Unknown
In:
http://aquaticcommons.org/id/eprint/20531
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4230
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2016-04-22 09:28:27
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20531
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National Fisheries Resources Research Institute, Uganda
Publication Date:
2021-07-10
Description:
In May, 1971, Lake Mahega had pronounced mesothermy (40.W C at one metre). Solar heating of a bloom of baeteria and the blue-green alga, Synechococcus bacillaris Butch., probably caused the high temperature. A total ionic concentration gradient increasing from 192,600 mg 1itre-1 at the surface to 415,200 mg•litre- 1 at three metres stabilized the thermally inverted water. Nearly equal amounts of chloride and sulphate accounted for about 90% of the anionic composition. Sodium was the major cation.Crystals or the triple salt, northupite (Na2 CO3. MgCO3. NaCl) and of thenardite (Na2SO4) were mixed with the surface sediment. We believe it is possible that primary northupite depnsition is occurring. Lake Mahegais also the first mesothermic, sulphato-chloride lake reported for East Africa.
Keywords:
Limnology
Repository Name:
AquaDocs
Type:
article
Format:
application/pdf
Format:
application/pdf
Format:
141-150
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