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Index value 0.96 0.94 0.92 Detailed Ecological Assessment Report 2008 – Keenjhar Lake 0.9 0.88 0.86 0.84 0.82 0.8 0.78 0.76 0.93 0.82 WWF Pakistan – Indus for All Programme Page 147 of 188 0.94 0.91 0.94 Keti Bunder Keenjhar lake Pai Forest Sites Chotiari Reservoir Keti Shah The higher value of Simpson’s index in above table and graph clearly spell out that bird species are evenly distributed at Keti Shah, Pai Forest and Keti Bunder. However, Keenjhar Lake’s comparatively lower value implies dominance of fewer bird species at that lake. The sites can be arranged on a scale of species evenness in descending order as: Shah Belo and Pai Forest > Keti Bunder > Chotiari Wetlands Complex > Keenjhar lake 4.4.3.3 Summer and winter The following table and figures compare the biodiversity index, similarity and Simpson’s index over the sites and over the season. Table 48 and Figure 39 show the biodiversity index over site and season Table 48 – Biodiversity index over sites and over season S.No Site Summer Winter 1 Keti Bunder 0.04 0.02 2 Keenjhar Lake 0.01 0.007 3 Pai Forest 0.03 0.044 4 Chotiari Reservoir 0.01 0.005 5 Keti Shah 0.01 0.032 Figure 39 – Biodiversity indexes for all sites over summer and winter
Index value Detailed Ecological Assessment Report 2008 – Keenjhar Lake 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0.04 0.02 0.01 0.007 0.03 0.044 0.01 0.01 0.005 Keti Bunder Keenjhar Lake Pai Forest Chotiari Reservoir Sites 0.032 Keti Shah Summer Winter As can be seen in Figure 39, diversity is quite changeable over time and space. Pai Forest has the highest diversity in winter whereas Keti Bunder had the highest diversity in summer. Chotiari Reservoir is thought to be the most diverse site under the Indus for All Programme. However it is on par with Keenjhar Lake for both summer and winter. It is inferred that migration and anthropogenic factors such as hunting, trapping and habitat removal may be causing birds to avoid certain areas that may include our site areas. Figure 40 shows the similarity between the sites. Summer Winter Similarity Index Keenjhar Lake and Keti Bunder 0.62 0.51 Similarity Index Keenjhar Lake and Chotiari Reservoir 0.56 0.62 Similarity Index Keenjhar Lake and Keti Shah 0.62 0.5 Similarity Index Keenjhar Lake and Pai Forest 0.59 0.62 Similarity Index Keti Bunder and Chotiari Reservoir 0.53 0.43 Similarity Index Keti Bunder and Keti Shah 0.68 0.45 Similarity Index Keti Bunder and Pai Forest 0.68 0.48 Similarity Index Chotiari Reservoir and Keti Shah 0.6 0.52 Similarity Index Chotiari Reservoir and Pai Forest 0.54 0.43 Similarity Index Keti Shah and Pai Forest 0.64 0.58 Figure 40 – Similarity index between sites and over season WWF Pakistan – Indus for All Programme Page 148 of 188
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