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Population
All the individuals in a species within a particular space at a particular time
Habitat
Place where an organism lives
Community
All populations of multiple species in a defined area (living) (biotic)
Ecosystem
All populations plus nonliving components. Community interacting with the environment.
Biosphere
The whole earth, soil, water, air, where all organisms are found
Ecology
Considers how organisms interact and the nonliving environment
Demographics of population
Study of the statistics of a population
Population size
Number of individuals (that contribute to the gene pool)
Population density
Number of individuals per unit area
Population distribution
Pattern of dispersal
Clumped
Random
Uniform
Resources
Living in nonliving
Limiting factors
Environmental aspects (where they can live), includes oxygen light space temp (abiotic) food sources (biotic)
Population growth
Rate of natural increase.
Number born per year/number that die per year. Immigration (enter) or emigration (leave).
Biotic potential
Highest rate of natural increase; happens when resources are unlimited
biotic potential impacts
Number of offspring per reproductive event
Chance that offspring survived to reproductive age
How often/how many reproductive events in a timeframe?
At which reproduction can happen
Disease and predators