Roads Western Australia Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations
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Main Roads Western Australia Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations February 2011 Contents Executive Summary 1 1. Introduction 3 1.1 Background and Purpose 3 1.2 Scope of Works 3 2. Methodology 5 2.1 Desktop and Literature Review 5 2.2 Vegetation and Flora 5 2.3 Fauna 7 2.4 Likelihood of Occurrence Assessment 7 2.5 Survey Limitations 7 2.6 Nomenclature 8 3. Environmental Context 10 3.1 Climate 10 3.2 Topography and Geology 11 3.3 Hydrogeology and Hydrology 11 3.4 Bioregions and Subregions 11 3.5 Vegetation Communities 12 3.6 Flora 13 3.7 Fauna 14 4. Stage 1 Flora and Fauna Results 16 4.1 Survey Overview 16 4.2 Collets Road Section 1 (Western Park Entry) 16 4.3 Point Ann Road Section 2 (Point Ann Access Road) 23 4.4 Devils Creek / Collets Road Intersection 30 4.5 Point Ann Rd Intersection 36 4.6 MRWA Gravel Pit 1 36 4.7 MRWA Gravel Pit 3 44 4.8 Jerramungup Shire Pit 1a 51 4.9 Jerramungup Shire Pit 3b 58 4.10 Jerramungup Shire Pit 4 64 4.11 Jerramungup Shire Pit 9 66 61/26254/13265 Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations 5. Limitations 75 6. References 76 Table Index Table 1 Vegetation Extent and Status of mapped vegetation types in the Study area. 12 Table 2 Summary of fauna species diversity along Collets Road Section 1 18 Table 3 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Collets Road Section 1 19 Table 4 Summary of fauna species diversity along Point Ann Road Section 2 25 Table 5 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Point Ann Road Section 2 26 Table 6 Summary of fauna species diversity along the Devils Creek / Collets Road Intersection 31 Table 7 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Devils Creek / Collets Road Intersection 32 Table 8 Summary of fauna species diversity along MRWA Gravel Pit 1 38 Table 9 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near MRWA Gravel Pit 1 40 Table 10 Summary of fauna species diversity along MRWA Gravel Pit 3 46 Table 11 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near MRWA Gravel Pit 3 47 Table 12 Summary of fauna species diversity at Shire Pit 1a 53 Table 13 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Shire Pit 1a 54 Table 14 Summary of fauna species diversity at Shire Pit 3b 59 Table 15 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Shire Pit 3b 60 Table 16 Summary of fauna species diversity at Shire Pit 9 69 61/26254/13265 Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations Table 17 Conservation significant fauna identified by desktop assessment as occurring or potentially occurring near Shire Pit 9 71 Table 18 Broad Fauna Habitat Descriptions 80 Table 19 Summary of desktop search results for Vertebrate Fauna Species within 10km of each survey area. 83 Table 20 Summary of October 2010 fauna survey results for each survey area 96 Table 21 DEC Database Serach of Declared and Pirority Flora 110 Table 22 Flora Species List for Collets Rd Study Area 112 Table 23 Flora Species for the Point Ann Road Study Area 122 Table 24 Species List for Devils Creek Road Intersection 130 Table 25 Species List for the Point Ann Rd Interection 134 Table 26 Species List for MRWA Gravel Pit 1 137 Table 27 Species List for MRWA Gravel Pit 3 140 Table 28 Species List for Jerramungup Shire Pit 1a 143 Table 29 Species Lise for Jerramungup Shire Pit 3b 147 Table 30 Flora Species List for Jerramungup Shire Pit 4 151 Table 31 Flora Species List for Jerramungup Shire Pit 9 155 Figure Index Figure 1 Study Areas 78 Figure 2 Environmental Constraints 78 Figure 3 Vegetation Types 78 Plate Index Plate 1 Average monthly rainfall and minimum temperatures for Ravensthorpe (Source: Australian Government, Bureau of Meterology, 2010) 10 Plate 2 Unburnt portion of mallee on marine plain habitat at MRWA Gravel Pit 1. 38 Plate 3 Recently burnt (2008) open mallee on marine plain habitat at MRWA Gravel Pit 3. 