Landscape Ecology; Ecological networks; land use; Landscape metrics

Land fragmentation is the most important urban development challenge that blocks the flow of materials and energy in the region. These changes greatly affect ecological characteristics, so ecological networks are considered as tools for conservation planning. In this regard, order, satellite images were used to evaluate the ecological networks of Karaj Metropolis in 2006, 2011 and 2017. Classification and preparation of land use map based on land cover and with the support vector machine algorithm. Landmarks were also used to assess the status quo and the process of changing heterogeneity, continuity and communication-isolation networks in previous years. The results showed that the trend of changing the criteria in the study area is not desirable. Inappropriate process of changing heterogeneity criteria Space landscape, The conjunction of the same spots across the land and the optimal communication reduces the ecological function and the consequent decline in the sustainability of ecological networks also, due to the reduction process, the metric of green spots, especially human green, was made and the increasing trend of construction metrics and open spots In sum, it can be concluded that the ecological function of the landscape and the ecological network characteristics of the descending of landscape are followed.