(Table 1) Rodent (lemming and vole) densities in 5 study areas in the Canadian Arctic ...

Lemmings construct nests of grass and moss under the snow during winter, and counting these nests in spring is 1 method of obtaining an index of winter density and habitat use. We counted winter nests after snow melt on fixed grids on 5 areas scattered across the Canadian Arctic and compared these n...

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Bibliographic Details
Main Authors: Krebs, Charles J, Bilodeau, Frédéric, Reid, Donald, Gauthier, Gilles, Kenney, Alice J, Gilbert, Scott, Duchesne, David, Wilson, Deborah J
Format: Dataset
Language:English
Published: PANGAEA 2012
Subjects:
Event label
Latitude of event
Longitude of event
Area/locality
Species, common name
Species
Number
Number of years
Rodentia, density
Comment
Multiple investigations
Biological sample
Biology
CA-Land_2006_YukonCoast
AWI Arctic Land Expedition
International Polar Year 2007-2008 IPY
Arctic
International Polar Year
IPY
Tundra
Online Access:https://dx.doi.org/10.1594/pangaea.812214
https://doi.pangaea.de/10.1594/PANGAEA.812214
Description
Summary:Lemmings construct nests of grass and moss under the snow during winter, and counting these nests in spring is 1 method of obtaining an index of winter density and habitat use. We counted winter nests after snow melt on fixed grids on 5 areas scattered across the Canadian Arctic and compared these nest counts to population density estimated by mark-recapture on the same areas in spring and during the previous autumn. Collared lemmings were a common species in most areas, some sites had an abundance of brown lemmings, and only 2 sites had tundra voles. Winter nest counts were correlated with lemming densities estimated in the following spring (r(s) = 0.80, P < 0.001), but less well correlated with densities the previous autumn (r(s) = 0.55, P < 0.001). Winter nest counts can be used to predict spring lemming densities with a log-log regression that explains 64% of the observed variation. Winter nest counts are best treated as an approximate index and should not be used when precise, quantitative lemming ... : The number of years sampled includes only years for which both winter nest counts and mark-recapture data were carried out on the same grids. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...

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