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BREC Releases Preliminary Subregional Ecosystem Trends Report

Lowland vegetation and Murray Darling under greatest threat

Date:27-Feb-02













The Brisbane Regional Environment Council has just completed an anlaysis of the ecosystems status and trends at sub-regional scales. Researchers at BREC used the latest ecosystem trend information from the Qld Herbarium. While the State government recognises ecosystem status at the regional level no status has been assigned at the sub-regional level. Calculating status at the sub-regional level gives better information for those working to conserve local landscapes. The study uses the same classifications of Endangered(<=10% remaining), Of Concern(<=30% remaining) and No Concern at present(>30% remaining) as the Vegetation Management Act. Using 97-99 clearing rates, predicted local extinction dates were also calculated.


The preliminary study showed that

105 Regional Ecosystems across 37 LGAs could be locally extinct by 2020

With 581,000 ha remaining they were being cleared at 113,000ha or 19.5% of their remaining extent between 97-99.

161 Regional Ecosystems across 39 Sub-Bioregions could be locally extinct by 2020

With 673,000 ha remaining they were being cleared at 133,000ha or 19.9% of their remaining extent 1997-99

65 Regional Ecosystems across 20 Major Watersheds could be locally extinct by 2020

With 550,000 ha remaining they were being cleared at 112,000ha or 20.3% of their remaining extent 1997-99

Between 550,000 and 580,000 ha threatened …. all unprotected by the Qld VM Act

These ecosystems had 19.5-20.3% of their remaining subregional extent cleared between 1997 and 1999

The Moonie(9), Condamine-Culgoa(7), Suttor(6), Mackenzie(5), Warrego(4), Dawson(4) & Comet(4) Rivers had the highest numbers of ecosystems facing local extinction.

The clearest picture comes when the subregions within bioregions are examined.

This clearly shows that Of Concern Ecosystems on lowlands, plains and coastal areas are being the hardest hit. The Lowland subregions of the Murray Darling have the highest clearing rates and the most ecosystems facing local extinction.

To get the full data for this preliminary report(1MB Zip file containing 3 Speadsheets) click here