45 Plate 4 Open mallee vegetation at Shire Pit 1a. 52 61/26254/13265 Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations Plate 5 Low open forest of Melaleuca calycina 64 Plate 6 Tree Mallee of Eucalyptus uncinata, Eucalyptus pleurocarpa and Eucalyptus falcate 65 Plate 7 Vegetation from Shire Pit 4 65 Plate 8 Old Malleefowl mound in medium/dense mallee vegetation at Shire Pit 9 68 Plate 9 Banksia heath vegetation at Shire Pit 9 68 Appendices A Figures B Fauna Habitats C Flora and Fauna Glossary D Flora Species Lists 61/26254/13265 Fitzgerald River National Park Road Upgrade Flora and Fauna Investigations Executive Summary Main Roads Western Australia (MRWA) in conjunction with the Shire of Jerramugup (Shire) and the Department of Environment and Conservation (DEC) are preparing to undertake a works program to upgrade access roads both within and leading into the Fitzgerald River National Park (FRNP). In addition to the upgrade of the access roads, several gravel pits have been identified both inside and out side of the FRNP. These gravel pits are required for road base building material. GHD Pty Ltd (GHD) was engaged to undertake flora and vegetation survey and fauna assessment. The purpose of the study is to provide necessary biological survey information to support clearing remnant vegetation to within the footprint of the proposed works as required. The Project Study Areas are broadly defined as: 20m either side of a 5km section of the existing Point Ann Road at the eastern end of the road (Point Ann Section 2); 20m either side of a 5km section of Collets Road from the western boundary of the FRNP (Collets Road Section 1); A realignment of the intersection at Devils Creek Road and Collets Road (Devils Creek/Collets Road Intersection); A realignment of the intersection at Collets Road and Point Ann Road (Collets/Point Ann Road Intersection); Two gravel pits within the FRNP (MRWA Gravel Pits 1, 3); and Three gravel pits outside of the FRNP in the vicinity of Swamp Road (Shire Pits 1a, 3b, 4 & 9). Flora and fauna investigations of the above study areas were conducted between the 11th and 16th of October 2010 and the 15th and 16th of November 2010. The results of the assessment are summarised below: Flora Survey Over 300 species of vascular flora were identified as occurring in the study areas. 17 Vegetation units were identified within the study areas. Of the seven (7) priority flora species that were listed in FloraBase (DEC, 2010) as being present in the Study area, only two (2) Priority 2 (P2) species of priority flora were identified in the study areas during the field surveys. These included: - Hibbertia acrotichion, which was recorded along the Collets Road section and at Shire Pits 3b and 9; and - Acacia leoiderma, which was recorded at Shire Pit 4. No Declared Rare Flora (DRF) species were identified in the study areas during the field surveys. In general, the vegetation condition in the study areas was in good condition, however some portions of the study area (i.e. within the National Park) had been recently burnt (i.e 2008), and the Shire Pits (with the exception of Shire Pit 9), outside of the national park were also affected by some weed encroachment along the road verge. 61/26254/13265 Fitzgerald River National Park Road Upgrade 1 Flora and Fauna Investigations Fauna Survey A total of 36 bird, seven mammal, 15 reptile and one amphibian species were recorded during the October survey within the above study areas. Two species identified as Priority 4 species under the Western Australian Wildlife Conservation Act 1950 were recorded within the project survey areas. These included: - The Western Whipbird, which was recorded along the Collets Road section and at Shire Pit 9; and - The Western Brush Wallaby, which was recorded along both 5km sections of road. Evidence of one significant fauna species was identified during the surveys. A Malleefowl mound was recorded at Shire Pit 9. The mound appeared to not have been used for possibly over 100 years as it had a mature Mallee tree growing up through the mound. No evidence of more recent activity was observed. The Malleefowl is listed under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) as a both Vulnerable and Migratory species. It is also listed as a threatened species under the Western Australian Wildlife Conservation Act 1950. No further evidence was recorded of any other conservation significant species as occurring within or utilising the study areas. In summary, the results of the fauna survey indicate that with appropriate management measures in place there are unlikely to be any significant constraints relating to the fauna which occur within the survey areas. 61/26254/13265 Fitzgerald River National Park Road Upgrade 2 Flora and Fauna Investigations 1. Introduction 1.1 Background and Purpose Main Roads Western Australia (MRWA) in conjunction with the Shire of Jerramugup (Shire) and the Department of Environment and Conservation (DEC) are preparing to undertake a works program to upgrade access roads both inside and leading into the Fitzgerald River National Park (FRNP). In addition to the upgrading of the access roads several gravel pits have been identified both inside and out side of the FRNP required for road base building material.