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GERALDTON REGIONAL Flora and Vegetation Survey GERALDTON REGIONAL Flora and Vegetation Survey MARCH 2010 Prepared by the Department of Planning and supported by Ecoscape (Australia) Pty Ltd Western Australian Planning Commission Albert Facey House 469 Wellington Street Perth, Western Australia GERALDTON REGIONAL Flora and Vegetation Survey Disclaimer This document has been published by the Western Australian Planning Commission. Any representation, statement, opinion or advice expressed or implied in this publication is made in good faith and on the basis that the government, its employees and agents are not liable for any dam- age or loss whatsoever which may occur as a result of action taken or not taken, as the case may be, in respect of any representation, state- ment, opinion or advice referred to herein. Professional advice should be obtained before applying the information contained in this document to particular circumstances. © State of Western Australia Published by the Western Australian Planning Commission Albert Facey House 469 Wellington Street Perth Western Australia 6000 Published March 2010 ISBN 0 7309 9955 6 internet: http://www.planning.wa.gov.au email: [email protected] tel: 08 9264 7777 fax: 08 9264 7566 TTY: 08 9264 7535 infoline:1800 626 477 Copies of this document are available in alternative formats on application to the disability services coordinator. ii MARCH 2010 GERALDTON REGIONAL Flora and Vegetation Survey Contents Acknowledgments ix Summary x 1 Introduction 1 1.1 Project background 1 1.2 Project phases 1 1.3 Project area 2 1.4 Technical report and mapping 2 1.5 Beard vegetation associations 3 1.6 Conservation significance determined by previous studies 4 2 Methods 5 2.1 Project outline 5 2.2 Analysis of existing datasets 5 2.3 Field verification and site selection 5 2.3.1 Consideration of alternative approaches to site selection 6 2.4 Floristic quadrat survey 6 2.4.1 Information recorded for each quadrat 6 2.4.2 NVIS data entry 7 2.4.3 Specific quadrat site selection 7 2.4.4 Quadrat orientation and marking 7 2.4.5 Species voucher collection 7 2.5 Statistical analysis 8 2.6 Vegetation mapping 8 2.6.1 Desktop vegetation extent mapping 8 2.6.2 Interpretation of plant communities 8 2.6.3 Field verification 9 2.7 Botanical survey limitations 9 2.7.1 Plant identification 9 2.7.2 Plant community mapping 10 3 Results 11 3.1 Analysis of existing data 11 3.2 Beard vegetation associations 11 3.2.1 Representation of Beard vegetation associations 11 3.3 Floristic quadrats 13 3.3.1 Plant species 14 3.3.2 Vegetation condition 15 3.4 Plant communities 15 3.4.1 Floristic groups from PATN © analysis 15 MARCH 2010 iii GERALDTON REGIONAL Flora and Vegetation Survey 3.4.2 GRFVS plant communities 16 3.4.3 Changes to vegetation extent mapping 16 3.4.4 Plant community mapping 18 4.0 Discussion 20 4.1 Native vegetation in the GRFVS area 20 4.1.1 Legislative and policy framework for native vegetation protection 20 4.1.2 Conservation significance of native vegetation in the GRFVS area 20 4.2 Beard vegetation associations in the GRFVS area 21 4.2.1 Representation of Beard vegetation associations 22 4.3 Identifying and describing GRFVS