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Dr Anne Colville

Image of Anne Colville
Research Associate, School of Life Sciences
Associate Member, Centre for Environmental Sustainability
B.Sc (Hons) (Sydney U), M. Sc. (UTS), M.Sc. (Uni. Melb), PhD (UTS)
+61 2 9514 7841

Journal articles

Mohammed Abdul, J., Colville, A.E., Lim, R.P., Vigneswaran, S. & Kandasamy, J.K. 2012, 'Use of duckweed (Lemna disperma) to assess the phytotoxicity of the products of Fenton oxidation of metsulfuron methyl', Ecotoxicology And Environmental Safety, vol. 83, pp. 89-95.
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Because of pressure on water supplies world-wide, there is increasing interest in methods of remediating contaminated ground waters. However, with some remediation processes, the breakdown products are more toxic than the original contaminant. Organic matter and salinity may also influence degradation efficiency. This study tested the efficiency of Fenton oxidation in degrading the sulfonylurea herbicide metsulfuron methyl (MeS), and tested the reaction products for phytotoxicity with the Lemna (duckweed) bioassay. The efficiency of degradation by Fentonâs reagent (Fe2þ ¼0.09 mM; H2O2¼1.76mM, 4 h) decreased with increasing initial MeS concentration, from 98% with 5 mg/L MeS, to 63% with 70 mg/L MeS. Addition of NaCl (10 mM) and organic matter (humic acid at 0.2 and 2.0 mg C/L as Total Organic Carbon) reduced the efficiency of degradation at low initial MeS concentrations (5 and 10mg/L), but had no effect at high concentrations. The residual Fentonâs reagent after Fentonâs oxidation was toxic to Lemna. After removal of residual iron and H2O2, the measured toxicity to Lemna in the treated samples could be explained by the concentrations of MeS as measured by HPLC/UV detection, so there was no evidence of additional toxicity or amelioration due to the by-products or formulation materials.
Pablo, F., Krassoi, F.R., Jones, P.R.F., Colville, A.E., Hose, G.C. & Lim, R.P. 2008, 'Comparison of the fate and toxicity of chlorpyrifos-Laboratory versus a coastal mesocosm system', Ecotoxicology and Environmental Safety, vol. 71, no. 1, pp. 219-229.
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The widespread use of chlorpyrifos for pest control in urban and rural environments poses a risk of contamination to aquatic environments via runoff, spray drift or spillage. The aim of this study was to assess the fate of chlorpyrifos and its toxicity to common freshwater invertebrates in the laboratory and in stream mesocosms. Chlorpyrifos was rapidly lost from the test systems but the rates of loss varied considerably, such that losses in the mesocosms could not be reliably predicted from the static laboratory studies. This was likely due to the mass transport of chlorpyrifos from the mesocosm via stream flow. Chlorpyrifos was acutely toxic to all invertebrates tested with the cladoceran species (laboratory 48 h LC50 values 0.07-0.10 ?g L-1) being most sensitive. Despite the differences in the dynamics of chlorpyrifos in the laboratory and mesocosm systems, the sensitivities of the mayfly Atalophlebia australis and the cladoceran Simocephalus vetulus were similar in the 2 systems. © 2007 Elsevier Inc. All rights reserved.
Colville, A.E., Jones, P.M., Pablo, F., Krassoi, R., Hose, G.C. & Lim, R.P. 2008, 'Effects of chlorpyrifos on macroinvertebrate communities in coastal stream mesocosms', Ecotoxicology, vol. 17, no. 3, pp. 173-180.
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This study measured the effects of a single pulse of chlorpyrifos at nominal concentrations of 1 and 10 mu g/l on the macroinvertebrate community structure of a coastal stream mesocosm system. Analysis of data using Principal Response Curves (PRC) and Monte Carlo tests showed significant changes in the treated stream mesocosms relative to that of the controls. These changes in the macroinvertebrate assemblages occurred within 6 h, and persisted for at least 124 days after dosing. Significant community-level effects were detected at the lowest concentration on days 2 and 16 post-dosing, giving a no-observed effect concentration (NOECcommunity) of 1.2 mu g/l (measured). The mayflies Atalophlebia sp. and Koorrnonga sp., Chironomidae and Acarina were all sensitive to chlorpyrifos and decreased in abundance in treated mesocosms after dosing. The fauna of these coastal stream mesocosms showed similar sensitivity to chlorpyrifos with that of other reported studies, but there was no evidence of recovery after 124 days.
Colville, A.E. & Lim, R.P. 2003, 'Microscopic structure of the mantle and palps in the freshwater mussels velesunio ambiguus and hyridella depressa (Bivalvia: Hyriidae)', Molluscan Research, vol. 23, no. 1, pp. 1-20.
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There has been increasing interest in freshwater mussels (order Unionoida) in recent years because their numbers are declining in many parts of the world and also because they have potential as monitors of pollution. Most studies have been performed on the families Unionidae and Margaritiferidae from North America and Europe, and comparatively little is known of the Hyriidae from Australasia. The present study describes the microscopic structure of tissues in the mantle and palps of two hyriid mussels, namely Velesunio ambiguus and Hyridella depressa, as viewed by light and electron microscopy. The two mussels show similarities with the unionids and margaritiferids, particularly the presence of extracellular mineralised granules. The mantle and palps of V. ambiguus and H. depressa consist of flaps of tissue bordered on the inner and outer surfaces by simple epithelia. The intervening tissue is dominated by connective tissue containing vesicular cells, muscle, nerves and blood spaces with haemocytes. Orange-yellow extracellular calcified granules are a prominent feature of the interstitial tissues. The abundance of calcified granules in the mantle of H. depressa is greater than that in V. ambiguus and there are differences in the appearance of the apical vesicles in epithelial cells. © Malacological Society of Australasia 2003.