Public Environmental Review - Perth–Darwin National Highway … · 2020. 7. 1. · SCP23a Central...

WARBROOK RD

STOCK RD

RAILWAY PDE

NEAVES RD

CUNNINGHAM RD

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Public Environmental ReviewPerth –Darwin National High way

Main Roads WA

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Public En viron men tal ReviewPerth–Darwin Nation al Highway

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Public Environmental ReviewPerth–Darwin National Highway

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September 2015 NLWA‐03‐EN‐RP‐0025 / Rev 4 Page 8‐29

8.2.6 Floristic Community Types

The floristic data collected from the flora study area were compared against the floristic data from Gibson et al. (1994) and the floristic data for the SCP (Keighery et al., 2012) to determine the floristic community type (FCT) representation (Appendix C).

The sites sampled within the flora study area aligned with 20 separate FCTs (Table 8.4). The location of the FCTs across the flora study area and proposal footprint is provided on Figure 8.3. SCP21c was the most represented type across the flora study area with 23 sites, followed by SCP11 with 17 sites and SCP23b with 14 sites.

Table 8.4 Floristic community type determination

FCT Description State listing1

S02 Northern Pericalymma ellipticum dense low shrublands –

S03 Wet sedgelands on sandy clays –

S09 Banksia attenuata woodlands over dense low shrublands –

SCP02 Southern wet shrublands TEC (EN)

SCP04 Melaleuca preissiana damplands –

SCP05 Mixed shrub damplands –

SCP06 Weed dominated wetlands on heavy soils –

SCP11 Wet forests and woodlands –

SCP12 Melaleuca teretifolia and/or Astartea aff. fascicularis shrublands –

SCP13 Deeper wetlands on heavy soils –

SCP14 Deeper wetlands on sandy soils –

SCP17 Melaleuca rhaphiophylla – Gahnia trifida seasonal wetlands –

SCP20a Banksia attenuata woodlands over species rich dense shrublands TEC (EN)

SCP21a Central Banksia attenuata – Eucalyptus marginata woodlands –

SCP21c Low lying Banksia attenuata woodlands or shrublands PEC (3)

SCP22 Banksia ilicifolia woodlands PEC (2)

SCP23a Central Banksia attenuata – Banksia menziesii woodlands –

SCP23b Northern Banksia attenuata – Banksia menziesii woodlands PEC (3)

SCP24 Northern Spearwood shrublands and woodlands PEC (3)

SCP28 Spearwood Banksia attenuata or Banksia attenuata – Eucalyptus woodlands –

1. State listing definitions: TEC (EN): Endangered Threatened Ecological Community. PEC (2): Priority 2 Priority Ecological Community. PEC (3): Priority 3 Priority Ecological Community.

D ate:

M XD :

Fi le N a m e :

GNANGARA RD

BEECHBORO RD NORTH

PARK ST

MARSHALL RD

REID HWY

REID HWY

HEPBURN AV

TONKIN HWY

39 5 ,0 0 0

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F ig u re N o :

LEGENDFloristic commu nitytypes

SC P 02 or SC P 11SC P 04 or S0 2SC P 04SC P 06SC P 11SC P 12SC P 13SC P 20aSC P 21aSC P 21cSC P 23aSC P 23bSC P 24S0 2 or S C P0 4S0 3Propo sa l foo tp rin tD eve lo pm en t e nve lop e

So urce & N o te s :Floris tic co m m u nity type s fr om C o ffe y (Ja nu a ry 2 0 15 ).Ae ria l im a g ery fro m L a nd g ate (Au g us t 20 1 4 ).

8.3AFloristic commu nity typesMap 1 of 4

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Reid Highway

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Pu blic Environmental ReviewPerth–Darwin National Highway

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D ate:

M XD :

Fi le N a m e :

DRUMPELLIER DR

THE PROMENADE

MARALLA RD

WARBROOK RD

THE BROADWAY

HALDEN RD

39 9 ,0 0 0

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F ig u re N o :

LEGENDFloristic communityty pes

SC P 11SC P 12SC P 13SC P 14SC P 21aSC P 21c or S 09SC P 21cSC P 22SC P 23aSC P 23bSC P 24SC P 28SC P 05SC P 06S0 2S0 3Propo sa l foo tp rin tD eve lo pm en t e nve lop e

So urce & N o te s :Floris tic co m m u nity type s fr om C o ffe y (Ja nu a ry 2 0 15 ).Ae ria l im a g ery fro m L a nd g ate (Au g us t 20 1 4 ).

