Cooljarloo west project flora and vegetation assessment
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- 4.2 VEGETATION 4.2.1 Cooljarloo West Project Area
- 4.2.2 Distribution of Communities Recorded Within Tiwest Cooljarloo Leases by Woodman Environmental Between 2005 and 2008
- Table 6: Comparison of Communities Recorded Within the Cooljarloo West Project Area and Falcon Project Area
Species Conservation Significance Drosera closterostigma range extension 50km north
range extension 75km north
range extension 65km north
range extension 100km north
range extension 50km north
range extension 75km north
range extension 150km north
A collection of a Conospermum species previously collected within the Cooljarloo West project area and reported by Woodman Environmental Consulting (2009) as a potential new species is now known to be Conospermum scaposum (P3).
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Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment 4.2 VEGETATION 4.2.1 Cooljarloo West Project Area A total of 22 structural plant communities were described and mapped within the Cooljarloo West project area during studies conducted by Woodman Environmental between 2005 and 2008. A photographic record of the communities recorded is provided in Appendix D.
Forests F1:
Low Forest of Casuarina obesa and Melaleuca spp. over scattered low shrubs on brown sandy loam on lowerslopes and drainage flats
Community F1 is located in the west of the project area on loamy soils adjacent to drainage basins. The overstorey is dominated by Casuarina obesa and Melaleuca rhaphiophylla. Common understorey species included Melaleuca brevifolia and Melaleuca lateriflora subsp. acutifolia over a mixture of herb species. A total of 22 vascular plant taxa were recorded within Community F1.
Woodlands W1:
Low Woodland to Dense Low Forest of Melaleuca rhaphiophylla over Low Sedges on brown sand over clay in basins
This plant community was mapped in isolated pockets throughout the project area within seasonally damp basins and areas fringing open water bodies. The understorey is typically dominated by Lepidosperma longitudinale with emergent shrubs such as Melaleuca teretifolia and Acacia saligna depending on water regimes. A total of 124 vascular plant taxa were recorded within Community W1.
W2:
Low Woodland to Low Forest of Eucalyptus rudis or Corymbia calophylla and Melaleuca spp. over Low Scrub or Scrub on grey or brown sand or clay on lowerslopes, drainage lines and basins
A total of five occurrences of Community W2 are located throughout the project area along small drainage lines and basins. The overstorey is typically dominated by Eucalyptus rudis and Melaleuca rhaphiophylla with scattered shrubs such as Acacia saligna and Xanthorrhoea preissii. A total of 81 vascular plant taxa were recorded within Community W2.
W3:
Low Woodland to Low Forest of Banksia attenuata and Banksia menziesii with occasional Eucalyptus todtiana over Heath dominated by Eremaea pauciflora and/or Hibbertia hypericoides on brown or grey sand on lower to midslopes
Community W3 was the dominant woodland mapped throughout the project area. The Heath understorey is species rich and Melaleuca clavifolia (P1) is commonly seen. In parts the understorey is dominated by Acacia pulchella var. glaberrima or Jacksonia Woodman Environmental Consulting Pty Ltd 23.
Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment nutans reflecting recent fire history (<5yrs) and intensity. A total of 342 vascular plant taxa were recorded within Community W3.
W4: Open Low Woodland of Banksia attenuata, Banksia menziesii and Melaleuca preissiana over Low Heath on brown sand in swales and low rises
This community was recorded in the south of the project within small swale areas. The presence of a number of wet species including Melaleuca preissiana, Beaufortia squarrosa and Phlebocarya ciliata indicates that the water table is close to the surface. This community is comparable to Community W3 - the sandy soils support a species rich heath with similar suites of species. The occurrence of W4 adjacent to Woolka Rd within the Mullering area is situated on the crest of a low rise. Eucalyptus rudis and Melaleuca rhaphiophylla are present at this location and are likely to be associated with an underground mound spring. A total of 131 vascular plant taxa were recorded within Community W4.
