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14
Environmental Studies
11th Grade
11/06/2007

Additional Environmental Studies Flashcards

 


 

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Term
Coevolution
Definition
evolution involving a series of reciprocal changes in two or more noninterbreeding populations that have a close ecological relationship and act as agents of natural selection for each other, as the succession of adaptations of a predator for pursuing and of its prey for fleeing or evading
Term
ecological succession
Definition

the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established

Term
Abundance
Definition
an extremely plentiful or oversufficient quantity or supply
Term
Climaz Community
Definition
A stage in ecological development in which a community of organisms, especially plants, is stable and capable of perpetuating itself
Term
Commensalism
Definition
A symbiotic relationship between two organisms of different species in which one derives some benefit while the other is unaffected.
Term
Competition
Definition
the struggle among organisms, both of the same and of different species, for food, space, and other vital requirements.
Term
Complexity
Definition
the quality of being intricate and compounded
Term
Convergent Evolution
Definition
The development through evolution of similar features by organisms with distinctly different ancestors. A common example of this is the evolution of wings in insects and birds.
Term
Divergent Evoltuion
Definition
the process by which a species evolves into two or more descendant or different forms; also, the process of tracing two or more species back to a common ancestor
Term
Ecological Niche
Definition
the role that an animal or plant species plays in the environment, the status of an organism within its environment which affects its survival
Term
Ecotone
Definition
A transitional zone between two ecological communities, as between a forest and grassland or a river and its estuary. An ecotone has its own characteristics in addition to sharing certain characteristics of the two communities.
Term
Edge Effect
Definition
the tendency toward greater variety and density of plant and animal populations in an ecotone.
Term
Evolution
Definition
a process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
Term
Habitat
Definition
the natural environment of an organism; place that is natural for the life and growth of an organism
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