Oakajee port and rail opr rail development vegetation and flora assessment
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- Total System Area in Study Area (ha) % in the
- Study Area % With No to Minor erosion % With Moderate
- Cons Sig Flora Recorded % of Priority Flora Records
- Associated With the System
- 7.3.2 Beard Mapping Analysis
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
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Land or Soil Landscape System Area in WA (ha) % of the Total System Area in Study Area (ha) % in the Study Area % of Native Vegetation Remaining Within the Study Area % With No to Minor erosion % With Moderate to Severe Erosion % That is Severely Degraded & Eroded No of Cons Sig Flora Recorded % of Priority Flora Records Density of Priority Flora Records (per ha) Vegetation Communities Associated With the System Land
System
Mulline 19,688 0.5
89 <0.1 ‐ 100 ‐ ‐ ‐ 0.0 ‐ n/a Nerramyne 250,958
2.3 5,752
2.6 ‐ 93 7 0.4
3 0.2
1150.4 Yh2, Yp1, Yp2, Yp5 Norie 211,177
1.1 2,393
1.1 ‐ 100 ‐ ‐ 4 1.1 108.8
Mh11, Mh12, Mh17, Mp10 Pindar
151,876 0.4
646 0.3
‐ 100
‐ ‐ 1 0.1 323.2
Yp4 Sherwood 1,579,691 0.6
9,636 4.3
‐ 89
11 2.1
12 5.9
79.6 Mh13, Mp5, Mp6, Mc5 Tallering 32,949
3.2 1,045
0.5 85.4
100 ‐ ‐ ‐ 0.0
‐ Yh1, Yp2 Tindalarra 713,173
4.1 29,231
13 ‐ 96 4 1.6
8 4.5
321.2 Yp2, Yp5, Yf1, Yf2, Yf5, Yc1, Yc2 Violet 584,096
0.3 1,981
0.9 ‐ 98 2 0.2
4 1.1
90.1 Mp8
Waguin 317,146
0.2 586
0.3 ‐ 99 1 ‐ 3 0.6 48.9
Mh18 Weld
37,235 9.7
3,604 1.6
‐ 100
‐ ‐ 7 3.7 48.0
Mh1, Mh2, Mh3, Mh4, Mh5, Mh6, Mh8, Mc3, Mc4 Wiluna 258,978
0.3 814
0.4 ‐ 99 1 ‐ 3 2.0 20.3
Mh15 Yandil
494,525 0.6
3,055 1.4
‐ 95
5 3.2
2 0.5
305.5 Mr3, Mp2, Mp3, Mp4, Mp5, Mp8, Mp9, Mp11, Mp12, Mc5 Yanganoo 2,019,907 1.8
35,446 15.7
‐ 98
2 0.8
8 6.3
276.9 Yp5, Yc2, Mp7, Mc5, Mc6, Mc7, Mc8 Yarrameedie 68,324 10.3
7,045 3.1
‐ 100
‐ ‐ 5 1.0 335.5
Mh3, Mh5, Mh7 Yewin
45,709 3.7
1,692 0.8
‐ 89
11 3.4
1 0.3
241.8 Yf4, Yf5
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
131
7.3.2 Beard Mapping Analysis Assessment of the significance at a state level of the vegetation of the Study Area is constrained by the lack of mapping across the state at a scale comparable to the mapping during the current survey. The only source of vegetation mapping available across the state is that conducted by Beard (1976) and Beard & Burns (1976) at a scale of 1:1000000, with areas of the south‐west mapped at 1:250,000. The vegetation of the Study Area was mapped as 28 communities by Beard (1976) and Beard & Burns (1976). As this mapping was completed at a large scale, it does not accurately represent the mapped communities in the Study Area. Quite often one or a number of the vegetation communities mapped during the current survey can be attributed to a Beard vegetation unit, where it becomes a useful tool to loosely determine the potential extent of this community in the region. As the Beard mapping was completed at a high scale many minor details including drainage channels, creeklines and low hill slopes are not mapped and cannot be related to the Beard mapping. As this mapping was completed in 1976 old species names used by Beard could be referring to a newly described species. A summary table for each Beard unit is provided in Table 7.2 and are further described below; The Beard mapping has been completed as if it was pre‐European settlement, therefore the areas in the Freehold section of the Study Area are inaccurate as they don’t take any land clearing into consideration. Areas of remnant vegetation in the Geraldton Sandplains region have been mapped and overlain over the Beard vegetation map to give an idea of the amount of each remaining (Table 7.3).
