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«IZVESTIYA IRKUTSKOGO GOSUDARSTVENNOGO UNIVERSITETA». SERIYA «BIOLOGIYA. ECOLOGIYA»
«THE BULLETIN OF IRKUTSK STATE UNIVERSITY». SERIES «BIOLOGY. ECOLOGY»
ISSN 2073-3372 (Print)

List of issues > Series «Biology. Ecology». 2017. Vol. 22

Biotopic and Spatial Distribution of Lemmings in Western Taimyr

Author(s)
I. Yu. Popov
Abstract
The studies were carried out as part of the work of the international Arctic expedition in the summer field seasons (June-August) from 1993 to 1995, in 2002 and from 2004 to 2008 on the territory of the Great Arctic Reserve on the western coast of the Taimyr Peninsula in the delta of Pyasina River (74º10’ N 86º45ʹ E). Peculiarities of biotopic and spatial distribution of two lemming species in Arctic tundra on western Taimyr was examined by snap-traps on lines and plots (0,25ha) and by life-traps on one plot (1ha). All methods shown similar results - it was shown that each of two species had its own biotope preferences. For Siberian lemming it was grass-sedge marshy tundra and rocks and stony fields with lichen-moss vegetation, for collared lemming - rubble polygonal dwarf-willow tundra. Simultaneously, the plant community preferences partly coincided in the two species. Both lemmings had a high abundance in the dominant plant community - polygonal-hummocky tundra. The biotope distribution of Siberian lemming was shown to be considerably wider than that of collared lemming. When both species coexisted on the same plot, Siberian lemming was ousted into the moister habitats with grass-sedge type of plant cover. The captures of animals were patchier when the habitat diversity increased. The sizes of home ranges decreased when the population density increased.
Keywords
Siberian lemming, collared lemming, arctic tundra, preferences of biotope, habitats, spatial distribution, home range
UDC
599.323.4
References

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