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Ecology

TermDefinition
abiotic nonliving factor such as air, water, sun
biotic living factor in the environment such as plants and animals
homeostasis maintaining a relatively stable environment; balance
organism/species a living thing composed of organ systems that can breed and produce offspring
population a group of one species that lives in the same area such as a group of frogs
community a collection of two or more populations in one area such as grass, rabbits, and snakes
ecosystem all the living and nonliving things in an area
biosphere Earth
succession a gradual change in a community that follows a disturbance
primary succession succession that occurs when no soil is present ex. volcano
secondary succession succession that follows a disturbance but does not remove the soil ex. wildfire
pioneer species the first species to populate and area. Ex. is lichen and moss
climax community a community which has been stable for many years
nitrogen fixation BACTERIA changes the nitrogen into a form that living things can use
competition occurs when organisms fight for the same resource and the same time ex. food, water, shelter
predation one organism captures and eats another
symbiosis two different species live close together
mutualism both species benefit from the relationship ex. bees and flowers
commensalism one benefits and the other is not helped nor harmed ex. barnacle and whale
parasitism one benefits and the other is harmed ex. dog and tick
autotroph/producer an organism that makes its own food through photosynthesis ex. plant
heterotroph/consumer an organism that relys on others for food and must eat. ex. animal
herbivore eats only plants
omnivore eats both plants and animals
carnivore eats only meat
decomposer breaks down dead or organic matter ex. bacteria and mushrooms
10% Law the amount of energy passed onto the next energy level; the rest is lost as heat
Created by: JMHSBIO