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Ch. 3-6
Ecology- Lucy
| Question | Answer |
|---|---|
| Ecology | Scientific study of ineractions among 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 individals of the same spicies that live in the same area |
| Community | Assemblage of different populations that live together in a deffined area |
| Ecosystem | Collection of all the organisms that live in a particular place, together with their nonliving environment |
| Autotrouph | 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 food it consumes; also called a consumer |
| Food Web | Network of complex interactions formed by the feeding relationships among verious organisms in an ecosystem |
| Trophic Level | Step in the 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 from one organism to another and from one part of the biosphere to another |
| Limiting Nutrient | Single nutrient that is either scarce or cycles 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 tempurature and percipitation in a particular region |
| Greenhouse Effect | Natueraly 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 in 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 how that organism uses those conditions |
| Logistic Growth | Growth pattern in which a populations growth rate slows or stops following a period of exponetial growth |
| Carrying Capacity | Largest number of individuals of a population that a given environment can support |
| Demography | Scientific study of human populations |
| Demoraphic Transition | Change in 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 agroculture techniques to increase yeilds of food crops |
| Renewable Resource | Resourse that can regenerate quickly and that is replaceable |
| Pollutant | Harmful materical that can enter the biosphere through the land, air, or water |
| Biodiversity | Biological diversity; the sum total of the variety of organisms in a biosphere |
| Biological Magnification | Increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web |
Created by:
lucyelle
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