Oakajee port and rail opr rail development vegetation and flora assessment
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- Regional Information Local Information Known Distribution (km) Total
- Recorded Within Study Area % Total Number of Plants Within the Study
- Locations Within the Study Area
- Conservation Code Taxa Assigned Conservation Significance
- Number of Plants Total Number of Locations Number of Plants
- Area Number of Locations Recorded Within the Study Area % All
- Figure 8.1 – Distribution of Caladenia hoffmanii
- Figure 8.2 – Distribution of Eucalyptus blaxellii
- Philotheca wonganensis
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Conservation Code Taxa Assigned Conservation Significance Regional Information Local Information Known Distribution (km) Total Number of Plants Total Number of Locations Number of Plants Recorded Within Study Area % Total Number of Plants Within the Study Area Number of Locations Recorded Within the Study Area % All Locations Within the Study Area P3
Acanthocarpus parviflorus Low(a)
330 715
72 18
2% 3 4% P3 Arnocrinum drummondii Low(a)
600 101
7 10
10% 1 14% P3 Baeckea sp. Walkaway Low(a)
117 1,206
29 4 0.3% 2 7%
P3 Blackallia nudiflora Low(a)
85 (outlier to 340 km)
2,069 28
22 1%
1 4%
P3 Calytrix erosipetala Low(a)
550 2,117
45 109
5% 10
22% P3
Calytrix formosa Low(a)
230 201
24 3 1% 2 8%
P3 Calytrix uncinata Low(a)
530 1,252
49 18
1% 6 12% P3 Calytrix verruculosa Low(b)
160 1,091
62 871
80% 51
82% P3
Dicrastylis linearifolia Low(a)
420 1,720
39 274
16% 15
38% P3
Dodonaea amplisemina Low(b)
480 1,466
171 754
51% 96
56% P3
Eremophila arachnoides subsp. arachnoides Moderate 580 266
10 45
17% 4 40% P3 Eremophila muelleriana Low(b)
300 593
129 558
94% 119
92% P3
Gastrolobium propinquum Low(a)
80 (outlier to 130 km)
374 26
1 0.3%
1 4%
P3 Gastrolobium rotundifolium Low(a)
650 387
30 11
3% 5 17% P3 Geleznowia verrucosa subsp. Kalbarri Moderate 355 459
37 78
17% 7 79% P3 Gnephosis cassiniana Low(a)
130 (outlier to 284 km) 12,040 13
3 0.1%
2 15%
P3 Grevillea candicans Moderate 165 (outlier to 400 km) 75 28
10 13%
3 11%
P3 Grevillea stenostachya Low(b)
360 657
224 388
59% 158
71% P3
Grevillea triloba Low(b)
110 15,734
493 5,924
38% 345
70% P3
Hemigenia tysonii Low(b)
282 8,239
280 5,904
72% 197
70% P3
Hemigenia virescens Low(b)
330 5,439
120 5,115
94% 112
93%
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Conservation Code Taxa Assigned Conservation Significance Regional Information Local Information Known Distribution (km) Total Number of Plants Total Number of Locations Number of Plants Recorded Within Study Area % Total Number of Plants Within the Study Area Number of Locations Recorded Within the Study Area % All Locations Within the Study Area P3
Homalocalyx echinulatus Moderate 620 862
51 218
25% 11
22% P3
Indigofera gilesii subsp. gilesii Low(a)
581 123
16 1 1% 1 6%
P3 Lasiopetalum oppositifolium Low(a)
115 (outlier to 560 km) 351 49
79 22%
2 4%
P3 Lepidium scandens Low(a)
60 (outlier to 400 km)
54 5 1 2% 1 20% P3 Microcorys tenuifolia Low(a)
400 200
17 7 4% 6 35%
P3 Micromyrtus placoides Low(a)
180 3,955
80 11
0.3% 4 5% P3 Petrophile pauciflora Low(a)
400 429
29 64
15% 8 28% P3 Prostanthera petrophila Low(a)
260 1,607
105 218
14% 26
25% P3
Ptilotus beardii Low(b)
230 4,104
83 2,565
63% 45
54% P3
Ptilotus luteolus Low(a)
600 894
31 315
35% 10
32% P3
Scaevola oldfieldii Low(a)
160 162
12 6 4% 1 8%
P3 Serichonus gracilipes High C
50 76
21 36
47% 13
62% P3
Stenanthemum divaricatum Low(a)
500 17
12 1 6% 1 8%
P3 Tecticornia cymbiformis Moderate 290 66
8 11
17% 2 25% P3 Thryptomene sp. Moresby Range Very High 30 1,834
61 1,459
80% 38
62% P3
Thryptomene sp. Wandana Moderate 130 (outlier at 330 km) 747 22
684 92%
8 36%
P3 Verticordia chrysostachys var. pallida Moderate 180 262
35 86
33% 8 23% P3 Verticordia densiflora var. roseostella Moderate 250 439
59 83
19% 4 7% P3 Verticordia jamiesonii Low(a)
350 590
37 31
5% 6 16% P4 Acacia guinetii Low(a)
40 362
52 47
13% 19
37% P4
Baeckea sp. Melita Station Low(a)
540 1,317
77 88
7% 13
