reference species A species, usually extinct, that occurs as a fossil of characteristic age and can be used to date geologic deposits or the age of a species lineage.
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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… Companion Species , companion species A term formerly used in the Braun-Blanquetphytosociological scheme to mean ‘indifferent species’. Companion species at the associat… Constant Species , constant species(constancy) In phytosociology, a species common to a particular association or community, but not necessarily confined to that commun… 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… Equilibrium Species , Skip to main content equilibrium species
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