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ecology wolker
ecology terms
| Question | Answer |
|---|---|
| Ecology | the scientific study of interacions among organisms and between organisms and their environment, or surroundings. |
| Bioshpere | 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. |
| Population | Groups of individuals that belong to the smae species and in the same area. |
| Community | Assemblages of different populations that live together in a defined area. |
| Ecosystem | A collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment |
| Biome | A group of ecosystems that have the same climate and similar dominant communities. |
| Autotroph | Organisms that can capture energy from sunlight and or chemicals and use that energy to produce food. |
| Heterotroph | Organisms that rely on other organisms for their energy and food supply. |
| Food web | When the feeding relationships among the various organisms in an ecosystem form a network of complex interactions. |
| Trophic level | Each step in a food chain or food web. |
| Biomass | The total amount of living tissue within a given trophic level. |
| Biogeochemical cycle | Elements, chemical compounds, and other forms of matter are passed from one organism to another and form one part of the biosphere to another. |
| Limiting nutrient | When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly. |
| Weather | The day-to-day condition of Earth's atmosphere at a paricular time and place. |
| Climate | The average, year-to-year conditions of temperature and precipitation in a paricular region. |
| Green house effect | The natural situation in which heat is retained by this layer of greenhouse gases. |
| Biotic factor | The 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 | Occurs when a population's growth slows or stops following a period of exponential growth |
| 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 development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops. |
| 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 the land, air, or water. |
| Biodiversity | The sum total of the genetically based variety of all organisms in the biosphere. |
| Biological magnification | The process in which concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web. |
Created by:
EWolker
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