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Ecology Griffith
Flash Cards
| Question | Answer |
|---|---|
| What is Ecology? | The scientific study of interactions among organisms and between their environment or surroundings |
| What is a Biosphere? | The combined portions of the planet in which all life exists, including land, water, and air, or atmosphere |
| What is a species? | A group of organisms so similar to one another that they can breed and produce fertile offspring |
| What is a population? | Groups of individuals that belong to the same species and live in the same area |
| What is a community? | Assemblages of different populations that live together in a defined area |
| What is an ecosystem? | A collection of all the organisms that live in a particular place |
| What is an autotroph? | PLants, some algae, and certain bacteria that capture energy from sunlightor chemicals and use that to produce energy |
| What is a heterotroph? | Organisms that rely on other organisms fo rhteir energy and food supply |
| What is a food web? | When the feeding relationships among various organisms in an ecosystem form a network of complex interactions |
| What is a trophic level? | Each step in a food chain |
| What is biomass? | The total amount of living tissue withtin a given trophic level |
| What is a biogeochemical cycle? | elements, chemical compunds, and other forms of matter that are passed from one organism to another through biogeochemical cycles |
| What is a limiting nutrient? | When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly |
| What is weather? | The day to day condition of Earth's atmosphere at a particular time and place |
| What is climate? | The average year-after-year conditions of temperature and precipitation in a particular region |
| What is the greeen house effect? | The natural situation in which heat is retained byby its layer of greenhouse gasses |
| What is a biotic factor? | The biological influences on organisms within an ecosystem |
| What is an abiotic factor? | Physical, or nonliving, factors that shape ecosystems |
| What is a niche? | The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditons |
| What is logistic growth? | When a populations growth slows or stops following a period of exponential growth |
| What is carrying capacity? | The largest numbe rof individual sthat a given environment can support |
| What is demography? | The scientific study of human populations |
| What is a demographic transition? | A dramatic change in birth and death rates |
| What is the greeen revolution? | The effort to increase the worlds food supply |
| What is a renewable resource? | Resources that can regenerate if they are alive or can be replenished by biochemical cycles if they are nonliving |
| What is a pollutant? | A harmful material that can enter the biosphere through the land, air, or water |
| What is biodiversity? | The sum total of the genetically based variety of all organisms in the biosphere |
| What is biological magnification? | Where concentrations of a harmful substance increase in organisms at higher trophic levels in the food chain |
Created by:
igriffith77
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