Investigating and comparing the species diversity indices of birds in Isfahan Urban Parks (Case study: Isaargaran to Najwan Park)

The urban green space, with its food resources, water, and shelter, can support a significant number of birds. For this reason, studying the number and species of birds in urban parks can be effective in monitoring the health of ecosystems. To study the number and species of birds in the parks of Zayandeh-Rud, two transects with an approximate length of 4.5 km along the studied parks were established in the spring 2019. The distance between the sampling points on each transect was 50 meters, the number of sampling points was 50 points and the total of 100 sampling points or stations was designed. The number and pattern of bird distribution was performed using the point counting method every 5 minutes during each study, and all observed birds were recorded up to 50 m away. Using binoculars as well as sound tracking, existing birds were recorded and identified. The total number of observed species is 41, in which Passeriformes with 31 species have the highest frequency among other orders. All three Simpson, Shannon Wiener and Brillouin indices in Najwan Park have the highest values. The numbers of tree species in Nazhvan Park (756 trees) is in the second place after Saadi Park (1092 trees). The moderate weather, the distance from urban stresses and noise pollution can be considered as the reasons for the existence of high species diversity.