Ecology lab midterm

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zzto
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175229
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Ecology lab midterm
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2012-10-03 11:21:55
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Ecology lab midterm
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Ecology lab midterm
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  1. Mark and Recapture
    • Sources of error
    • Human interference
    • Nature (i.e. genetic drift)
    • Small sample size
  2. Anticipated population size=>
    necessary sample size
  3. What is a species?
    Members of populations that either produce viable offspring or have the potential to do so
  4. Population and community
    • Population: Group of a single species living in the same area
    • Communities: Group of interacting organisms sharing the same environment
  5. Lincoln-Peterson method
    the two visits to the study area are close enough in time so that no individuals die, are born, move into the study area(immigrate) or move out of the study area (emigrate) between visits. The model also assumes that no marks fall off animals between visits to the field site bythe researcher, and that the researcher correctly records all marks.
  6. Seine

    Water column community
  7. Kick Nets

    Benthic community
  8. YSI

    • Temperature
    • Dissolved oxygen
  9. TDS Pens
    • Salinity
    • pH
  10. Secchi disk
    • Visbility/turbidity
    • depth
  11. Water quality parameters
    -Dissolved Oxygen (DO)-Nitrates-Salinity -Temperature-Turbidity -Flow-pH
  12. Know some common water quality issues and what they cause
    • (low DO, eutrophication/runoff)
    • Agricultural runoff
    • Deforestation
    • Introduced species
    • Other point source pollution
    • Watershed protection
  13. Long term vs. short term
    Replication and longer observation should mean greater accuracy
  14. Characteristics of a wetland
    • Delineation is marked area where characteristics of wetland are met
    • Plants adapted for saturated soil conditions
    • Drainage pattern that results in saturated soil
    • Poorly drained soil with organics and mineral material in top 12 inches of soil
  15. Plant succession
    The newcomers will, in turn, establish conditions that no longer favor them but promote the growth of still other species.
  16. Field vs. controlled advantages/disadvantages
    • More realistic, but uncontrollable factors
    • Environmental noise (ditch)
  17. What is phenotypic plasticity?
    ability of an organism to change its phenotype in response to changes in the environment.
  18. What is phenotypic plasticity?
    • ability of an organism to change its phenotype in response to changes in the environment.
    • Changes in the expression of genes Morphology vs. environment
    • Direct effect from environment i.e. Lack of nutrients => smaller sizeAdaptive responses Based off cues
  19. Null hypothesis**
    • You can fail to reject, not accept
    • Alternative hypothesis
    • If you reject null hypothesis, move forward with alternative
  20. standard deviation
    squareroot of variance

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