In phytosociology, a species confined, or nearly so, to a particular association. The species may or may not be constant to the association fidelity, and therefore faithful or characteristic species can be determined satisfactorily only if a full knowledge of other community types is available. Five fidelity classes are commonly distinguished: (a) accidental; (b) indifferent; (c) preferential; (d) selective; (e) exclusive. See also companion species; kennarten species; plant association.
Subjects: Plant Sciences and Forestry — Ecology and Conservation.