W5: Low Woodland to Low Forest of Banksia prionotes over Low Scrub or Heath dominated by Acacia spathulifolia on brown over yellow sand on low rises
Community W5 was recorded in the south west of the project area adjacent to drainage areas. The overstorey is dominated by Banksia prionotes with occasional Banksia attenuata and Banksia menziesii. Common understorey species included Acacia spathulifolia, Melaleuca systena and Allocasuarina lehmanniana subsp. lehmanniana reflecting the coastal position of Community W5 within the project area. A total of 123 vascular plant taxa were recorded within Community W5.
W6: Low Woodland to Low Forest of Banksia prionotes and Banksia attenuata over Heath on yellow sand on upperslopes
Community W6 was recorded in the east of the project area on low rises with deep yellow sands. The understorey is quite variable in composition and notable species include Allocasuarina humilis, Hibbertia hypericoides and Leptospermum erubescens. A total of 60 vascular plant taxa were recorded within Community W5.
W7: Open Low Woodland of Banksia ilicifolia, Banksia menziesii and Banksia attenuata over Heath on brown sand on lowerslopes
Community W7 was recorded in the south of the project area on lowerslopes adjacent to drainage areas. This community may be considered to be an ecotone between Community W3 and the wetter communities recorded within the project area- floristic analysis is required to determine whether this unit is delineated from Community W3. The occurrences to the south-east of the project area could be mapped using field observations and aerial interpretation. However, it is likely that this community is more extensive within the project area than reported, forming mosaics between wet and dry communities. Wet indicator species recorded within Community W7 include Banksia
plant taxa were recorded within Community W7.
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Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment W8: Woodland dominated by
Eucalyptus decipiens subsp. decipiens over mixed shrubs and herbs on grey sand on lowerslopes
A total of 3 small occurrences of Community W8 were mapped in the south of the project area within swale areas and lowerslopes adjacent to basins. The overstorey is dominated by Eucalyptus decipiens subsp. decipiens with occasional Banksia prionotes and Banksia attenuata. The understorey is dominated by Austrostipa compressa reflecting the recent fire history of this community at the time of survey (< 1yr). A total of 38 vascular plant taxa were recorded within Community W8.
Thickets T1:
Scrub to Thicket dominated by Melaleuca lateriflora subsp. acutifolia on brown or grey clay or loamy clay in basins
Community T1 was recorded in the central portions of the project area on loams and clays in small basins. Common overstorey species included Melaleuca viminea subsp. viminea, Grevillea thelemanniana subsp. Coojarloo (B.J. Keighery 28 B) (P1) and Melaleuca rhaphiophylla. Emergent rushes and sedges included Gahnia trifida and Chaetanthus aristatus. A number of salt tolerant species (Melaleuca brevifolia, Tecticornia indica subsp. bidens and Samolus repens var. ?paucifolius) were recorded within this community in areas adjacent to samphire salt pans. A total of 72 vascular plant taxa were recorded within Community T1.
T2: Thicket of Allocasuarina lehmanniana subsp. lehmanniana over Open Low Sedges on grey clay in basins
This community was recorded in the west of the project area within coastal basins associated with the Guilderton System. The understorey is dominated by Gahnia trifida and Baumea juncea with emergent Melaleuca rhaphiophylla. Saline areas within the basin feature herb fields of salt tolerant species such as Triglochin mucronata and
recorded within Community T2.
T3:
Scrub to Thicket dominated by Acacia saligna, Viminaria juncea and Melaleuca rhaphiophylla (stunted form) on grey or brown sand over clay on lowerslopes, drainage lines and minor basins
A total of two isolated occurrences of Community T3 were recorded in the east of the project area within small basins. This community is similar to Community W1, however the absence of dominant sedges within the understorey and the emergence of thickets of Acacia saligna and Viminaria juncea indicate that the soils are inundated for a lesser period of time. A total of 59 vascular plant taxa were recorded within Community T3.
T4:
Scrub to Thicket dominated by Melaleuca rhaphiophylla and Melaleuca viminea subsp. viminea on brown or grey sand over clay in basins
Community T4 was recorded predominantly in the southern portion of the project area with isolated occurrences adjacent to the Falcon area in the north. Common species Woodman Environmental Consulting Pty Ltd 25.
Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment included Regelia ciliata, Hakea varia and Goodenia pulchella subsp. Coastal Plain A (M. Hislop 634). A total of 154 vascular plant taxa were recorded within Community T4.
T5: Thicket of
on grey clay in a swamp
Community T5 was recorded within the grey clay soils of Cooljarloo Swamp to the south of the project area. The understorey is dominated by Lepidosperma longitudinale and an unidentified Meeboldina species. A total of 5 vascular plant taxa were recorded within Community T5, represented by only one detailed recording site.
Heaths H1:
Low Scrub to Heath dominated by Melaleuca brevifolia on brown sand over clay in drainage lines and basins
Community H1 was recorded throughout the project area within drainage lines and basins with shallow sands over clay. Common species included Verticordia densiflora, Calothamnus hirsutus, Conostylis aculeata subsp. spinuligera and Grevillea thelemanniana subsp. Coojarloo (B.J. Keighery 28 B) (P1). A total of 81 vascular plant taxa were recorded within Community H1.
H2:
Heath to Thicket of a mix of species including Allocasuarina lehmanniana subsp. lehmanniana, Acacia cyclops, Melaleuca viminea subsp. viminea and Regelia ciliata on brown or grey clay in basins
Community H2 was recorded in the west of the project area within basins associated with the Guilderton System. A number of coastal species were recorded within this community (Leucopogon parviflorus, Acacia cyclops, Acacia rostellifera and Samolus junceus). A total of 28 vascular plant taxa were recorded within Community H2.
H3: Heath to Thicket dominated by Allocasuarina lehmanniana subsp. lehmanniana or Melaleuca systena on yellow or white sand on dunes
Community H3 was recorded in the west and south-west of the project area on sand dunes associated with the Guilderton System. Common species included Anthocercis littorea, Clematis linearifolia, Spyridium globulosum, Leucopogon parviflorus and Schoenus grandiflorus which are typically coastal species or indicators of calcareous soils. A total of 72 vascular plant taxa were recorded within Community H3.
H4:
Heath dominated by a mix of species including Banksia telmatiaea, Regelia ciliata and Melaleuca seriata with occasional Scrub or Open Scrub of Hakea obliqua subsp. parviflora on grey or brown sand on lowerslopes, flats and drainage basins
This community is widespread throughout the project area and features a species rich heath on sandy soils in low lying areas adjacent to larger drainage basins. The emergence of a scrub layer of Hakea obliqua subsp. parviflora is likely to be a Woodman Environmental Consulting Pty Ltd 26.
Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment reflection of fire history. Common species included Beaufortia squarrosa, Xanthorrhoea preissii, Conostylis aculeata subsp. spinuligera and Verticordia densiflora. A total of 308 vascular plant taxa were recorded within Community H4.
H5: Heath dominated by Allocasuarina humilis and Melaleuca seriata with emergent Eucalyptus todtiana and Nuytsia floribunda on brown sand on midslopes
Community H5 is located in the south of the project area on sandy soils with occasional lateritic gravel. Common understorey species included Hibbertia hypericoides, Eremaea pauciflora and Melaleuca clavifolia (P1). A total of 215 vascular plant taxa were recorded within Community H5.
H6: Heath of Allocasuarina microstachya and Banksia armata var. armata on brown silty sand over laterite on low rises
Community H6 was recorded in a number of small pockets in the south of the project area on sandy soils over lateritic gravel. Only one recording site was positioned within this community, with other notable species including Beaufortia eriocephala (P3), Melaleuca seriata and Hakea incrassata. A total of 41 vascular plant taxa were recorded within Community H6.
H7:
Low Heath dominated by Gastrolobium oxylobioides and Hakea spp. on brown sand over laterite on midslopes and low rises.
This community was recorded in the south of the project area on sands over lateritic gravel. Common species included Calothamnus sanguineus, Hibbertia hypericoides, and Hakea incrassata. A total of 89 vascular plant taxa were recorded within Community H7.
