Subnivean accumulation of CO2
and its effects on winter distribution
of small mammals

C. E. Penny

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

 

BACK to TBS THESES and RESEARCH PAPERS PAGE

 

Penny, C.E. 1978. Subnivean accumulation of CO2 and its effects on winter distribution of small mammals. M.Sc. Thesis, University of Manitoba. 106 pp.

 

Abstract

Measurements of subnivean CO2 during two winters (1974-1975 and 1975-1976) in six different habitats in the taiga 280 km northeast of Winnipeg, Manitoba revealed that CO2 accumulated consistently in four habitats while not in two others. The CO2 concentrations increased up to maxima of five times ambient levels. The accumulation of CO2 was affected primarily by density and hardness of the snow.

A reduction in small mammal numbers was associated with the fall critical period. Accumulation of subnivean CO2 was frequently associated with changes in small mammal distribution, involving reductions in the numbers of animals present at the sites of greater CO2 concentrations.

 


 

This page created March 2, 1999.

 

BACK to TBS THESES and RESEARCH PAPERS PAGE

 

Copyright © 1999 Taiga Biological Station, U/M