8.3BFloristic community ty pesMap 2 of 4

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D ate:

M XD :

Fi le N a m e :

STOCK RD

RAILWAY PDE

NEAVES RD

MUCHEA SOUTH RD

CUNNINGHAM RDCUNNINGHAM RD

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F ig u re N o :

LEGENDFloristic communitytypes

SC P 11S0 2Propo sa l foo tp rin tD eve lo pm en t e nve lop eC om m o nw ea lth lan d So urce & N o te s :

Floris tic co m m u nity type s fr om C o ffe y (Ja nu a ry 2 0 15 ).Ae ria l im a g ery fro m L a nd g ate (Au g us t 20 1 4 ).

8.3CFloristic community typesMap 3 of 4

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M XD :

Fi le N a m e :

BRAND HWY

GREAT NORTHERN HWY

MUCHEA SOUTH RD

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F ig u re N o :

LEGENDFloristic communitytypes

SC P 11SC P 17 or SC P 11SC P 28Propo sa l foo tp rin tD eve lo pm en t e nve lop e So urce & N o te s :

Floris tic co m m u nity type s fr om C o ffe y (Ja nu a ry 2 0 15 ).Ae ria l im a g ery fro m L a nd g ate (Au g us t 20 1 4 ).

8.3DFloristic community typesMap 4 of 4

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8.2.7 Threatened and Priority Ecological Communities

An ecological community is a naturally occurring group of plants, animals and other organisms interacting in a unique habitat. The complex range of interactions between the component species provides an important level of biological diversity in addition to genetics and species.

A desktop review of DPAW’s Threatened Ecological Communities (TECs) and Priority Ecological Communities (PECs) database (DPAW, 2015) and DOTE protected matters search tool for TECs (DOTE, 2014c) identified nine State listed TECs, five State listed PECs, and seven Commonwealth listed TECs as potentially occurring within the flora study area (Figure 8.4). The search parameters used for each search (DPAW and DOTE) are provided in Appendix C.

In addition to the known PECs and TECs, the survey and statistical analysis (Coffey, 2015a) recorded one State and Commonwealth listed TEC (Claypans of the SCP ‐ Claypans with mid dense shrublands of Melaleuca lateritia over herbs or Casuarina obesa association) and one State PEC (Banksia dominated woodlands on the Swan Coastal Plain) from the flora study area (see Figure 8.4). The State (Critically Endangered) and Commonwealth (Endangered) listed TEC, Mound Springs SCP, occurs within the flora study area, and outside of the development envelope.

The location of the Commonwealth TEC, Claypans of the SCP, may represent either the Priority 1 PEC Claypans with mid dense shrublands of Melaleuca lateritia over herbs or the Priority 1 PEC Casuarina obesa association. For the purposes of this assessment, this community is considered as the Commonwealth TEC, Claypans of the SCP. One site sampled within the flora study area was considered to correspond with either FCT SCP11 or SCP17. However, based on the vegetation present and the location, this may be a misclassification due to the presence of introduced taxa (Appendix C).

The presence of Casuarina obesa in the upper storey may suggest the site is better placed within the Priority 1 PEC Casuarina obesa association. Alternatively, the presence of clay based soils and Melaleuca lateritia may also indicate that the site closely resembles the Priority 1 PEC Claypans with mid dense shrublands of Melaleuca lateritia over herbs. This PEC is also classified as Claypans of the Swan Coastal Plain under the EPBC Act and is ranked as Critically Endangered. The PEC occurs on claypans (predominantly basins) usually dominated by a shrubland of Melaleuca lateritia and can occur on both the coastal plain and the adjacent plateau. The claypans are characterised by aquatic (Hydrocotyle lemnoides – P4) and amphibious taxa (e.g. Glossostigma diandrum, Villarsia capitata and Eleocharis keigheryi – T).

The State TEC SCP02 was identified based on the multivariate statistical analysis. The sample site was considered to match both SCP02 and SCP11. Given the location, soil type and species representation it is unlikely to be the TEC SCP02. Further survey work is required to confirm if the site is consistent with SCP02. MRWA is committed to completing additional surveys in spring 2015, including the establishment of new quadrats and the sampling of existing quadrats, to determine the FCT. The survey design and timing will be determined in consultation with the Species and Communities Branch of DPAW. It is anticipated that further analysis on the potential TEC will be available in spring 2015. Survey results will be provided to the EPA as part of the response to submissions process to inform the EPA’s assessment of the proposal.

