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Chapter 40 Review
Terms in this set (21)
What are global climate patterns determined by?
Input of solar energy & Earth revolving around the sun
What do climographs show?
That temperature and precipitation are correlated with biomes
What is affected by the angle of the sun, bodies of water & mountains?
What biomes are typically named for physical factors, climate factors & vegetation?
What is a biome?
a major life zone characterized by vegetation type or physical environment
What biomes are characterized by physical environment rather than climate?
What is an abrupt temperature chang ethat separates upper & lower layers of water?
Ecologists want to know _______ and _____ species occur where they do.
What limits the distribution of species? (3)
dispersal, abiotic and biotic factors
Compare abiotic and biotic factors & give an example of each.
Abiotic= non living; temperature
Biotic= living; an organism
What is dispersal?
the movement of individuals or gametes away from their area of high population density
What reflects birhts, deaths, immigration and emigration? It also influences dispersion.
Compare immigration and emigration.
Immigration: new individuals come into a population from other areas
Emigration: the movement of individuals out of a population
What is the study of vital stats of populations and how they change over time?
What is the plot of the proportion or numbers in an group still alive at each age?
a survivorship curve
Ex. Lifetime of a mussel, squirrel & human
Explain exponential growth.
When a population experiences such ideal conditions that it can increase in size by constant proportions.
What is the maximum population size a particular environment can sustain?
What is the per capita rate of population approaches 0 as the population size nears carrying capacity?
logistic population growth
What are evolutionary outcomes in development, physiology & behavior?
Life history traits
Any characteristic that varies with population density is?
density dependent (k selection)
Any characteristic not affected by a population is?
density independent (r selection)
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