Chapter 2

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Chapter 2
2014-10-13 14:26:38

Chapter 2
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  1. Population
    all the members of a species that inhabit a particular geographic area at a certain time
  2. Exponential Growth
    • accelerating growth that keeps doubling itself over time; produces a "J" shaped curve when the population is graphed against time
  3. Limiting Factors
    a factor that limits the growth of a population in an ecosystem (e.g. limiting factor of bats is that they need caves to roost in)
  4. Carrying Capacity
    • the size of a population that can be supported for an infinite time by using the available resources and ecosystem services
  5. Ecological Niche
    the way an organism occupies a role in an ecosystem, including all necessary biotic and abiotic factors
  6. Predator
    an organism that kills and consumes other organisms (e.g. lynxes consume hares, the lynx is the predator)
  7. Prey
    an organism a predator will kill and consume as food (e.g. lynxes consume hares, the hare is the prey)
  8. Mutualism
    a symbiotic relationship that both species benefit from (e.g. coral and algae; the algae provides the coral with up to 90% of its nutrients and the coral provides protection for the algae)
  9. Parasite
    an organism whose niche is dependant on a close association with a larger organism (who usually becomes a host for other organisms, e.g. brain-worms use deer to lay eggs in for a more safe and efficient reproduction cycle)
  10. Competition
    two or more organisms, of the same or different species, competing for the same resources
  11. Sustainable Use
    use of a resource that does not cause long-term damage to it or the ecosystem it was obtained from
  12. Doubling Time
    the period of time required for a population to double in size
  13. Ecological Footprint
    a measure of the impact an organism or population has on the environment as determined by energy consumed, land used, and waste produced
  14. Unsustainable
    a pattern of activity that causes the function of an ecosystem to decline
  15. Sustainability
    use of Earth's resources (e.g. water, land) at levels that could be continued forever
  16. Ecosystem Services
    the benefits sustainable ecosystems provide organisms (including humans) with
  17. Desertification
    the changing of non-desert land into desert land, possibly as a result of climate change or unsustainable farm/water use
  18. Ecotourism
    a popular type of tourism, that is nature-based, sensitive to the health of an ecosystem, and involves recreational activities provided by sustainable ecosystems (e.g. a boat ride to see dolphins)