Answer:
It depends on whether or not the organism is a producer or a predator. If the organism removed is a producer, every other organism that relies on said producer for food will not be able to survive. If the organism removed is a predator, the organisms that said predator eats will flourish, diminishing the natural resources in the ecosystem and inevitably starving the population of the ecosystem.
Explanation:
Probably erosion...either by wind, run-off water or a river that drains into the ocean near the ports.
Hope this helps!