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Detailed Ecological Assessment Report 2008 – Keenjhar Lake More than 60 algal samples were collected from Keenjhar Lake, out of which 167 species belonging to 60 genera of 8 phyla namely Cyanophyta, Volvocophyta, Bacillariophyta, Dinophyta, Euglenophyta, Chrysophyta, Chlorophyta, and Charophyta were observed. The phyla Euglenophyta was not found in the summer survey. 4.5.1.3 Pai Forest In Pai Forest a total of 67 Algal species were collected in the summer survey which belonged to 32 genera of 6 phyla Cyanophyta, Volvocophyta, Bacillariophyta, Xanthophyta, Euglenophyta and Chlorophyta. A total of 33 (49.2%) species from 16 genera of phyla Cyanophyta, 10 (15%) species belongs to 7 genera of phyla Volvocophyta, 14 (20.8%) species belongs to 8 genera of phyla Bacillariophyta, 2 (3%) species belongs to 1 genus of phyla Xanthophyta, 4 (6%) species belongs to 2 genera of phyla Euglenophyta, 4 (6%) species belongs to 2 genera of phyla Chlorophyta. 4.5.1.4 Chotiari Reservoir More than 100 samples were collected from Chotiari reservoir dam, out of these a total of 359 algal species belonging to 116 genera of 9 phyla Cyanophyta, Volvocophyta, Bacillariophyta, Chrysophyta, Xanthophyta, Dinophyta, Euglenophyta, Chlorophyta and Charophyta, 80 aquatic plants and 32 fishes along with some physico-chemical parameters were recorded. The phyla Xanthophyta was not found in the summer survey. Twenty five algal samples were collected during the winter survey. Out of the 71 species belonging to 34 genera of 7 phyla e.g. Cyanophyta, Volvocophyta, Bacillariophyta, Xanthophyta, Euglenophyta, Chlorophyta and Charophyta along with seventeen aquatic plants and some physico-chemical parameter were recorded, water is rich in primary productivity and plant production. The phyla Charophyta was not found in the summer survey. 4.5.2 Account of number of species recorded All the samples from the four sites were of better quality during the winter surveys compared to the ones in summer (see Figure 42 below). This may be due to better water quality and lack of salinity which was observed in the summer months. Figure 42 – summer and winter comparison of the number of species collected in the four sites 400 350 300 250 200 150 100 50 0 26 Keti Bunder 150 65 Keenjhar Lake 167 85 WWF Pakistan – Indus for All Programme Page 151 of 188 Chotiari 359 67 71 Pai forest Summer Winter
Detailed Ecological Assessment Report 2008 – Keenjhar Lake Table 50 – Comparison of phylum during the summer and winter survey in all four sites. S.no Class Keti Bunder Keenjhar Lake Chotiari Pai Forest Summer Winter Summer Winter Summer Winter Summer Winter Phylum 1 Cyanophyta 2 Volvocophyta 3 Bacillariophyta 4 Xanthophyta 5 Dinophyta 6 Euglenophyta 7 Chlorophyta 8 Charophyta 9 Chrysophyta 4.6 Marine fisheries 4.6.1 Introductory note Comparison of freshwater fisheries is only applicable to Keenjhar Lake and Chotiari Reservoir and therefore only appears in these reports. There is a separate report for Keti Bunder under marine fisheries. 4.7 Zooplankton Note: there is no comparative study between the sites on zooplankton primarily because the results are so different between areas there is very little comparative data to use. Therefore the report on zooplankton has been kept to findings and discussion only 4.8 Physico-chemical properties of water 4.8.1 Summary of water quality 4.8.1.1 Drinking water • Keti Bunder Two samples were collected from the Keti Bunder Town area. Sample KB- B1/A1is representing the surface drainage discharging in to Hajamro Creek near to Keti Bunder Town and sample KB-B2/A2 is representing the Keti Bunder Town waste water discharging in to Hajamro creek near Keti Bunder Town (Table 2). Since these two effluents are falling into sea, therefore the National Environmental Quality Standards (NEQs) of Pakistan (for the effluents disposal into sea) are referred for comparison. It is worth mentioning that the time of sample collection (KB-B1) the water level in Hajamro creek at Keti Bunder Town and in the surface drain was high due to high tide which therefore flooded the surface drain. It is because of this the TDS and other related parameters such as EC, hardness, chlorides, sulphates were found higher than the sample collected from the same location after monsoon (KB-A1). This time the Hajamro Creek near to Keti Bunder Town and surface drain level were very low. The waste water coming from Keti Bunder Town contains washing water (originally KB water /saline water) used for different purposes excluding the drinking water). The drinking water is an expensive WWF Pakistan – Indus for All Programme Page 152 of 188
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