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Unit 14a Relationships, biotic, and abiotic factors

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Unit 14a Relationships, biotic, and abiotic factors

  1. 1. KEY CONCEPT Ecology is the study of the relationships among organisms and their environment.<br />
  2. 2. Ecologists study environments at different levels of organization. What are some of the different levels of organization called?<br />Ecology is the study of the interactions among living things, and between living things and their surroundings.<br />
  3. 3. Organism<br />Organism<br />An organism is an individual living thing, such as an alligator.<br />
  4. 4. Population<br />Population<br />Organism<br />Organism<br /><ul><li>A population is a group of the same species that lives in one area.</li></li></ul><li>Community<br />Community<br />Population<br />Population<br />Organism<br />Organism<br /><ul><li>A community is a group of different species that live together in one area.</li></li></ul><li>Ecosystem<br />Ecosystem<br />Community<br />Community<br />Population<br />Population<br />Organism<br />Organism<br /><ul><li>An ecosystem includes all of the organisms as well as the climate, soil, water, rocks and other nonliving things in a given area.</li></li></ul><li>Biome<br />Ecosystem<br />Ecosystem<br />Community<br />Community<br />Population<br />Population<br />Organism<br />Organism<br /><ul><li>A biome is a major regional or global community of organisms characterized by the climate conditions and plant communities that thrive there.</li></li></ul><li> Ecological research methods include observation, experimentation, and modeling.<br />Observation is the act of carefully watching something over time. Give one example.<br />Observations of populations can be done by visual surveys. What kinds of things would you observe?<br /><ul><li>Direct surveys for easy to spot species employ binoculars or scopes.
  5. 5. Indirect surveys are used for species that are difficult to track and include looking for other signs of their presence. E.g. wolf howling</li></li></ul><li>Experiments are performed in the lab or in the field.<br /><ul><li>Lab experiments give researchers more control.
  6. 6. Lab experiments are not reflective of the complex interactions in nature. Why?
  7. 7. Field experiments give a more accurate picture of natural interactions.
  8. 8. Field experiments may not help determine actual cause and effect. </li></li></ul><li>Ecologists use data transmitted by GPS receivers worn by elephants to develop computer models of the animal’s movements.<br />Computer and mathematical models can be used to describe and model nature.<br /><ul><li>Modeling allows scientists to learn about organisms or ecosystems in ways that would not be possible in a natural or lab setting.</li></li></ul><li>KEY CONCEPT Every ecosystem includes both living and nonliving factors.<br />
  9. 9. An ecosystem includes both biotic and abiotic factors. <br />Biotic factors are living things. Give three examples.<br />plants<br />animals<br />fungi<br />bacteria<br />
  10. 10. Abiotic factors are nonliving things. Give three examples. <br /><ul><li>moisture
  11. 11. temperature
  12. 12. wind
  13. 13. sunlight
  14. 14. soil</li></li></ul><li>Changing one factor in an ecosystem can affect many other factors. How – give an example. <br />Biodiversity is the assortment, or variety, of living things in an ecosystem.<br />Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. <br />
  15. 15. What is one drawback of a field experiment? <br />A. It does not reflect complex interactions. <br />B. It cannot be controlled. <br />C. It is difficult to determine cause and effect. <br />D. There are no manipulated variables. <br />
  16. 16. What is one drawback of a field experiment? <br />A. It does not reflect complex interactions. <br />B. It cannot be controlled. <br />C. It is difficult to determine cause and effect. <br />D. There are no manipulated variables. <br />Correct Answer = C<br />Which of the following is ordered correctly from largest to smallest? <br />A. organism, population, community, ecosystem, biome <br />B. ecosystem, biome, community, population, organism <br />C. biome, ecosystem, community, population, organism <br />D. biome, ecosystem, population, community, organism<br />
  17. 17. What is one drawback of a field experiment? <br />A. It does not reflect complex interactions. <br />B. It cannot be controlled. <br />C. It is difficult to determine cause and effect. <br />D. There are no manipulated variables. <br />Correct Answer = C<br />3. Which of the following is ordered correctly from largest to smallest? <br />A. organism, population, community, ecosystem, biome <br />B. ecosystem, biome, community, population, organism <br />C. biome, ecosystem, community, population, organism <br />D. biome, ecosystem, population, community, organism <br />Correct Answer = C<br />
  18. 18. What is one drawback of a field experiment? <br />A. It does not reflect complex interactions. <br />B. It cannot be controlled. <br />C. It is difficult to determine cause and effect. <br />D. There are no manipulated variables. <br />Correct Answer = C<br />3. Which of the following is ordered correctly from largest to smallest? <br />A. organism, population, community, ecosystem, biome <br />B. ecosystem, biome, community, population, organism <br />C. biome, ecosystem, community, population, organism <br />D. biome, ecosystem, population, community, organism <br />Correct Answer = C<br />
  19. 19. Review<br /><ul><li>Ecology is the study of how the living and non-living factors in an environment interact
  20. 20. Levels of organization in ecology going from general to specific = biome, ecosystem, community, population, organism
  21. 21. Observations include careful watching over time
  22. 22. Lab experimentation and field experimentation have different benefits and downfalls
  23. 23. Biotic factors are living things
  24. 24. Abiotic factors are non-living things
  25. 25. Biodiversity is important for survival of organisms in changing circumstances</li>

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