| Microcystis aeruginosa: source of toxic microcystins in drinking water PJ Oberholster, AM Botha, JU Grobbelaar African Journal of Biotechnology 3 (3), 2004 | 205 | 2004 |
| State of the nation report: An overview of the current status of water quality and eutrophication in South African rivers and reservoirs PJ Oberholster, PJ Ashton Parliamentary Grant Deliverable. Pretoria: Council for Scientific and …, 2008 | 155 | 2008 |
| An overview of cyanobacterial bloom occurrences and research in Africa over the last decade LL Ndlela, PJ Oberholster, JH Van Wyk, PH Cheng Harmful Algae 60, 11-26, 2016 | 143 | 2016 |
| Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa PJ Oberholster, JG Myburgh, PJ Ashton, AM Botha Ecotoxicology and environmental safety 73 (3), 326-335, 2010 | 116 | 2010 |
| Bioaccumulation of aluminium and iron in the food chain of Lake Loskop, South Africa PJ Oberholster, JG Myburgh, PJ Ashton, JJ Coetzee, AM Botha Ecotoxicology and Environmental Safety 75, 134-141, 2012 | 108 | 2012 |
| Biological and chemical evaluation of sewage water pollution in the Rietvlei nature reserve wetland area, South Africa PJ Oberholster, AM Botha, TE Cloete Environmental Pollution 156 (1), 184-192, 2008 | 104 | 2008 |
| Identification of toxigenic Microcystis strains after incidents of wild animal mortalities in the Kruger National Park, South Africa PJ Oberholster, JG Myburgh, D Govender, R Bengis, AM Botha Ecotoxicology and Environmental Safety 72 (4), 1177-1182, 2009 | 99 | 2009 |
| Toxic cyanobacterial blooms in a shallow, artificially mixed urban lake in Colorado, USA PJ Oberholster, AM Botha, TE Cloete Lakes & Reservoirs: Research & Management 11 (2), 111-123, 2006 | 89 | 2006 |
| The effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805) N Musee, PJ Oberholster, L Sikhwivhilu, AM Botha Chemosphere 81 (10), 1196-1203, 2010 | 88 | 2010 |
| Health risk implications from simultaneous exposure to multiple environmental contaminants B Genthe, WJ Le Roux, K Schachtschneider, PJ Oberholster, ... Ecotoxicology and environmental safety 93, 171-179, 2013 | 70 | 2013 |
| Value stream mapping as a supporting management tool to identify the flow of industrial waste: A case study Y Schoeman, P Oberholster, V Somerset Sustainability 13 (1), 91, 2020 | 62 | 2020 |
| The influence of a toxic cyanobacterial bloom and water hydrology on algal populations and macroinvertebrate abundance in the upper littoral zone of Lake Krugersdrift, South Africa PJ Oberholster, AM Botha, PJ Ashton Ecotoxicology 18, 34-46, 2009 | 60 | 2009 |
| An overview of toxic freshwater cyanobacteria in South Africa with special reference to risk, impact and detection by molecular marker tools PJ Oberholster, AM Botha, TE Cloete Biokemistri 17 (2), 57-71, 2005 | 50 | 2005 |
| Chemical characteristics and limnology of Loskop Dam on the Olifants River (South Africa), in light of recent fish and crocodile mortalities J Dabrowski, PJ Oberholster, JM Dabrowski, J Le Brasseur, J Gieskes Water SA 39 (5), 675-686, 2013 | 48 | 2013 |
| Assessment of the effect of nanomaterials on sediment-dwelling invertebrate Chironomus tentans larvae PJ Oberholster, N Musee, AM Botha, PK Chelule, WW Focke, PJ Ashton Ecotoxicology and environmental safety 74 (3), 416-423, 2011 | 41 | 2011 |
| River catchment responses to anthropogenic acidification in relationship with sewage effluent: An ecotoxicology screening application PJ Oberholster, AM Botha, L Hill, WF Strydom Chemosphere 189, 407-417, 2017 | 40 | 2017 |
| Bacteria as biological control agents of freshwater cyanobacteria: is it feasible beyond the laboratory? LL Ndlela, PJ Oberholster, JH Van Wyk, PH Cheng Applied microbiology and biotechnology 102, 9911-9923, 2018 | 39 | 2018 |
| An ecotoxicological screening tool to prioritise acid mine drainage impacted streams for future restoration PJ Oberholster, B Genthe, P Hobbs, PH Cheng, AR De Klerk, AM Botha Environmental Pollution 176, 244-253, 2013 | 38 | 2013 |
| Water quality of Flag Boshielo Dam, Olifants River, South Africa: historical trends and the impact of drought J Dabrowski, PJ Oberholster, JM Dabrowski Water SA 40 (2), 345-358, 2014 | 35 | 2014 |
| Using a battery of bioassays, benthic phytoplankton and the AUSRIVAS method to monitor long-term coal tar contaminated sediment in the Cache la Poudre River, Colorado PJ Oberholster, AM Botha, TE Cloete Water Research 39 (20), 4913-4924, 2005 | 35 | 2005 |
