preferential species In phytosociology, a species that is present with varying abundance in several communities, but is especially abundant and vigorous in one particular community. It belongs to fidelity class 3 in the Braun-Blanquet phytosociological scheme. Compare accidental species; exclusive species; indifferent species; and selective species.

preferential species In phytosociology, a species that is present with varying abundance in several communities, but is especially abundant and vigorous in one particular community. It belongs to fidelity class 3 in the Braun-Blanquet phytosociological scheme. Compare ACCIDENTAL SPECIES; EXCLUSIVE SPECIES; INDIFFERENT SPECIES; and SELECTIVE SPECIES.