Samphire Salt Pans S1:
Samphire salt pans dominated by Tecticornia indica subsp. bidens and/or Sarcocornia ?blackiana on brown or grey clay in basins
Community S1 was predominantly recorded in the west of the project area on saline flats. Emergent shrubs include Melaleuca brevifolia, Melaleuca rhaphiophylla and Melaleuca viminea subsp. viminea. Common species included Calandrinia sp. Kenwick (G.J. Keighery 10905), Frankenia pauciflora, Isotoma scapigera and Lawrencia squamata. A total of 43 vascular plant taxa were recorded within Community S1.
Mosaic Communities Most of the mosiac communities recorded during the surveys were mapped in the south of the project area. As shown on Figure 2, this area of the project is the most complex in terms of vegetation communities and this reflects the variable soil units located within this area. These soil units are a reflection of the position of the project area within the landscape, which predominantly lies within the Bassendean System and is bordered by the Guilderton, Lesueur and Jurien Systems. A number of plant communities were
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Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment within ecotones of these soil complexes and could not be cleanly differentiated out in the field or on the aerial photographic maps at a scale that would allow presentation.
The largest mosiac community was recorded in the west of the project area (W3/W5). This community records the interchange between coastal species associated with recent dunes of the Guilderton System and species associated with the older dunes of the Bassendean System.
An attempt has been made to align the plant communities recorded within the Cooljarloo West project area with previous studies conducted by Woodman Environmental within the Falcon project area (Table 6).
Plant Community Falcon Project Area Floristic Community Type (FCT) F1 -
W1 - W2 -
W3 FCT9a W4 -
W5 - W6 FCT10 W7 FCT9b W8 -
T1 FCT2 T2 -
T3 FCT8 T4 FCT7
T5 - H1 FCT2
H2 - H3 -
H4 FCT1, FCT3, FCT4, FCT5 H5 - H6 -
H7 FCT11 S1 -
- FCT6
The Cooljarloo West project area was structurally mapped using data collected from detailed recording sites. The Falcon area was initially surveyed using similar structural mapping methods, however this data was superseded with statistical based analyses (quadrats) and mapped according to Floristic Community Type (FCT) to support future
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Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment mining. The comparisons made in Table 6 can only be confirmed using statistical based analysis and FCT mapping within the Cooljarloo West project area.
This comparison demonstrates that FCT6 within the Falcon project area is unlikely to occur within the Cooljarloo West project area and may potentially represent a restricted community. FCT6 is located on the border of the Lesueur and Bassendean Systems. Similar communities have not been recorded within the Cooljarloo leases during studies conducted by Western Botanical (2002) or Mattiske Consulting (1996, 1997).
In addition, plant community H4 (Banksia telmatiaea heath) is structurally similar to a number of FCTs recorded within the Falcon project area. Banksia telmatiaea heaths are widespread throughout the Falcon and Cooljarloo West project areas. The species composition of these heath communities is strongly influenced by fire age and intensity and position in the landscape (distance to watertable). The floristics of these communities is not yet fully understood. A wider understanding of the distribution of
statistical based analyses and FCT mapping of the Cooljarloo West project area. It is recommended that these studies be conducted within the Cooljarloo West project area following the exploration drilling phase, should Tiwest proceed with additional studies to support and facilitate future sand mining in this area.
The number of hectares (ha) each plant community recorded within the Cooljarloo West project area was calculated to determine relative distributions and identify communities that may potentially be locally and/or regionally restricted (Table 7). Woodman Environmental Consulting Pty Ltd 29.
Tiwest Pty Ltd Cooljarloo West Project Area Flora and Vegetation Assessment Kataloq: sites -> default -> files -> Referral Documentation files -> Schedule b financial Contributions for Transition in the files -> Guidance note on transferring contributions from one un agency to another for the purpose of programmatic activities Referral Documentation -> Eneabba Mineral Sands Mine ipl north Proposal Referral Documentation -> Appendix A: Definitions of Conservation Status Codes Referral Documentation -> Sheffield Resources Limited Referral Documentation -> Astron Environmental Services Referral Documentation -> Appendix a1: state definition of threatened and priority flora species note Referral Documentation -> Avensthorpe Yüklə 0,67 Mb. Dostları ilə paylaş:
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