this is because ecosystem services are dependent on one another and exhibit complex interactions that generate tradeoffs in the delivery of one ecosystem service relative to the delivery of others for the ocean economy this is relevant because these interactions determine indirectly the viability of oceanbased industries by way of illustration coastal runoff and eutrophication acidification through increasing greenhouse gas ghg emissions and poor water quality through pollution lead to changes in fish migration patterns and even extinction of fish stocks all are examples of how human activity indirectly intervenes in the functioning of marine ecosystems thereby undermining the economic viability of the ocean economy