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Prin. of Ecology

Biology - Glencoe Chap 2

QuestionAnswer
abiotic factor non-living parts of the environment, EX: Wind, water, sun temperature
biological community made up of populations in a certain area and at a certain time
Biosphere part of the earth that supports life. Extends from the bottom of the sea to high in the atmosphere
Biotic factor all living organisms that are found in an environment
commensalism symbiotic relationship. One species benefits, the other is not harmed or hurt.
ecology study of interrelationships between an organism and its environment.
ecosystem interactions between a population and its community. Includes abiotic as well as biotic factors
habitat Where an organisms lives
mutualism symbiotic relationship. Both species benefit
niche where a species fits in to its environment. Includes all of the biotic and abiotic factors necessary for survival and reproduciton
parasitism symbiotic relationship. One species benefits, the other is harmed.
population a group of organisms of the same species in the same place at the same time.
symbiosis permanent associations between different species. parasitism, mutualism, commensalism
autotroph Get their energy from the sun to produce their own food.
biomass total mass of all living matter in a given area.
decomposer organisms such as fungi and bacteria that break down and absorb nutrients from dead organisms.
food chain simple model that shows how matter and energy move through an ecosystem.
food web shows all possible feeding relationships at each trophic level in a community.
heterotroph organisms that can not make their own food so obtain it from feeding on other organisms.
trophic level a feeding step in the process of moving energy and nutrients through an ecosystem.
Created by: jljohnson404
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