The base of the food chain (the small marine plants in the ocean) declined to such an extent that most of the larger organisms also collapsed--- a chain reaction .
(The base of the food chain; declined; to such an extent that most of the larger organisms also collapsed--- a chain reaction) (most of the larger organisms; also collapsed; )
The base of the food chain most of the larger organisms
declined also collapsed
to such an extent that most of the larger organisms also collapsed--- a chain reaction