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Ecology-PH
flash cards
| Question | Answer |
|---|---|
| Ecology | The scientific study of interactions among organisms and their environments |
| Biosphere | contains the combined portions of the planet in which all life exists |
| Species | a group of organisms so similar to each other that they can breed and produce fertile offspring |
| Population | Groups of individuals that belong to the same species and live 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 physical (nonliving) environment |
| Autotroph | Organisms that can create their own food from sunlight or chemicals |
| Heterotroph | Organisms that rely on other organisms for energy and food. (consumers) |
| Food Web | A complex network of interactions in an ecosystem (links all food chains in an ecosystem together) |
| Trophic Level | each step in a food chain or web |
| Biomass | The total amount of living tissue in a trophic level |
| Biogeochemical Cycles | The way energy and matter is recycled between ecosystems (from one organism to another, from one part of the biosphere to another) |
| Limiting Nutrient | A single nutrient that limits its ecosystem because of its scarcity or slow cycles |
| Weather | The day-to-day condition of Earth's atmosphere at a particular time and place |
| Climate | The average year to year temperatures and precipitation in a given area |
| Greenhouse Effect | The natural trapping of heat by greenhouse gases in the Earth's atmosphere |
| Biotic Factor | Biological influences on organisms within an ecosystem |
| Abiotic Factor | Physical, nonliving factors that shape an ecosystem |
| Niche | The full range of physical and biological conditions in which an organism lives and the way the organism uses these conditions |
| Logistic Growth | occurs when a population's growth slows or stops during a period of exponential growth |
| Carrying Capacity | The number of individuals that an environment can support |
| Demography | The scientific study of human populations |
| Demographic Transitions | a dramatic change in birth or death rates |
| Green Revolutionn | Modern Agricultural techniques introduced to increase the world's food supply |
| Renewable Resource | can regenerate if they are alive or can be reoplenished by biochemical resources |
| Pollutant | A harmful material that can enter the biosphere |
| Biodiversity | The total sum of genetically based variety of all organisms in the biosphere |
| Biological Magnification | concentrations of harmful substance in organisms at higher levels of the food chain or web |
Created by:
paigeh
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