Biology 4


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Biology 4

  1. 1. What shapes an Ecosystem? 4.2<br />
  2. 2. Biotic Factor<br />Biological influence on organisms within an ecosystem.<br />
  3. 3. Abiotic Factor<br />Physical, or nonliving, factor that shapes an ecosystem.<br />
  4. 4. Habitat <br />The area where an organism lives, including the biotic and abiotic factors that affect it.<br />
  5. 5. Niche<br />Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.<br />
  6. 6. Resource <br />Any necessity of life, such as water, nutrients, light, food, or shape. <br />
  7. 7. Competitive exclusion principle <br />Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time. <br />
  8. 8. Predation<br />Interaction in which one organism captures and feeds on another organism.<br />
  9. 9. Symbiosis<br />Relationship in which two species live closely together.<br />
  10. 10. Mutualism<br />Symbiotic relationship in which both species benefit from the relationship.<br />
  11. 11. Commensalism<br />Symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed.<br />
  12. 12. Parasitism<br />Symbiotic relationship in which one organism lives in or on another organism and consequently harms it. <br />
  13. 13. Ecological Succession<br />Gradual change in living communities that follows a disturbance.<br />
  14. 14. Primary Succession <br />Successionthat occurs on surfaces where no soil exists.<br />
  15. 15. Pioneer Species <br />First species to populate an area during primary succession.<br />
  16. 16. Secondary Succession<br />Succession following a disturbance that destroys a community without destroying the soil.<br />
  17. 17. Key Concept<br />How do biotic and abiotic factors influence an ecosystem?<br />Together, biotic and abiotic factors determine the survival and growth of an organism and the productivity of the ecosystem in which the organism lives.<br />
  18. 18. Key Concept<br />What interactions occur within communities?<br />Community interactions, such as competition, predation, and various forms of symbiosis, can powerfully affect an ecosystem.<br />
  19. 19. Key Concept<br />What is ecological succession?<br />Gradual change in living communities that follows a disturbance.<br />