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Spring Rare Flora Search Lots 81, 99, 52, 51 and 50 North Side of Toodyay Road Between Reen and Reserve Roads Gidgegannup City

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Spring Rare Flora Search Lots 81, 99, 52, 51 and 50 North Side of Toodyay Road Between Reen and Reserve Roads Gidgegannup City SPRING RARE FLORA SEARCH LOTS 81, 99, 52, 51 AND 50 NORTH SIDE OF TOODYAY ROAD BETWEEN REEN AND RESERVE ROADS GIDGEGANNUP CITY OF SWAN Prepared by Arthur S Weston, PhD, Consulting Botanist ABN: 54 924 460 919 8 Pitt Street ST JAMES WA 6102 Tel/Fax (08) 9458 9738 [email protected] Prepared for Brian Hunt Brian Hunt Pty Ltd PO Box 443 BAYSWATER WA 6933 (Bayswater House, 26 Bassendean Road, Bayswater, 6053) Ph. (08) 6267 2400, 0418 912 217 Email: [email protected] 3 February 2010 SUMMARY This report describes methods and presents results of spring searches for rare flora in Lots 81, 99, 52, 51 and 50, on the north side of Toodyay Road between the southern part of Reen Road (Wilson Street) and Reserve Road, Gidgegannup. The principal objectives of this project were to search for Threatened (EPBC-listed), Declared Rare and Priority Flora. Fieldwork for the project was done by botanist Dr Arthur Weston and an assistant in November 2009. No Threatened, Declared Rare Flora or Priority Flora was found during the fieldwork. i TABLE OF CONTENTS Page SUMMARY i 1.0 INTRODUCTION 1 1.1 LOCATION 1 1.2 OBJECTIVES 1 1.3 REGIONAL SETTING 2 1.3.1 Climate 2 1.3.2 Landforms and Soils 2 1.3.3 Vegetation 2 1.3.4 Flora 3 2.0 METHODS 3 2.1 PREPARATION FOR FIELD WORK 3 2.2 FIELD WORK 4 2.3 AFTER FIELD WORK 4 3.0 RESULTS AND DISCUSSION 4 3.1 VEGETATION AND HABITATS 4 3.2 FLORA 5 3.3 LIMITATIONS 5 4.0 ACKNOWLEDGEMENTS 5 5.0 REFERENCES 6 FIGURES 1 Map of Gidgegannup rare flora search area 2a, 2b Aerial views of Gidgegannup rare flora search area APPENDICES A Threatened, Declared Rare and Priority Flora Recorded in the Gidgegannup Area B Gidgegannup Area T and DRF Taxa (based upon DEWHA EPBC Act Protected Matters Report: Database Search Area: Coordinates: -31.7,116.1, -31.7,116.3333, -31.91666,116.3333, -31.91666,116.1) ii iii SPRING RARE FLORA SEARCH LOTS 81, 99, 52, 51 AND 50 on NORTH SIDE OF TOODYAY ROAD BETWEEN REEN AND RESERVE ROADS GIDGEGANNUP, CITY OF SWAN 1.0 INTRODUCTION This report describes methods and presents results of spring searches for rare flora in the Lots 81, 99, 52, 51 and 50 that are on the north side of Toodyay Road between Reen and Reserve Roads, Gidgegannup. The principal objective of this project was to search for Threatened (EPBC-listed), Declared Rare and Priority Flora. These lots are referred to in this report as ‘the search area’. 1.1 LOCATION The Gidgegannup search area is approximately 35 km north-east of Perth. It is in the area on the north side of Toodyay Road between the northern ends of Stoneville and Bunning Roads. It borders The Springs Road, Toodyay Road, Reen Road (the southern 1.5 km of which is shown on some maps as Wilson Street) and Reserve Road. It is approximately 1.8 km wide, between 1 km and 0.5 km deep and 186 ha in area. The street addresses of the lots are 102 Reen Rd. (Lot 81), 39 The Springs Rd. (Lot 99), 1949 Toodyay Rd. (Lot 52), 1951 Toodyay Rd. (Lot 51) and 43 Reserve Rd. (Lot 50). Landgate (2009) uses these street numbers, rather than lot numbers, on its Property Finder Hybrid imagery. 1.2 OBJECTIVES The aim of the search was to find any plants of Declared Rare and Priority Flora that might be in the search area and to record locations of any found. In particular, we looked for the DRF Thelymitra dedmaniarum (Cinnamon Sun Orchid) and other flora listed in Appendix A of this report. These are the Declared Rare Flora (R, DRF) and Priority Flora (P) listed in results of Department of Environment and Conservation (DEC) searches of relevant DEC flora databases and in results of searches of relevant EPBC Act Protected Matters databases with the DEWHA EPBC Act Protected Matters Search Tool. The EPA’s Guidance No. 51 (Environmental Protection Authority 2004) advises that the most appropriate time for a primary flora survey is when the majority of the plant species, especially ephemerals and geophytes, in an area are flowering, fruiting and have foliage that allows identification. For a Level 2 search for rare flora the Guidance specifies ‘one or more visit/s in the main flowering season’, which is usually, but not always, spring. The October- November period would probably be the best time for the Gidgegannup search area because the two Declared Rare orchids to be searched for there are most likely to be in flower, and identifiable, then. 1 1.3 REGIONAL SETTING Beard shows the Gidgegannup area as being in the north-western part of the Dale [phytogeographic] Subdistrict (Beard 1980), and, in Beard (1990, 1981, 1980, 1979a), he briefly describes the subdistrict’s climate, geology, landforms, soils, vegetation and flora. There are vegetation maps in [or accompanying] Beard (1981, 1979a) at scales of 1:1 000 000 and 1:250 000, respectively. 