| key concept 53.1 Ecology Is the Study of the Interrelationships among Organisms and the Environment
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| Modern ecology has a more âuse-inspiredâ focus
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| Ecology is studied at many levels of organization
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| Answering ecological questions requires observations, experiments, and models
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| key concept 53.2 Global Climate Is a Fundamental Component of the Physical Environment
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| Solar radiation drives global climate patterns
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| Earth is a sphere, creating latitudinal variation in global temperature and precipitation
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| Earth spins on an axis, producing prevailing winds and ocean currents
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| The tilt of Earthâs axis and its orbit result in seasons
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| key concept 53.3 Topography, Vegetation, and Humans Modify the Physical Environment
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| Earthâs topography affects the local and regional physical environment
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| Vegetation affects the local and regional physical environment, especially climate
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| Humans have transformed their physical environment, including urban climate
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| key concept 53.4 Biogeography Is the Study of How Organisms Are Distributed on Earth
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| Patterns of biogeography are interconnected across a hierarchy of spatial and temporal scales
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| Terrestrial biomes reflect global patterns of temperature and precipitation
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| Biogeographic regions reflect evolutionary isolation
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| Diversity varies with latitude and longitude
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| Geographic variation in diversity is explained by multiple factors
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| key concept 53.5 Geographic Area and Humans Affect Regional Species Diversity
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| Humans exert a powerful influence on biogeographic patterns
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| Apply What Youâve Learned
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