04a Biomes - Larger ecological units I. The earth as an...

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Larger ecological units I. The earth as an interconnected set of systems A. Biosphere (ecosphere): contains the following: 1. Atmosphere 2. Hydrosphere 3. Lithosphere II. Biomes - Areas sharing similar climate, topographic and soil conditions, and roughly comparable communities. A. Temperature and precipitation are among the most important determinants in biome distribution. B. Evapotranspiration C. Influenced by prevailing landforms. III. Terrestrial Biomes A. Deserts 1. low moisture levels and infrequent precipitation 2. Wide daily and seasonal temperature fluctuations. 3. Soils are easily disturbed 4. Plants exhibit water conservation. B. Grasslands 1. Communities of grasses, seasonal herbaceous flowering plants, and open savannas. 2. Few trees. 3. Large temperature fluctuations. 4. Frequent grass fires. C. Tundra 1. Short growing season. 2. Cold, harsh winters. 3. Water locked up. 4. Most animals migrate in winter. 5.
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This note was uploaded on 05/25/2011 for the course BIO 105 taught by Professor Staff during the Spring '08 term at Grand Valley State.

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04a Biomes - Larger ecological units I. The earth as an...

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