Collie South Bio-landscape

Posted on Dec 23, 2014

Collie South bio-landscapeTerrestialBiodiversity

Priority Bio-landscapes were identified across the region in the 2009 Biodiversity Sub-strategy. A 5 km by 5 km grid was placed across the region and those landscapes that had the highest concentrations of biodiversity value within the region were identified. Those landscapes that were identified as having a combination of high rarity for flora/fauna/communities and vegetation associations were classified as Highest Priority bio-landscapes. Those that were identified as having high rarity for flora/fauna/communities but the vegetation associations within them were not rare were classified as Second Priority Bio-landscapes. The full report can be read here: 2009 Biodiversity Sub-Strategy

The Collie South bio-landscape is located to the south east of Collie within the Shire of Collie and within the Leschenault catchment.

The Collie, Muja and Mumballup State Forests are found within this bio-landscape and the Collie River South Branch flows through here. The hydrology of the landscape has been significantly altered and located within the bio-landscape is the man-made ‘Lake Kepwari’ which was a former open-cut coal mine. There are operating coal mines found to the east of the ‘Lake’ and within the bio-landscape which may account for the high numbers of flora and fauna populations identified in the area, due to the survey requirements associated with the activities of the minesite. The identification of this area as a priority bio-landscape is more indicative of the values of the surrounding intact and vegetated landscape, most of which is State Forest.

Within the bio-landscape 4 DRF and 2 priority flora populations have been identified including Sphaerolobium benetectum, Eucalyptus rudis subsp. cratyantha, Pultenaea skinneri and Jacksonia velveta.

There are also 40 endangered and 19 priority fauna populations that have been identified including species such as chuditch, forest red-tailed black cockatoo, baudin’s cockatoo, quenda, western brush wallaby and the rainbow bee-eater.

Collie South bio-landscape and Climate Change

Projected level of risk due to:

Decreasing rainfall

Best case   VeryHighCircle

Worst caseVeryHighCircle


Increasing temperature

Best case   HighCircle

Worst caseHighCircle


  • where Best Case = MIROC5 and Worst case = CanESM2 at 2090 and RCP8.5; see more here
  • Decreasing rainfall = annual rainfall change as % of initial
  • Where Very High = greater than 25% reduction; High = 20-25% reductIon; Moderate = 15-20% (Note: no where in the region is there projected to be less than 15% reduction in rainfall).
  • Increasing temperature = change in maximum summer temperature
  • Where Very High = greater than 4 degree increase (maximum projected being 4.7 degrees within the Region); High = 3-4 degree increase; Moderate = 2.5 – 3 degree increase; Low = 2 – 2.5 degree increase (Note: no where in the region is there projected to be less than a 2 degree increase which although lower than the very high 4 degree increase, will still have significant impacts on the environment).

This analysis is a simplistic way of looking at the potential risk of an asset to projected changes in rainfall and temperature. Assets may respond to climatic changes differently and species may be able to adapt in ways we don’t yet fully understand.

SWCC Strategic Priority

The Collie South bio-landscape is identified as a second priority asset within SWCC’s NRM Strategy under the Terrestrial Biodiversity theme.





  • 2009 Biodiversity Sub-Strategy for the South West Catchments Council Prepared for the South West Catchments Council by Ecosystem Solutions Pty Ltd 2009.

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