Level 1 Flora & Vegetation Survey
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LEVEL 1 FLORA AND VEGETATION SURVEY Lots 6, 300 and 301 Boomerang Road, Oldbury rpsgroup.com.au LEVEL 1 FLORA AND VEGETATION SURVEY Lots 6, 300 and 301 Boomerang Road, Oldbury Prepared by: Prepared for: RPS ROCLA QUARRY PRODUCTS 38 Station Street, SUBIACO WA 6008 130 Fauntleroy Avenue PO Box 465, SUBIACO WA 6904 REDCLIFFE WA 6104 T: 618 9211 1111 F: 618 9211 1122 E: [email protected] W: rpsgroup.com.au Report No: L08189 Version/Date: Rev 1, February 2012 RPS Environment and Planning Pty Ltd (ABN 45 108 680 977) Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury Document Status Review Format RPS Release Issue Version Purpose of Document Orig Review Date Review Approval Date Draft A Draft for Client Review AngMer KelMcC 03.02.09 DC 04.02.09 Rev 0 Final for Issue AngMer JohHal 17.02.09 SN 18.02.09 K. Bennetts 18.02.09 Rev 1 Final for Issue JohHal 17.02.12 DC 24.02.12 J. Haleen 24.02.12 Disclaimer This document is and shall remain the property of RPS. The document may only be used for the purposes for which it was commissioned and in accordance with the Terms of Engagement for the commission. Unauthorised copying or use of this document in any form whatsoever is prohibited. L08189, Rev 1, February 2012 DOCUMENT STATUS / DISCLAIMER Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury SUMMARY The findings of the Level 1 Flora and Vegetation Survey conducted in October 2008 of Lots 6, 300 and 301 Boomerang Road, Oldbury, can be summarised as follows: . Botanists recorded 122 taxa from thirty-eight plant families across the site; eighteen of these taxa are exotic species that are naturalised weeds. No Declared Rare Flora (DRF) species, as listed under subsection (2) of Section 23F of the Western Australian Wildlife Conservation Act 1950 or Priority Flora species as listed by the Department of Environment and Conservation (Atkins, 2008) were located within the study area. No species governed by the Environment Protection and Biodiversity Conservation Act 1999 were located within the study area. No other flora species of other conservation significance as stated in Guidance Statement 51 (EPA, 2004) or as listed in Bush Forever (Western Australian Planning Commission, 2000) were recorded within the study area. Three vegetation units were mapped for the study area. The vegetation units of the study area are inferred to represent Floristic Community Type (FCT) 21a Central Banksia attenuata – Eucalyptus marginata woodlands. This community type is centred on, but not exclusive to the Bassendean Dunes system. This community type is considered to be Well Reserved and Low Risk (Gibson et al. 1994). The vegetation condition of the study area ranged from Very Good to Completely Degraded (Figure 3). The south-eastern portion of the survey area has been mapped by Heddle et al. (1980) as part of the Serpentine River Complex. This complex has less than 10% remaining in the Perth Metropolitan Region of the Swan Coastal Plain (SCP) (Table 3), which makes it regionally significant under the Bush Forever criteria (Section 1.3.6). However, the vegetation on site is not representative of the ‘typical’ Serpentine River Complex; instead it is more similar to the Bassendean Complex, or may be a ‘transition area’ between the two. Also, the vegetation within the mapped Serpentine River Complex that is of Good or better condition is small and surrounded by many disturbance factors that make it unlikely to be viable in the long-term. FCTs and therefore potential Threatened Ecological Communities (TECs) or other conservation significant plant communities can not be positively confirmed without conducting a statistical analysis of plot based data. L08189, Rev 1, February 2012 Page i Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury This page is intentionally blank. L08189, Rev 1, February 2012 Page ii Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury TABLE OF CONTENTS Page SUMMARY ............................................................................................................. i 1.0 BACKGROUND ....................................................................................... 1 1.1 Objectives ................................................................................................................... 1 1.2 Declared Rare Flora and Priority Flora ................................................................. 1 1.2.1 State Legislation .................................................................................................................................. 1 1.2.2 DRF and Priority Flora Database Search Results ....................................................................... 2 1.2.3 Federal Legislation .............................................................................................................................. 3 1.3 Vegetation ................................................................................................................... 4 1.3.1 Vegetation Complexes ...................................................................................................................... 4 1.3.2 Floristic Community Types .............................................................................................................. 6 1.3.3 Threatened Ecological Communities ............................................................................................. 7 1.3.4 Other Vegetation of Conservation Significance ...................................................................... 10 1.3.5 TEC and PEC Database Search .................................................................................................... 10 1.3.6 Regionally Significant Bushland ..................................................................................................... 11 1.3.7 Locally Significant Natural Areas ................................................................................................. 11 2.0 METHODS ..............................................................................................13 2.1 Data Management and Interpretation ................................................................. 14 3.0 RESULTS AND DISCUSSION ...............................................................15 3.1 Flora ........................................................................................................................... 15 3.1.1 Introduced Flora (Weeds)............................................................................................................. 15 3.1.2 Declared Weeds .............................................................................................................................. 16 3.2 Vegetation ................................................................................................................. 18 3.2.1 Vegetation Units .............................................................................................................................. 18 3.2.2 Floristic Community Type (FCT) ................................................................................................ 18 3.3 Vegetation Condition .............................................................................................. 18 3.4 Regionally Significant Bushland ............................................................................. 19 3.5 Locally Significant Natural Areas .......................................................................... 20 3.5.1 Representation ................................................................................................................................. 20 3.5.2 Diversity ............................................................................................................................................. 21 3.5.3 Rarity................................................................................................................................................... 22 L08189, Rev 1, February 2012 Page iii Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury 3.5.4 Maintaining Ecological Processes or Natural Systems – Connectivity ............................... 22 3.5.5 Protection of Wetland, Streamline and Estuarine Fringing Vegetation and Coastal Vegetation .......................................................................................................................................... 23 4.0 RECOMMENDATIONS ..........................................................................25 5.0 LIMITATIONS ........................................................................................27 6.0 REFERENCES ..........................................................................................29 L08189, Rev 1, February 2012 Page iv Level 1 Flora and Vegetation Survey Lots 6, 300 and 301 Boomerang Road, Oldbury TABLES (contained within report text) Page Table 1: DRF and Priority Flora within a 5 km Radius of Lots 6, 300 and 301 Boomerang Road, Oldbury ............................................................................................... 3 Table 2: Representation of Lots 6, 300 and 301 Boomerang Road, Oldbury, remnant vegetation – Bassendean Complex – Central and South and Serpentine River Complex circa 1997 Remnant Vegetation Extent in the Swan Coastal Plain (Del Marco et al. 2004) ................................................................. 5 Table 3: Representation of Lots 6, 300 and 301 Boomerang Road, Oldbury, remnant vegetation – Bassendean