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TABLE ONE

Numbers of Ecosystems threatened with local extinction and total clearing rate

Number of Not Of Concern REs

Number of Of Concern REs

Grand Total

95

66

161

133,898

Subregion Name

MapRef

VMA

Not of Concern

VMA

Of Concern

Grand Total

Clearing 97-99 ha

Southern Downs

11.26

10

6

16

27,882

North Eastern Plains

06.04

7

6

13

4,509

West Balonne Plains

06.01

6

5

11

16,927

Weribone High

11.29

3

7

10

7,007

Claude River Downs

11.15

9

9

1,048

Isaac - Comet Downs

11.11

4

4

8

7,727

Southern Wooded Downs

04.04

6

2

8

7,061

Balonne - Culgoa Fan

11.35

3

4

7

25,183

Nebo - Connors Ranges

11.12

5

2

7

298

Moonie - Barwon Interfluve

11.34

2

4

6

17,223

Dawson River Downs

11.21

3

3

6

1,190

Upper Belyando Floodout

11.08

2

3

5

3,578

Taroom Downs

11.25

2

3

5

1,368

Barakula

11.27

5

5

1,240

Carnarvon

11.24

4

4

1,244

Woorabinda

11.16

1

3

4

222

Southern Drummond Basin

11.13

3

3

3,425

Macintyre - Weir Fan

11.36

1

2

3

2,241

Tara Downs

11.30

2

1

3

411

Southern Coastal Lowlands

12.04

2

1

3

23

Nebine Plains

06.03

1

1

2

308

Callide Creek Downs

11.19

1

1

2

85

Marlborough Plains

11.14

1

1

2

23

Banana - Auburn Ranges

11.22

2

2

11

Great Sandy

12.09

1

1

2

7

Wyarra Hills

11.05

2

2

7

Belyando Downs

11.07

1

1

2,592

Alice Tableland

10.02

1

1

402

Arcadia

11.20

1

1

314

Boomer Range

11.17

1

1

164

Anakie Inlier

11.09

1

1

70

Basalt Downs

11.10

1

1

46

Broken River

09.04

1

1

40

Eastern Darling Downs

11.31

1

1

7

Southeast Hills and Ranges

12.03

1

1

5

Eastern Mulga Plains

06.02

1

1

4

Dulacca Downs

11.28

1

1

3

Burnett - Curtis Hills and Ranges

12.10

1

1

2

Northern Bowen Basin

11.06

1

1

1


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TABLE TWO Local Extinction dates Regional Ecosystems by Subregion

VMA Status

RE Desc

Subregion Name

NOC

OC

Clearing97-99 ha

Local Extinction Date

Acacia aneura +/- Eucalyptus cambageana +/- E. thozetiana +/- Eremophila latrobei tall shrubland on residuals

North Eastern Plains

2007

253

Southern Downs

2006

72

Acacia aneura +/- Eucalyptus populnea +/- E. melanophloia +/- Brachychiton populneus low woodland on sand plains

Southern Downs

2015

27

Southern Wooded Downs

2015

64

Acacia aneura +/- Eucalyptus populnea +/- E. melanophloia +/- Eremophila mitchellii low open woodland on plains

North Eastern Plains

2006

3181

Southern Downs

1999

649

Acacia aneura, Eucalyptus populnea +/- E. melanophloia shrubby low woodland on Quaternary sediments

Southern Downs

2007

1261

Acacia aneura, Eucalyptus populnea, E. melanophloia open forest on undulating lowlands

Moonie - Barwon Interfluve

2000

636

Acacia argyrodendron woodland on Cainozoic clay plains.

Belyando Downs

2011

2592

Acacia cambagei +/- Eucalyptus ochrophloia woodland on alluvium

West Balonne Plains

2014

109

Acacia cambagei low woodland on braided channels or alluvial plains

West Balonne Plains

2001

96

Acacia cambagei low woodland with scattered shrubs such as Eremophila mitchellii and Geijera parviflora on fresh Cretaceous sediments

Southern Downs

2016

72

Acacia cambagei woodland on alluvial plains.

Southern Downs

2003

76

Acacia catenulata or A. shirleyi open forest on Cainozoic coarse-grained sedimentary rocks. Crests and scarps.

North Eastern Plains

2015

3

Acacia harpophylla +/- A. cambagei low woodland on undulating clay plains

Southern Wooded Downs

2004

5029

Acacia harpophylla +/- Eucalyptus cambageana open woodland on clays

Claude River Downs

2004

71

Southern Downs

1999

350

Southern Wooded Downs

2003

40

Acacia harpophylla and/or Casuarina cristata and Eucalyptus thozetiana or E. microcarpa woodland on lower scarp slopes on Cainozoic lateritic duricrust.

Callide Creek Downs

2017

35

Southern Wooded Downs

2002

93

Acacia harpophylla or A. argyrodendron, Terminalia oblongata low open forest on deformed and metamorphosed sediments and interbedded volcanics.

Isaac - Comet Downs

2005

181

Nebo - Connors Ranges

2011

14

Southern Drummond Basin

2018

2484

Upper Belyando Floodout

2014

76

Acacia harpophylla shrubland on Cainozoic fine-grained sedimentary rocks.

Southern Downs

2010

10635

Southern Wooded Downs

2007

1348

Acacia harpophylla tall shrubland with scattered emergent Atalaya hemiglauca +/- Eucalyptus spp. on Cretaceous sediments

North Eastern Plains

2002

485

Acacia harpophylla, Eucalyptus populnea open forest on Cainozoic fine-grained sedimentary rocks.

Dawson River Downs

2008

8

Nebine Plains

2010

280

North Eastern Plains

2015

58

Southern Downs

2018

5965

Taroom Downs

2008

300

Weribone High

2001

917

Acacia spp. woodland on Cainozoic lateritic duricrust. Scarp retreat zone.

