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Ecology Part 1

biology notecards sections 3-1 to 4-2

QuestionAnswer
Ecology The scientific study of interactions among organisms and between organisms and their environment, or surroundings.
Biosphere part of Earth in which life exists including, land, water, adn air or atmosphere.
Species a group of organisms so similar to one another that they can breed and produce fertile offspring.
Population groups of individuals that belong to the same species and live in the same area.
Community assemblages of different populations that live together in a defined area.
Ecosystem a collection of all the organisms that live in a particular place, together with their nonliving, or physical, environment
Autotroph plants, some algae, and certain bacteria that can capture energy from sunlight or chemicals and use that energy to produce food.
Heterotroph organisms that rely on other organisms for their energy and food sipply.
Food Web when the feeding relationships among the various organisms in an ecosustem form a network of complex interactions.
Trophic Level each step in a food chain or food web
Biomass 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 and from one part of the biosphere to another
Limiting Nutrient when an ecosystem is imited by a single nutrient that is scarce or cycles very slowly
Weather the day-to-day condition of Earth's atmosphere at a particular time and place.
Climate refers to the average, year-after-year conditions of temperature and precipitaion in a particular region.
Green House Effect the natural situation in which heat is retained by this layer of greenhouse gases.
Biotic Factor the biological influences on organisms within an ecosystem.
Abiotic Factor physical, or nonliving, factors that shape ecosystems.
Niche the full range of physical and biological conditions in which an organism livs and the way in which the organism uses those conditions.
Created by: tatumw
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