Public Environment Report Tarkine Forest Drive ... - Transport

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No threats to this species will be derived from this action. None of the activities listedabove are likely to be changed by the proposed action.There are no known pests or diseases that impact on this species. Neither thepreferred grassy habitat nor the species is susceptible to Phytophthora cinnamomi. Fireoutbreaks are not likely to adversely affect this species as the habitat is unlikely to beflammable during the spring flowering period. Orchids are adapted to fire and typicallybenefit from periodic burns. Fire is used as a tool for habitat management (ThreatenedSpecies Section 2010).SurveyThe record from Arthur Pieman Conservation Area is described as Tiger Flats (SegmentB), an area renowned for several other threatened orchid species. It has not beenrecorded since 1990 and location information is uncertain (NBES 2011).The roadside in the vicinity of potential habitat were targeted for survey (as outlinedin section 4.9.2).Fire promotes flowering in this species. The area burnt in autumn 2009 between theaccess tracks to Sarah Ann Rocks and Couta Rocks had the greatest potential to haveflowering plants of this species evident in the spring of 2009. Targeted searchesundertaken in November 2009 (during the peak flowering period) did not record thisspecies, although the Tiger Flats area had not been subject to fire (NBES 2011).4.10.5 Pretty Leek-orchid (Prasophyllum pulchellum)AbundanceThe estimated total population of pretty leek-orchid was 130 plants in 2000(Threatened Species Unit 2000c). There were five populations with one in thenorthwest in the vicinity of Arthur River Road / Bluff Hill Point Road junctionapproximately 2km north of Arthur River township. Since that time it has been found tobe more widespread in the region being recorded from three separated roadside siteson the Western Explorer (9-20km south of the Tarkine Forest Drive), plus two sites offTemma Road. One of these is approximately 2km south of the Couta Rocks Rd junction,but the latest observation (from spring 2011) located a patch of 6 plants less than200m east of the Temma Road adjacent to Segment B. Total numbers in the northwest, based on Natural Values Atlas data, appear to be as many as 150 individualssuggesting the overall population is significantly elevated above that known in 2000and reported in the Listing Statement at the time.Recent observations are well dispersed, in contrast to some of the other localisedorchids. It is likely that there are other currently unrecorded populations in moreremote sites that are less easily accessed. The habitat of these new records isextensive in the area, unlike some of the other orchids described in this section.Distribution, ecology and habitat preferencePretty leek-orchid is endemic to Tasmania, but is widespread, with records from thecentral north, the Tasman Peninsula and the far south east (Figure 4.8). The area ofoccupancy has not been quantified, but was considered to be
The species potentially flowers from late October to December with peak flowering inNovember (Wapstra et al. 2010), but only following fire. Consequently manypopulations remain unobserved for many years.Figure 4.8 - Distribution of pretty leek orchid (Source: Natural Values Atlas March 2012)Ref: HB09080H001 PER Tarkine Drive 33P Rev 00/DL/CL/jw 59
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Public Environment ReportTarkine Fo
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Figure 4.8 - Distribution of pretty
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1. General informationFor convenien
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1.5 Background to the development o
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Extended visitor stays - most visit
Page 13 and 14: Tarkine tourism development strateg
Page 15 and 16: For example:The Tarkine has been id
Page 17 and 18: Current mining leasesTasmanian Adva
Page 19 and 20: The objectives of conservation area
Page 21 and 22: 2. Description of the actionIn rela
Page 23 and 24: 2.1 Construction programming approa
Page 25 and 26: IDFGHIJKLSectionDescriptionBlackwat
Page 27 and 28: 2.3.1 Construction methodWorker ind
Page 29 and 30: Equipment and machineryThe specific
Page 31 and 32: Figure 2.3 - Proposed bridge replac
Page 33 and 34: Precast concrete piers and abutment
Page 35 and 36: 2.5 Tourism infrastructure worksThe
Page 37 and 38: Table 3.1 - Overview of potential i
Page 39 and 40: 4.1 AltitudeThe Tarkine Forest Driv
Page 41 and 42: 722131 TrowuttaThis land system has
Page 43 and 44: 4.8 Other important or unique value
Page 45 and 46: All potential habitats were inspect
Page 47 and 48: Eagle nest habitatForestry Tasmania
Page 49 and 50: Table 4.3 - Summary of the survey r
Page 51 and 52: PERReferenceNo furtheranalysis inPE
Page 53 and 54: Eight EPBC Act listed threatened fl
Page 55 and 56: Figure 4.2 - Distribution of Arthur
Page 57 and 58: Figure 4.4 - Threatened flora from
Page 59 and 60: Figure 4.5 - Distribution of large
Page 61 and 62: The potential for stochastic risk,
Page 63: Figure 4.7 - Distribution of northe
Page 67 and 68: Figure 4.9 - Distribution of short
Page 69 and 70: Figure 4.10 - Distribution of weste
Page 71 and 72: 4.10.8 Windswept Spider Orchid (Cal
Page 73: Known threatsThe key threat to wind
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Public Environment Report Tarkine Forest Drive ... - Transport

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