Nebine Plains

2009

28

Astrebla lappacea, A. pectinata +/- A. elymoides grassland on alluvium

Southern Wooded Downs

2005

22

Atalaya hemiglauca, Flindersia maculosa, Acacia spp. open woodland with Tripogon loliiformis on alluvial plains.

West Balonne Plains

2012

30

Atriplex sp., Sclerolaena spp., species of Asteraceae and/or short grasses open herbland on alluvial plains

Southern Wooded Downs

2000

312

Callitris glaucophylla woodland on Cainozoic coarse-grained sedimentary rocks.

Taroom Downs

2014

107

Weribone High

2001

212

Callitris glaucophylla, Corymbia spp. and/or Eucalyptus melanophloia woodland on Cainozoic alluvial plains. Deep sands.

Weribone High

2005

190

Casuarina cristata +/- Eucalyptus coolabah open woodland on alluvial plains.

Balonne - Culgoa Fan

2014

5353

Macintyre - Weir Fan

2008

1857

Weribone High

2012

772

Corymbia citriodora-Eucalyptus crebra open forest on sedimentary rocks.

Southern Coastal Lowlands

2016

10

Dichanthium sericeum grassland on Cainozoic igneous rocks. Lowlands.

Isaac - Comet Downs

2007

1024

Dichanthium spp., Astrebla spp. grassland on Cainozoic fine-grained sedimentary rocks.

North Eastern Plains

2019

49

Eleocharis pallens +/- short grasses +/- Eragrostis australasica open herbland on clays, associated with ephemeral lakes, billabongs and permanent waterholes

West Balonne Plains

1999

202

Eucalyptus acmenoides +/- Corymbia citriodora open forest on sedimentary rocks.

Great Sandy

2011

1

Eucalyptus brownii woodland on alluvial plains.

Broken River

2006

40

Eucalyptus camaldulensis and/or E. coolabah woodland to open woodland on channels, levees and floodplains

Claude River Downs

2005

71

Eucalyptus cambageana, Acacia harpophylla woodland on old sedimentary rocks with varying degrees of metamorphism and folding; lowlands.

Southern Drummond Basin

2015

557

Eucalyptus coolabah fringing woodland on alluvial plains.

Northern Bowen Basin

2007

1

Eucalyptus coolabah open woodland on drainage lines/plains

Southern Downs

2010

78

Eucalyptus coolabah woodland on alluvial plains.

Balonne - Culgoa Fan

2003

14687

Nebo - Connors Ranges

2010

24

North Eastern Plains

2015

66

Southern Downs

2020

512

Taroom Downs

2016

321

Weribone High

2011

218

West Balonne Plains

2012

408

Woorabinda

2008

98

Eucalyptus coolabah, Acacia stenophylla low open woodland on alluvium

Eastern Mulga Plains

2012

4

Southern Wooded Downs

2004

153

West Balonne Plains

2003

65

Eucalyptus coolabah, Acacia stenophylla, Muehlenbeckia cunninghamii open woodland - woodland on alluvial plains.

Macintyre - Weir Fan

2012

337

Eucalyptus crebra woodland on Cainozoic coarse-grained sedimentary rocks.

Barakula

2007

1139

Eucalyptus crebra woodland on Cainozoic fine-grained sedimentary rocks. Lowlands.

Banana - Auburn Ranges

2005

5

Nebo - Connors Ranges

2008

85

Eucalyptus crebra woodland on deformed and metamorphosed sediments and interbedded volcanics; undulating plains.

Nebo - Connors Ranges

2004

111

Eucalyptus crebra, Callitris glaucophylla, Angophora leiocarpa, Allocasuarina luehmannii woodland on Cainozoic sand plains/remnant surfaces.

Dawson River Downs

2008

156

Isaac - Comet Downs

2004

2545

Moonie - Barwon Interfluve

2001

544

Eucalyptus crebra, Corymbia spp., with E. moluccana on lower slopes of Cainozoic sand plains/remnant surfaces.

