Term
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Definition
| assemblage of species living in the same area |
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Term
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Definition
| number of species a community contains |
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Term
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Definition
| number of organisms of each species |
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Term
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Definition
| pertains to both the richness (# of different species) and abundance (# of each kind of species) present in a community |
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Term
| individualistic hypothesis |
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Definition
| a community is viewed as a chance assemblage of species found inthe same area because they happen to have similar abiotic requirements |
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Term
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Definition
| a community is viewed as a assemblage of closely linked speces, locked into association by mandatory biotic interactions that cause the community to function as an integrated unit |
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Term
| interspecific interactions |
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Definition
| behavior that occurs between populations of different species living in a community |
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Term
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Definition
| reciprocal evolutionary adaptations in two species whereas a change in one species acts as a selective force on another species and counteradaptation by the second species |
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Term
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Definition
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Term
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Definition
| parasites (type of predator) live on or in the hosts seldom killing them outright |
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Term
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Definition
| insects lay eggs on living hosts. the larvae feed within the body of the host, eventually causing its death |
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Term
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Definition
| animals eat plants (form of predation) |
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Term
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Definition
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Term
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Definition
| brightly colored organisms in which the bright colors act as a warning sign to stay away |
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Term
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Definition
| resemblance to another species |
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Term
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Definition
| palatable or harmless species mimics an unpalatable or harmful species ex: viceroy & monarch |
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Term
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Definition
| two or more unpalatable, aposematically colored species resemble each other |
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Term
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Definition
| organism that derives its nourishment from another organism |
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Term
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Definition
| organism on which the parasite lives/feeds |
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Term
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Definition
| organism that lives within their host ex: tapeworm |
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Term
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Definition
| organism that feeds on the external surface of another organism |
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Term
| interspecific competition |
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Definition
| competition between two or more species relying on the same limiting resource within a community |
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Term
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Definition
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Term
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Definition
| consumption or use of similar resources |
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Term
| competitive exclusion principle |
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Definition
| two species with similar needs for the same limiting resources cannot coexist in the same place |
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Term
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Definition
| sum total of an organism's use of the biotic and abiotic resources in its environment |
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Term
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Definition
| set of resources a population is theoretically capable of using under ideal circumstances. |
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Term
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Definition
| resources a population actually uses |
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Term
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Definition
| species consume slightly different foods or use other resources in slightly different ways |
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Term
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Definition
| tendancy for characteristics to be more divergent in two populations of species living close together vs. separated geographically |
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Term
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Definition
| living together - close physical relationship between two organisms |
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Term
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Definition
| symbiotic relationship where one partner benefits without significantly affecting the other |
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Term
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Definition
| symbiotic relationship where both partners benefit from the relationship |
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Term
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Definition
| symbiotic relationship in which one partner benefits and the other partner is harmed |
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Term
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Definition
| a species that makes an unusually strong impact on community structure compared to its abundance |
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Term
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Definition
| tendancy of a community to reach and maintain an equilibrium or relative constant condition in the face of disturbance |
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Term
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Definition
| events, such as storms, fires, floods, droughts etc that damage communities |
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Term
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Definition
| transition in species composition over time |
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Term
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Definition
| beginning from scratch - no soil formed such as after a volcanic eruption |
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Term
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Definition
| when an existing community has been cleared by a disturbance, but the soil remains |
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Term
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Definition
| study of past and present distribution of individual species and entire communities |
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