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Bio 1B SG6P1

Population a group of organisms of the same species living in the same place
Population density measures the number of individual organisms living in a defined space
Survivorship curve a graphic representation of mortality patterns
exponential growth Population grows without limit
logistic growth Population grows quickly at first and then levels off
carrying capacity The theoretical maximum population that a given environment could support.
limiting factors aspects of the environment that limit the size a population can reach
biotic living; food source, mates
abiotic nonliving; water, temperature
density dependent have a bigger impact on more dense populations, and are triggered by an increase in population size; ex. competition, predation, parasitism, disease
density independent regulate population growth regardless of size or density. nearly all species in an ecosystem are affected equally; ex. weather changes, pollution, natural disasters
list the factors that contribute to a high population density vs a low population density high pop density = birth, immigration low pop density = death, emigration
explain the difference between logistic and exponential population growth exp pop growth: resources are unlimited, resulting in a J-shaped curve. In logistic growth, pop expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.
cite specific examples of each type of limiting factor Some examples of limiting factors are biotic, like food, mates, and competition. Others are abiotic, like temperature & the amount of sunlight available in an environment.
SKETCH AND LABEL an example of the different types of survivorship curves. briefly describe each one. Type 1: Late loss; heavy parental care; Ex. Humans Type 2: Constant loss; mortality unaffected by age; Ex. some birds, rodents Type 3: Early loss; produce lots of offspring at once and many die right away; Ex. fish, mosquitoes
SKETCH AND LABEL a picture of the three types of dispersion patterns. Random, Uniform/Even, Clumped
Created by: jewlsasterr
Popular Physics sets




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