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Understanding Ecosystem Organization and Interactions in Ecology

This review covers fundamental concepts of ecology, including levels of organization from species to ecosystems, abiotic factors like soil type, and food web dynamics such as trophic levels and consumer relationships. It evaluates different interactions, including commensalism between cowbirds and bison, and addresses ecological processes like nitrogen fixation. The review also discusses the recovery of ecosystems post-natural disasters, identifying grass and lichen as pioneering organisms. Additionally, it highlights the significant event of the 1980 Mount St. Helens eruption in Washington State.

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Understanding Ecosystem Organization and Interactions in Ecology

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  1. Ecology Review

  2. Question 1- Organization • List the following levels of organization from SMALLEST to LARGEST • A- Ecosystem • B- Species • C- Community • D- Population

  3. Answer 1 • Species • Population • Community • Ecosystem

  4. Question 2 • Which of the following is an abiotic factor of an ecosystem? • A- The number of predators • B- The amount of producers • C- The amount of herbivores • D – The type of soil

  5. Answer 2 • D- the type of soil • Abiotic factors are the NON-Living factors of an ecosystem

  6. Question 3 • Steps in a food web are called: • A- Food levels • B- Consumer levels • C- Trophic levels • D- Organism levels

  7. Answer 3 • C- Trophic levels

  8. Question 4 List 3 secondary consumers in the food web above

  9. Answer 4 • Owl • Bird • Wild Cat

  10. Question 5 List all Apex predators in this food web

  11. Answer 5 • Lioness • Eagle

  12. Question 6 • Cowbirds follow bison and eat small insects that the bison make fly up while walking through the grass. • What type of relationship is this between the cowbirds and the bison?

  13. Answer 6 • Commensalism • The cowbird benefits from the food the bison kicks up • The bison is unaffected by the cowbirds

  14. Question 7 • The falling of water from clouds to the ground is know as…

  15. Answer 7 • Precipitation • Can be rain, snow, sleet, hail etc.

  16. Question 8 • What are two sources of nitrogen fixation?

  17. Answer 8 • Bacteria • Lightning

  18. Question 9 • Which is most likely to be the first organism to return to an ecosystem after a natural disaster? • A- Grass • B- Mammals • C- Lichen • D- Reptiles

  19. Question 10 • What is the name of the volcano in Washington state that famously erupted in 1980, killing 57 people, destroying hundreds of miles of forests and causing 1.1 billion dollars of damage?

  20. Answer 10 • Mount St. Helens

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