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13 Cards in this Set
- Front
- Back
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four general processes that regulate a population |
births, immigration, deaths, emigration |
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exponential growth curve |
b>d larger pop. gets, more individuals there are to reproduce
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logistic growth curve |
population size is limited by carrying capacity, k, due to limiting factors |
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environmental resistance to population growth |
• Light, nutrient and water supply• Competition for space• Predation• Disturbance frequency and intensity |
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does carrying capacity remain same? |
No, weather effects for example |
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factors that determine how fast a population can potentially grow? |
1. Age of first reproduction2. Frequency of reproduction3. Ave. number offspring produced4. Length of reproductive lifespan5. Death Rate |
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density independent |
limiting factors unaffected by pop. size, disturbances, non-infectious disease |
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density dependent factors |
disease, predation, competition |
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3 ways pop. can be arranged |
clumped, uniform, random-environmental conditions |
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r strategy |
RRRapid growth, small bod, single rep. event, weedy&early succession species |
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k strategy |
slow growth, few offspring, large bod, late succession & perennial |
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four characteristics of populations: |
Size: number of individuals making up its genepool Density: Number of individuals per unit of area(e.g., 20/hectare) Age Structure: relative proportions ofindividuals of each age Distribution: Pattern in which individuals aredispersed in a specific area |
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examining age class of trees useful |
for determining pop. growth in future |
