Krebs, Charles J; Bilodeau, Frédéric; Reid, Donald; Gauthier, Gilles; Kenney, Alice J; Gilbert, Scott; Duchesne, David; Wilson, Deborah J (2012): (Table 1) Rodent (lemming and vole) densities in 5 study areas in the Canadian Arctic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.812214, Supplement to: Krebs, CJ et al. (2012): Are lemming winter nest counts a good index of population density? Journal of Mammalogy, 93(1), 87-92, https://doi.org/10.1644/11-MAMM-A-137.1
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Abstract:
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 density estimates are required. Nest counts also can be used to provide general information about habitat-use in winter, predation rates by weasels, and the extent of winter breeding.
Project(s):
Coverage:
Median Latitude: 70.089226 * Median Longitude: -117.978880 * South-bound Latitude: 68.350000 * West-bound Longitude: -140.186700 * North-bound Latitude: 73.133300 * East-bound Longitude: -80.000000
Date/Time Start: 2007-01-01T00:00:00 * Date/Time End: 2007-01-01T00:00:00
Event(s):
Herschel_Island (HER) * Latitude: 69.579530 * Longitude: -138.957400 * Method/Device: Multiple investigations (MULT)
Komakuk_Beach * Latitude: 69.583300 * Longitude: -140.186700 * Location: Yukon, Alaska, U.S.A., North America * Campaign: CA-Land_2006_YukonCoast (Yukon_Coast_2006; Herschel 2006) * Basis: AWI Arctic Land Expedition * Method/Device: Biological sample (BIOS)
Comment:
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
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Area/locality | Area | Krebs, Charles J | |||
| 5 | Species, common name | Species common | Krebs, Charles J | of dominant species, abundance in brackets | ||
| 6 | Species | Species | Krebs, Charles J | dominant | ||
| 7 | Number | No | Krebs, Charles J | of grids sampled, not all grids sampled every year | ||
| 8 | Number of years | Years | a | Krebs, Charles J | sampled, not all grids sampled every year | |
| 9 | Rodentia, density | Rodentia dens | #/ha | Krebs, Charles J | average | |
| 10 | Rodentia, density | Rodentia dens | #/ha | Krebs, Charles J | range min | |
| 11 | Rodentia, density | Rodentia dens | #/ha | Krebs, Charles J | range max | |
| 12 | Comment | Comment | Krebs, Charles J |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
60 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Area | 5 Species common (of dominant species, abundanc...) | 6 Species (dominant) | 7 No (of grids sampled, not all gri...) | 8 Years [a] (sampled, not all grids sample...) | 9 Rodentia dens [#/ha] (average) | 10 Rodentia dens [#/ha] (range min) | 11 Rodentia dens [#/ha] (range max) | 12 Comment |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Herschel_Island | 69.580 | -138.957 | Herschel Island | Collared lemming (58%) | Dicrostonyx groenlandicus | 2 | 4 | 4.5 | 1.2 | 11.2 | density: only collared lemmings |
| Herschel_Island | 69.580 | -138.957 | Herschel Island | Brown lemming (87%) | Lemmus trimucronatus | 1 | 4 | 17.2 | 2.2 | 64.5 | one small grid dominated by brown lemmings (1.8 ha); density: only brown lemings |
| Komakuk_Beach | 69.583 | -140.187 | Komakuk Beach | Tundra vole (70%), brown lemming (28%) | Microtus oeconomus, Lemmus trimucronatus | 2 | 3 | 3.3 | 1.2 | 5.3 | |
| Pearce_Point | 69.800 | -122.667 | Pearce Point | Collared lemming (100%) | Dicrostonyx groenlandicus | 4 | 2 | 0.6 | 0.2 | 2.1 | |
| Walker_Bay | 68.350 | -108.083 | Walker Bay, Kent Peninsula | Collared lemming (87%) | Dicrostonyx groenlandicus | 5 | 4 | 5.2 | 0.1 | 34.1 | |
| Sirmilik_NP | 73.133 | -80.000 | Bylot Island | Collared lemming | Dicrostonyx groenlandicus | 3 | 4 | 0.3 | 0.0 | 3.0 | density: only collared lemmings |
| Sirmilik_NP | 73.133 | -80.000 | Bylot Island | Brown lemming | Lemmus trimucronatus | 3 | 4 | 1.6 | 0.0 | 8.7 | density: only brown lemmings |