plant communities 24 4.3.1 Determining GRFVS plant communities 24 4.3.2 Relevance of GRFVS plant communities 24 4.3.3 GRFVS plant community mapping 24 4.3.4 Difficulties with recognising plant communities 24 4.3.5 Historical plant communities 27 4.4 GRFVS plant communities 27 4.4.1 Plant community 1 Estuarine: Casuarina obesa / Tecticornia / Sarcocornia 27 4.4.2 Plant community 2 Riparian: Eucalyptus camaldulensis / Casuarina obesa / Melaleuca rhaphiophylla 28 4.4.3 Plant community 3 Foredune: Atriplex isatidea / Spinifex longifolius 28 4.4.4 Plant community 4 Swale: Ficinia nodosa 29 4.4.5 Plant community 5 Swale: Frankenia pauciflora 29 4.4.6 Plant community 6 Coastal: Thryptomene baeckeacea 30 4.4.7 Plant community 7 Coastal: Melaleuca cardiophylla 30 4.4.8 Plant community 8 Coastal: Acacia rostellifera low shrubland 31 4.4.9 Plant community 9 Coastal: Acacia rostellifera / Eucalyptus spp. 31 4.4.10 Plant community 10 Near Coastal: Acacia rostellifera shrubland 32 4.4.11 Plant community 11 Limestone Ridge: Melaleuca cardiophylla / Eucalyptus spp. 32 4.4.12 Plant community 12 Limestone Ridge: Melaleuca cardiophylla 33 4.4.13 Plant community 13 Sandplain: Banksia prionotes / Acacia rostellifera 34 4.4.14 Plant community 14 Chapman River Reserve: Acacia rostellifera / Melaleuca spp. 35 4.4.15 Plant community 15 Thicket: Melaleuca spp. / mixed spp. 35 4.4.16 Plant community 16 Woodland: Acacia acuminata / Acacia tetragonophylla / Hakea preissii 36 4.4.17 Plant community 17 Woodland: Eucalyptus loxophleba 36 iv MARCH 2010 GERALDTON REGIONAL Flora and Vegetation Survey 4.5 Flora species 37 4.5.1 Threatened species 37 4.5.2 Range extensions and extremities 37 4.5.3 Weeds 37 5.0 Conclusions 38 5.1 Summary of GRFVS findings 38 5.2 Conservation significance of Beard vegetation associations 38 5.3 Conservation significance of GRFVS plant communities 39 5.4 Plant species conservation 40 5.5 Future implementation of GRFVS 40 References 41 Appendices 45 Appendix one: GIS mapping methodology 47 Appendix two: Field methodology 49 Appendix three: Statistical analysis and interpretation 54 Appendix four: Dataset analysis results 59 Appendix five: Maps 73 Appendix six: Floristic quadrat details 97 Appendix seven: Vascular plant species inventory and DEC conservation codes 178 Appendix eight: GRFVS plant communities 191 Tables, Figures, Plates & Maps Tables Table 1: The NVIS information hierarchy (National Heritage Trust 2003) 3 Table 2: Representation of Beard vegetation associations 12 Table 3: Quadrat locations in relation to Beard vegetation associations 13 Table 4: Keighery (1994) bushland condition rating of quadrats 15 Table 5: Braun-Blanquet (1983) weed cover abundance of floristic quadrats 15 Table 6: Interpretation used to divide floristic groups into plant communities. 17 Table 7: Changes to 2006 native vegetation extent mapping 18 Table 8: Extent of GRFVS plant communities. 19 Table 9: Anticipated potential mapping issues. 25 Table A2.1: NVIS information hierarchy (National Heritage Trust 2003). 50 Table A2.2: NVIS height classes (National Heritage Trust 2003). 