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20 Cards in this Set
- Front
- Back
Biosphere
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Portion of earch in which living (biotic) organisms exist and interact with one another and their nonliving (abiotic) environment
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Population
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Group of interacting individuals of the same species that occupy a specific area at a specific time
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Community
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A complex interacting network of plants, animals, and microorganisms
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Ecosystem
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A community of different species interacting with one another AND with their nonliving environment of matter and energy
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Autotroph
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An organism that can synthesize its own food
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Heterotroph
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Can't synthesize the nutrients that it needs to survive
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Symbiotic relationship
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A close, prolonged association between two or more different organisms of different species that may, but does not necessarily, benefit each member.
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Mutualism
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Both organisms benefit from each other
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Commensalism
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Two things that live together...one benefits and the other isn't affected
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Parasitism
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1 organisms benefits, one is harmed (tapeworm)
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Habitat
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The place where a population (or individual organism) normally lives
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Niche
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The "job" or "role" that an organism plays in an ecosystem
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Producer
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Use solar or chemical energy to make their own food
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Consumer
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Organisms that cannot synthesize the nutrients they need to survive (must get from some other source...heterotrophs)
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Decomposer
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An organism, often a bacterium or fungus, that feeds on and breaks down dead plant or animal matter, thus making organic nutrients available to the ecosystem.
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Food Chain
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Sequence of organisms, each of which is a source of food for the next. Determines how energy and nutrientes move from one organism to another through the ecosystem
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Food Web
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A complex network of interconnected food chains in an ecosystem
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Energy Pyramid
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Pyramid that shows the relative energy available at each "level" in an ecosystem
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Ecological Succession
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Process where a natural community moves from simpler organisms to more complex ones
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Carrying Capacity (K)
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The maximum number of individuals that a given environment can support without detrimental effects (toatl NPP [Net Primary Productivity])
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