Term
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Definition
| birth rate, death rate, immigration, emigration |
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Definition
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Term
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Definition
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Term
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Definition
| # of outside (same speices) organisms coming into the pop |
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Term
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Definition
| # of inside (same speices) organisms leaving the pop |
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Term
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Definition
| spatial arrangement of organisms in an area |
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Term
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Definition
| population of organisms spaced arbitrarily w/ no organization or intention (free-floating larvae); least common arrangement |
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Term
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Definition
| spaced evenly from one another; common w/ limited resources or territorial animals (wolves) |
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Term
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Definition
| most common distr bc they clump around a necessary resource; herds |
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Term
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Definition
| # of individuals in a pop/area unit^2; high = high competition; low = decrease in chances of finding a mate |
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Term
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Definition
| # of organisms in each range of a population; shows if pop is stabilizing/growing/declining |
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Term
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Definition
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Term
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Definition
| pop increases by fixed percentage per unit of time; j-curve |
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Term
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Definition
| the max # of organisms that an environment can support indefinitely |
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Term
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Definition
| food, shelter, water, mates; anything an organism depends on for survival |
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Term
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Definition
| all limiting factors acting on the pop |
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Term
| density-dependent limiting factors |
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Definition
| rely on the density of a pop |
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Term
| density-independent limiting factors |
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Definition
| don't depend on density of a pop to limit things |
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Term
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Definition
| S-curve; exponential pop as it reaches carrying capacity; generally theoretical; realistic curves fluctuate above K indefinitely |
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Term
| K-selected Reproductive Strategies (Type III) |
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Definition
| few offspring; long life; raise their young; large; low biotic potential |
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Term
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Definition
| lots of offspring; short-lived; young left on their own; how biotic potential |
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Term
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Definition
| inbetween R & K reproductive strategies |
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Term
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Definition
| began 10k yrs ago; people began growing crops and raising livestock; easier to get necessities; more kids, lived longer |
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Term
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Definition
| 1700s; urban living; improved sanitation & healthcare; people lived longer; factories |
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Term
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Definition
| Impact on Environ = Pop x Affluence x Tech (sensitivity of environ can be factored in as well) |
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Term
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Definition
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Term
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Definition
| High DR/BR bc poor medical care, high disease, starvation; pop stable |
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Term
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Definition
| DR starts to decline bc of medicinal advancements & better food production; BR stays high; pop inc |
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Term
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Definition
| BR stabilize bc people work outside home (not farming); DR stay stable; pop growth slows; birth control more common |
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Term
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Definition
| BR & DR low and stable; stabilize/small decline in pop |
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