The return of an ecosystem or habitat to its original community
structure, natural complement of species, and natural functions.
A facility designed for the ex situ conservation of individual
plan varieties through seed preservation and storage.
Natural selection is the differential contribution of offspring
to the next generation by various genetic types belonging to the
same populations. Artificial selection is the intentional manipulation
by man of the fitness of individuals in a population to produce
a desired evolutionary response.
A group of organisms capable of interbreeding freely with each
other but not with members of other species.
A function of the distribution and abundance of species. Approximately
synonymous with Species Richness. In more technical literature,
includes considerations of the evenness of species abundances.
An ecosystem is said to be more diverse, according to the more
technical definition, if species present have equal population
sizes and less diverse if many species are rare and some are very
A function of several characteristics of community or ecosystem
dynamics, including the degree of population fluctuations, the
community's resistance to disturbances, the speed of recovery
from disturbances, and the persistence of the community's composition
A subdivision of a species; a population or series of populations
occupying a discrete range of differing genetically from other
subspecies of the same species.