Science Chapter 2

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  1. Population
    A group of organisms of one species that lives in the same place at the same time
  2. Exponential Growth
    • Occurs only under special conditions, such as introduction to a new habitat with unlimited resources, only for a short time in nature.
    • -When there are no limiting factors for the population
  3. Limiting Factors
    • Limiting factors restrict exponential growth.
    • Limited resources such as water or food where there is not enough to support the population.
  4. Carrying Capacity
    • Size of population that can be supported by the resources and conditions of the ecosystem.
    • When resources are used at a pace exceeding the ecosystems carrying capacity, population will decrease to a new equilibrium(a state in which opposing forces or influences are balanced.)
  5. Ecological Niche
    • The place or function of a given organism within its ecosystem.
    • An organisms niche includes resources they use, abiotic limiting factors that restrict how it can survive, and biotic relationships that is has with other species.
  6. Predator
    • An organism that kills and consumes other organisms.
    • e.g. bird eats worm, bird is the prey
  7. Prey
    • An organism that is eaten as food by a predator.
    • e.g. worm is eaten by bird, worm is the prey
  8. Mutualism
    • the symbiotic relationship between two in which both species benefit from the relationship.
    • e.g. algae and coral
    • -algae provides coral with up to 90% of its energy, and coral provides algae with protection, nutrients, and CO2
  9. Parasite
    • An organism whose niche is dependent on a larger host organism.
    • Parasite usually benefits, and larger host is usually hurt.(Symbiotic relationship in which one species benefits and the other is hurt)
  10. Competition
    • When two organisms compete for the same resource, at the same time and location.
    • e.g. flowers and weeds.
  11. Sustainable Use
    • Use of a resource that does not cause long term depletion or affect the diversity of the ecosystem from which it was obtained.
    • e.g. not over using a resource to the point where it hurts the ecosystem
  12. Doubling Time
    Period of time that is required for the population to double
  13. Ecological Footprint
    • Measure of impact that an individual or population has on the environment
    • e.g. energy consumption, land use, and waste production.
  14. Unsuitability
    A pattern of activity that leads to a decline in the function of an ecosystem.
  15. Sustainability
    • Use of Earths resources, including land and water, at levels that can continue forever.
    • Only using the amount you need
  16. Ecosystem Services
    • Benefits experienced by organisms that are provided by sustainable ecosystems.
    • e.g. provision of food and clean water, cycling of nutrients, balance of process, etc
  17. Desertification
    • Change of non desert areas into desert.
    • occurs when forests are cut down-annual precipitation drops- climate gets hotter and drier.
  18. Ecotourism
    • Tourism that is sensitive to the health of an ecosystem, involves recreational activities provided by sustainable ecosystems.
    • e.g. fishing, boat trips, etc
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Science Chapter 2
2014-09-23 21:58:13

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