Ecosystems 2

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  1. ecotourism
    • a form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable ecosystems.
    • eg, hiking, biking,whale watching
  2. competition
    when two or more organsims compete for the smae resource in the same location at the same time.
  3. sustainible use
    use that does not lead to long-term depletion or a resource or affect the diversity of the ecosystem from which the resource is obtained.
  4. limiting factors
    • a factor that limits the growth, distribution or amount of a population in an ecosystem.
    • (not enough resources)
  5. ecosystem services
    • the benefits experienced by organisms, including humans, that are provided by sustainable ecosystems.
    • Pollination, cycling of nutrients
  6. population
    All the individuals of a species that occupy a particuar geographic area at a certain time.
  7. doubling time
    the period of time that is required for a population to double in size.
  8. carrying capacity
    the size of a population that can be supported indefinetly by the available resources and services of an ecosystem.
  9. prey
    • An organism that is eaten as food by a predator.
    • e.g. mouse is hunted by eagle
  10. desertification
    the change of non-desert land into a desert, which may result from climate change or from unsustainable farming or water use.
  11. sustainibility
    use of earths resources, including land and water, at levels that can continue forever.
  12. unsustainible
    • a pattern of activity that leads to a decline in the function of an ecosystem.
    • (using up too many resouces)
  13. ecological footprint
    • a measure of the impact of an individual or a population on the environment in terms of energy consumption, land use and waste production.
    • measured in hectares/person
  14. ecological niche
    The way in which an organism occupies a posistion in an ecosystem, including all the necessary biotic and abiotic factors.
  15. mutualism
    • a symbiotic relationship between two species in which both species benefit from the relationship.
    • eg. Algae in coral
  16. predator
    • An organsim that kills and consumes other organisms.
    • e.g. eagle eats mouse
  17. exponential growth
    Accelerating growth that produces a J shaped curve when the population is graphed against time.
  18. parasite
    • An organism whose niche is dependant on a close association with a larger host organism.
    • eg. larval worm in a white-tailed deer
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Ecosystems 2

chapter 2
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