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ecology kellie
biology ch.3
| Question | Answer |
|---|---|
| Ecology | Scientific study of interactions amonong organisms and between organisms and their environment |
| Biosphere | Part in earth in which life exists including land, water, 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 capture energy from sunlight or chemicals and use it to produce its own from inorganic compounds; also called a producer |
| Heterotroph | organism that obtains energy from the foods it consumes; alos 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 food web |
| Biomass | total amount of living tissue withis a given tropic 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 bosphere to another |
| Limiting Nutrient | single nutrient that either is scarce or cycle very slowly, limiting the groth of organisms in an ecosystem |
| Weather | condition of Earths atmosphere at a particular time and place |
| Climate | average, year-after-year conditions of temperature and condition in a particular region |
| Greenhouse Effect | natural situation 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 ecosytem |
| Abiotic Factor | physical or nonliving, factor that shapes an ecosystem |
| Niche | full range of physical and biological conditions in which an organsims lives and the way in which the organism uses those conditions |
| Logistic Groth | growth patter in which a population growth rate slows or stops following a period of exponential growth |
| Carrying Capacity | largest number of individuals of a population that a given envirnment 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 moderns agricultural techniques to increase yields of food crops |
| Renewable Resource | resource that can generate 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 organsims 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:
omgitskellie
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