Oakajee port and rail opr rail development vegetation and flora assessment
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- 2.8.1 Vegetation Described by Beard
- Table 2.8 – Beard Vegetation Communities of the Study Area Beard Code Map Unit
- 1:1,500,000 Absolute Scale - Legend
- Figure: 2.12 Project ID: 1131 Drawn: AH Date: 10/07/09 Beard Vegetation of the
Oakajee Port and Rail OPR Rail Development – Vegetation and Flora Assessment
May 2010
27 In 2005, the DEC surveyed Banded Ironstone Formations (BIF) of the Yilgarn Craton, including areas in the Murchison and Yalgoo bioregions: •
Flora and vegetation communities were surveyed in the central Tallering Land System of the Yalgoo bioregion (south of Yalgoo) (Markey & Dillon, 2008a). One hundred and three quadrats were established during the survey and one DRF taxon and 13 Priority Flora taxa were recorded (Table B.1, Appendix B). •
bioregion). Fifty‐two quadrats were established during the survey and six main vegetation communities (and four sub‐communities) were described. Eight Priority Flora taxa were recorded (Table B.1, Appendix B). •
The flora and vegetation of the Jack Hills (Murchison bioregion) were surveyed by Meissner & Caruso (2008). Fifty quadrats were established during the survey and six vegetation communities were described. Four Priority Flora taxa were recorded (Table B.1, Appendix B).
assessment at Weld Range; surveys were completed in 2006, 2007 and 2008. A total of 239 quadrats were established during the surveys and seven vegetation communities (and 16 sub‐communities) were described and mapped. Twenty‐four Priority Flora species were recorded (Table B.1, Appendix B). During 2004/2005, Mattiske (2005) conducted a flora and vegetation assessment at Jack Hills. One hundred and twenty‐two quadrats were established during the survey and 18 vegetation communities were described and mapped. Four Priority Flora taxa were recorded (Table B.1, Appendix B).
2006/2007. One‐hundred and ninety‐five quadrats were established during the survey and six vegetation communities (and 18 sub‐communities) were described. Seven Priority Flora taxa were recorded (Table B.1, Appendix B). A baseline vegetation survey was conducted near Mount Magnet in 1994 by Landcare Services (1995). Quadrats were assessed at eight sites in native vegetation and one rehabilitated waste dump site. The dominant vegetation of the area was Acacia aneura woodlands with a mixed understorey of chenopods and Eremophila species. Of the 206 endemic taxa recorded during the survey, three were Priority Flora: Alyxia tetanifolia (Priority 3), Calytrix erosipetala (Priority 3) and Grevillea
Alan Tingay & Associates (1998) completed an environmental appraisal and management plan for a proposed railway from Tallering Peak to Oakajee. They reported on findings from several vegetation and flora surveys conducted along the route. Eleven vegetation associations were described and 321 flora taxa were recorded. Twelve Priority Flora taxa were recorded along the route: Scholtzia sp. Gunyidi (J.D. Briggs 1721) (Priority 2), Scholtzia sp. Murchison River (A.S. George 7098) (Priority 2), Thryptomene sp. East Yuna (J.W. Green 4639) (Priority 2), Thryptomene stenophylla (Priority 2), Thryptomene sp. Yuna Reserve (AC Burns 100) (Priority 2), Acacia leptospermoides subsp. psammophila (Priority 3), Baeckea sp. Walkaway (A.S. George 11249) (Priority 3), Geleznowia verrucosa (Priority 3), Grevillea candicans (Priority 3), Microcorys tenuifolia (Priority 3), Persoonia pentasticha (Priority 3), and Verticordia capillaris (Priority 4). In 1998, Landcare Services Pty Ltd (1998) conducted a flora and fauna survey from Oakajee to south of Geraldton. Ten vegetation types were described and a total of 117 flora taxa were recorded. Two Priority Flora species were recorded: Grevillea erinacea (Priority 3) and Stenanthemum divaricatum (Priority 3).
