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mcleod ecology

seventh grade biology ecology vocab

ecology study of the interactions between organisms and their environment
biotic the living part of the environment living organisms
abiotic the parts of the environment that are non-living
environment made up of biotic and abiotic parts
organisms anything that can independently carry out life processes
population a group of individuals of the same species that live together in the same area at the same time
community all the populations of different species that live in and interact in an area all biotic factors
ecosystem a community of organisms and their nonliving environment both biotic and abiotic
biosphere the part of the Earth where life exists
autotrophs/producers organisms that make their food using sunlight or chemicals
heterotrophs/consumers organisms that eat other organisms to get food
herbivore eats only plants
carnivore eats only meat
omnivore eats both plants and meat
scavenger animal that feeds on bodies of dead organisms
decomposer organism that gets energy from decomposed organisms like mushrooms and bacteria
food chain shows the way energy flows from one organism to the next
food web shows many energy pathways in an ecosystem
energy pyramid a representation of energy lost at each level of the food chain
habitat environment an organism lives in
niche an organism's way of life in its ecosystem
limiting factors populations cannot grow indefinitely because the environment contains only so much food, water, living space and other needed resources
carrying capacity the largest population that a given environment can support over a long period of time.
competition two or more individuals or populations try to use the same limited resources such as food, water, shelter, space, sunlight
predator organisms that eat the prey
prey organism that is eaten
symbiosis a close, long-term association between two or more species
mutualism both organisms benefit
commensalisms one organism benefits and the other is unaffected
parasitism one organism benefits while the other is harmed
coevolution a long-term change that takes place in two species because of their close interactions with one another
Created by: f mcleod