a1,14Si is a moderate to large and widespread Beard unit that is mapped as 1.1% of the Study Area. Of the total area of the Beard unit, 0.6% occurs within the Study Area. The vegetation communities related to this unit include those associated with the Jack Hills PEC; Mh1, Mh2, Mh3, Mh4 and Mc3 and those associated with the Weld Range PEC; Mh5, Mh6, Mh7, Mh8, Mc3 and Mc4. The distribution of this vegetation unit includes many of the BIF ranges in Western Australia and because the vegetation communities vary substantially between each BIF range, it does not accurately represent the potential distribution of these ecologia vegetation communities.
steppe.
a1,8Sr k1,2Ci is a small to moderate and restricted Beard unit that is mapped as 1.5% of the Study Area. Of the total area of the Beard unit, 1.6% occurs within the Study Area. The vegetation communities related to this unit include those associated with the salt lake floodplains near Weld Range: Mf1, Mf2 and Mf3. The distribution of the Beard unit in Western Australia includes the floodplains from a number of different land systems and because these vary substantially, it is unlikely to be an indicator for the regional distribution of the ecologia communities. It does however indicate areas with the potential for these vegetation units to occur, which shows that there is not much in Western Australia and are therefore significant. a1,9Li: Acacia aneura, Acacia ramulosa var. ramulosa and Acacia ramulosa var. linophylla low woodland. a1,9Li is a small and restricted Beard unit that is mapped as 3% of the Study Area. Of the total area of the Beard unit, 7.3% occurs within the Study Area. The vegetation communities related to this unit include those associated with the red sandplains, Mr2. The distribution of this
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
132
vegetation unit is not an accurate representation of the potential distribution of the ecologia vegetation community. a10,11Si k1,2Ci: Acacia victoriae, Acacia xiphophylla and Acacia eremaea with Atriplex and Maireana spp. succulent steppe. a10,11Si k1,2Ci is a small and restricted Beard unit that is mapped as 1% of the Study Area. Of the total area of the Beard unit, 3% occurs within the Study Area. The vegetation communities related to this unit include; Yf3 and Mc1. The distribution of this vegetation unit loosely represents the potential distribution of the ecologia vegetation communities and shows that they are represented out side of the Study Area.
a14Si is a very small and restricted Beard unit that is mapped as 0.1% of the Study Area. Of the total area of the Beard unit, 3% occurs within the Study Area. The vegetation communities related to this unit include that associated with the Tallering Peak PEC, Yh1. The distribution of this vegetation unit represents the potential distribution of the ecologia vegetation community, showing that it is very restricted and uncommon locally and regionally. a1Li: Acacia aneura low woodland. a1Li is the largest and most widespread Beard unit that is mapped as 24% of the Study Area. Of the total area of the Beard unit, 0.2% occurs within the Study Area. The ecologia vegetation communities related to this unit include those recorded on the hardpan plains across the Yalgoo and Murchison bioregions, including; Mp6, Mp9, Mp11, Mp12, Mc5, Mr3, Mh5, Mp5, Mh9, Mh10, Mh14, Mp1, Mp2 and Mp8. The large area covered by this vegetation unit shows that the potential distribution of the ecologia vegetation communities associated with it are widespread and common in Western Australia. a1Li a9,17Si: Acacia aneura low woodland with understory of Acacia ramulosa var. ramulosa, Acacia ramulosa var. linophylla and Acacia grasbyi. a1Li a9,17Si is a very large and widespread Beard unit that is mapped as 13.4% of the Study Area. Of the total area of the Beard unit, 2.7% occurs within the Study Area. The vegetation communities related to this unit include those associated with floodplains of the Yalgoo region, including; Yp5 and Yp6. The large area covered by this vegetation unit shows that the potential distribution of the ecologia vegetation communities associated with it are widespread and common in Western Australia.
