ecology
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each of the black spaces below before clicking
on it to display the answer.
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| Ecology | Ecology is the scientific study of interactions among organisms and between organisms and their environment, or surroundings.
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| Biosphere | the Biosphere contains the combined portions of the planet in which all of life exists, including land, water, and air, or atmosphere.
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| Species | A species is a group of organisms so similar to one another that they can breed and produce fertile offspring.
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| Population | Populations are groups of individuals that belong to the same species and live in the same area.
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| Community | Communities are assemblages of different populations that live together in a defined area.
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| Ecosystem | An ecosystem is a collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment.
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| Autotroph | Autotrophs use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules.
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| Heterotroph | Heterotrophs are organisms that rely on other organisms for their energy and food supply.
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| Food web | A food web is when the feeding relationships among the various organisms in an ecosystem form a network of complex interactions.
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| Trophic Level | A trophic level is each step in a food chain or food web.
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| Biomass | Biomass is the total amount of living tissue within a given trophic level.
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| Biogeochemical Cycle | Elements, chemical compounds, and other forms of matter are passed from one organism to another through biogeochemical cycles.
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| 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.
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| Weather | Weather is the day-to-day condition of Earth's atmosphere at a particular time and place.
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| Climate | Climate refers to the average, year-after-year conditions of temperature and precipitation in a particular region.
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| Green House Effect | The natural situation in which heat is retained by this layer of greenhouse gases is called the greenhouse effect.
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| Biotic Factor | The biological influences on organisms within an ecosystem are called biotic factors.
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| Abiotic Factor | Abiotic Factors are physical, or nonliving, factors that shape ecosystems.
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| 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.
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| Logistic Growth | Logistic growth occurs when a population's growth slows or stops following a period of exponential growth.
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| Carrying Capacity | Carrying Capacity is the largest number of individuals of a population that a given environment can support.
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| Demography | Demography is the scientific study of human populations.
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| Demographic Transition | The demographic transition is a dramatic change in birth and death rates.
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| 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.
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| Renewable Resource | A renewable resource is a resource that can regenerate quickly and that is replaceable.
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| Pollutant | A pollutant is a harmful material that can enter the biosphere through the land, air, or water.
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| Biodiversity | Biodiversity is the sum total of the variety of organisms in the biosphere.
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| 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.
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