Survey of microhabitats use by birds in national parks (case study: wetland Boujagh National Park, southwest Caspian Sea, Iran).

The sensitive marine areas have attracted particular attention for biological management because of having special ecological, economic, social and environmental traits. The present research tries to investigate the role of birds for identification of marine biological sensitive areas and as a case study the Boujagh National Park has been chosen. The method used in this study is an analyticalfunctional one which is done through selecting the one main criterion and five inferior criteria and after selecting all criteria by means of scoring method (ranking) all criteria would have quantitative value. Based on the discussed methodology above the study area was divided to 33500 ha parcels (assessment Unit of 2.2×2.2 kilometers grids). After field observations and interpretation of aerial photos and satellite images the characteristics of each parcel in the form of selected criteria have been analyzed and therefore the information layers were produced in Geographic Information System soft wares. The results shows that the bird population in 57.58% of study units is less than 1000 birds and also 33.33% of study units lacks of biodiversity and 39.39% of the study units have three threatened species. Total identified birds in study area was 153 species, amongst them 21% of species are as Protected Species in National Environmental laws and at least two species were of the IUCN Red List.