Small mammal productivity and consumption in spruce forest and reforestation in South Sweden.

Primary production, production of and energy flow through small mammal populations, as well as their consumption, was measured by IBP methods. In a mature spruce forest with mainly granivorous species the impact by small rodents was not appreciable. In a reforestation on a clear felled area there were large annual variations in productivity with 0.5-2% total and 1-3% "useful" primary production being consumed by small rodents. The main snail mammal consumer in this habitat was Mictotus agrestis (14. Production varied between 05 and 5% of the assimilated energy; the differences being due mainly to species and physiological properties. [ABSTRACT FROM AUTHOR]