Chapter 2-Populations and Sustainable Ecosystems

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Chapter 2-Populations and Sustainable Ecosystems
2015-09-26 19:04:13

This part of the grade-9 Ecology unit.
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  1. Population
    All the individuals of a species that occupy a particular geographic area at a certain time.
  2. Exponential Growth
    Accelerating growth that produces a J-shaped curve when the population is graphed.
  3. Limiting factors
    Factors that limit the growth, distribution, or amount of a population in an ecosystem.
  4. Carrying Capacity
    the number of people, other living organisms, or crops that a region can support without environmental degradation.The size of a population that can be supported indefinitely by the available resources and services of an ecosystem.
  5. Ecological niche
    An ecological niche is the role and position a species has in its environment; how it meets its needs for food and shelter, how it survives, and how it reproduces. A species' niche includes all of its interactions with the biotic and abiotic factors of its environment.
  6. Predator
    An organism that kills and eats another organism.
  7. Prey
    An organism that is consumed by a predator as food.
  8. Mutualism
    Symbiotic relationship where both organisms benefit.
  9. Parasite
    An organism whose niche is dependent on a close association with a larger host organism.
  10. Competition
    When two or more organisms compete for the same resource at the same time in the same place.
  11. Sustainable Use
    Use that does not lead to long-term depletion of a resource or affect the diversity of the ecosystem from which the resource is obtained.
  12. Doubling time
    The period of time that is required for a population to double in size.
  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.
  14. Unsustainable
    A pattern of activity that leads to a decline in the function of an ecosystem. Example: Easter Island.
  15. Sustainability
    Use of Earth's resources, including land and water, at levels that can continue forever.
  16. Ecosystem services
    The benefits experienced by organisms, including humans, that are provided by sustainable ecosystems.
  17. Desertification
    The change of non-desert land into a desert;desertification may result from climate change and unsustainable farming or water use.
  18. Ecotourism
    Tourism directed toward exotic, often threatened, natural environments, especially to support conservation efforts and observe wildlife.