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ecology
| Question | Answer |
|---|---|
| Ecology | Ecology is the scientific study of interactions among organisms and between organisms and their environment, or surroundings. |
| Biosphere | the Biosphere contains the combined portions of the planet in which all of life exists, including land, water, and air, or atmosphere. |
| Species | A species is a group of organisms so similar to one another that they can breed and produce fertile offspring. |
| Population | Populations are groups of individuals that belong to the same species and live in the same area. |
| Community | Communities are assemblages of different populations that live together in a defined area. |
| Ecosystem | An ecosystem is a collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment. |
| Autotroph | Autotrophs use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules. |
| Heterotroph | Heterotrophs are organisms that rely on other organisms for their energy and food supply. |
| Food web | A food web is when the feeding relationships among the various organisms in an ecosystem form a network of complex interactions. |
| Trophic Level | A trophic level is each step in a food chain or food web. |
| Biomass | Biomass is 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 through biogeochemical cycles. |
| Limiting Nutrient | When an ecosystem is limited by a single nutrient that is scarc or cycles very slowly, this substance is called a limiting nutrient. |
| Weather | Weather is the day-to-day condition of Earth's atmosphere at a particular time and place. |
| Climate | Climate refers to the average, year-after-year conditions of temperature and precipitation in a particular region. |
| Green House Effect | The natural situation in which heat is retained by this layer of greenhouse gases is called the greenhouse effect. |
| Biotic Factor | The biological influences on organisms within an ecosystem are called biotic factors. |
| Abiotic Factor | Abiotic Factors are physical, or nonliving, factors that shape ecosystems. |
| Niche | A niche is 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 | Logistic growth occurs when a population's growth slows or stops following a period of exponential growth. |
| Carrying Capacity | Carrying Capacity is the largest number of individuals of a population that a given environment can support. |
| Demography | Demography is the scientific study of human populations. |
| Demographic Transition | The demographic transition is a dramatic change in birth and death rates. |
| Green Revolution | The Green Revolution is the development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops. |
| Renewable Resource | A renewable resource is a resource that can regenerate quickly and that is replaceable. |
| Pollutant | A pollutant is a harmful material that can enter the biosphere through the land, air, or water. |
| Biodiversity | Biodiversity is the sum total of the variety of organisms in the biosphere. |
| Biological Magnification | Biological magnification is the increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web. |
Created by:
emw412
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