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Comparison value 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 Detailed Ecological Assessment Report 2008 – Keenjhar Lake 0.62 0.62 0.56 0.62 0.51 0.5 Keenjhar Lake and Keti Bunder Keenjhar Lake and Chotiari Reservoir Keenjhar Lake and Keti Shah 0.62 0.59 0.53 Sites Keenjhar Lake and Pai Forest 0.43 Keti Bunder and Chotiari Reservoir 0.68 0.68 WWF Pakistan – Indus for All Programme Page 149 of 188 0.45 Keti Bunder and Keti Shah 0.48 Keti Bunder and Pai Forest 0.6 0.52 Chotiari Reservoir and Keti Shah 0.54 0.43 Chotiari Reservoir and Pai Forest 0.64 0.58 Keti Shah and Pai Forest Summer As with the diversity index, there is significant variation over winter and summer seasons. In summer there is more similarity with Keti Bunder – Keti Shah and Keti Bunder – Pai Forest whereas in winter the similarity lies in Keenjhar Lake – Pai Forest and Keenjhar Lake – Chotiari Reservoir. Again this indicates that the arrival (or departure) of migratory birds and/or differing levels of disturbance over the seasons is affecting the presence and absence of birds across the sites. Winter The following Table 49 and Figure 41 show the Simpson’s index over sites and season. Table 49 – Simpson’s index over site and season S.no Site Summer Winter 1 Keti Bunder 0.95 0.93 2 Keenjhar lake 0.94 0.82 3 Pai Forest 0.95 0.94 4 Chotiari Reservoir 0.91 0.91 5 Keti Shah 0.91 0.94 Index value 1 0.95 0.9 0.85 0.8 0.75 Figure 41 – Simpson’s index over sites and seasons Keti Bunder Keenjhar lake Pai Forest Chotiari Reservoir Sites Keti Shah Summer Winter
Detailed Ecological Assessment Report 2008 – Keenjhar Lake Apart from Keenjhar Lake, there is not much difference in the Simpson’s index apart from slightly lower levels in winter. This does not necessary mean less species but since less evenness across the population of species. Image 12 – Oriental reed-warbler at Keenjhar Lake Image 13 – White wagtail at Keenjhar Lake Image 14 – Indian Robin at Keti Shah Image 15 – Striated babbler at Keti Shah 4.5 Phytoplankton 4.5.1 Summary 4.5.1.1 Keti Bunder In Keti Bunder a total of 76 samples were collected and during the summer 26 algal/phytoplankton samples were collected out of which 39 algal species belonged to 30 genera of 6 phyla (Cyanophyta, Volvocophyta, Bacillariophyta, Xanthophyta, Dinophyta, Euglenophyta and Chlorophyta). During the winter surveys a total of 50 algal samples were collected in Keti Bunder; out of which 150 algal/phytoplankton species belonged to 65 genera of 8 phyla namely Cyanophyta, Volvocophyta, Dinophyta, Bacillariophyta, Xanthophyta, Euglenophyta, Chlorophyta and Charophyta. The phyla Charophyta was not found in the summer survey. 4.5.1.2 Keenjhar Lake In Keenjhar Lake a total of 65 algal/phytoplankton samples were collected during this period out of which 155 algal species belonging to 53 genera of 7 phyla (Cyanophyta, Volvocophyta, Bacillariophyta, Chrysophyta, Dinophyta, Chlorophyta, and Charophyta in the summer. In Chotiari a total of 85 algal/phytoplankton samples were collected during the summer months out of which 248 algal species belonging to 96 genera of 9 phyla (Cyanophyta, Volvocophyta, Bacillariophyta, Chrysophyta, Xanthophyta, Dinophyta, Euglenophyta, Chlorophyta, and Charophyta. WWF Pakistan – Indus for All Programme Page 150 of 188
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