Biology

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  • Created by: Megan
  • Created on: 11-04-13 16:32

B4-1

Estimating Population Sizes-

  • Population is all the organisms of one species in a habitat
  • Community is populations of different species in a habitat
  • Qudrat: square frame, study small area and scale up,
  • Capture Recapture: capture and mark and recapture, population size=(1st sample x 2nd sample) / 2nd sample marked, accuracy, changes
  • Sample size affects accuracy

Ecosystems and Distrabution of Organisms-

  • Ecosystem is all the organisms living a particular area (as well as non living (abiotic) conditions)
  • A habitat is the place where an organism lives
  • Ecosystems are self-supporting, everything is recycled within the ecosystem, the only thing outside is an energy source (sun)

 

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