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Ecosystem Assignment 4_Solutions

Ecosystem Assignment 4_Solutions - 1 Describe the...

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1. Describe the attributes of the Lake Cayuga ecosystem (biotic & abiotic subcomponents; matter and energy exchanges between components; interaction & interdependencies; autogentic, allogenic & biogenic processes; etc.) Lake Cayuga is New York’s second largest finger lake, with an area of 42,956 acres and length of 40 miles long. Lake Cayuga’s max depth of 435 feet and volume of 2.5 trillion gallons creates a very unique ecosystem for many biotic and abiotic organisms. Up state New York has very dramatic seasons, where the weather and temperature changes drastically throughout the year. Deep lakes contain three distinct zones, each with different types of organisms. The Littoral Zone is the areas closest to the shore where light reaches all the way to the bottom. With available sunlight plants and algae are able to survive. The temperatures of the shallow areas of the lake fluctuate with the seasons consistently freezing thick in the winters and remaining warmer in the summer months. The next zone is the Limnetic zone where the amount of available light decreases the further you go down. The Limnetic zone is where photosynthesis can occur. Floating microorganisms called plankton and other swimming animals call nekton survive in this zone. The lakes extensive depths are the Profundal zone, where very little light is able to reach. Lake Cayuga has depths over 400 feet which water is not reaches but the light so these deep areas remain very cold throughout the year, called morphometry. Bottom-dwelling animals called benthos survive down here off organic matter that drifts down to the bottom. The dramatic depths of Lake Cayuga and fluctuating temperatures in the area produce distinct divisions in the lake. In the warmer seasons the shallow areas become oxygen rich but because the deeper areas remain very cold the warmers oxygen rich water doesn’t mix with the deeper water. When the surface water begins to cool and become denser, it sinks to the bottom making the deeper areas contain more oxygen. 2. Independently investigate some of the benefits and drawbacks of the Lake Source Cooling Project by exploring the following questions. Try to do your own calculations rather than just repeating information from the websites By this we mean assess the magnitude of the numbers and use them to extend to a consideration of the significance of the effects of the project as addressed below.
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How does the project impact on the university's use of electrical energy? Provide a quantitative estimate of net effects.
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