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Northam Pithara Biological Assessment AECOM.PDF Northam - Pithara Road Main Roads Western Australia 28 August 2012 Document No. 60248902- 201.01_ENV_REP_0001 Northam - Pithara Road Biological Assessment Ballidu to Pithara AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment Northam - Pithara Road Biological Assessment Ballidu to Pithara Prepared for Main Roads Western Australia Prepared by AECOM Australia Pty Ltd 3 Forrest Place, Perth WA 6000, GPO Box B59, Perth WA 6849, Australia T +61 8 6208 0000 F +61 8 6208 0999 www.aecom.com ABN 20 093 846 925 28 August 2012 60248902 AECOM in Australia and New Zealand is certified to the latest version of ISO9001 and ISO14001. © AECOM Australia Pty Ltd (AECOM). All rights reserved. AECOM has prepared this document for the sole use of the Client and for a specific purpose, each as expressly stated in the document. No other party should rely on this document without the prior written consent of AECOM. AECOM undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document. This document has been prepared based on the Client’s description of its requirements and AECOM’s experience, having regard to assumptions that AECOM can reasonably be expected to make in accordance with sound professional principles. AECOM may also have relied upon information provided by the Client and other third parties to prepare this document, some of which may not have been verified. Subject to the above conditions, this document may be transmitted, reproduced or disseminated only in its entirety. G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment This page has been left blank intentionally. G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment Table of Contents Executive Summary i 1.0 Introduction 1 1.1 Background 1 1.2 Location 1 1.3 Objectives 1 1.4 Physical Environment 3 1.4.1 Climate 3 1.4.2 Soils and Geology 3 2.0 Biological context 5 2.1 IBRA Regions 5 2.2 Flora and Vegetation 5 3.0 Legislative framework 7 3.1 Threatened and Priority Species 7 3.2 Threatened and Priority Ecological Communities 7 3.3 Communities of Local, Regional and National Significance 7 3.3.1 Significant Species 8 3.3.2 Vegetation Clearing, Extent and Status 8 3.4 Threatened, Priority and Migratory Fauna Species 9 4.0 Methodology 11 4.1 Level 2 Flora and Vegetation Assessment 11 4.1.1 Desktop Assessment 11 4.1.2 Field Assessment 11 4.1.3 Vegetation Condition 12 4.1.4 Rare Flora Markers and Targeted Searches 13 4.1.5 Introduced Species 13 4.1.6 Taxonomy and Nomenclature 13 4.2 Level 1 Fauna Survey 14 4.2.1 Desktop Assessment 14 4.2.2 Field Assessment 14 4.2.3 Taxonomy and nomenclature 14 5.0 Survey Limitations 15 6.0 Results 17 6.1 Flora 17 6.1.1 Desktop Assessment 17 6.1.2 Field Assessment 24 6.1.3 Threatened and Priority Flora 24 6.1.4 Introduced Species 25 6.2 Vegetation 26 6.2.1 Desktop Assessment 26 6.2.2 Field Assessment 27 6.3 Fauna 50 6.3.1 Desktop Assessment 50 6.3.2 Field Assessment 55 7.0 Discussion 65 7.1 Flora 65 7.1.1 Threatened, Priority and other Significant Flora 65 7.1.2 Introduced Species 68 7.2 Vegetation 68 7.2.1 Locally and Regionally Significant Vegetation 68 7.2.2 Threatened and Priority Ecological Communities 69 7.2.3 Vegetation Condition 69 7.3 Fauna 69 7.3.1 Significant Fauna Species 69 8.0 Assessment against the 10 Clearing Principles 73 Conclusions and Recommendations 77 G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment 9.0 References 79 Appendix A Definitions of Threatened and Priority Flora Species A Appendix B Categories of Threatened Flora Species B Appendix C Categories of Threatened and Priority Fauna Species C Appendix D Summary of Vascular Flora Species Recorded D Appendix E Summary of Vascular Flora Species Recorded at Each Community E Appendix F Qualitative Quadrat Data F Appendix G DAFWA Recommended Control Measures for Skeleton Weed (Chondrilla juncea) G Appendix H EPBC Act Protected Matters Report H Appendix I Nature Map Report I Appendix J Locations of Threatened and Priority Flora recorded within the Survey area J Appendix K Summary of Rare Flora Markers within the Survey area K List of Plates Plate 1 Grevillea dryandroides subsp. dryandroides 65 Plate 2 Dampiera ?glabrescens observed within the survey area, in a senescent state due to dry conditions 66 List of Tables Table 1 Beard’s (1981) Terrestrial Vegetation Types within the Survey areas 5 Table 2 Vegetation Structural Classes (Swan Coastal Plain etc) 12 Table 3 Bushland Condition Rating Scale 13 Table 4 Records of Threatened and Priority Flora from the vicinity of the survey area (Source: DEC, Florabase) 18 Table 5 Summary of Rare Flora Markers within the Survey area 24 Table 6 Introduced flora species known to have a high ecological impact identified by desktop assessment as potentially occurring in the survey area 25 Table 7 Introduced Flora Species Recorded from the Survey which are regarded as having a high ecological impact according to DEC (2009). 