Population Cycle. H. Biology. Population Ecology. Population ecology = study of populations in an environment, including environmental influences on density and distribution, age structure, and population size
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Population ecology = study of populations in an environment, including environmental influences on density and distribution, age structure, and population size
Population = group of same individuals of a single species living in the same general area at the same time and can interbreed
Ex: What is the density of trees in 1 km2 in there are 1000 trees in 50 km2?
1000 trees = 20 trees
50 km2 km2
Birth Rate – Death Rate = Rate of natural increase (b - d = r)
1. Immigration- movement of individuals into a population
2. Emigration- movement of individuals out of a population
3. Density-dependent factors- Bioticfactors in the environment that have an increasing effect as population size increases
- Ex. Disease, competition, parasites
4. Density-independent factors-Abioticfactors in the environment that affect populations regardless of their density
- Ex. Temperature, storms, habitat destruction,
Limiting factor-any biotic or abiotic factor that restricts the existence of organisms in a specific environment.
EX.- Amount of water, Amount of food, Temperature
Exponential Growth (J-shaped)
- Ex: Amount of water, Amount of food, Temperature