accidental species
accidental species One of five classes of fidelity used by the Braun-Blanquet school of phytosociology in the description and classification of plant communities. Accidentals are rare species in the community, present either as chance invaders from another community or as relicts from a previous community. Compare exclusive species; indifferent species; preferential species; and selective species.
accidental species
accidental species One of five classes of fidelity used by the Braun-Blanquet school of phytosociology in the description and classification of plant communities. Accidentals are rare species in the community present either as chance invaders from another community or as relics from a previous community. Compare EXCLUSIVE SPECIES; INDIFFERENT SPECIES; PREFERENTIAL SPECIES; and SELECTIVE SPECIES.
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Indifferent Species , indifferent species A species with no real affinity for any particular community, but which is not rare (as an accidental species would be). It is fi… preferential species , preferential species In phytosociology, a species that is present with varying abundance in several communities, but is especially abundant and vigor… Constant Species , constant species(constancy) In phytosociology, a species common to a particular association or community, but not necessarily confined to that commun… Faithful Species , faithful species (fidelity) In phytosociology, a species confined, or nearly so, to a particular association. The species may or may not be constant… Companion Species , companion species A term formerly used in the Braun-Blanquetphytosociological scheme to mean ‘indifferent species’. Companion species at the associat… Centrifugal Speciation , centrifugal speciation The principle that new species are likely to arise towards the centre of the range of the present species, rather than at the…
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