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ecosystem all the living and nonliving things in an area that interact with each other
autotroph any organism that can create its own food from inorganic materials
heterotroph an organism that cannot create its own energy and must instead rely on consuming nutrients from other organisms
producers an organism that makes its own food; an organism that does not consume other plants or animals
primary consumers (in the food chain) an animal that feeds on plants
secondary consumers (in the food chain) a carnivore that feeds only upon herbivores.
decomposers organisms which carry out the process of decomposition by breaking down dead or decaying organisms
herbivores an animal that consumes only plants
carnivores an animal that eats only other animals
omnivores an animal that eats plants as well as other animals
population the group of organisms of the same species living in the same area
community a group of different populations that live together and interact in an environment
density an object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space
limiting factor an environmental factor that tends to limit population size.
food chain a model that shows one set of feeding relationships among living things
food web a model that shows many different feeding relationships among living things
predator an animal that hunts and eats another animal
prey an animal that is hunted and eaten by another animal
organism any individual living thing
succession a number of persons or things following one another in order or sequence.
energy pyramid a model that shows the available amount of energy in each trophic layer in an ecosystem
competition the rivalry offered by a competitor
mutualism a relationship between two species of a plant, animal, or fungus in which one lives off the other and both organisms benefit
symbiosis the living together of two dissimilar organisms, as in mutualism, commensalism, or parasitism.
coexistence to exist together or at the same time.
cooperation an act or instance of working or acting together for a common purpose or benefit; joint action.
primary succession The ecological succession of plant and animal communities in a disturbed area where no topsoil exists, as on a new lava flow.
secondary succession The ecological succession of plant and animal communities in a disturbed area where topsoil has been retained, as in an area that has been recently burned by fire.
Terrestrial relating to the earth or those who live there.
taiga a large naturally occurring area of land with largely evergreen forest vegetation found in northern sections of the Northern Hemisphere
tundra extremely cold climate located near the North and South Poles and on the tops of mountains; receives very little precipitation and has no trees
deciduous forest a forest containing trees that lose their leaves each year
grasslands an area of land covered mostly with grass with few bushes or trees
tropical rain forests A forest with high rate of precipitation and high humidity, usually located near the equator.
deserts an area that gets little precipitation and has very little vegetation
aquatic relating to water
Created by: rany22m