The ‘Banksia dominated woodlands on the Swan Coastal Plain’ is listed as a Priority 3 PEC. Based on the description, the relevant vegetation associations dominated by Banksia attenuata and Banksia menziesii on the SCP represent this PEC. Banksia dominated woodlands on the Swan Coastal Plain is also represented by TEC SCP20a and PECs SCP21c, SCP22, SCP23b and SCP24.

The TECs and PECs known to occur within and adjacent to the flora study area and those recorded are described in Table 8.5.


Table 8.5 TECs and PECs occurring near or within the flora study area

Community name Community description State conservation status

Commonwealth conservation status

Vegetation association occurrence

Indicative extent within the flora study area (ha)

Claypans of the SCP Claypans of the SCP. (TECs and PECs under numerous communities with clay soils)

Critically Endangered Co and Mp10 9.77

SCP07 Herb rich saline shrublands in clay pans. Vulnerable Critically Endangered – –

Mound Springs SCP Communities of Organic Mound Springs, SCP TEC. Critically Endangered Endangered Mp1 1.49

Muchea Limestone Shrublands and woodlands on Muchea Limestone of the SCP.

Critically Endangered Endangered – –

SCP20c Shrublands and woodlands of the eastern side ofthe SCP.


SCP3a Corymbia calophylla – Kingia australis woodlands on heavy soils, SCP.


SCP3c Corymbia calophylla – Xanthorrhoea preissiiwoodlands and shrublands, SCP.


Coastal Saltmarsh Subtropical and Temperate Coastal Saltmarsh. Priority 1 Vulnerable – –

SCP20a Banksia attenuata woodland over species rich dense shrublands.

Endangered – BaBm2 and Et1 12.31

SCP20b Banksia attenuata and/or Eucalyptus marginatawoodlands of the eastern side of the SCP.

Endangered – – –

SCP3b Corymbia calophylla – Eucalyptus marginatawoodlands on sandy clay soils of the southern SCP.

Vulnerable – – –

SCP22 Banksia ilicifolia woodlands. Priority 2 – Mp2 3.37


Community name Community description State conservation status

Commonwealth conservation status

Vegetation association occurrence

Indicative extent within the flora study area (ha)

SCP21c Low lying Banksia attenuata woodlands or shrublands.

Priority 3 – Ba, BaBm1, BaBm2, BaBm3, BaBmMp, Cc7, CcEm1, CcEm2, CcMp, Cc/Mp, Em1, Ep, Et2 and Pr

177.95

SCP23b Swan Coastal Plain Banksia attenuata – Banksia menziesii woodlands.

Priority 3 – BaBm1, BaBm2, BaBm3, CcEm2, Et1 and Et2

57.50

Central Granite Shrublands (Com 5, Markey)

Central Northern Darling Scarp Granite Shrubland Community.

Priority 4 – – –

SCP02 Southern Wet Shrublands – Endangered Mp3 1.36

SCP24 Northern Spearwood shrublands and woodlands Priority 3 – BaBm3 and Em1 8.09

Banksia dominated woodlands on the Swan Coastal Plain

Banksia attenuata and/or Banksia menziesiiwoodlands on deep sands on the SCP.

Priority 3 – Ba, BaBm1, BaBm2, BaBm3, BaBmMp, Cc3, Cc6, Cc7, CcEm1, CcEm2, Em1, Et1, Et2 and Et3

488.10

Source: Coffey (2015a) (Appendix C).

D ate:

M XD :

Fi le N a m e :

GNANGARA RD

BEECHBORO RD NORTH

PARK ST

MARSHALL RD

REID HWY

REID HWY

HEPBURN AV

TONKIN HWY

39 5 ,0 0 0

39 5 ,0 0 0

39 6 ,0 0 0

39 6 ,0 0 0

39 7 ,0 0 0

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F ig u re N o :

So urce & N o te sTh re aten e d an d Pr io ri ty Eco lo g ica l C om m u n it ie s fro m C of fe y (F eb ru a ry 2 01 5 ).Th re aten e d an d Pr io ri ty Eco lo g ica l C om m u n it ie s fro m D PA W (2 01 3 a nd 2 0 14 ).Ae ria l im a g ery fro m L a nd g ate (Au g us t 20 1 4 ).

