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14 Cards in this Set
- Front
- Back
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What was the conclusion of the log log plot after Deevey? |
3 phases in population: 2. Agricultural Phase 3. Industrial-Medical Phase |
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Describe the cultural phase |
humans were hunters and gatherers, and prey to creatures larger than them. |
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Describe the agricultural phase |
Because agriculture became a thing, the population could grow, but our diet was constrained. |
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What did the carbon isotopes from bones in Eastern North American tell us about where we got our carbon (food) from? |
Staple foods were corn and grasses (carbon level 4). We had low dental problems until maze became available, because of the sugar in maze, tooth decay became a problem. |
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Describe the industrial-medical phase |
Health knowledge developed: vaccines intented, antibiotics, war times demanded medicine, high mortality rate of common diseases, etc. Fertilizers and pesticides were invented. |
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Equation for population |
N(sub t+1) =N(sub t) + B - D + I - E |
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N(sub t) |
existing population |
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N(sub t +1) |
population at 'next step' |
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B |
Birth Rate |
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D |
Death Rate |
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I |
Immigration Rate |
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E |
Emigration rate |
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Carrying Capacity |
The carrying capacity of a biological species inan environment is the population size of thespecies that the environment can sustainindefinitely, given the food, habitat, water andother necessities available in the environment. |
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Why did the House Sparrow populations at Kensington Garden deplete? |
Mostly due to low survival until adulthood because they did not have enough plant material or meal worms in their diet= low juvenile survival |