Dawson River Downs

2012

907

Eucalyptus fibrosa open forest on metamorphics and interbedded volcanics.

Southern Coastal Lowlands

2010

11

Eucalyptus intertexta +/- E. populnea +/- Acacia aneura +/- Callitris glaucophylla woodland on Quaternary sediments

West Balonne Plains

2013

8886

Eucalyptus melanophloia +/- E. chloroclada woodland on undulating plains and valleys with sandy soils

Barakula

2002

51

Taroom Downs

2007

74

Eucalyptus melanophloia +/- E. orgadophila woodland on Cainozoic fine-grained sedimentary rocks.

Arcadia

2016

314

Weribone High

2008

390

Eucalyptus melanophloia open woodland to woodland on flat to gently sloping terrain with yellow earth and duplex soils on sandy alluvial fans formed from outwash from sandstone hills

Carnarvon

2002

2

Claude River Downs

2010

31

Eucalyptus melanophloia woodland on alluvial plains.

Dawson River Downs

2006

104

North Eastern Plains

2000

57

Woorabinda

2013

15

Eucalyptus melanophloia woodland on Cainozoic igneous rocks. Hillsides.

Barakula

2013

23

Eucalyptus melanophloia woodland on deformed and metamorphosed sediments and interbedded volcanics.

Callide Creek Downs

2004

50

Dawson River Downs

2013

10

Upper Belyando Floodout

2011

125

Eucalyptus melanophloia woodland on igneous rocks.

Boomer Range

2014

164

Isaac - Comet Downs

2015

177

Eucalyptus melanophloia, Callitris glaucophylla woodland on Cainozoic sand plains/remnant surfaces. Deep red sands.

Balonne - Culgoa Fan

2009

69

Macintyre - Weir Fan

2002

47

Tara Downs

2018

184

Upper Belyando Floodout

2011

1260

West Balonne Plains

2004

519

Eucalyptus moluccana or E. microcarpa open forest on Cainozoic fine-grained sedimentary rocks

Banana - Auburn Ranges

2008

6

Eucalyptus moluccana or E. microcarpa woodland to open forest on margins of alluvial plains.

Eastern Darling Downs

2007

7

Eucalyptus orgadophila woodland on deformed and metamorphosed sediments and interbedded volcanics.

Anakie Inlier

2005

70

Isaac - Comet Downs

2003

2

Upper Belyando Floodout

2003

73

Eucalyptus platyphylla, Corymbia clarksoniana woodland on alluvial plains.

Isaac - Comet Downs

2000

855

Eucalyptus populnea +/- Acacia aneura +/- E. melanophloia woodland on Cainozoic sand plains/remnant surfaces.

Moonie - Barwon Interfluve

2005

14266

Southern Downs

2013

3246

West Balonne Plains

2009

71

Eucalyptus populnea +/- E. melanophloia +/- Callitris glaucophylla +/- Acacia aneura woodland on sand plains

Balonne - Culgoa Fan

2004

93

Eucalyptus populnea +/- Eremophila mitchellii +/- Acacia aneura +/- Callitris glaucophylla woodland on Quaternary sediments

North Eastern Plains

2009

13

Eucalyptus populnea +/- Eremophila mitchellii +/- Acacia aneura +/- E. melanophloia woodland on flat alluvial plains

Southern Downs

2011

34

Eucalyptus populnea and/or Archidendropsis basaltica low open woodland on flat to undulating terrain with sandy clay to clayey alluvial soil

Carnarvon

2007

1

Claude River Downs

2005

145

Eucalyptus populnea and/or E. melanophloia and/or Corymbia clarksoniana on Cainozoic sand plains/remnant surfaces.

Alice Tableland

2016

402

Carnarvon

2000

1229

Eucalyptus populnea open woodland to woodland on undulating terrain with sandy loam to sandy clay soils

Carnarvon

2006

12

Claude River Downs

2003

352

Eucalyptus populnea or E. brownii woodland on deformed and metamorphosed sediments and interbedded volcanics.

