Agnes Banks woodland in the Sydney Basin Bioregion - endangered ecological community listing

NSW Scientific Committee - final determination



The Scientific Committee, established by the Threatened Species Conservation Act, has made a Final Determination to list theAgnes Banks Woodland in the Sydney Basin Bioregion as an ENDANGERED ECOLOGICAL COMMUNITY on Part 3 of Schedule 1 of the Act. Listing of Endangered Ecological Communities is provided for by Part 2 of the Act.

The Scientific Committee has found that:

1. TheAgnes Banks Woodland is the name given to the plant community from the local government area of Penrith (within the Sydney Basin

Bioregion) that is characterised by the following assemblage of species:

  • Acacia bynoeana
  • Amperea xiphoclada
  • Angophora bakeri
  • Baeckea diosmifolia
  • Baloskion (prev. Restio) pallens
  • Banksia aemula
  • Banksia oblongifolia
  • Banksia serrata
  • Bossiaea rhombifolia
  • Brachyloma daphnoides
  • Caleana major
  • Callistemon citrinus
  • Callistemon linearis
  • Cassytha glabella
  • Cheilanthes sieberi
  • Conospermum taxifolium
  • Cyathochaeta diandra
  • Dianella revoluta
  • Dichondra repens
  • Dillwynia glaberrima
  • Dillwynia sericea
  • Dillwynia tenuifolia
  • Entolasia stricta
  • Eucalyptus parramattensis
  • Eucalyptus sclerophylla
  • Haemodorum corymbosum
  • Hibbertia fascicularis
  • Imperata cylindrica
  • Isopogon anemonifolius
  • Kunzea capitata
  • Lepidosperma laterale
  • Lepidosperma longitudinale
  • Lepidosperma urophorum
  • Leptocarpus tenax
  • Leptospermum polygalifolium
  • Leptospermum trinervium
  • Lepyrodia scariosa
  • Lomandra glauca
  • Lomandra multiflora
  • Melaleuca thymifolia
  • Microlaena stipoides
  • Mitrasacme polymorpha
  • Monotoca scoparia,
  • Olax stricta
  • Persoonia nutans
  • Philotheca (prev. Eriostemon) myoporoides
  • Philotheca salsolifolia
  • Pimelea linifolia
  • Platysace ericoides
  • Pteridium esculentum
  • Ricinocarpos pinifolius
  • Schoenus imberbis
  • Stylidium graminifolium
  • Thelymitra aristata
  • Themeda australis
  • Trachymene incisa
  • Xanthorrhoea minor
  • Xyris complanata
2. The total species list of the community is considerably larger than that given in 1 (above), with many species present in only one or two sites or in very small quantity. In any particular site not all of the assemblage listed in 1 may be present. At any one time, seeds of some species may only be present in the soil seed bank with no above-ground individuals present. The species composition of the site will be influenced by the size of the site and by its recent disturbance history. The number of species and the above-ground composition of species will change with time since fire, and may also change in response to changes in fire frequency. A more complete plant species list is in James McDougall & Benson (1999)

3.Agnes Banks Woodland has been recorded from the local government area of Penrith (within the Sydney Basin Bioregion).

4.Agnes Banks Woodland is a low woodland dominated by Eucalyptus sclerophylla and Angophora bakeri with a diverse understorey of sclerophyllous shrubs species including Banksia oblongifolia, Conospermum taxifolium, Leptospermum trinervium, Dillwynia sericea, Monotoca scoparia and Persoonia nutans, and ground stratum species including Lepidosperma urophorum, Platysace ericiodes, Pimelea linifolia, Mitrasacme polymorpha, Trachymene incisa and Stylidium graminifolium.

5.Agnes Banks Woodland is restricted to small areas of sand dunes overlying Tertiary Alluvium at Agnes Banks on the east bank of the Hawkesbury River. In low-lying, poorly drained areas it grades into Castlereagh Ironbark Forest. On higher ground where the aeolian sand deposits overly sandy alluvial soils the transition is to Castlereagh Scribbly Gum Woodland to which it is floristically related.

6. The vegetation ofAgnes Banks Woodland is described in Benson (1992), James (1997) and National Parks and Wildlife Service Threatened Species Unit (2000).

7. Significant plant species forAgnes Banks Woodland include Dillwynia tenuifolia, Persoonia nutans, Acacia bynoeana, Banksia aemula, Lepidosperma longitudinale, Dillwynia glaberrima, Xyris complanata, Thelymitra aristata and Baloskion pallens (James 1997).

8.Agnes Banks Woodland has been extensively cleared for sand extraction and the community has limited representation in Agnes Banks Nature Reserve. It originally extended over about 2000 ha of which about 80 ha or 4% still survived in 1997 (NPWS Threatened Species Unit 2000). Remnants are threatened with further sand extraction and clearing for rural and rural residential development, as well as other indirect threats associated with proximity to rural, rural residential and sand extraction areas.

9. In view of the small size of existing remnants, and the threat of further clearing and disturbance, the Scientific Committee is of the opinion that Agnes Banks Woodland in the Sydney Basin Bioregion is likely to become extinct in nature in New South Wales unless the circumstances and factors threatening its survival or evolutionary development cease to operate and that listing as an endangered ecological community is warranted.

References

Benson, D.H. (1992) The natural vegetation of the Penrith 1:100 000 map sheet. Cunninghamia 2(4): 541-596.

James, T. (1997) Native flora in Western Sydney: Urban Bushland Biodiversity Survey (NSW National Parks & Wildlife Service).

James, T., McDougall, L. & Benson, D. (1999) Rare Bushland plants of Western Sydney. (Royal Botanic Gardens Sydney).

NPWS Threatened Species Unit (2000) Interpretation guidelines for the native vegetation maps of the Cumberland Plain, Western Sydney. (NSW National Parks & Wildlife Service).

Proposed Gazettal date: 3/11/00

Exhibition period: 3/11/00 - 8/12/00


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Page last updated: 27 February 2011