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biological productivity of consuments.

reservoirs of average productivity (with the average content of biogenic members).

reservoirs with low level of primary productivity (low content of biogenic elements).

proportion between a number of species and any index of significance: number, biomass, productivity, etc.

shallow, well warmed up pools distinguished by large productivity and the heightened content of biogenic elements.

magnitudes, indexes, reflecting fundamental properties of ecosystem: biological productivity, intensity of a turnover, diversity, etc.