Science - Unit 4 Ecology chapter 2

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Author:
McKaelaC
ID:
275725
Filename:
Science - Unit 4 Ecology chapter 2
Updated:
2014-05-31 09:27:48
Tags:
science ecology
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science,ecology
Description:
science glossary terms
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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 against time
  3. Limiting factor
    • a factor that limits the growth distribution, or amount of population in an ecosystem
    • eg. fewer resources, not enough of the nutrients needed to survive
  4. Carrying capacity
    the size of a population that can be supported indefinitely by the available resources and services of an ecosystem
  5. Equilibrium
    the balance between opposing forces
  6. Urban sprawl
    the growth of relatively low-density development on the edges of urban areas
  7. Ecological niche
    • the way that an organism occupies a position in an ecosystem, including all the necessary biotic and abiotic factors
    • eg. brown bat
    • biotic niche - insects it eats, competitors, predators
    • abiotic niche - places for roosting and hibernation, time of night it hunts, airspace it flies, temperature it tolerates
  8. Bog
    • a type of wetland in which the water is acidic and low in nutrients
    • and all plants are carnivores
  9. Predator
    • an organism that kills and consumes other organisms
    • eg. lynx, wolves
  10. Prey
    • an organism that is eaten as food by a predator
    • eg. bunnies, mice
  11. Mutualism
    • a symbiotic relationship between two species in which both species benefit from the relationship
    • eg. coral and algae
    • coral gives algae protection, nutrients and carbon dioxide for photosynthesis
    • Algae gives coral 90% of it's energy requirments
  12. Parasite
    • an organism whose niche is dependent on a close association with a larger host organism
    • eg. brainworm needs white-tailed deer
  13. 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
  14. Doubling time
    the period of time that is required for a population to double in size
  15. 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
    • eg. in 2002 Canada's footprint was ~7 which is quite a bit above the global average
  16. unsustainble
    a pattern of activity that leads to a decline in the function of an ecosystem
  17. sustainable
    use of Earth's resources, including land and water, at levels that can continue forever
  18. Ecosystem services
    the benefits experienced by organisms, that are provided by sustainable ecosystems
  19. Desertification
    the change of non-desert land into a desert; desertification may result from climate change and unsustainable farming or water use
  20. Watershed
    an area of land over which the run-off drains into a body of water
  21. ecotourism
    • a form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable¬† ecosystems
    • eg. snowshoeing, bird watching

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