Warrawee Substation - Review of Environmental Factors

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There is a thin strip of predominately native understorey species which occurs along the edge of therailway cutting in the north of the site. The over-storey has been cleared and the vegetation does notexceed 1 m in height. This strip is dominated by Spiny-headed Mat-rush (Lomandra longifolia) andBracken (Pteridium esculentum) with scattered shrubs such as Leucopogon lanceolatus and MontpellierBroom (Genista monspessulana*). There are a variety of native herbs, climbers and grasses such asKangaroo Grass (Themeda australis), Small-leaf Glycine (Glycine microphylla) and Pastel Flower(Pseudathemum variabile). Given the lack of over-storey, small area and level of weed encroachmentinto this remnant it is not possible to map this area as a native vegetation community type.Noxious WeedsThe Noxious Weeds Act 2003 provides for the declaration of noxious weeds in local government areas.Landowners and occupiers must control noxious weeds according to the control category specified in theAct. Public authorities must control noxious weeds according to the control category to the extentnecessary to prevent their spread to adjoining land. The site contains 16 species declared as noxiousweeds in the Hornsby Local Government Area (LGA), as shown in Table 1 below.Table 1Declared noxious weeds of the Hornsby LGA recorded during the field survey.SpeciesControlcategoryLegal RequirementsAsparagus fern [Asparagus aethiopicus] 4Balloon vine [Cardiospermum grandiflorum] 4Blackberry [Rubus fruticosus aggregatespecies]4Bridal Creeper (Asparagus asparagoides) 4Camphor laurel (Cinnamomum camphora) 4Cape Ivy (Delairea odorata) 4Lantana (Lantana camara*) 4Madeira vine (Anredera cordifolia) 4The growth of the plant must be managed in amanner that reduces its numbers spread andincidence and continuously inhibits itsreproduction and the plant must not be soldpropagated or knowingly distributedMorning Glory (Ipomoea indica) 4Ochna (Ochna serrulata) 4Trad (Tradescantia fluminensis) 4Turkey Rhubarb (Acetosa sagittata) 4Broad-leaf Privet (Ligustrum lucidum) 4 The growth of the plant must be managed in a21/19721/1780113
SpeciesControlcategoryLegal RequirementsNarrow-leaf Privet (Ligustrum sinense) 4 manner that reduces its numbers spread andincidence and continuously inhibits itsflowering and reproductionRhizatomous Bamboo (Phyllostachys sp.) 4 The growth of the plant must be managed in amanner that continuously inhibits its vegetativereproduction and the plant must not be soldpropagated or knowingly distributedCape Broom (Genista monspessulana) 3 The plant must be fully and continuouslysuppressed and destroyedFaunaThirteen bird species, three reptile species and two frog species were recorded opportunistically duringthe site visit, including two exotic bird species (see Appendix A). No threatened fauna species wereobserved: only common, generalist species typical of highly disturbed urban areas were recorded.Habitats at the site would have limited value for native fauna, given the degree of disturbance observedand lack of native vegetation.The aggressive Noisy Miner (Manorina melanocephala) was the most frequently observed andapparently dominant bird species at the site. Other species observed were typically large birds commonin urban gardens, such as the Sulphur-crested Cockatoo (Cacatua galerita), Rainbow Lorikeet(Trichoglossus haematodus), and Red Wattlebird (Anthochaera carunculata). Dense stands of exoticvegetation would have potential value as shelter habitat for small birds, but these stands are small andfragmented and would have limited value for most bird species given the observed presence ofaggressive species such as the Noisy Miner.Flooded areas of the site would support small numbers of common frog species such as the CommonEastern Froglet (Crinia signifera) and Striped Marsh Frog (Limnodynastes peronii), which were recordedduring the site visit. Eastern Water Skinks (Eulamprus quoyii) were also observed basking near theculvert outlets. The drainage line to the south of the site and flooded grassy areas would provide habitatfor these common, generalist frogs and reptiles and other such species able to persist in urbanenvironments. There is no habitat for any threatened frogs or aquatic fauna at the site.1.1.1 Conservation significanceIn summary, the site comprises highly disturbed vegetation with few habitat resources for native fauna,and is therefore considered to have low conservation significance. There is no vegetation at the sitewhich would correspond to any threatened ecological community, and it is considered highly unlikely thatany threatened flora species would occur. Four threatened fauna species and two migratory birds mayoccur at the site on an occasional or opportunistic basis, but would be highly unlikely to be dependent onhabitats at the site for their conservation in the locality.21/19721/1780114
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PreliminariesWarrawee Station and t
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The proposalBuilding formFacilities
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ReferencesAppendix COperational noi
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APPENDIX BMEASURED ONE THIRD OCTAVE
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ReferencesAppendix DAHIMS Search Re
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AHIMS Basic SearchPage 1 of 1Welcom
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