Using satellite images to measure ecological metrics of landscape of the conserved area of North Iran

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Research Paper 01/01/2013
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Using satellite images to measure ecological metrics of landscape of the conserved area of North Iran

Robab Ahmadzadeh, Mohammad Dehdar Dargahi, Seyed Armin Hashemi, Leila Ooshaksarayee
J. Bio. Env. Sci.3( 1), 69-76, January 2013.
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Abstract

Landscape ecology is a new view which concerns the interactions between spatial pattern and ecological processes. Important principles of landscape include: landscape composition, structure, operation and change. To quantify the landscape features and to assess and study the habitat at landscape scale, landscape metrics are used. By quantifying these features, managerial decisions for conservation can be made more rapidly and cost-efficiently. Efforts are made here for using these metrics to make decisions concerning conservation in the limits of a conserved area and to facilitate doing studies in this field to be able to use the data obtained from the landscape ecological metrics together with other environmental and ecological factors for making decision and for managing the area under management . To this aim, Bojagh national park was chosen as the study area. Bojagh national park in Guilan province, measuring 3266.83 ha, is the first national park in Iran. Initially, by using satellite images of Bojagh national park area, obtained from IRS satellite, classification by ENVI 4.8 software was done based on surface covers, and then habitat patches were separated by using Arc GIS 9.3 software. After that, ecological metrics were measured by Patch analyst software. Totally 12 metrics out of the 15 ones were calculated per patch. Through interpreting the results, desirable information is provided about the area, folding and the extent of patches contact with the surrounding environment. The greatest area and total edge are those of the open water body and the highest extent of folding is related to the western sandy lands of beach margin.

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