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principles of Ecolog


Biosphere: portion of earth that supports life
Biotic factors living organisms
abiotic factors nonliving parts of environment
examples of biotic factors trees, fish, amoeba
examples of abiotic factors air, temperature, water,light
population number of organisms of same species in an area
biological community group of species that interact
Ecosystem species and the environment
Biome large region with a specific type of climate
Habitat where organisms live
Niche each organism's role or job
Symbiosis organisms that depend on each other for survival
Mutualism relationship in which both organisms benefit
Commensalism relationship in which one organism benefits and the other neither benefits nor is harmed
parasitism relationship in which one organisms benefits and the other is harmed but not killed
Autotroph organism that captures the sun'e energy and makes it's own food
heterotroph organism that gets energy by consuming other organizms
Herbivore eats plants
Carnivore eats meat
omnivore eats plants and animals
Trophic level each step in a food chain or web
Food chain simple model that shows one path of energy flow
Food Web complex model with many paths of energy flow
biomass total amount of organisms in an area
Ecology study of interactions between organisms and the environment
competition when 2 or more organixms occupy the same niche
resources that create competition mates, food, space, water
predator eats other organisms
prey eaten by other organisms
sun where all energy comes from in the beginning
decomposer breaks down dead organisms
pyramid of energy level of energy available - 90% lost each step in form of heat
pyramid of biomass biomass decreases at each level
pyramid of numbers population decreases each level
Created by: cboula
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