Microsoft PowerPoint - Chapter50

Microsoft PowerPoint - Chapter50 - 1 Ecology: Major Biomes...

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Unformatted text preview: 1 Ecology: Major Biomes Ecology: Major Biomes Biomes: terrestrial ecosystems within specific climatic regions 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 Key Concepts: Key Concepts: c Energy from the sun is the initial energy source for nearly all ecosystems on Earth c Interactions among global air circulation patterns, and ocean currents result in regional variations in patterns of temperature and rainfall 2 Key Concepts: Key Concepts: c A biome is a large unit of land that is characterized by climax vegetation of the ecosystem within its boundaries c Water covers more than 71% of the earths surface The sun and its The sun and its effects on climate effects on climate c Biomes: terrestrial ecosystems within specific climatic regions c 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 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 3 Biomes Biomes Biomes Biomes Biomes Biomes 4 Succession Succession Tundra 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 10C or less Short summers (growing season 2-4 months) 5 Tundra Tundra -2 c Tundra : latitudinal (arctic) tundra and montane tundra (alpine tundra) c Asexual reproduction c Few species (the simplest biome) c About top 30 cm soil thaws during the growing season, roots can freely penetrate it. season, roots can freely penetrate it....
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Microsoft PowerPoint - Chapter50 - 1 Ecology: Major Biomes...

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