Barakula

2015

22

Basalt Downs

2000

46

Wyarra Hills

2019

2

Eucalyptus populnea woodland on alluvial plains. Texture contrast and deep clay soils.

Balonne - Culgoa Fan

2007

1749

Moonie - Barwon Interfluve

2006

656

Taroom Downs

2014

566

Upper Belyando Floodout

2016

2044

Weribone High

2009

889

West Balonne Plains

2009

670

Eucalyptus populnea woodland on eroding edge of Cainozoic clay plains.

Moonie - Barwon Interfluve

2005

676

Weribone High

2003

345

Eucalyptus populnea woodland with shrubby Acacia harpophylla and/or Casuarina cristata on alluvial plains.

Balonne - Culgoa Fan

2013

2426

Dawson River Downs

2005

5

Moonie - Barwon Interfluve

2014

445

Southern Drummond Basin

2010

384

Tara Downs

2011

156

Weribone High

2008

2814

Eucalyptus populnea, Acacia aneura +/- Eremophila mitchellii woodland

North Eastern Plains

2003

17

Eucalyptus populnea, Acacia aneura and/or E. melanophloia woodland on Quaternary sediments

Balonne - Culgoa Fan

2004

806

Eucalyptus populnea, Callitris glaucophylla, Allocasuarina luehmannii shrubby woodland on alluvial plains. Texture contrast soils.

Claude River Downs

2006

95

North Eastern Plains

2000

38

Eucalyptus populnea, Casuarina cristata or Acacia harpophylla +/- Geijera parviflora woodland on clay plains

North Eastern Plains

2015

65

West Balonne Plains

2015

5871

Eucalyptus populnea-Eremophila mitchellii shrubby woodland on Cainozoic fine-grained sedimentary rocks.

Isaac - Comet Downs

2017

279

North Eastern Plains

2008

224

Southern Downs

2017

4753

Weribone High

2005

260

Eucalyptus similis woodland or open woodland on deep red earths

Claude River Downs

2001

10

Eucalyptus tereticornis and/or E. camaldulensis tall woodland on alluvial plains.

Dulacca Downs

2016

3

Eucalyptus thozetiana or E. cambageana, Acacia harpophylla woodland on scarps

Southern Downs

2006

72

Eucalyptus whitei or E. melanophloia +/- E. populnea and bloodwood woodland on loamy yellow earths and texture contrast soils

Claude River Downs

2004

256

Eucalyptus-Corymbia grassy or shrubby woodland on Cainozoic clay plains.

Isaac - Comet Downs

2009

2664

Woorabinda

2000

55

Freshwater wetlands.

Nebo - Connors Ranges

2008

5

Southern Downs

2008

80

Tara Downs

2011

71

Melaleuca leucadendra and M. fluviatilis +/- Eucalyptus camaldulensis woodland to open forest on banks and channels of larger watercourses

Claude River Downs

2003

17

Melaleuca nodosa low open forest on sedimentary rocks.

Southeast Hills and Ranges

2001

5

Samphire forbland on marine clay plains.

Nebo - Connors Ranges

2011

6

Semi-evergreen vine thicket in sheltered habitats on Cainozoic medium to coarse-grained sedimentary rocks.

Marlborough Plains

2002

21

Woorabinda

2000

54

Semi-evergreen vine thicket on Cainozoic igneous rocks. Steep hillsides

Barakula

2017

5

Wyarra Hills

2007

5

Simple notophyll vine forest often with abundant Archontophoenix cunninghamiana ("gully vine forest") on metamorphics and interbedded volcanics

Southern Coastal Lowlands

2002

2

Sporobolus virginicus grassland on marine clay plains.

Nebo - Connors Ranges

2012

53

Swamps with Baumea spp., Juncus spp. and Lepironia articulata.

Burnett - Curtis Hills and Ranges

2000

2

Marlborough Plains

2015

2

Swamps with Cyperus spp., Schoenoplectus spp. and Eleocharis spp.

Great Sandy

2003

6

Grand Total

133898


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