a1Lp is a very large and widespread Beard unit that is mapped as 16.3% of the Study Area. Of the total area of the Beard unit, 0.5% occurs within the Study Area. The vegetation communities related to this unit include those associated with the sandy plains in the Murchison region, including; Mp2, Mp3, Mp4, Mr1, Mr2, Mr3. The distribution of this vegetation unit shows that the common ecologia vegetation communities represent a large potential distribution in Western Australia.
a1Si is a very large and widespread Beard unit that is mapped as 3.5% of the Study Area. Of the total area of the Beard unit, 0.1% occurs within the Study Area. The vegetation communities related to this unit include those associated with rockier areas, including; Mh10, Mh11, Mh12, Mh15, Mh16, Mp6, Mp9 and Mp10. The distribution of this vegetation unit shows that these ecologia communities have the potential to occur over a large area in Western Australia and are not significant.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
133
a33Sc: Acacia rostellifera thicket. a33Sc is a very small and restricted Beard unit that is mapped as 0.5% of the Study Area. Of the total area of the Beard unit, 35.9% occurs within the Study Area. The vegetation community related to this unit include; Gc2. Gc2 is therefore very significant in the Study Area as such a large percentage of its total is mapped. This is therefore a very significant vegetation community, as it was more than likely locally abundant as mapped by Beard, but is now largely cleared. Based on the known current extent of this vegetation unit in the Geraldton Sandplains region, 75% occurs within the Study Area. This unit has half of its known distribution in the Geraldton Sandplains region and is moderately endemic.
a8,9Sr k1,2Ci is a small to moderate and restricted Beard unit that is mapped as 0.05% of the Study Area. Of the total area of the Beard unit, 0.1% occurs within the Study Area. It therefore is not widespread in the Study Area and any impact to this unit is unlikely. a8Sr k1,2Ci: Acacia sclerosperma with Atriplex and Maireana spp. succulent steppe. a8Sr k1,2Ci is a small and restricted Beard unit that is mapped as 0.8% of the Study Area. Of the total area of the Beard unit, 11.9% occurs within the Study Area. The vegetation communities related to this unit include those associated with major creeklines in the Yalgoo area and include; Yc1, Yf4 and Yf5. The distribution of this vegetation unit shows that the potential distribution of the associated ecologia vegetation communities in Western Australia is limited and are therefore significant.
