Studies on the fresh water poisonous planktonic Cyanobacteria (blue green algae) of Manchar lake Dadu, Sindh, Pakistan

Mahar, M.A.; Jafri, S.I.H.; Leghari, S.M. . Dept. of Fresh Water Biology and Fisheries; Khuhawar, M.Y.; Noor, A.A.

Studies on the fresh water poisonous planktonic Cyanobacteria (blue green algae) of Manchar lake Dadu, Sindh, Pakistan

2000

Mahar, M.A. | Jafri, S.I.H. | Leghari, S.M. (Sindh Univ., Jamshoro (Pakistan). Dept. of Fresh Water Biology and Fisheries) | Khuhawar, M.Y. | Noor, A.A.

Manchar Lake is the largest fresh water lake and a vital source of potable water for thousands of families in Dadu District. The lake water quality has deteriorated due to increase in electrical conductivity, total dissolved solids, salinity, chlorides hardness and phosphates. Due to increase in the physico-chemical parameters of water a large number of microorganisms including a variety of Cyanobacterial toxic species, have been observed. These organisms are responsible for gastrointestinal illness, most often mentioned symptoms were vomiting, diarrhea, thirst, choking with wheezing and even frank foamy discharges from the nostrils, by drinking the lake water. In Manchar Lake the process of eutrophication is at its extreme due to shallowness of the basin, but the whole range of chemical parameters has gone up beyond the permissible limits.

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