Flash Cards

science class/McClendon/ecology

Term Definition
Ecology the study of how living and nonliving things interact in an ecosystem
biotic living parts of an ecosystem
abiotic nonliving parts in an ecosystem
5 levels of environmental organization organism, community, population, ecosystem, biosphere,
organism an individual animal, plant, or single celled life form
population all the members of one species in a particular area
community all the different populations that live together in an area
ecosystem all living and nonliving things that interact in an area
biosphere regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
producer/autotroph an organism that is able to form from nutritional organic substance from simple inorganic substances
consumer/heterotroph an organism deriving it nutritional requirements from complex organic substances
herbivore animal that feeds on plants
carnivore animal that feeds on flesh
omnivore animals that eats food of both plants and animal origin
scavenger animals that feed on carrion, dead plant material, or refuse
decomposer an organism that decomposes organic material
food web a system of interlocking and independent food chains
food chain a series of organisms each dependent on the next as a food source
energy pyramid a graphical model of energy flow in a community
limiting factor environmental condition that limits the growth of an organism or population in an ecosystem
carrying capacity number of living organisms that a region can support without environmental degradation
predator an organism that does the killing
prey an animal that is hunted and killed by another for food
predator adaptions an adaption prey uses in chance of survival
prey adaptions adaptions predators and prey use to obtain food or avoid being eaten
symbiosis relationship between two species where only one benefits
mutualism a relationship that both species benefit
commensalism a relationship where one organism benefits and the other goes unharmed
parasitism a relationship when one organism (parasite) harms the host

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