Oakajee Port and Rail OPR Rail Development – Vegetation and Flora Assessment
May 2010
28 Dames & Moore (1993) conducted a flora and fauna assessment at Oakajee in 1993. Six vegetation types associated with six distinct terrain types were described and mapped at a scale of 1:25,000. Heaths and shrublands dominated the vegetation, with some minor woodland in river valleys. One hundred and sixty‐five flora taxa were recorded during the survey, including one Priority Flora species ‐ Grevillea triloba (Priority 3). In August 1997 Muir Environmental (1977) conducted a follow‐up survey of the area surveyed by Dames and Moore (1993), as it was extended to include a buffer zone and quarry sites. The vegetation of the six terrain types identified by Dames and Moore (1993) was re‐assessed. Two‐ hundred and seventeen taxa were recorded (52 more than in 1993). One confirmed DRF and two Priority Flora taxa were recorded during this survey: Eucalyptus blaxellii (Vulnerable, Priority 4),
specimen (a cross between Caladenia hoffmanii (DRF) and Caladenia longicauda) indicates that Caladenia hoffmanii may have been present in the area. ecologia (2009c in preparation) completed a single phase vegetation and flora survey (in 2006) followed by a threatened flora survey (in 2009) at Oakajee. Twenty‐one quadrats were assessed during the vegetation and flora survey, and 14 vegetation units were described and mapped at a scale of 1:40,000. One DRF and 10 Priority Flora were recorded during the surveys (Table B.1, Appendix B). A biological survey of the Buller River area was conducted by ecologia (2009d, in preparation) in 2009. Five vegetation units at the sub association level were described and mapped. Sixty‐three flora taxa were recorded, and none of these were DRF or Priority Flora. An ecological survey was conducted by GHD (2009) for a proposed haul road between Jack Hills and Weld Range. Twenty‐five quadrats were assessed during the vegetation and flora survey, and 18 vegetation units were described and mapped. Eight Priority Flora taxa were recorded during this survey (Table B.1, Appendix B). 2.8.1 Vegetation Described by Beard The Study Area lies predominantly in Beard’s (1976) Murchison region of the Eremaean Botanical Province. The Murchison region is well known for the dominance of mulga (Acacia aneura) woodlands, and the extensive flats and plains provide optimum conditions for these woodlands. On the more favourable soils (plains and valleys) Acacia aneura generally grows in the form of a tree with a single erect trunk and forms low woodlands. On less favourable soils (hill slopes and ridges) it takes the form of a shrub producing shrublands/scrublands (Beard, 1976). Most of the Study Area lies in the Upper Murchison subregion in the Murchison region of the Eremaean Botanical Province (Beard, 1976). The vegetation of this area is described as: •
Plains covered by continuous or interrupted Acacia aneura (mulga) low woodlands. Tree deterioration and death is common in this area, and there is very little regeneration of the A. aneura. This has resulted in large areas where only Senna and Eremophila species are present or other Acacia species such as A. victoriae and A. tetragonophylla. •
quadrimarginea and A. ramulosa var. ramulosa or A. ramulosa var. linophylla. Understorey species include Eremophila spathulata and Ptilotus obovatus. The main species at Jack Hills is A. grasbyi (often a tree form) with Eremophila fraseri. Acacia aneura, A. ramulosa var. ramulosa and Acacia tetragonophylla also occur. At Weld Range banded ironstone ridges support two main species – Acacia aneura and Acacia quadrimarginea – additional species include Eremophila latrobei, Scaevola spinescens and Ptilotus obovatus. The lower slopes are covered with Acacia aneura and A. ramulosa var. linophylla.
