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eco taylor
bio note cards sept. 27 2011
| Question | Answer |
|---|---|
| ecology | scientfic study of interactions among organisms and between organisms and their enviroment |
| biology | science that seeks to understand the living world |
| species | group of similar organisms that can breed and produce fertile offspring |
| population | group of individuals of the same species that live in the same area |
| community | assemblage of different populations that live together in a defind area |
| ecosystem | collection of all the organisms that live in a particular place, together with their nonliving environment |
| autotroph | organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer |
| heterotroph | organism that obtain energy from the foods it consumes; also called a consumer |
| food web | network of complexz interactions formed by the feeding relationships among the various organisms in an ecosystem |
| trophic level | step in a food chain or food web |
| biomass | total amount of living tissue within a given trophic level |
| biogeochemical cycle | process in which elements chemical compounds and other forms of matter are passed form one organism to another and from one part of the biospehere to another |
| limiting nutrient | single nutrient that either is scarce or cycles very slowly; limiting the growth of organisms in an ecosysytem |
| weather | condiction of earth's atmospehere at a particular time and place |
| climate | average, year-after-year condictions of tempertaure and precicptation in a particular region |
| green house effect | natrual sistuation in which heat is retained in earths atmosphere by carbon dioxide methane water vapor and other gases |
| biotic factor | biological influence on organisms within an ecosystem |
| abiotic factor | phycial or nonliving factor that shapes an ecosytem |
| niche | full range of phycial and biological condictions in which an organisms lives and the way in which the organism uses those conditions |
| logistic growth | growth pattern in which a populations's growth rate slows or stopes following a period of exponential growth |
| carrying capacity | largest numbewr of indivuadals of a population that a given environment can support |
| demography | scientific study of human populations |
| demographic transition | change in a population from high birth and death rates to low birth and death rates |
| green revolution | the development of highly productive crop strains and the use of modern agriculture techniques to increase yeilds of food crops |
| renewable resource | resources the can regenerate quickly and that is replaceable |
| pollutant | harmful material that can enter the biosphere through the land, air , or water |
| biodiversity | biological diversity; the sum total of the variety of organisms in the biospehre |
| biological magnification | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or a food web |
Created by:
savannahtaylor
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