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24 Cards in this Set
- Front
- Back
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Allee Effect |
A decrease in r when population gets very small |
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Positive feedback |
If the population is too low, exponential growth, |
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Dependent density |
Response of the population will change with more individuals |
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Density independent |
As something increases or decreases a rate does not change, factors that regulate population size, pushes population down |
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Population census |
Where you count every individual in that given area |
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Peterson method |
Single marking, single recapture |
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Schnable Method |
Multiple markings, multiple recaptures |
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Jolly-Seber method |
Multiple capture and recapture |
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Total population size equation |
Total=C*M/R |
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Edward Lorenz |
Meteorologists, discovered the fundamentals of chaos, butterfly effect |
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Species association |
Species living together and interacting within the same space |
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Species diversity |
The measure of the number of different species and the proportion, more complex, how many species in that given area |
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Functional groups |
The organisms that are associated together what are their function |
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Land mass |
Decrease in mass further away from the equator |
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Land mass |
Decrease in mass further away from the equator |
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Paradox Enrichment |
Increasing the food available to the prey caused the predators population to destabilize, if the nutrients increases to a certain point then it starts dropping down, competition takes effect |
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Gause |
One species dominates and one species disappears when put together, first evidence to show competition in a lab |
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Ghost of competition past |
To describe one possible reason for observed differentiations in niches. Competing species may be less fit than a species which avoids competition |
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Hutchinson |
Created a size ratio 1:3 between similar species when they were living together as compared to when they we isolated |
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Succession |
Directional change and continuos pattern of colonization and extinction at a site by populations |
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Cyclic replacement |
Repeating pattern sequence of species that replace each other |
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Frederic E Clements |
succession- deterministic, predictable like embryo logical development -> super organism, one stage paves for the way for the next |
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H.A Gleason |
No super organism, random spreading & establishment, non-equilibrium approach |
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Disturbance |
A chance event that Amy disrupt the system but will come back to equilibrium |
