Appendix a Flora and Vegetation Survey By
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Wonnerup North Mineral Sands Project (EPBC 2014/7205) – Preliminary Documentation APPENDIX A FLORA AND VEGETATION SURVEY BY ASTRON ENVIRONMENTAL SERVICES 00645801.DOCX Wonnerup North Mineral Sands Project Flora and Vegetation Assessment October 2013 Prepared for Cristal Mining Australia Limited © Copyright 2014 Astron Environmental Services Pty Ltd. All rights reserved. This document and information contained in it has been prepared by Astron Environmental Services under the terms and conditions of its contract with its client. The report is for the clients use only and may not be used, exploited, copied, duplicated or reproduced in any form or medium whatsoever without the prior written permission of Astron Environmental Services or its client. Wonnerup North Mineral Sands Project Flora and Vegetation Assessment Prepared for Cristal Mining Australia Limited Job Number: 21097-13 Reference: 21097-13_BSR_1Rev0_140407 Revision Status Rev Date Description Author(s) Reviewer A 07/11/2013 Draft Issued for Client Review V. Clarke R. Orifici B 11/12/2013 Draft Issued for Client Review V. Clarke S. Pearse C 04/04/2014 Draft Issued for Client Review V. Clarke S. Pearse 0 07/04/2014 Final V. Clarke S. Pearse Approval Rev Date Issued to Authorised by Name Signature A 07/11/2013 Resource Strategies Pty Ltd S. Pearse B 11/12/2013 Resource Strategies Pty Ltd S. Pearse C 04/04/2014 Resource Strategies Pty Ltd S. Pearse 0 07/04/2014 Resource Strategies Pty Ltd S. Pearse © Copyright 2014 Astron Environmental Services Pty Ltd. All rights reserved. This document and information contained in it has been prepared by Astron Environmental Services under the terms and conditions of its contract with its client. The report is for the clients use only and may not be used, exploited, copied, duplicated or reproduced in any form or medium whatsoever without the prior written permission of Astron Environmental Services or its client. Cristal Mining Australia Limited Wonnerup North Mineral Sands Project – Flora and Vegetation Assessment, October 2013 Abbreviations Abbreviation Definition Astron Astron Environmental Services BAM Act Biosecurity and Agriculture Management Act 2007 (State) BOM Bureau of Meteorology Cristal Mining Cristal Mining Australia Limited DEC Department of Environment and Conservation (now DPaW) DPaW Department of Parks and Wildlife DSEWPaC Department of Sustainability, Environment, Water, Population and Communities EPA Environmental Protection Authority (State) EPBC Act Environment Protection and Biodiversity Conservation Act 1999 (Commonwealth) ESA Environmentally Sensitive Area GDE Groundwater Dependent Ecosystem GPS Geographical positioning system IBRA Interim Biogeographic Regionalisation for Australia km Kilometres m Metres Matters of national environmental significance (as listed under the Commonwealth MNES Environment Protection and Biodiversity Conservation Act 1999) NVIS National Vegetation Information System The project Wonnerup North Mineral Sands Project RFA Regional Forest Agreement SCP Swan Coastal Plain The area defined within the boundary provided by Cristal Mining and illustrated in The survey area Figure 1. Page | ii Cristal Mining Australia Limited Wonnerup North Mineral Sands Project – Flora and Vegetation Assessment, October 2013 Executive Summary Cristal Mining Australia Limited (Cristal Mining) proposes to develop a mineral sands mining operation approximately 44 km south of Bunbury, Western Australia; herein referred to as the Wonnerup North Mineral Sands Project (the Project). Astron Environmental Services was commissioned by Cristal Mining to undertake a two-season flora and vegetation assessment for the Project. An initial desktop assessment revealed that 25 plant taxa declared as rare flora under the State Wildlife Conservation Act 1950 (and all listed under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act)) are located within a 10 km radius of the survey area. In addition, two priority one taxa, five priority two, 10 priority three and 11 priority four taxa are also found within the same radius. It should be noted however, that many of these conservation listed taxa are restricted to particular habitats not found within the survey area (i.e. Whicher Scarp and Busselton ironstone) and not likely to occur within the survey area. The initial field survey was undertaken over two days in June; being the first phase of a level two survey with a follow-up field survey undertaken from 3 to 6 October 2013. A combined total of 201 plant taxa from 49 plant families and 130 genera were recorded during the survey, from the remnant vegetation within farm paddocks, degraded farm remnants and from roadside remnant vegetation, which varied