a9,19Si is a large and widespread Beard unit that is mapped as 1.6% of the Study Area. Of the total area of the Beard unit, 0.5% occurs within the Study Area. The vegetation communities related to this unit include those associated with hardpan plains, including; Yp2 and Yp6. The distribution of this Beard vegetation unit shows that these ecologia communities have the potential to occur over a large area in Western Australia and are not significant. a9,20Si: Acacia ramulosa var. ramulosa, Acacia ramulosa var. linophylla and Acacia murrayana scrub. a9,20Si is a moderate to large and fairly widespread Beard unit that is mapped as 1.4% of the Study Area. Of the total area of the Beard unit, 1.5% occurs within the Study Area. The vegetation communities related to this unit include those associated with hardpan plains and sandy plains; Yp2 and Yy1. The distribution of this Beard vegetation unit shows that these
are not significant. a9Si: Acacia ramulosa var. ramulosa and Acacia ramulosa var. linophylla scrub. a9Si is a very large and widespread Beard unit that is mapped as 3.4% of the Study Area. Of the total area of the Beard unit, 0.6% occurs within the Study Area. The vegetation communities related to this unit include those associated with sandy plains of the Yalgoo and Murchison regions; Yy1 and Mr2. The distribution of this Beard vegetation unit shows that these ecologia communities have the potential to occur over a large area in Western Australia and are not significant.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
134
acSc: Acacia ‐ Casuarina spp. thicket. acSc is a moderate to large and widespread Beard unit that is mapped as 0.2% of the Study Area. Of the total area of the Beard unit, 0.1% occurs within the Study Area. The vegetation communities related to this unit include those associated with floodplains and includes; Yp3 and Gf2. The distribution of this Beard vegetation unit shows that these ecologia communities have the potential to occur over a large area in Western Australia and are not significant, however as it is such a small area within the Study Area, this Beard unit was not seen in
Geraldton Sandplains region, only 1% occurs within the Study Area. anSi: Mixed Acacia spp. scrub. anSi is a moderate to large and widespread Beard unit that is mapped as 8.1% of the Study Area. Of the total area of the Beard unit, 4.9% occurs within the Study Area. The vegetation communities related to this unit include those associated with the sandy‐clay plains and includes; Yp1, Yp2, Yp5 and Yf5. The distribution of this Beard vegetation unit shows that these ecologia communities have the potential to occur over a large area in Western Australia and are not significant.
ceLr a9Si is a large and widespread Beard unit that is mapped as 1.3% of the Study Area. Of the total area of the Beard unit, 0.6% occurs within the Study Area. The vegetation communities related to this unit include those associated with sandy plains and includes; Yp2 and Yp3, however based on the known current extent of this vegetation unit in the Geraldton Sandplains region, none remains in the Study Area. e6,8Mi: Eucalyptus loxophleba and Eucalyptus salmonophloia sclerophyll woodland. e6,8Mi is a large and widespread Beard unit that is mapped as 0.1% of the Study Area. Of the total area of the Beard unit, 0.04% occurs within the Study Area. The vegetation community that is related to this unit is associated with red sandy plains and includes; Gy2. The distribution of this Beard unit shows that the ecologia community has the potential to occur over a large area in Western Australia and is not significant. Based on the known current extent of this vegetation unit in the Geraldton Sandplains region, 36% occurs within the Study Area, however this unit is not endemic to this region (0.28% of the total area is in the Geraldton Sandplains), the actual impact is likely to be a lot less.
e6c5Mr a9,19Si is a small and restricted Beard unit that is mapped as 2.7% of the Study Area. Of the total area of the Beard unit, 10.8% occurs within the Study Area. The vegetation community related to this unit include that associated with floodplains of the Geraldton Sandplains region and includes; Gf2. The distribution of this Beard unit represents the potential distribution of the ecologia vegetation community, showing that it is very restricted and is likely to be uncommon locally and regionally. Based on the known current extent of this vegetation unit in the Geraldton Sandplains region, 24% occurs within the Study Area, however this unit is not endemic to this region (31% of the total area is in the Geraldton Sandplains) and the actual impact is likely to be a lot less.
Oakajee Port and Rail OPR Rail Proposal – Vegetation and Flora Assessment
May 2010
135
e6Mr a19Si: Acacia acuminata scrub with scattered Eucalyptus loxophleba. e6Mr a19Si is a small to moderate and fairly restricted Beard unit that is mapped as 3.8% of the Study Area. Of the total area of the Beard unit, 4.7% occurs within the Study Area. The vegetation communities related to this unit include those with floodplain of the Geraldton Sandplains region and includes; Gp1 and Gf2. The distribution of this vegetation unit represents the potential distribution of the ecologia vegetation community, showing that it is very restricted and is likely to be uncommon locally and regionally and is endemic to the Geraldton Sandplains region. Based on the known current extent of this vegetation unit in the Geraldton Sandplains region, 4% occurs within the Study Area.
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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