1.3.1 Climate With winter rainfall and a bioclimatic dry season, when precipitation is less than the amount required to maintain plant growth, calculated to be five to six months long, the Gidgegannup climate can be classified as Dry Mediterranean or warm mediterranean. It is shown as the former in Beard (1990, Fig. 2.8; 1981, Figs. 8, 9) and described as the latter in Beard (1980, p. 54). The nearest Bureau of Meteorology stations in the Dale Subdistrict are Kalamunda (closed in 1994) and Bickley, where the mean annual rainfalls are 1065 mm (Kalamunda 1908-1993) and 1109 mm (Bickley 1969-2009). The mean annual rainfall in Gidgegannup is probably less than 1000 mm because, as shown by rainfall maps in Beard (1979a and b, Figs. 1), mean annual rainfall on the Darling Plateau decreases northwards from Bickley. 1.3.2 Landforms and Soils The 1:250 000 scale Landforms and Soils Perth sheet by Churchward and McArthur (1980) shows the search area as having two Darling Plateau units: the Lateritic Uplands Dwellingup (D) unit and the Minor Valleys Yarragil (Yg) unit. The Yg unit is in the northern part of Lot 50 and near the southern edges of the other lots in the search area. The D unit is in the rest of the search area. All of the Darling Plateau uplands on the Perth sheet south of Avon River and to as far east as Wooroloo are mapped as D and Yg units, and the slopes and floors of most Darling Plateau major valleys in that area are mapped as the Murray (My) unit. 1.3.3 Vegetation Beard (1981, 1979a) shows, at scales of 1:1 000 000 and 1:250 000, the vegetation of the Gidgegannup area and beyond it to be Jarrah-marri (Eucalyptus marginata – Corymbia 2 (Eucalyptus) calophylla) forest (e 3Mc) in the western sector of the Dale Subdistrict. There is Blackbutt (Eucalyptus patens) in valleys, while Bullich (Eucalyptus megacarpa) and Taxandria (Agonis) linearifolia are in swampy bottomlands. The 1:250 000 scale Vegetation Perth sheet by Heddle et al. (1980) shows the search area as having two Darling Plateau vegetation complexes: the Dwellingup Complex in Medium to High Rainfall (Mapping Unit 2) and the Yarragil Complex (Minimum Development Swamps) in Medium to High Rainfall (Mapping Unit 10). Vegetation Complex 10 is in the northern part of Lot 50 and near the southern edges of the other lots in the search area. Vegetation Complex 2 is in the rest of the search area. 2 Spring Rare Flora Searches, Lots 81, 99, 52, 51, 50 Toodyay Rd, Gidgegannup ASW 3/02/10 The vegetation of Vegetation Complex 2 and the upper slopes of Vegetation Complex 10 is characteristically Eucalyptus marginata – Corymbia calophylla Open Forest, with Eucalyptus patens and E. megacarpa on the valley floors of Vegetation Complex 10. All of the Darling Plateau uplands on the Perth sheet south of Avon River and to as far east as Wooroloo are mapped as Vegetation Complexes 2 and 10, and the slopes and floors of most Darling Plateau major valleys in that area are mapped as the Murray and Bindoon Complex in Low to Medium Rainfall (Mapping Unit 21). 1.3.4 Flora Beard (1979a, 1981, 1990) lists some characteristic flora of the Darling System and Heddle et al. (1980, Tables 3.2 and 3.4) lists the species that define Northern Jarrah Forest site- vegetation types (Table 3.2) and which vegetation complexes these site-vegetation types are in (Table 3.4). The Heddle et al. Table 3.2 is from Havel (1975), the same source and essentially the same table as Table II in Beard (1979a). The species, and other taxa, listed in the first two columns of Table A1, in Appendix A, are Declared Rare and Priority Flora that have been recorded in Gidgegannup and nearby. 2.0 METHODS 2.1 PREPARATION FOR FIELD WORK Prior to beginning searches in the field, two sets of databases were searched for Priority, Declared Rare and Threatened Flora recorded within Gidgegannup and nearby. Department of Environment and Conservation (DEC) staff were requested to search three DEC flora databases for Priority and Declared Rare Flora, and the Department of the Environment, Water, Heritage and the Arts (DEWHA) EPBC Act Protected Matters Search Tool was used to generate a report listing Threatened (EPBC-listed) Flora. The names of the databases searched, the parameters used for the searches and the results of the searches are given in Appendix A.
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