Semi-evergreen Vine Thicket in the Brigalow Belt South and Nandewar Bioregions - Determination to make a minor amendment to Part 3 of Schedule 1 of the Threatened Species Conservation Act

NSW Scientific Committee

The Scientific Committee, established by the Threatened Species Conservation Act, has made a Determination to make a minor amendment to Part 3 of Schedule 1 (Endangered ecological communities) of the Act by inserting the Semi-evergreen Vine Thicket in the Brigalow Belt South and Nandewar Bioregions (as described in the determination of the Scientific Committee under Division 5 Part 2) and as a consequence to omit reference to the Semi-evergreen Vine Thicket in the Brigalow Belt South and Nandewar Bioregions (as described in the final determination to list the ecological community) which was published on pages 12385 to 12388 in the NSW Government Gazette No. 144 dated 24 December 1999. Minor amendments to the Schedules are provided for by Division 5 of Part 2 of the Act.

 

The Scientific Committee is of the opinion that the amendment is necessary or desirable to correct minor errors or omissions in the Determination in relation to the Thackway and Cresswell (1995) reference.

 

The Scientific Committee has found that:

 

1. The ecological community known as Semi-evergreen Vine Thicket is a form of dry rainforest which in New South Wales is found in the Brigalow Belt South and Nandewar Bioregions. Bioregions are defined in Thackway and Cresswell (1995).

 

2. The Community is made up of vines, deciduous (and/or facultatively deciduous) tree species that have affinities with species from subtropical rainforest. Characteristic canopy dominants are Cassine australis var. angustifolia, Geijera parvifolia and Notelaea microcarpa var. microcarpa, but with emergents typical of the surrounding woodlands (Eucalyptus albens, Eucalyptus melanophloia and Callitris glaucophylla).

 

Other characteristic species include:

Alectryon subdentatus

Dodonaea viscosa var. angustifolia

Alstonia constricta

Indigofera brevidens

Aristida ramosa

Pandorea pandorana

Beyeria viscosa

Parsonsia eucalyptophylla

Boerhavia dominii

Phyllanthus subcrenulatus

Canthium oleifolium

Pimelea neo-anglica

Carissa ovata

Spartothamnella juncea

Cheilanthes sieberi ssp. sieberi

Thellungia advena

Dichondra repens

 

Rare species in New South Wales found in Semi-evergreen Vine Thicket include:

Acacia harpophylla

Planchonella cotinifolia var. pubescens

Isotropis foliosa

Triodia scariosa ssp. scariosa

 

A detailed account of the community is provided by Benson, J.S., Dick, R. and Zubovic, A. 1996 Semi-evergreen vine thicket vegetation at Derra Derra Ridge, Bingara, New South Wales Cunninghamia Vol. 4(3): 497 - 510.

 

3. Semi-evergreen Vine Thicket is found on sites on deep loamy, high nutrient soils derived from basalt or other volcanic rocks, which are relatively less fire prone than surrounding areas, with average annual rainfall of 750mm.

 

The distribution of Semi-evergreen Vine Thicket is a reflection of fire history, soil nutrient status and climate. Before European settlement Semi-evergreen Vine Thicket would have had a relatively restricted distribution in New South Wales.

 

4. Since European settlement substantial areas of Semi-evergreen Vine Thicket have been cleared for grazing and cropping. Clearing has continued in recent years. Benson et al (1996) suggest that grazing in remaining stands may adversely affect regeneration of the community.

 

5. Semi-evergreen Vine Thicket in New South Wales is now very limited in total area and number of stands. One stand occurs at Planchonella Hill Nature Reserve.

 

6. In view of 3, 4, and 5 above the Scientific Committee is of the opinion that Semi-evergreen Vine Thicket 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.

 

 

Dr Richard Major

Chairperson

Scientific Committee

 

Proposed Gazettal date: 02/12/11

Exhibition period: 02/12/11 – 03/02/12

 

Reference:

 

Thackway R, Cresswell ID (1995) An interim biogeographic regionalisation for Australia: a framework for setting priorities in the National Reserves System Cooperative Program. (Version 4.0. Australian Nature Conservation Agency: Canberra.)

Page last updated: 02 December 2011