Biome-part 2

A natural disaster has hit the freshwater lake biome of the Pacific Northwest. Deforestation. A logging company has come in and clear cut a patch of trees on a slope just above a lake. The effects are not seen immediately, but in 2 to 3 seasons, they will be very relevant. As the trees are cut, the slopes are left bare and exposed to the elements. As you may know, the Pacific Northwest has a primarily rainy climate. These two factors, an exposed slope and rain, lead up to erosion. Large sediment loads are washed into the lake. The first and greatest impact the erosion will have is on Salmon. Salmon effect numerous species in the freshwater lake biome, both terrestrial and aquatic. They are a keystone species.  On land, Grizzly bears' diet of Salmon will be completely eliminated. The increased sediment load in the lake and surrounding streams makes it impossible for the salmon to survive. The other aspect which Salmon will effect is the nutrient movement throughout the river and streams. When Salmon go up-stream to spawn, they die, and their carcasses decay providing nutrients for everything from micro organisms to plants, and all the way up to juvenile salmon.