欧美福利100000

Research:

My research is focused on the broad scope of ecotoxicology and the assessment of aquatic ecosystems. My research covers various aspects of ecotoxicology with an emphasis on both laboratory and field based assessments.听

Current research projects include:听

• Assessing the effects of global climate change on the thermal tolerances of both limpets and mussels along the south African coastline.
• Assessing the distribution of microplastics in the Nyl River system using the Rapid Habitat Assessment Method (RHAM) to aid in determining where the microplastics are accumulating in a river.
• Assessing the extent and distribution of microplastics in the Jukskei River, Gauteng.
• Assessing the physiological effects of E- waste on听Danio rerio ,听following a semi-static exposure, using the Integrated Biomarker Response (IBRv2).
• A evaluation of the wetlands in the Vhembe District, Limpopo Province, using the WET Health monitoring protocol.

Recent publications:

• C.M. VOLSCHENK, Y. IKENAKA, Y.B. YOHANNES, S.M. NAKAYAMA, M/ ISHIZUKA, E.SMIT, J.H.J. VAN VUREN, R.听GREENFIELD. (2019) Baseline bio-accumulation concentrations and resulting oxidative stress in Synodontis zambizensis after an acute laboratory exposure to 4,4鈥�-DDT. Pesticide Biochemistry and Physiology. (Online 06/02/2019) DOI:听.

• NJ BAKER, R听GREENFIELD听(2019) Shift happens: Changes to the diversity of riverine aquatic macroinvertebrate communities in response to sewage effluent runoff. Ecological Indicators 102: 813-821
• S DAHMS-VERSTER, A NEL, JHJ VAN VUREN, R听GREENFIELD听(2020) Biochemical responses revealed in an amphibian species after exposure to a forgotten contaminant: An integrated biomarker assessment. Environmental Toxicology and Pharmacology volume 73: 103272.听 DOI:听
• H.T.J. DAHMS, G. J. VAN RENSBURG, R.听GREENFIELD. The microplastic profile of an urban African stream. Science of the Total Environment 731: 138893
• L. DE NECKER, T. NESWISWI, R.听GREENFIELD, JHJ. VAN VUREN, L. BRENDONCK, V. WEPENER, N. SMIT (2020) Long-Term Water Quality Patterns of a Flow Regulated Tropical Lowland River. Water 12: 37
• LJ CONNELL, GR JANSEN VAN RENSBURG, A AVENANT-OLDEWAGE, R听GREENFIELD听(2020) Biomarker responses in African sharptooth catfish,听Clarias gariepinus听(Burchell, 1822), as indicators of potential metal and organic pollution along the Vaal River system, South Africa. African Journal of Aquatic Science 45: 317-328
• TJ de Haas, LJ Connell and R听Greenfield*. Investigating the effects of hypersalinity on the cardiac performance of the invasive gastropod听Melanoides tuberculata听(M眉ller, 1774). African Zoology 2021: 1鈥�10
• Greenfield听R., 2022. Chapter 20: Introduction to Wetland Monitoring. In: Dalu T. and Wasserman R.J., 2022: Fundamentals of Tropical Freshwater Wetlands: from ecology to conservation management. Elsevier, Netherlands. Pp 864
• GJ van Rensburg, V, Wepener, S, Horn, R,听Greenfield听(2022) Oxidative stress in the freshwater shrimp听Caridina africana听following exposure to atrazine. Bulletin of Environmental Contamination (in Press).

External links: