Interesting comment.
Remarkably similiar to the scenario of "species collapse" outlined in Jarad Diamonds work, Collapse. [0] As species loose their ability to adapt in the environment the whole adjacent species start to be effected. Loose enough and whole groups that are closely inter-related disappear. You have to start questioning what are we doing wrong when the stable marine environments start to change so quickly.
[0] http://en.wikipedia.org/wiki/Collapse:_How_Societies_Choose_...