Assignment 04.1

Assignment 04.1 - Part 1: The attributes of the Lake Cayuga...

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Part 1: The attributes of the Lake Cayuga ecosystem include many biotic and abiotic factors. Biotic factors are the plants and fish and microorganism in the lake. The abiotic components are the soil, the rocks, the water and the physical attributes of the lake such as depth, current, surface wind and general structure. There are many matter and energy exchanges in the Lake Cayuga ecosystem. The sun heats the water. The weather effects the temperature and the action of the surface. The fish eat other fish, microorganisms and plants. The plants absorb sunlight and get nutrients from the water and soil in the lake. Heat is added and subtracted from the lake due to the LSC project and the heat exchangers. A current is also surely formed. The change in temperature on the surface changes the makeup of minerals in the water and this also has an effect. There is clearly an interaction between the temperature of the lake at various depths and the life-forms found there. It is true that plants and fish can deal with temperature variations, but the effect that a change in temperature does not end there. It effects the levels of nutrients and o2 in the water. It also will change the concentration of nitrates and phosphates in the water. These are important to plant growth. An increase in phosphate has been proven to greatly effect plant growth rate. People fear that such an increase will effectively choke the lake. This will make it impossible for fish to survive and it will make it unusable by boaters, bathers and tourists alike. It will smell bad, and animals will no longer be able to drink, play or bathe in the water. The changes in the phosphate level are ALLOGENIC changes. They are caused by human tampering with environmental conditions. It is also true that autogenic changes would take place. These include the changes in numbers of fish vs. plants. This has to do with the human interaction, but is more of an internal change. There are also possible BIOGENIC changes. A species that would not normally thrive in the lake could
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This note was uploaded on 05/06/2008 for the course BEE 3299 taught by Professor Scott,n.r. during the Spring '07 term at Cornell.

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Assignment 04.1 - Part 1: The attributes of the Lake Cayuga...

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