Clint McCullough (MiWER), Luke Neil (Curtin), Mark Lund (MiWER), Jess Sackmann (CWR, UWA), Dr. Anas Ghadouani (CWR, UWA), Dr. Yuri Tsvetnenko (Curtin), Dr. Jim Ranville (DCG-Colorado School of Mines), Prof. Louis Evans (Curtin)
Is liming and enhanced primary production able to reduce ecological toxicity and increase biodiversity of Collie lakes?
Twelve 1,200 L mesocosms at ECU have been filled with a 40 mm layer of lake sediment from the bottom of the fast river-filled Lake Kepwari. This representative sediment layer has then been covered with Lake Kepwari water. Treatments have been allocated in a randomised two-way factorial design to test the effects of liming, phosphorus enrichment and combined liming and phosphorus amendment on different aspects of the AMD water chemistry, ecotoxicity and ecology.
Not limed Limed
No nutrients U U U U U U
Nutrients U U U U U U
Figure: Experimental Design
Photo: Collecting sediment from Lake Kepwari
Photo: The mesocosms back established at ECU
This was a collaborative multidisciplinary project with co-supervised students at Curtin University of Technology and University of Western Australia. The Edith Cowan University team examined water chemistry, sediment and periphyton dynamics, including the effect of liming and enhanced primary production upon dissolved heavy metal and nutrient concentrations, alkalinity and pH. Jess Sackmann examined correlations between phytoplankton community water quality, and Luke Neil examined the effect of different treatments on aquatic ecotoxicity between each other and over time.
Part of L. Neil’s Ph.D. project and J. Sackmann’s Honours Project. Partially funded by Curtin, Edith Cowan, UWA and the Centre for Sustainable Mine Lakes.
Neil, L. L. (2008). Bioassay assessment of mine pit lake water for aquaculture and biodiversity conservation, Ph.D. thesis, Curtin University of Technology, Perth, Australia. 298pp. link
Neil, L.; McCullough, C. D.; Lund, M.A.; Tsvetnenko, Y. & Evans, L. (2009). Bioassay toxicity assessment of mining pit lake water remediated with limestone and phosphorus. Ecotoxicology and Environmental Safety. 72: 2,046-2,057.link (Highlighted article).
Neil, L.; McCullough, C. D.; Tsvetnenko, Y. & Evans, L. (2006). Toxicity assessment of limed and phosphorus amended mine pit lake water. RACI/ASE Interact 2006 conference. Perth, Australia 24-28 September. PDF
Sackmann, J. (2006). The effect of experimental liming and nutrient addition on phytoplankton of an acidic mine lake, B.E. (hons) thesis, University of Western Australia, Perth, Australia. 50pp.