This allows
             water to run off too quickly, thus reducing the water holding capacity of the land, and
             adding to sedimentation. Channeling and diversion can also be found in agriculture and farming practices.
             In addition chemical fertilizer and animal waste products run off causes an over
             abundance of nutrients being added to the water disrupting the delicate balances.
             Plowing and other practices leave soil victim to erosion which adds to the
             Forestry is also a major cause of stream sedimentation. When the plant material
             is removed the soil surface it is left very susceptible to erosion. This produces a lot
             of excess sedimentation over a long period of time. After an area is cleared the
             chemical balances are affected as well. "In particular, Ranberg and colleagues proved
             that alkalinity increased when forest land was converted into agricultural land and
             acidification occurred when practices were abandoned." (Charles, Nature, April 29,
             93) This clearly shows how the lake chemistry is affected by forestry and agriculture.
             Urban and suburban areas are also to blame. We continuously remove water from
             our water ways for use, and replace it with wastes. This leads to nutrification and
             general deterioration of the water. "Nationwide, there are 2,100 health advisories for
             fish contaminated by toxic chemicals, according to a 1991 National Academy of Sciences
             report, Seafood Safety." (Marx, EPA Journal, Sept-Oct, 92) Heated effluent released
             into river ecosystems are often detrimental. Emissions affect lake and river
             acidification and therefore the ability to support aquatic organisms. The effects of
             acid rain take a heavy toll on ecosystems whether they are water based or not.
             Another problem the river ecosystems are facing are exotic species.
             ...