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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