Abstract
Barren ground is widely distributed in the sea area. The growth of seaweed is effected by water temperature, wave height, solar radiation and other environmental factors. And feeding pressure of sea urchin is also important to predict seaweed growth. In this research, we have examined the prediction method of the seaweed growth, including how to use environmental date, and when seaweed begins to grow. Estimate results for past 8 years of seaweed amount from this method are almost coincide with observation result. We consider about the effect of decrease of crest depth of rear step.
