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Ecology Oconnor

QuestionAnswer
What is ecology? The scientific study of interactions among organisms and between organisms and their environment.
What is a biosphere? It contains the combined portions of the planet in which all the life exists.
What is a species? A group of organisms so similar to 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? Organisms that use energy from the environment to fuel the assmebly of simple inorganic compounds into complex organic molecules.
What is a heterotroph? Organisms that rely on other organisms for their energy and food supply.
What is a food web? The feeding relationships among various organisms in an eecosystem form a network of complex interactions.
What is a trophic level? Each step in a food chain or food web.
What is biomass? The toatal amount of living tissue within a given trophic level.
What is the biogeochemical cycle? Process by which chemical compounds, elements, and other forms of amtter are passed from one organism to another and from one part of the biosphere to another.
What is limiting nutrient? When in 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 the temperature and precipitation in a particular region.
What is the green house effeect? The natural situation in which heat is reatined by this layer of green house gases.
What are biotic factors? The biological influnces 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 an organism uses those conditions.
What is logistic growth? The growth pattern in which a population's growth rate slows or stops following a period of exponential growth.
What is carrying capacity? The largest number of individuals of a population that a given environment can hold.
What is demography? The scientific study of human populations.
What is the demographic transiation? A dramatic change in birth and death rate.
What is the green revolution? The development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops.
What is a renewable sources? Something that can generate if it is alive or can be replenished by biochemical cycles if it is nonliving.
What is a pollutant? A harmful material that can enter the biosphere through land, air, or water.
What is biodiversity? The sum total of the genetically based variety of all organisms in the biosphere.
What is biologial magnification? When concertrations of harmful subsatnces increase in organisms at higher trophic levels in a food chain or food web.
Created by: Coconnor
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