in condition. One specimen collected from Wonnerup South Road from a small population directly adjacent to Abba River is the declared rare flora species: Chamelaucium sp. C Coastal Plain (R.D. Royce 4872). The species occurs on both sides on Wonnerup South Road and the WA Department of Parks and Wildlife has been advised of its location. This taxon is listed as vulnerable under the Commonwealth EPBC Act. Another species of threatened flora, Verticordia densiflora var. pedunculata was thought to have potential to occur on the north side of Ruabon Road adjacent to quadrat 17. However, three further visits to this vicinity over its peak flowering period (December-January), found only the priority three taxon, Verticordia attenuata. Four species of priority flora were recorded during the spring survey, all within the north of the survey area. The desktop assessment found previously recorded locations of priority flora on the private properties in the survey area. However, the location descriptions of the previous records do not match the coordinate locations and these taxa have not been located during either of the 2013 surveys; their collection information do not suggest they were ever found within the survey area. Of the 38 weed species recorded; four are listed as declared pests under the WA Biosecurity and Agriculture Management Act 2007 and are bridal creeper (*Asparagus asparagoides), narrowleaf cotton bush (*Gomphocarpus fruticosus), apple of Sodom (*Solanum linnaeanum), and arum lily (*Zantedeschia aethiopica). Five vegetation complexes have been previously mapped across the survey area (Mattiske and Havel 1998) and each of these units is described with the more recent assessment of reservation and pre- European status (Havel and Mattiske 2002): • Abba complexes AB, AF, Ad, Aw all with 0% in reservation and with 2%; 0% (8 hectares only of 1901 hectares); 14%; and 2% pre-European area remaining respectively. • The Ludlow complex Lw also has 0% in reservation and 0% of its pre-European area remaining. Page | iii Cristal Mining Australia Limited Wonnerup North Mineral Sands Project – Flora and Vegetation Assessment, October 2013 To be consistent with the vegetation complex mapping (Mattiske and Havel 1998) that covers the survey area; the vegetation within the survey area was ascribed to one of the pre-defined complexes already mapped. However, the previous vegetation complex mapping was undertaken at a broader scale (1: 50,000) than the Astron survey (1: 5,000) so the boundaries of the broader mapping were refined following ground-truthing. Most of the remnant vegetation found within the farmland of the survey area was found to be in a completely degraded condition, with the majority parkland cleared or consisting of individual paddock trees. Some very small areas of remnant vegetation which retained some understorey occurred on the farmland adjacent to Ruabon Road in the north of the study area. The only intact remnant vegetation within the survey area was found in the road reserves along both sides of Wonnerup South and Ruabon Roads. Wonnerup South Road east side is a fine mosaic of condition ranging from good to degraded condition; to completely degraded condition. The west side of the road ranged from degraded condition to completely degraded (with some areas completely cleared of remnant vegetation). The road reserve along Ruabon Road retained reasonable stands of intact vegetation that was in ‘excellent’ condition. In addition, two wetland areas exist near the Bussell Highway intersection, which remain in relatively ‘good’ to ‘very good’ condition despite historical disturbance. The remnant vegetation along Ruabon Road is significant in that it contains intact Abba vegetation complexes that have critically low representation remaining (i.e. less than 30% extent of original extent; or 10% within constrained areas); it contains a suite of priority flora (Isopogon formosus subsp. dasylepis P3, Jacksonia gracillima P3, Verticordia attenuata P3, and a Lepyrodia species of unknown conservation significance (Lepyrodia aff. riparia). In addition, it provides a corridor or linkage from the Wonnerup Ramsar wetlands and tuart conservation areas towards the Whicher Scarp and therefore provides a catena of vegetation types representative of the Busselton Plain; an example of which is not found elsewhere. Section 5 and 6 of this report contains information relevant to the minimisation, mitigation and management of potential impacts of the vegetation clearing associated with the project. Essentially, approximately 90% of the project area is cleared farmland containing some small isolated stands of highly degraded remnant vegetation. The only areas of intact vegetation are along Wonnerup South Road (not impacted by the project) and Ruabon Road where