17%
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Conservation Code Taxa Assigned Conservation Significance Regional Information Local Information Known Distribution (km) Total Number of Plants Total Number of Locations Number of Plants Recorded Within Study Area % Total Number of Plants Within the Study Area Number of Locations Recorded Within the Study Area % All Locations Within the Study Area P4
Diuris recurva Low(a)
450 732
28 20
3% 2 7% P4 Eucalyptus blaxellii Nationally significant 68 (outlier to 170 km) 2,948
170 696
24% 64
38% P4
Eucalyptus ebbanoensis subsp. photina Moderate 145 169
25 4 2% 4 16%
P4 Goodenia berringbinensis Low(a)
520 28,191
10 50
0.2% 2 20% P4 Grevillea inconspicua Low(a)
560 2,254
82 68
3% 18
22% P4
Jacksonia velutina Low(a)
200 (outliers to 400 km) 390 35
1 0.3%
1 3%
P4 Lechenaultia longiloba Low(a)
80 264
15 2 1% 1 7%
P4 Verticordia capillaris Low(b)
300 558
83 198
35% 42
51% P4
Verticordia penicillaris Low(b)
190 5,346
121 3,417
64% 77
64% P4
Verticordia polytricha Low(a)
200 (outlier to 475 km) 859 26
6 1%
1 4%
Locations are defined as records of occurrence separated by more than 50 metres. Bold font indicates species recorded by ecologia during the current survey of the Study Area. P1 = Priority 1, P2 = Priority 2, P3 = Priority 3, P4 = Priority 4, Vul = Vulnerable, DRF = Declared Rare Flora
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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8.1 FLORA OF NATIONAL AND STATE CONSERVATION SIGNIFICANCE National significance refers to those features of the environment which are recognised under legislation as being of importance to the Australian community; in particular, species listed under the
environment that are recognised under State legislation as being of importance to the Western Australian community, in particular, species listed as DRF under the WC Act are of state significance. During the current survey, two flora species of national and state significance were recorded in the Study Area: Caladenia hoffmanii (Endangered, DRF) and Eucalyptus blaxellii (Vulnerable, Priority 4). During the database searches, an additional two flora species of national and state significance were recorded in the Study Area; Drummondita ericoides (Endangered, DRF) and Philotheca wonganensis (Endangered, DRF). The significance of these species is discussed below. Caladenia hoffmanii is listed as Endangered under the EPBC Act and as DRF under the WC Act. It is endemic to the Geraldton Sandplains bioregion as shown by the current WA HERB distribution for C. hoffmanii in Figure 8.1 below.
– Distribution of Caladenia hoffmanii Using the information provided in Table 8.2, this species is known from 285 individuals at 38 locations. Of these 93% of the total number of plants were inside the Study Area.
wet flats. A disjunct occurrence is recorded 600 km south‐east of the Geraldton area in the Pinharing area, growing around large granite outcrops. These habitats are not widespread in the Study Area and the region and the large percentage of total individuals (52.3%) recorded in the Study Area indicates a high local endemism for this species. The known populations of C. hoffmanii are severely fragmented and the quality of habitat for many populations is in decline (Pers. com. Murray Baker, DEC, 2009). The EPBC Act conservation advice lists the main threats to C. hoffmanii as fire and grazing by feral pigs and rabbits. Due to the fragmentation of the populations, decrease in habitat quality, the small distribution of known occurrences (50 km with one outlier to 70 km), the high percentage of the total population in the Study Area and the likelihood that it is locally endemic to the area, it is considered that C.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Eucalyptus blaxellii is listed as Vulnerable under the EPBC Act and Priority 4 under the WC Act. It has been recorded in the Geraldton Sandplains and Avon Wheatbelt bioregions as shown by the current WA HERB distribution of E. blaxellii in Figure 8.2 below.
