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The Biosphere/ Ecology Notes

The Biosphere/ Ecology Notes. What is Ecology?. Scientific study of interactions among organisms and between organisms and their environment. Biosphere. Combined portions of the planet in which all of life exists, including land, water and air or atmosphere

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The Biosphere/ Ecology Notes

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  1. The Biosphere/ Ecology Notes

  2. What is Ecology? • Scientific study of interactions among organisms and between organisms and their environment

  3. Biosphere • Combined portions of the planet in which all of life exists, including land, water and air or atmosphere • Extends from 8 kilometers above Earth’s surface to 11 kilometers below the surface of the ocean

  4. Interactions and Interdependence • Interactions within the biosphere produce a web of interdependence between organisms and the environment in which they live

  5. Levels of Organization • Individual: interactions between an organism and its surroundings • cottontail rabbit • Population: groups of individuals that belong to the same species and live in the same area • group of cottontail rabbits

  6. Levels of Organization • Communities: different populations that live together in a defined area • rabbits, coyotes, ravens, lizard • Ecosystem: collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment • rabbits, coyotes, ravens, lizard, rocks, dirt, climate, water

  7. Levels of Organization • Biome: group of ecosystems that have the same climate and dominant communities • desert, tundra, tropical rain forest • Biosphere: planet Earth

  8. Ecological Methods • Three approaches to ecological research: • Observing: Use of 5 senses to ask ecological questions • Experimenting: Used to test hypotheses • artificial environment in a lab • within natural ecosystems

  9. Ecological Methods • Modeling: Used to gain insight into complex phenomena such as the effects of global warming • may include mathematical formulas based on data collected through observation and experimentation • predictions tested by further observations and experiments

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