26 Table 8 Pre-European and Current Extent of Vegetation Associations that occur within the survey area (Beeston et al 2002). 26 Table 9 Vegetation Units of the Survey area 28 Table 10 Species richness of vegetation units recorded within the survey area 29 Table 11 Varying Vegetation Condition within the Survey area 30 Table 12 Conservation significance of vegetation units 47 Table 13 Records of Threatened and Priority Fauna from the vicinity of the survey area 51 Table 14 Fauna Species recorded within the survey area May 2012 55 Table 15 Fauna habitat areas of the survey area 56 G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment List of Figures Figure 1 Survey area 2 Figure 2 Climate Averages from Dalwallinu (BoM, 2012). 3 Figure 3 Geology of the Survey area (DMP, 2008) 4 Figure 4 Pre-European Vegetation (Beard, 1981) 6 Figure 5 Results of Desktop Assessment - Records of Threatened and Priority Flora in the vicinity of the Survey area 23 Figure 6 Vegetation Units of the Survey area 31 Figure 7 Vegetation Condition of the Survey area 39 Figure 8 Threatened and Priority Flora, TECs, PECs, Wetlands and Environmentally Sensitive Areas 49 Figure 9 Fauna Habitats of the Survey area 57 G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road Northam - Pithara Road Biological Assessment This page has been left blank intentionally. G:\60248902 - MRWA ENV ETS 09-10\201 Northam Pithara Road\8 Issued Docs\8.1 Reports\60248902 - 201.01 - REP f&F Rev0_20122808.docx Revision 0 - 28 August 2012 AECOM Northam - Pithara Road i Northam - Pithara Road Biological Assessment Executive Summary Main Roads Western Australia (MRWA) requires a biological survey for the Northam-Pithara Road from Ballidu to Pithara. The purpose of the biological assessment is to provide an appropriate examination and description of the local environment to ensure that all observable aspects of ecological significance are identified and recorded. The results of the biological assessment will assist MRWA in the preparation of an Environmental Impact Assessment (EIA) and Environmental Management Plan (EMP) or other documents as required. A field assessment of the flora, vegetation and fauna values of the area was carried out by AECOM Australia Pty Ltd (AECOM) during May 2012 with the following objectives: - conduct a ‘Level 2’ Flora and Vegetation assessment in accordance with methodologies stated in Environmental Protection Authority (EPA) Guidance Statement 51 - identify any potential floristic matters of conservation significance - determine the presence or absence of Threatened (T) or Priority Flora - map and delineate vegetation communities and vegetation condition - conduct a ‘Level 1’ Fauna assessment in accordance with methodologies stated in EPA Guidance Statement 56. - record observable evidence of fauna and fauna activity at the site - determine potential significant fauna habitats present at the site. - examine existing rare flora markers on site to determine the status of populations at these locations. A level 2 flora and vegetation assessment in accordance with EPA Guidance Statement 51 was carried out within the road reserve (up to the fence line or 100 metres (m) each side of the road if no fence present) between Pithara and just south of Ballidu on 22 to 24 May 2012. A targeted survey for Threatened and Priority flora species was carried out at the locations of previously known populations and rare flora markers. Flora and vegetation data was collected at 22 sites. The survey was conducted outside of what is considered the optimal time for survey in the Avon Wheatbelt region (following main rain in winter – EPA, 2004a) therefore the majority of annual and ephemeral taxa would not have been recorded, and some perennial taxa could not be identified to a high degree of certainty due to a lack of flowering and fruiting material.
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