dc.contributor.author |
Ashton, PJ
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dc.contributor.author |
Chutter, PM
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dc.contributor.author |
Cochrane, KL
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dc.contributor.author |
De Moor, FC
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dc.contributor.author |
Hely-Hutchinson, JR
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dc.contributor.author |
Jarvis, AC
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dc.contributor.author |
Robarts, RD
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dc.contributor.author |
Scott, WE
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dc.contributor.author |
Thornton, JA
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dc.contributor.author |
Twinch, AJ
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dc.contributor.author |
Zohary, T
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dc.contributor.author |
Bostock, LB
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dc.contributor.author |
Combrink, S
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dc.contributor.author |
Fenn, TA
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dc.contributor.author |
Grimbeek, LM
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dc.contributor.author |
Herbst, HM
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dc.contributor.author |
Hills, MJ
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dc.contributor.author |
Mitchell, RF
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dc.contributor.author |
Pais Madeira, AM
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dc.contributor.author |
van Blommestein, SD
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dc.date.accessioned |
2008-08-25T12:56:51Z |
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dc.date.available |
2008-08-25T12:56:51Z |
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dc.date.issued |
1985 |
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dc.identifier.citation |
Ashton, PJ et al (Contributors). 1985. Limnology of Hartbeespoort. National Scientific Programmes Unit: CSIR, SANSP Report 110, 1985, pp 279 |
en |
dc.identifier.uri |
http://hdl.handle.net/10204/2425
|
|
dc.description.abstract |
Hartbeespoort Dam is a hypertrophic, warm, monomictic impoundment. With a mean depth of 9.6 m and a surface area of 20 km2, the system demonstrates that hypertrophy is not confined to small shallow lakes as concluded by Barica (1981). The combination of high nutrient loading, high incident solar radiation, low wind speeds and warm water makes it the ideal environment for the prolific growth of the buoyant blue-green alga, Miarooystis aeruginosa Photosynthetic production of this organism is regulated mainly by the penetration of light through the water column. The Miorooystis population grows to such large levels that the population self-shades itself, that is., the alga is usually the dominant factor regulating light penetration in the water. Unlike most hypertrophic lakes, wide spread anoxia resulting from the die-off of the large Miovoaystis population does not occur in Hartbeespoort Dam. Rather, Microcystis tends to accumulate in large, floating mats termed hyperscums and then is redistributed throughout the dam under favourable wind conditions. However, the anaerobic hypolimnion, which may extend upward to within about 8 m of the lake surface, contains large concentrations of reduced compounds and it is the release and distribution of these throughout the water which may result in almost total lake anoxia at overturn |
en |
dc.language.iso |
en |
en |
dc.publisher |
National Scientific Programmes Unit: CSIR |
en |
dc.relation.ispartofseries |
CSIR |
en |
dc.subject |
SANSP |
en |
dc.subject |
Hartbeespoort Dam |
en |
dc.subject |
Limnology |
en |
dc.subject |
Limnology Division of the National Insitute for Water Research |
en |
dc.subject |
Water Research Comission and Ecosystem programme |
en |
dc.title |
Limnology of hartbeespoort dam |
en |
dc.type |
Report |
en |
dc.identifier.apacitation |
Ashton, P., Chutter, P., Cochrane, K., De Moor, F., Hely-Hutchinson, J., Jarvis, A., ... van Blommestein, S. (1985). <i>Limnology of hartbeespoort dam</i> (CSIR). National Scientific Programmes Unit: CSIR. Retrieved from http://hdl.handle.net/10204/2425 |
en_ZA |
dc.identifier.chicagocitation |
Ashton, PJ, PM Chutter, KL Cochrane, FC De Moor, JR Hely-Hutchinson, AC Jarvis, RD Robarts, et al <i>Limnology of hartbeespoort dam.</i> CSIR. National Scientific Programmes Unit: CSIR, 1985. http://hdl.handle.net/10204/2425 |
en_ZA |
dc.identifier.vancouvercitation |
Ashton P, Chutter P, Cochrane K, De Moor F, Hely-Hutchinson J, Jarvis A, et al. Limnology of hartbeespoort dam. 1985 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/2425 |
en_ZA |
dc.identifier.ris |
TY - Report
AU - Ashton, PJ
AU - Chutter, PM
AU - Cochrane, KL
AU - De Moor, FC
AU - Hely-Hutchinson, JR
AU - Jarvis, AC
AU - Robarts, RD
AU - Scott, WE
AU - Thornton, JA
AU - Twinch, AJ
AU - Zohary, T
AU - Bostock, LB
AU - Combrink, S
AU - Fenn, TA
AU - Grimbeek, LM
AU - Herbst, HM
AU - Hills, MJ
AU - Mitchell, RF
AU - Pais Madeira, AM
AU - van Blommestein, SD
AB - Hartbeespoort Dam is a hypertrophic, warm, monomictic impoundment. With a mean depth of 9.6 m and a surface area of 20 km2, the system demonstrates that hypertrophy is not confined to small shallow lakes as concluded by Barica (1981). The combination of high nutrient loading, high incident solar radiation, low wind speeds and warm water makes it the ideal environment for the prolific growth of the buoyant blue-green alga, Miarooystis aeruginosa Photosynthetic production of this organism is regulated mainly by the penetration of light through the water column. The Miorooystis population grows to such large levels that the population self-shades itself, that is., the alga is usually the dominant factor regulating light penetration in the water. Unlike most hypertrophic lakes, wide spread anoxia resulting from the die-off of the large Miovoaystis population does not occur in Hartbeespoort Dam. Rather, Microcystis tends to accumulate in large, floating mats termed hyperscums and then is redistributed throughout the dam under favourable wind conditions. However, the anaerobic hypolimnion, which may extend upward to within about 8 m of the lake surface, contains large concentrations of reduced compounds and it is the release and distribution of these throughout the water which may result in almost total lake anoxia at overturn
DA - 1985
DB - ResearchSpace
DP - CSIR
KW - SANSP
KW - Hartbeespoort Dam
KW - Limnology
KW - Limnology Division of the National Insitute for Water Research
KW - Water Research Comission and Ecosystem programme
LK - https://researchspace.csir.co.za
PY - 1985
T1 - Limnology of hartbeespoort dam
TI - Limnology of hartbeespoort dam
UR - http://hdl.handle.net/10204/2425
ER -
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en_ZA |