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Based on the article: River Life Through U.S. Broadly Degraded. By William K. Stevens, Jan. 26, 93 Society has been presented with a broad spectrum of cause and effectrelationships within the water based ecosystems. Without a conscious effort torehabilitate our water systems many rivers and lakes are doomed. We have to look afterthis precious resource. Fortunately many new controls and clean up programs have beenRivers are being devastated due to physical and ecological transformation. Thisdecrease in the quality of river and water bodies results from human activities andprocesses. The ecosystems are changing rapidly. It is necessary to maintain aconsistent balance in these ecosystems. Imbalances are occurring with nutrient levels,water temperature, water level, and sedimentation. "The stream then carries moresediment and becomes wider, shallower, and warmer, making the water unfit for manyvital organisms." (Stevens, New York Times, Jan. 26, 1993) The activities affecting the streams are as diverse as the areas in which streamsare being affected. Dams are capable of destroying total ecosystems. They affectwater levels, and thus affect water temperature.
The effects ofacid rain take a heavy toll on ecosystems whether they are water based or not. In addition chemical fertilizer and animal waste products run off causes an overabundance of nutrients being added to the water disrupting the delicate balances. In addition chemical fertilizer and animal waste products run off causes an overabundance of nutrients being added to the water disrupting the delicate balances. Another problem the river ecosystems are facing are exotic species. Somespecies are just naturally occurring incidence, others are human introduced. After an area is cleared thechemical balances are affected as well. The effects ofacid rain take a heavy toll on ecosystems whether they are water based or not. Development of land often results in the straightening, channeling, and diversionof the rivers and streams. There are a number of factors affecting our riversand ecosystems. BIBLIOGRAPHYDonald Charles, "Acid Rain Not Only To Blame," AANature,AA April 29, 93, P. Channeling and diversion can also be found in agriculture and farming practices. By liming theentire watershed, the treatment can last five to ten years. " (Marx, EPA Journal, Sept-Oct, 92) Heated effluent releasedinto river ecosystems are often detrimental. Many rivers and streams have simply dried up most of theyear, and some never make it all the way to the ocean.
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Acceptance Essays
