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
ecological succession

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

an extremely plentiful or oversufficient quantity or supply
Climaz Community
A stage in ecological development in which a community of organisms, especially plants, is stable and capable of perpetuating itself
A symbiotic relationship between two organisms of different species in which one derives some benefit while the other is unaffected.
the struggle among organisms, both of the same and of different species, for food, space, and other vital requirements.
the quality of being intricate and compounded
Convergent Evolution
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.
Divergent Evoltuion
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
Ecological Niche
the role that an animal or plant species plays in the environment, the status of an organism within its environment which affects its survival
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.
Edge Effect
the tendency toward greater variety and density of plant and animal populations in an ecotone.
a process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
the natural environment of an organism; place that is natural for the life and growth of an organism