Oakajee Port and Rail OPR Rail Development – Vegetation and Flora Assessment
May 2010
29 • Sandplain patches consist of Acacia ramulosa var. linophylla scrub, with A. aneura less commonly. While Eremophila leucophylla, Solanum lasiophyllum and Maireana convexa occur as understorey shrubs. •
vesicaria and Frankenia pauciflora, often with scattered Acacia sclerosperma and A. victoriae. Downstream of the Murchison, the main vegetation is Acacia species scrub (A. victoriae, A. sclerosperma and A. tetragonophylla) with scattered Eucalyptus camaldulensis. A section of the Study Area is situated in the Yalgoo subregion in the Murchison region of the Eremaean Botanical Province (Beard, 1976). The vegetation associated with this transitional area, between the Eremaean Botanical Province and the South‐western Botanical Province, is described as: •
desert (arid) to Mediterranean, Acacia aneura decreases and is replaced by other Acacia species. The vegetation also becomes lower and denser in a south‐westerly direction. •
A. ramulosa var. ramulosa, A. grasbyi, A. acuminata and A. tetragonophylla, with scattered A. aneura. The stony hills are dominated by Acacia ramulosa var. ramulosa and A. acuminata scrub, with A. quadrimarginea and A. stereophylla. The sandplains have a rich flora and are dominated by Acacia ramulosa var. ramulosa and A. murrayana. Low‐lying plains support
•
The south‐western portion of the subregion includes thickets of Acacia ramulosa var. ramulosa, A. acuminata and Melaleuca uncinata occurring in midslope positions, while Acacia ramulosa var. ramulosa scrub with scattered Callitris and Eucalyptus species occur in the valleys. A small section of the Study Area incorporates the Talisker vegetation system of the Eremaean Botanical Province. The vegetation of this system is described by Beard & Burns (1976) as: •
scrub with scattered Eucalyptus species and Callitris columellaris. Understorey species include Baeckea pentagonantha, Eremophila clarkei and Grevillea stenostachya. The remaining section lies in the Greenough region of the South‐western Botanical Province, incorporating the Yuna, Kalbarri, Northampton, Greenough and Mullewa vegetation systems (Beard, 1976; Beard & Burns, 1976). The vegetation of these systems is described as: •
species thickets occur on red sandplains; while scrub with mallee and scattered trees occur in red soil depressions. Eucalyptus loxophleba and E. loxophleba‐E. salmonophloia woodlands occur in bottomland soils west of Mullewa. The Greenough River valley is generally covered with Acacia acuminata scrub and scattered Eucalyptus loxophleba. Salt flat vegetation is primarily Tecticornia species and other samphires, with some Atriplex vesicaria and Melaleuca
•
Kalbarri System: the hills support Acacia‐Melaleuca species thickets with Acacia ligulata, Melaleuca eleuterostachya and M. uncinata. Sandplains support a rich scrub heath which covers most of the area ‐ Acacia rostellifera occurs near the coast, Adenanthos cygnorum, Banksia attenuata and B. menziesii inhabit white sands, while Actinostrobus species, Banksia prionotes, B. sceptrum and Xylomelum species occur in yellow sands. Small patches of mallees include Eucalyptus loxophleba, E. eudesmioides and E. dongarraensis. •
species include Gastrolobium oxylobioides, Casuarina campestris, Xanthorrhoea preissii,
Oakajee Port and Rail OPR Rail Development – Vegetation and Flora Assessment
May 2010
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grows taller and more open with Acacia rostellifera, Banksia, Dryandra, Casuarina and
(generally forming steep scarp slopes) and the two dominant communities are Melaleuca megacephala and Hakea pycnoneura and Casuarina campestris and M. uncinata. Acacia acuminata scrub with Hakea species and scattered Eucalyptus loxophleba occur on the lower undulating terrain on granites and granulites, while Allocasuarina campestris thickets occur on gravelly soils and scattered Eucalyptus camaldulensis along drainage lines. •
Greenough System: the rocky ridges support Acacia rostellifera and Melaleuca cardiophylla thickets. Acacia‐Banksia species scrub (dominated by Acacia rostellifera and Banksia prionotes) occurs on sand‐covered limestone. Acacia rostellifera low forests occur on the alluvial flats, recent dunes commonly support Acacia ligulata open scrub, while Eucalyptus camaldulensis and Casuarina obesa occur along creeklines. •
Mullewa System: the sandplains support Acacia‐Casuarina‐Melaleuca thickets, whilst the vegetation of the dissected terrain is Acacia acuminata scrub with scattered Eucalyptus loxophleba and Casuarina huegeliana. Associated species include Acacia tetragonophylla and Hakea preissii, with Senna and Eremophila species forming the lower shrub layer and ephemerals comprising the ground layer. The vegetation of the Study Area was mapped as 28 communities by Beard (1976) and Beard & Burns (1976). These 28 units are described in Table 2.8 and shown in Figure 2.12 to Figure 2.16.
