EVALUATION OF BENTHIC HABITATS ON THE NAKASHIMA RESTORED IN THE ONGA RIVER AND FUTURE SUBJECTS

Abstract

The Nakashima nature restoration project, where are creeks, backwaters and wetlands, has been constructed by MLIT on 12km from the river mouth in the Onga River. We set 9 investigation spots and researched aquatic insects, physical environment and water quality in 2011 and 2012. It was cleared that the aquatic insects community structures of 3 types are different by cluster analysis. We make clear that the shoreline profiles are not diverse. Based on the results, we propose some shoreline profiles which keep an early stage of succession