Subnivean Accumulation of C02
and its Effects on Winter Distribution
of Small Mammals

Cheryl E. Penny

William 0. Pruitt, Jr.

Department of Zoology,
The University of Manitoba,
Winnipeg, Manitoba, Canada
R3T 2N2

 

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Penny, C.E., and W.O. Pruitt, Jr. 1984. Subnivean Accumulation of C02 and its Effects on Winter Distribution of Small Mammals. Spec. Publ. Carnegie Museum of Natural History, No. 10: 373-380.

Abstract

Subnivean CO2 and small mammal populations were monitored in six habitats in the taiga of southeastern Manitoba from May 1974 to May 1976. Subnivean CO2 accumulated consistently in some habitats, but not in others; accumulation was similar in the same habitats in both winters. Accumulation of subnivean CO2 was significantly associated with a change in distribution of small mammals, especially in the aspen upland. Concentration of subnivean CO2 is therefore an additional dimension to the ecological niche of Clethrionomys gapperi and must be taken into account when considering winter distribution of this species.

 


 

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