if i took out the polar cod the ringed seal would become extic from having nothing to eat if the ringed seal die out the polar bear would have no food to eaten and the polar bears will die the edier duck will over populate and if the over populate the other duck will be over took at make all the other duck become extic. and so if you take out one organism the whole ecosystem will be effected with death or over population and that could cause problem Evan in the human world to.
this is the main resourse of the food web