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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4372

Title: Phytobenthos and phytoplankton community changes upon exposure to a sunflower oil spill in a South African protected freshwater wetland
Authors: Oberholster, PJ
Blaise, C
Botha, A-M
Keywords: Chlamydomonas africana
Cyanobacteria
Chlorophyll
Light intensity
Algal bioassay
Issue Date: Aug-2010
Publisher: Springer Verlag (Germany)
Citation: Oberholster, PJ, Blaise, C and Botha, A-M. 2010. Phytobenthos and phytoplankton community changes upon exposure to a sunflower oil spill in a South African protected freshwater wetland. Ecotoxicology, 2010 (Online First), pp 14
Abstract: The occurrence of a sunflower oil spill in 2007 in the Con Joubert Bird Sanctuary freshwater wetland, South Africa, inhibited the growth of sensitive phytoplankton species and promoted that of tolerant species. The algal divisions Chlorophyta and Euglenophyta were well represented in the sunflower oil contaminated water, especially the species Euglena sociabilis, Phacus pleuronectes and Chlamydomonas africana. Young and mature resting zygotes of Chlamydomonas africana were recorded in high abundance at all the sunflower oil contaminated sampling sites. The phytobenthos diversity and abundance were significantly suppressed and negatively associated with low Dissolved Oxygen concentrations and the negative redox potential of the bottom sediment. At the intracellular level, phytoplankton chlorophyll a and b concentrations as physiological variables were more sensitive indicators of the adverse effects of sunflower oil than the 72 h Selenastrum capricornutum algal bioassay conducted.
Description: Copyright: 2010 Springer. This is the author's pre print version. The definitive version is published in the Ecotoxicology Journal (Online First) Copy
URI: http://www.springerlink.com/content/n25u542634564047/fulltext.pdf
http://hdl.handle.net/10204/4372
ISSN: 0963-9292
Appears in Collections:Water resources and human health
General science, engineering & technology

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