Chapter50 Ecology Major Biomes

Chapter50 Ecology Major Biomes - Ecology: Major Biomes...

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Ecology: Major Biomes Ecology: Major Biomes Biomes: terrestrial ecosystems within specific climatic regions
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Outline Outline 1. Key concepts 2. The sun and its effects on climate 3. Atmospheric circulation and its effects on climate 4. Biomes cover wide geographic areas 5. Key Terms 6. Conclusions
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Key Concepts: Key Concepts: Energy from the sun is the initial energy source for nearly all ecosystems on Earth Interactions among global air circulation patterns, and ocean currents result in regional variations in patterns of temperature and rainfall
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Key Concepts: Key Concepts: A biome is a large unit of land that is characterized by climax vegetation of the ecosystem within its boundaries Water covers more than 71% of the earth’s surface
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The sun and its The sun and its effects on climate effects on climate Biomes: terrestrial ecosystems within specific climatic regions Characteristics determined by temperature and rainfall (climate) and geographic features (mountains, etc.) · Heat from sun and its seasonal variations · Global atmospheric and oceanic circulation patterns
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Biomes cover wide Biomes cover wide geographic areas geographic areas Biomes classified into nine categories: Tundra Taiga Temperate deciduous forest Grassland Relic conifer forest Chaparral Desert Savannah Tropical rain forest
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Biomes Biomes
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Biomes Biomes
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Biomes Biomes
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Succession
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Succession
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Tundra-1 Tundra-1 Most northerly biome in Eurasia, North America; between taiga forests and permanent ice Characteristics: · Meadow-like vegetation: sedges (few grasses), and lichens · Long, cold winters with low annual rainfall; Permafrost (permanent ice never melts); Warmest month has average daily mean temperature of 10ºC or less · Short summers (growing season 2-4 months )
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Tundra -2 Tundra -2 Tundra : latitudinal (arctic) tundra and montane tundra (alpine tundra) Asexual reproduction Few species (the simplest biome) About top 30 cm soil thaws during the growing season, roots can freely penetrate it. Below that, the soil water permanently frozen
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This note was uploaded on 05/05/2008 for the course BIO 52030 taught by Professor Zhao during the Fall '07 term at University of Texas at Austin.

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Chapter50 Ecology Major Biomes - Ecology: Major Biomes...

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