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Published byHomer Copeland Modified over 8 years ago
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Habitat Diversity What is the link between Evolution & Adaptation, & the diversity of Habitats found on Earth?
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The geographic distribution of terrestrial biomes is based mainly on regional variations in climate
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Climograph: What are the main climatic variables for biomes?
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The Nature of Biomes focus on structure of vegetation – not species composition climatic regimes cause particular adaptations in plants, animals, etc. biomes characterized by the dominant life forms that come about in response to different environments
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Tropical forests: close to the equator, no seasons or only slight receive high rainfall (usually) diverse plant and animal life Forest structure = layered; most trees = ?
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Savannas: grasslands with scattered trees have distinct wet & dry seasons structure = open, wide-spaced trees abundant grazing animals & their predators
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Deserts: low rainfall hot temperatures vegetation sparse… many animals adaptations to avoid heat
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Chaparral: mild wet winters & dry hot summers (“Mediterranean”) contain dense spiny, evergreen shrubs have periodic fires many plant adaptations to fire
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Temperate grasslands: seasonal drought occasional fires dominated by what kinds of vegetation? What kinds of animals should be expected?
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Temperate deciduous forests: have very cold winters and hot summers house dense, diverse forests trees adaptations to climate? humans have logged many of these forests around the world.
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Coniferous forests: largest terrestrial biome on earth long cold winters and short wet summers conifers found here = adapted to the climate conifer forests home to various animals, some of which hibernate
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Tundra: climate windy and cold; causes short growing season layer of permafrost found below 1 meter and does not thaw - prevents root growth Plant adaptations required? not many animals live in tundra biomes; what adaptations? two types: Arctic - found in areas of Alaska and Arctic circle Alpine - found on very high mountaintops
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Arctic Tundra
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