51 Table A2.3: Keighery bushland condition rating scale 51 MARCH 2010 v GERALDTON REGIONAL Flora and Vegetation Survey Table A2.4: Braun-Blanquet cover abundance scale, used for weed cover 53 Table A4.1: Soil landscape map unit (subsystem level) of the GRFVS area. 59 Table A7.1: Vascular plant species recorded from floristic quadrats 178 Table A7.2: D EC conservation codes and definitions 190 Figures Figure 1: Geraldton Regional Flora and Vegetation Survey (GRFVS) area 2 Figure 2: Initial floristic group hierarchy, indicating final GRFVS plant community numbers. 16 Figure 3: Areas dominated by Melaleuca lanceolata that are too small to be mapped as a plant community. 26 Figure A3: Dendogram from PATN © Kulczynski analysis 56 Plates Plate A2.1: Pristine condition vegetation, GRV0864 (Wokatherra Gap) 52 Plate A2.2: Excellent condition vegetation (Albert Street, Waggrakine) 52 Plate A2.3: Very good condition vegetation (Sutcliffe Road, Waggrakine) 52 Plate A2.4: Good condition vegetation (Cooper Road, Waggrakine) 52 Plate A2.5: Degraded condition vegetation (David Road, Waggrakine) 52 Plate A2.6: Completely degraded vegetation (Sutcliffe Road, Waggrakine) 52 Plate A8.1.1: Chapman River GRV0859 193 Plate A8.1.2: Rudds Gully GRV0860 193 Plate A8.1.3: Greenough River mouth 193 Plate A8.1.4: Oakajee Nature Reserve 193 Plate A8.2.1: Rum Jungle GRV0808 195 Plate A8.2.2: Chapman River, Moonyoonooka GRV0871 195 Plate A8.3: Glenfield Beach GRV0804 197 Plate A8.4.1: Oakajee GRV0814 199 Plate A8.4.2: near Buller River 199 Plate A8.5: Buller GRV0858 201 Plate A8.6: Cape Burney GRV0849 203 Plate A8.7.1: Greenough River GRV0847 205 Plate A8.7.2: Greenough River 205 Plate A8.8.1: Glenfield Beach GRV0801 207 Plate A8.8.2: Cape Burney GRV0846 207 Plate A8.8.3: Oakajee 207 Plate A8.8.4: Tarcoola Beach 207 Plate A8.8.5: Point Moore 208 Plate A8.9: Southgate GRV0828 210 vi MARCH 2010 GERALDTON REGIONAL Flora and Vegetation Survey Plate A8.10.1: Oakajee GRV0819 213 Plate A8.10.2: Greenough River GRV0848 213 Plate A8.10.3: Greenough GRV0852 213 Plate A8.10.4: Buller GRV0854 213 Plate A8.10.6: Glenfield Beach 213 Plate A8.10.5: Rudds Gully GRV0873 213 Plate A8.11.1: Wandina GRV0827 215 Plate A8.11.2: Rudds Gully GRV0861 215 Plate A8.11.3: Rudds Gully 215 Plate A8.11.4: Wandina 215 Plate A8.11.5: Buller 215 Plate A8.12.1: Oakajee GRV0813 217 Plate A8.12.2: Oakajee GRV0821 217 Plate A8.12.4: Jandanol Park GRV0867 218 Plate A8.12.3: Jandanol Park GRV0866 218 Plate A8.12.5: Jandanol Park GRV0868 218 Plate A8.13.1: Oakajee GRV0822 221 Plate A8.13.2: Waggrakine GRV0834 221 Plate A8.13.3: Waggrakine GRV0837 221 Plate A8.13.4: Narngulu GRV0862 221 Plate A8.13.5: Glenfield GRV0865 221 Plate A8.13.6: Karloo 221 Plate A8.14.1: Chapman River Reserve GRV0877 223 Plate A8.14.2: Chapman River Reserve GRV0878 223 Plate A8.14.3: Chapman River Reserve GRV0881 223 Plate A8.14.4: Chapman River Reserve 223 Plate A8.15.1: Oakajee GRV0840 225 Plate A8.15.1: White Peak GRV0810 225 Plate A8.15.3: White Peak GRV0853 226 Plate A8.15.4: White Peak GRV0855 226 Plate A8.15.6: Buller River 226 Plate A8.15.5: Waggrakine GRV0863 226 Plate A8.16.1: Oakajee GRV0811 229 Plate A8.16.2: Oakajee GRV0823 229 Plate A8.16.3: Howatharra GRV0844 229 Plate A8.16.4: Oakajee 229 Plate A8.17.1: Oakajee GRV0842 231 Plate A8.17.2: Oakajee 231
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