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Ecology Wendland
Ecology Flashcards
| Question | Answer |
|---|---|
| Ecology | The scientific study of interactions among organisms and between organisms and their enviroment |
| Biosphere | Contains the combined portions of the planet in which all of life exists, including land, water, and air or atmosphere |
| Species | A group of organisms so similar to one another that they can breed and produce fertile offspring |
| Populations | Groups of individuals that belong to the same species and live in the same area |
| Communities | Assemblages of different populations that live together in a defined system |
| Ecosystem | A collection of all the organisms that live in a particular place, together with their nonliving, or physical, enviroment |
| Autotrophs | Organisms that use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules |
| Heterotroph | Organisms that rely on other organisms for their energy and food supply |
| Food Web | The complex interactions of feeding relationships among various organisms in an ecosystem |
| Trophic Level | A level in the food chain |
| Biomass | The total amount of living tissue within a given trophic level |
| Biogeochemical Cycle | Process by which elements, chemical compounds, and other forms of matter are passed to one another and from one part of the biosphere to another |
| Limiting Nutrient | A nutrient that is scarce or cycles very slowly limiting and ecosystem |
| Weather | The day-to-day condition of Earth’s atmosphere at a particular time and place |
| Climate | The average, year-after-year conditions of temperature and precipitation in a particular region |
| Green House Effect | Natural situation in which heat is retained by a layer of greenhouse gases in the atmosphere |
| Biotic Factor | Biological influences on organisms within an ecosystem |
| Abiotic Factor | Physical, or nonliving, factors that shape ecosystems |
| Niche | The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions |
| Logistic Growth | The number of individuals per unit area |
| Carrying Capacity | The largest number of individuals that a given environment can support |
| Demography | Scientific study of human populations |
| Demographic Transition | A dramatic change in birth and death rates |
| Green Revolution | The effort that greatly increased the world’s food supply |
| Renewable Resource | Can regenerate if they are alive or can be replenished by biochemical cycles if they are nonliving |
| Pollutant | A harmful material that can enter the biosphere through land, air, or water |
| Biodiversity | The sum total of the genetically based variety of all organisms in the biosphere |
| Biological Magnification | Process where the concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web. It affects the whole food web, though the top is at the most risk |
Created by:
awendland
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