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Lauren's Ecology
| Question | Answer |
|---|---|
| Ecology | Scientific study of interactions aomg organisms and between organisms and their environment. |
| Biosphere | Part of earth in which life exists including land, water, and air or atmosphere. |
| Species | Group of similar organisms that can breed and produce fertile offspring |
| Population | group of individuals of same species that live in the same area |
| Community | assemblage of different populations that live together in a defined area |
| Ecosystem | collection of all the organsims 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 obtains energy from the foods it consumes; also called a consumer |
| food web | netwrok of complex interactions formed by the feeding relationships among the various organisms in an ecosystem. |
| trophic level | step in a food chain or food web |
| boimass | total amount of living tissue within a given amount of trophic level |
| biogeochemical cycle | process in which elements, chemical compunds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another |
| limiting nutrient | single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem |
| weather | condition of earth's atmosphere at a particular time and place` |
| climate | average, year after year conditions of temperature and precipitation in a particular |
| greenhouse effect | natural situation in which heat is retained in earth's atmosphere by carbon dioxide, methane, water vapor, and other gases. |
| biotic factor | biological influence on organisms within an ecosystem. |
| Abiotic factor | physical, or non living, factor that shapes on ecosystem |
| niche | full range of physical and biological conditions in which an organism lives and the way the organism uses those conditions |
| logistic growth | growth pattern in which a populations growth rate slows or stops following a period of ecponential growth. |
| Carrying capacity | largest number of individuals of a population that an environment can support |
| Demography | Scientific study of human populations |
| Demographic transition | change in a population from from high birth and death rates to low birth and death rates |
| green revolution | the development of high productive crop strains and the use of modern agricultural techniques to increase yields of food crops |
| renewable resource | resource that can regenerate quickly and that is replacable |
| 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 biosphere |
| biological magnification | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
lola9595
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