dc.contributor.author |
Oberholster, Paul J
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dc.contributor.author |
Myburgh, JG
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dc.contributor.author |
Ashton, PJ
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dc.contributor.author |
Botha, AM
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dc.date.accessioned |
2009-09-14T08:44:45Z |
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dc.date.available |
2009-09-14T08:44:45Z |
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dc.date.issued |
2009 |
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dc.identifier.citation |
Oberholster, P.J. et al. 2009. Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa. Ecotoxicology and Environmental Safety (2009), pp 10 |
en |
dc.identifier.issn |
0147-6513 |
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dc.identifier.uri |
http://hdl.handle.net/10204/3586
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dc.description |
Copyright: 2009 Published by Elsevier Inc. |
en |
dc.description.abstract |
The relationships between water quality and the phytoplankton community within Lake Loskop were studied during the late summer and autumn of 2008 to evaluate the impacts of acid mine drainage and high nutrient concentrations. The higher concentrations of metal ions and sulphate had adverse effects on certain phytoplankton species in the inflowing riverine zone of Lake Loskop, in comparison to the reference site in the lacustrine zone of the lake, which was dominated by the larger and slower growing late summer species of Coelastrum reticulum Nageli, Straurastrumanatinum Meyen ex Ralfs and Ceratium hirundinella Muller. The high nutrient concentrations (nitrogen:17mgl-1 and orthophosphate: 0.7mgl-1) during the mid-summer peak of the rainy season were associated with the development of a bloom of the cyanobacterium Microcystis. Water quality data associated with the development of the Microcystis bloom suggest that the aquatic system of Lake Loskop has now entered an alternate, hyper trophic regime. This change over shadowed the adverse effects of high concentrations of heavy metal ions and low pH. Through out this study, the reference site in the lacustrine zone o fLake Loskop had lower concentrations of metal ions and sulphate, and higher pH values. The response of phytoplankton bioassays on integrated water samples from the different sampling sites did provide potential answers to the reasons for the absence of the algal group Chlorophyceae in the phytoplankton community structure in the riverine zone of the lake |
en |
dc.language.iso |
en |
en |
dc.publisher |
Elsevier |
en |
dc.subject |
Phytoplankton populations |
en |
dc.subject |
Cyanobacteria |
en |
dc.subject |
Phytoplankton bioassay |
en |
dc.subject |
Chlorophyll concentrations |
en |
dc.subject |
Metal ions |
en |
dc.subject |
Lake Loskop |
en |
dc.subject |
Nutrient pollution |
en |
dc.subject |
Acid mine drainage |
en |
dc.subject |
Ecotoxicology |
en |
dc.subject |
Environmental safety |
en |
dc.title |
Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa. |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Oberholster, P. J., Myburgh, J., Ashton, P., & Botha, A. (2009). Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa. http://hdl.handle.net/10204/3586 |
en_ZA |
dc.identifier.chicagocitation |
Oberholster, Paul J, JG Myburgh, PJ Ashton, and AM Botha "Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa." (2009) http://hdl.handle.net/10204/3586 |
en_ZA |
dc.identifier.vancouvercitation |
Oberholster PJ, Myburgh J, Ashton P, Botha A. Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa. 2009; http://hdl.handle.net/10204/3586. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Oberholster, Paul J
AU - Myburgh, JG
AU - Ashton, PJ
AU - Botha, AM
AB - The relationships between water quality and the phytoplankton community within Lake Loskop were studied during the late summer and autumn of 2008 to evaluate the impacts of acid mine drainage and high nutrient concentrations. The higher concentrations of metal ions and sulphate had adverse effects on certain phytoplankton species in the inflowing riverine zone of Lake Loskop, in comparison to the reference site in the lacustrine zone of the lake, which was dominated by the larger and slower growing late summer species of Coelastrum reticulum Nageli, Straurastrumanatinum Meyen ex Ralfs and Ceratium hirundinella Muller. The high nutrient concentrations (nitrogen:17mgl-1 and orthophosphate: 0.7mgl-1) during the mid-summer peak of the rainy season were associated with the development of a bloom of the cyanobacterium Microcystis. Water quality data associated with the development of the Microcystis bloom suggest that the aquatic system of Lake Loskop has now entered an alternate, hyper trophic regime. This change over shadowed the adverse effects of high concentrations of heavy metal ions and low pH. Through out this study, the reference site in the lacustrine zone o fLake Loskop had lower concentrations of metal ions and sulphate, and higher pH values. The response of phytoplankton bioassays on integrated water samples from the different sampling sites did provide potential answers to the reasons for the absence of the algal group Chlorophyceae in the phytoplankton community structure in the riverine zone of the lake
DA - 2009
DB - ResearchSpace
DP - CSIR
KW - Phytoplankton populations
KW - Cyanobacteria
KW - Phytoplankton bioassay
KW - Chlorophyll concentrations
KW - Metal ions
KW - Lake Loskop
KW - Nutrient pollution
KW - Acid mine drainage
KW - Ecotoxicology
KW - Environmental safety
LK - https://researchspace.csir.co.za
PY - 2009
SM - 0147-6513
T1 - Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa
TI - Responses of phytoplankton upon exposure to a mixture of acid mine drainage and high levels of nutrient pollution in Lake Loskop, South Africa
UR - http://hdl.handle.net/10204/3586
ER -
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en_ZA |