Chapter #2; Glossary Terms

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Chapter #2; Glossary Terms
2012-10-30 19:54:43

Chapter 2 Glossary Terms
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  1. Population
    Population is all of one specific species that occupies a particular geographic area at a certain time. For exapmle, the population of humans in Canada during 2011 was around 34 million. 
  2. Exponential Growth
    Exponential Growth is accelerating growth that produces a J-shaped curve when the population is a graphed against time. It usually occurs only under-special conditions such as introduction to a new habitat with unlimited resources, and only for a short time in nature. Limiting factors restrict exponential growth.
  3. Limiting Factors
    A limiting factor is a factor that limits the growth, distribution or the amount of population in an ecosystem. 
  4. Carrying Capacity
    The carrying capacity of a population is the size of the population that can be supported indefinitely by the available resources and services of an ecosystem. Population size is at equillibrium at carrying capacity and when a resource is used at a pace exceeding it's carrying capacity, the population size will decrease to a new equillibrium. 
  5. Ecological Niche
    An ecological niche is the way that an organism occupies a position in an ecosystem. 
  6. Predator
    A predator is an animal that kills and consumes another animal. For example, an owl is a predator to mice because they kill them, and then eat them.
  7. Prey
    An organism that is eaten as food by a predator. 
  8. Mutualism
    Mutualism is a symbiotic relatioship between two species in which both species benefit from the relationship. For example, the relationship between algae and coral.
  9. Parasite
    A parasite is an organism whose niche is dependant on a close association with a larger host organism. 
  10. Competition
    The symbiotice relationship between two species where both organisms compete for the same resource. This can be a limiting factor for an ecosystem because the organisms spend too much energy competing so ther is not enough energy left for reproducion. 
  11. Sustainable Use
    Use that does not lead to long-term depletion of a resource or affects the diversity of the ecosystem from whcih the resourse is obtained is called sustainable use. 
  12. Double Timing
    Double timing is the amount of time it takes for a popultion to double in it's size.
  13. Ecological Footprint
    The measure of the impact an idividual or a population on the environment in terms of energy consumption, land use, and waste prouction is called an ecological footprint.  
  14. Unsustainable
    When a pattern of activity leads to a decline in the function of an ecosystem, the ecosystem is said to be unsustainable. 
  15. Sustainability
    The sustainability of an ecosystem is the use of Earth's resources, including land and water, at levels that can continue forever. 
  16. Ecosystem Services
    An ecosystem service is the benefit that is experienced by organisms, including humans, that are provided by sustainable ecosystems. 
  17. Desertification
    Desertification is the change in non desert land into desert; desretification may result from climate change and unsustainable farming or water use. 
  18. Ecotourism
    Ecotourism is a form of tourism that is sensitive to the health of an ecesystem and involves recreational activities provided by sustainable ecosystem.