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27 Cards in this Set
- Front
- Back
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Biomass
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total mass of organisms from level to level
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Ecology
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study of relationships & interactions of living things with one another & their environment
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Biosphere
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an area in which living things are know to exist (includes air, land, water)
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Biome
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geographical zone of different ecosystems sharing climate conditions
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Ecosystem
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unit of all living & nonliving things in an area that interact with one another (tiny as a drop of H2O, larges as a planet)
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Community
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the living part of an ecosystem; all the organisms that live together in a certain area (pond community)
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Population
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group of organisms of the same species living together in the same area (all the trout in a lake)
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Individual
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living thing belonging to a particular species
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Dominant Population
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organisms present in greatest number
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Population Crash
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sudden drastic decrease in number due to a dramatic event
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Limiting Factors
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factors that control population (density, food supply, predation, disease)
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Environment
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all living & nonliving things with which an organism may interact; part of the biosphere that surrounds & influences an organism
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Succession
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slow progression of changes in species in a community during the development of vegetation
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Habitat
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the place in which an organism lives & obtains the resources it needs to survive
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Niche
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the role of an organism in an ecosystem (includes what it does & what it needs)
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Producer
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organism that makes it own food (uses energy to turn raw materials into food)
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Consumer
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organism that cannot make its own food ( feed directly or indirectly on producers)
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Decomposer
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break down dead organisms into simpler substances (bacteria, mold)
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Competition
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interaction in which organisms struggle with one another to obtain resources
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Predation
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organisms catch, kill, eat others (predators/prey)
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Symbiosis
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2 organisms live near, on, inside one another/ at least one benefits
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Commensalism
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sybiosis in which one organism benefits and the other is not harmed
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Mutualism
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symbiosis in which both organisms benefits
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Parasitism
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symbiosis in which one organism benefits & one is harmed
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Adaptation
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process that allows organisms to become better suited to their environment
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Natural Selection
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process in which the most fit organism produce offspring (survival of fittest)
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Biological Magnification
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build up of a persistent chemical (not diluted by air or H2O) from energy to energy level
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