– Distribution of Eucalyptus blaxellii Using the information provided in Table 8.2, this species is known from 2,948 individuals at 170 locations. Of these 24% of the total number of plants were recorded inside the Study Area. The EPBC Act conservation advice states the main threat to E. blaxellii is inappropriate fire regimes, however most known populations are secure as they occur in areas that are unsuitable for farming due to the inaccessibility of the steep slope. Eucalyptus blaxellii grows in sand over laterite, or brown clay on sandstone hills or creek flats which is widespread at the Western end of the Study Area. As these habitats are moderately widespread in the region and as the percentage of total individuals is moderate (16.4%) in the Study Area, it indicates a low to moderate local endemism for this species. E. blaxellii does not appear to be locally restricted with records spaning 70 km and one outlier to 170 km.
recovery abilities and the removal of E. blaxellii from the listing of DRF (WC Act) it is considered that E. blaxellii has low conservation significance in the Study Area.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Drummondita ericoides is listed as Endangered under the EPBC Act and as DRF under the WC Act. It is endemic to the Geraldton Sandplains bioregion as shown by the current WA HERB distribution of D. ericoides subsp. cracens in Figure 8.3 below.
Figure 8.3 – Distribution of Drummondita ericoides Using the information provided in Table 8.2, this species is known from 212 individuals at 12 locations. Of these 5% of the total numbers of plants were recorded inside the Study Area. The DEC’s Moresby Range Drummondita Interim Recovery Plan (DEC, 2004) for D. ericoides states that the main threats include inappropriate fire regimes and high levels of human activity.
the Moresby Range in brown loam or sandy loam and clay soils in areas not suitable for agriculture and so has not been so highly cleared.
therefore has high local significance in the Study Area.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
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Philotheca wonganensis is listed as Endangered under the EPBC Act and as DRF under the WC Act. It has been recorded in the Geraldton Sandplains and Avon Wheatbelt bioregions as shown by the current WA HERB distribution of P. wonganensis in Figure 8.4 below
Using the information provided in Table 8.2, this species is known from 136 individuals at eight locations. Of these 8% of the total number of individuals were recorded inside the Study Area.
very widespread in the region, and the percentage of total individuals (8.1%) recorded in the Study Area indicates a high local endemism for this species. P. wonganensis appears to be locally restricted with most of the known records spanning 30 km, with one outlier to 300 km. Because of the low known population numbers and as 8% of the total known individuals were recorded in the Study Area, impact to the species could result in a significant loss and despite the large percentage (12.6%) of individuals in conservation reserves P. wonganensis has high local conservation significance in the Study Area.
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8.1 FLORA OF REGIONAL SIGNIFICANCE Regional significance addresses the representation of habitats at a biogeographic regional level. Priority Flora taxa that are endemic to the Geraldton Sandplains, Yalgoo and Murchison bioregions and whose distributions are limited or unknown are considered regionally significant. Fifty‐five Priority Flora taxa were recorded during the current survey of the Study Area and an additional 32 were recorded by the DEC searches or other sources as listed in Section 8. Species that are endemic (using information provided from the WA Herb) to one IBRA bioregion include the following; Kataloq: sites -> default -> files -> PER documentation PER documentation -> Opr rail Development Public Environmental Review PER documentation -> Flora and vegetation of aviva lease area PER documentation -> Enclosure 1 2007 Seismic Survey Vegetation PER documentation -> Vegetation and Flora Survey Report PER documentation -> Midwest corporation limited PER documentation -> Tronox management pt y ltd PER documentation -> Flora and vegetation of barrambie survey area, bore fields and water pipeline corridor Yüklə 19,54 Mb. Dostları ilə paylaş:
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