BIOA02H3 Chapter : Ecosystems

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BIOA02H3 Full Course Notes
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BIOA02H3 Full Course Notes
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Earth is a closed system with respect to matter open system with respect to energy. Over very long time scales, most materials that cycle through the four compartments: exchange materials with their surface, respond slowly to inputs, receive material from land in river runoff end up in the oceans. the atmosphere only at. In lakes, nutrients taken up by aquatic organisms end up as part of the sediment. Surface waters of lakes become depleted in nutrients. Turnover in deep lakes is controlled by temperature. In summer, surface waters warm, and the less dense water layer floats over colder, denser bottom water. The stratosphere extends out to about 50 km. Most materials enter stratosphere at the intertropical convergence zone. A layer of ozone in the stratosphere absorbs most of the uv radiation from the sun. www. notesolution. com. Most global air circulation and all water vapor is in the troposphere.

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