduced, transmitted, stored in a retrieval system or adapted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without written permission. Enquiries should be addressed to Gaia Research Pty Ltd. Gaia Research Pty Ltd SPECIALIST CONSULTANT STUDIES 2 - 3 BIG ISLAND MINING PTY LTD Part 2: Ecology Assessment Dargues Reef Gold Project Report No. 752/05 CONTENTS Page EXECUTIVE SUMMARY ......................................................................................................................................... 2-7 DEFINITION OF TERMS ......................................................................................................................................... 2-8 1. INTRODUCTION......................................................................................................................................... 2-11 1.1 BACKGROUND .......................................................................................................................................... 2-11 1.2 PROJECT OVERVIEW AND PROPOSED SITE LAYOUT ......................................................................... 2-11 1.3 STUDY OBJECTIVES ................................................................................................................................. 2-15 1.4 DESCRIPTION OF SUBJECT SITE ........................................................................................................... 2-16 1.4.1 Introduction ...................................................................................................................................... 2-16 1.4.2 Geology ........................................................................................................................................... 2-16 1.4.2.1 Climate ............................................................................................................................. 2-16 2. LISTED FAUNA, FLORA AND ECOLOGICAL COMMUNITIES................................................................ 2-18 3. SURVEY METHODS .................................................................................................................................. 2-20 3.1 INTRODUCTION......................................................................................................................................... 2-20 3.2 FLORA SURVEYS ...................................................................................................................................... 2-20 3.2.1 Introduction ...................................................................................................................................... 2-20 3.2.2 Methods ........................................................................................................................................... 2-21 3.2.3 Grassland Classification .................................................................................................................. 2-21 3.3 FAUNA ASSESSMENT .............................................................................................................................. 2-23 3.3.1 Introduction ...................................................................................................................................... 2-23 3.3.2 Elliott and Cage Trapping ................................................................................................................ 2-24 3.3.3 Harp Trapping .................................................................................................................................. 2-26 3.3.4 Diurnal Bird Census ......................................................................................................................... 2-29 3.3.5 Foot-based Spotlighting ................................................................................................................... 2-29 3.3.6 Nocturnal Call Playback ................................................................................................................... 2-29 3.3.7 Diurnal Herpetofauna Census .......................................................................................................... 2-30 3.3.8 Nocturnal Streamside Search .......................................................................................................... 2-30 3.3.9 Targeted Surveys ............................................................................................................................ 2-30 3.4 ADEQUACY OF THE SURVEY METHODOLOGY ..................................................................................... 2-31 3.4.1 Incidental Observations ................................................................................................................... 2-38 4. RESULTS ................................................................................................................................................... 2-38 4.1 INTRODUCTION......................................................................................................................................... 2-38 4.2 PREVIOUS ASSESSMENTS CONDUCTED ON THE SITE ...................................................................... 2-38 4.3 ECOLOGICAL SETTING AND HABITAT IDENTIFIED ............................................................................... 2-39 4.4 FLORA SURVEY RESULTS ....................................................................................................................... 2-40 4.4.1 Introduction ...................................................................................................................................... 2-40 4.4.2 Summary of Flora Survey Results ................................................................................................... 2-40 4.4.3 Species Identified ............................................................................................................................ 2-41 4.4.4 Ecological and Vegetation Communities Identified .......................................................................... 2-41 4.4.5 Threatened Flora Species/Communities Identified .......................................................................... 2-51 4.4.5.1 Ecological Communities ................................................................................................... 2-51 Gaia Research Pty Ltd BIG ISLAND MINING PTY LTD 2 - 4 SPECIALIST CONSULTANT STUDIES Dargues Reef Gold Project Part 2: Ecology Assessment Report No. 752/05 CONTENTS Page 4.5 FAUNA SURVEY RESULTS ....................................................................................................................... 2-51 4.5.1 Introduction ...................................................................................................................................... 2-51 4.5.2 Elliott and Cage Trapping ................................................................................................................ 2-52 4.5.3 Harp Trapping .................................................................................................................................. 2-52 4.5.4 Diurnal Bird Census ......................................................................................................................... 2-53 4.5.5 Foot-Based Spotlighting .................................................................................................................. 2-54 4.5.6 Nocturnal Call Playback ................................................................................................................... 2-55 4.5.7 Diurnal Herpetofauna Census.......................................................................................................... 2-55 4.5.8 Nocturnal Streamside Search .......................................................................................................... 2-55 4.5.9 Amphibian surveys .......................................................................................................................... 2-56 4.5.10 Targeted Surveys ............................................................................................................................ 2-56 4.5.11 Incidental Observations ................................................................................................................... 2-56 4.5.12 Listed Fauna Species