Oakajee Port and Rail OPR Rail Development – Vegetation and Flora Assessment
May 2010
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– Beard Vegetation Communities of the Study Area Beard Code Map Unit Vegetation Community a1,14Si
Acacia aneura and Acacia quadrimarginea scrub. a1,8Sr k1,2Ci Acacia aneura and Acacia sclerosperma with Atriplex and Maireana spp. succulent steppe.
a1,9Li
woodland. a10,11Si k1,2Ci Acacia victoriae, Acacia xiphophylla and Acacia eremaea with Atriplex and Maireana spp. succulent steppe. a14Si
a1Li Acacia aneura low woodland. a1Li a9,17Si
a1Lp
Acacia aneura, trees in groves or patches. a1Si
Acacia aneura scrub. a33Sc
Acacia rostellifera thicket. a8,9Sr k1,2Ci Acacia sclerosperma, Acacia ramulosa var. ramulosa and Acacia ramulosa var. linophylla with Atriplex and Maireana spp. succulent steppe. a8Sr k1,2Ci Acacia sclerosperma with Atriplex and Maireana spp. succulent steppe. a9,19Si
Acacia ramulosa var. ramulosa, Acacia ramulosa var. linophylla and Acacia acuminata scrub.
a9,20Si Acacia ramulosa var. ramulosa, Acacia ramulosa var. linophylla and Acacia murrayana scrub.
a9Si Acacia ramulosa var. ramulosa and Acacia ramulosa var. linophylla scrub. acSc
Acacia ‐ Casuarina spp. thicket. anSi
Mixed Acacia spp. scrub. ceLr a9Si
e6c5Mr a9,19Si Acacia ramulosa var. ramulosa, Acacia ramulosa var. linophylla and Acacia acuminata scrub with scattered Eucalyptus loxophleba and Casuarina huegeliana. e6,8Mi
e6Mr a19Si Acacia acuminata scrub with scattered Eucalyptus loxophleba. e6Mr eaSi Eucalyptus spp. (mallee) and Acacia spp. scrub with scattered Eucalyptus loxophleba. k1,3Ci
Atriplex spp., Tecticornia spp. and other samphires succulent steppe. k3Ci
Tecticornia spp. and other samphires succulent steppe. mhSc
Melaleuca ‐ Hakea spp. thicket. x2SZc
Scrub heath coastal association. x3SZc
x3SZc/acSc
Note: ‘Beard Code’ column refers to vegetation types mapped by Beard (1976) and Beard & Burns (1976). 3 2 1 4 200000
300000 400000
500000 600000
6700 000
6800 000
6900 000
7000 000
7100 000
7200 000
K 0 30 60 Kilometres 1:1,500,000 Absolute Scale - Legend Proposed Rail Alignment Proposed Project Area
Name: GDA 1994 MGA Zone 50 Projection: Transverse Mercator Datum: GDA 1994 Figure: 2.12 Project ID: 1131 Drawn: AH Date: 10/07/09 Beard Vegetation of the Study Area (Overview) A3 Unique Map ID: A014 x2SZc anSi
e6Mr a19Si x3SZc
k3Ci e6Mr eaSi mhSc e6c5Mr a9,19Si acSc x3SZc/acSc acmSc x4SZc
ceLr a9Si abSi
a9,19m6Sc e6Mr a19Si/c3Sc a9,20Si e6,8Mi
a33Sc a9,19Si
k1,3Ci a14Si
e6Mr a9,19Si e6,22Mr eaSi mSi k3Ci a21Sr
ds a8Sr k1,2Ci e6Mi a23Lc
275000 300000
325000 350000
375000 6825
000 6850
000 6875
000 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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