3:30 PM - 4:45 PM
[ACG24-P12] Spatial distribution pattern of willows in Indigirka river lowland of northeast Siberian Arctic
Keywords:vegetation, floodplain, NDVI, GIS
High resolution vegetation map and satellite derived NDVI were obtained from a WorldView-2 satellite image (10 x 10 km) based on the field observations in July 2013 near Chokurdakh (70oN, 148oE). The willow distribution pattern corresponding to a distance from the river was analyzed. The willow covers 1/6 of lowland in local scale, and showed large extent along mainstream of the Indigirka River. This implies that large area along the main stream is affected by spring flooding, and willows cover this area. Besides, the area covered by willows showed the highest NDVI among the vegetation classes. These results mean the willow vegetation along the main stream and tributaries may greatly affect the primary production in river lowland of northeast Siberian Arctic.