8.4AThreaten ed an d PriorityEc ologic al Com m un ities

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Main Roads WA

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8.4BThre ate ne d and Prio rityEco lo gical Co mmu nitie s

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8.4CThreaten ed an d Prio rityEco lo gical Co mmu n ities

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Main Ro ad s WA

LEGENDP ro p o s a l fo o tp r in tD e v e lo p m e n t e n v e lo p eC o m m o n w e a lth la n d

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8.4DThreatened and PriorityEcolog ical Communities

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Main Roads WA


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8.2.8 Vegetation Supporting Significant Flora

The vegetation associations that support habitat for conservation significant flora (Threatened and Priority listed) recorded from the study area that are considered to be locally significant for the continual survival of those significant flora are listed in Table 8.6.

Table 8.6 Locally significant vegetation associations supporting threatened and priority taxa

Vegetation association Threatened and priority taxa present

AsMlEvCl Meeboldina decipiens subsp. decipiens ms

BaBm1 Poranthera moorokatta

BaBm2 Anigozanthos humilis subsp. chrysanthus, Hypolaena robusta and Millotia tenuifolia var. laevis

Bl Poranthera moorokatta

Cc/Mp Millotia tenuifolia var. laevis and Poranthera moorokatta

CcEm2 Millotia tenuifolia var. laevis

CcMpMr Grevillea curviloba subsp. Incurva

Em2 Stylidium striatum

Er3 Poranthera moorokatta

Er6 Ornduffia submersa

Et2 Anigozanthos humilis subsp. chrysanthus, Caladenia huegelii, Hypolaena robusta and Poranthera moorokatta

Mp1 Cyathochaeta teretifolia

Mp6 Cyathochaeta teretifolia

Source: Coffey (2015a).

8.2.9 Fragmentation and Ecological Corridors

The flora study area is located within the Perth IBRA subregion, which has historically been cleared for urban and industrial development and silviculture/agriculture. The historical clearing has resulted in only 42% (or 473,176 ha) of the pre‐European extent of native vegetation within the Perth IBRA subregion (1,117,757 ha) remaining intact (DPAW, 2013b). This historical clearing has placed greater emphasis on the importance of the remaining intact native vegetation and ensuring linkages are maintained to allow ecological movement, including fauna and genetic material.

A Regional Ecological Linkage Network plan produced aims to link protected regionally significant natural areas by retaining the best condition local natural areas available so they can act as linkage corridors for flora and fauna to move between regionally significant areas (WALGA, 2004). The flora study area is located across several of these key ecological linkages (Figure 8.5). Ecological linkage corridors occur at the following locations (from north to south):

Gaston Road, Bullsbrook. This linkage corridor incorporates the known TEC Mounds Spring SCP and connects Bush Forever Site 97 in the west with Bush Forever Site 292 in the east.

Raphael Road, Bullsbrook near the proposed Cooper Road separation. This corridor links Bush Forever Sites 6 and 399 in the west with Ellen Brook, which provides a north‒south ecological corridor.


Maralla Road Nature Reserve. This linkage corridor connects the State Forest (F 65) with Ellen Brook and represents a pinch point between the State Forest in the west and native vegetation on the eastern SCP and the Darling Scarp.

Rocla mining lease area. A north‒south ecological linkage corridor is located at the proposed Promenade grade separation in Ellenbrook. The corridor links the State Forest in the north with Whiteman Park in the south.

Cullacabardee. The east‒west corridor links Lake Jandabup and Gnangara Lake in the northwest with Whiteman Park in the east.

Reid Highway. The east‒west linkage corridor connects vegetation from the coastline east towards Bennett Brook at the southern end of Whiteman Park.

MARSHALL RD

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Source and Notes:Draft regional ecological linkages from Perth Biodiversity Project. Bush Forever sites from DOP (January 2015).Conservation areas from DPAW (January 2015).Roads from MRWA (2014).Aerial imagery from ArcGIS Online.

8.5ADraft ecological lin kage n etw orksMap 1 of 24483AA_03_F08.5A_GIS

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Source and Notes:Draft regional ecological linkages from Perth Biodiversity Project. Bush Forever sites from DOP (January 2015).Conservation areas from DPAW (January 2015).Roads from MRWA (2014).Aerial imagery from ArcGIS Online.

8.5BDraft ecological lin kage n etw orksMap 2 of 24483AA_03_F08.5B_GIS

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