The graph shown above is from one of the most well-known and on-going ecological studies ever performed. isle royal national park, an island on lake superior, keeps data of populations of wolves and moose living there. the moose are a major food source for the wolves.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.