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ecology maxwell
flash cards
| Question | Answer |
|---|---|
| ecology | scientific study of interactions among 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 the 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 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 obtains energy from from the foods it consumes; also called a consumer |
| food web | network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem |
| trophic level | step in a food chain or 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 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 amount of 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 region |
| green house effect | natural situation in which heat is retained in earth's atmosphere by carbon dioxide, methane, water vapor, and other gasses |
| biotic factor | biological influence on organisms within an ecosystem |
| abiotic factor | physical, or nonliving, factor that shapes an ecosystem |
| niche | full range of physical and biological conditions in which an organism lives and the way in which the organisms uses those conditions |
| logistic growth | growth pattern in which a population's growth rate slows or stops flowing a period of exponential growth |
Created by:
amymaxwell
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