FIELD ENVIRONMENT OBSERVATION OF THE GROWTH STRUCTURE OF EELGRASS BED IN THE YATSUSHIRO SEA

Abstract

 The regional peculiarity and environmental condition of eelgrass growth in the Yatsushiro Ocean were examined. During the observation, it was a decline period from the golden age of eelgrass. The result of geographical feature investigation showed that the average slope of a turtle grass place was 1/100 or less. Growing the altitude TP in -3〜-2m was checked. Moreover, as compared with the past result of research, growth at 28°C or more was checked for the mud content of 40% or more in the average water August.