OCR for page 196 6 Causes and Effects in the Bering Sea Ecosystem r Population changes in some Bering Sea marine mammal, seabird, shellfish, and fish species over the last 30 years may indicate changes that could affect the long-term status of the Bering Sea ecosystem as a natural resource.
(Causes and Effects in the Bering Sea Ecosystem r Population changes in some Bering Sea marine mammal, seabird, shellfish, and fish species over the last 30 years; may indicate; changes that could affect the long-term status of the Bering Sea ecosystem as a natural resource) (changes; could affect; the long-term status of the Bering Sea ecosystem as a natural resource)
Causes and Effects in the Bering Sea Ecosystem r Population changes in some Bering Sea marine mammal, seabird, shellfish, and fish species over the last 30 years changes
may indicate could affect
changes that could affect the long-term status of the Bering Sea ecosystem as a natural resource
the long-term status of the Bering Sea ecosystem as a natural resource