by consuming large numbers of sea urchins,sea otters act as a keystone species structuring the kelp forest community.455
问题描述：
by consuming large numbers of sea urchins,sea otters act as a keystone species structuring the kelp forest community.4559
答
by consuming large numbers of sea urchins,sea otters act as a keystone species structuring the kelp forest community
【由于食用大量的海胆类生物,海獭构成了藻丛群落中的一类关键物种.】