Pechora Ilych State Nature Reserve

Komi Republic, Russia

Pechora Ilych State Nature Reserve

Komi Republic, Russia
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Kalinin A.A.,RAS Severtsov Institute of Ecology | Kupriyanova I.F.,Pechora Ilych State Nature Reserve
Biology Bulletin | Year: 2016

A new method for quantitative study of small mammals swimming across water obstacles was developed. A line of 25 traps was installed on either poles or boards (“rafts”) with anchors at a distance of 20–25 m from the bank and with 10-m distances between the items. The study was performed upstream along the Ilych River in August 2013. A total of 300 trap/day were accumulated. Twenty-four small mammal individuals of 8 species were captured. Their relative abundance was estimated as the number of individuals per 100 trap/day. It was found experimentally that floating poles neither repel nor attract animals. When an individual accidentally finds a floating pole, it climbs up and explores it for some time. The number of animals per total length of rafts per time unit can be suggested as an index of intensiveness of migration across a water obstacle. In the area studied, the number of small mammals of various species crossing the river was estimated at 26.7 individuals per 1 km/day. A length of 5 m for floating poles/boards and installation of two traps at the ends of an item is suggested to be used. © 2016, Pleiades Publishing, Inc.

Bobretsov A.V.,Pechora Ilych State Nature Reserve | Lukyanova L.E.,Russian Academy of Sciences
Russian Journal of Theriology | Year: 2017

The paper presents the results of the monitoring (1988-2016) of wood lemming Myopus schisticolor (Lilljeborg, 1844) numbers from different landscape areas of the Pechora-Ilych Nature Reserve. It is shown that the population dynamics of this species differ considerably between marked landscapes. The lowland area is characterized by low number of animals with a rare irregular increase of abundance. The cyclic fluctuations were revealed in the foothills with a period of 3-4 years. In the years of depression the abundance indices dropped to zero and quite often it exceed over 100 individuals per 100 cone/nights in the years of number outbreaks. The migrations of animals are observed during the periods of high density. In the lowlands the wood lemming is marked only the next year after a sharp increase in its numbers in the foothills. © Russian Journal Of Theriology, 2017.

Dubrovskii V.Y.,Moscow Zoo | Simakin L.V.,Pechora Ilych State Nature Reserve
Russian Journal of Ecology | Year: 2013

For the first time, continuous studies on the population structure of rodents and insectivores in three altitudinal belts on the eastern macroslope of the Northern Urals have been performed over several years in the Denezhkin Kamen' Nature Reserve. The results show the mountain tundra communities are depleted, the small mammal populations of zonal habitats are similar to each other, and river valleys and sparse forests of the subalpine belt play a leading role in supporting the maximum species diversity of small mammals. © 2013 Pleiades Publishing, Ltd.

Shchipanov N.A.,RAS Severtsov Institute of Ecology | Voyta L.L.,Russian Academy of Sciences | Bobretsov A.V.,Pechora Ilych State Nature Reserve | Kuprianova I.F.,Pechora Ilych State Nature Reserve
Russian Journal of Theriology | Year: 2014

The shape of the skull, mandible, and first lower molar (m1) in 10 geographical samples from four chromosomal races of two karyotypic groups were studied using geometric morphometrics. Discriminant analysis with cross-validation was used to test the accuracy of classifications of specimens using skull shape. The percentage of correct classifications attributed to race varied from 61.8% to 89.5% and ranged from 51.6% to 82.3% for geographical samples. The structuring between races, as measured with Qst (this metric is analogous to Fst, and the latter is used as a measure of genetic disparity between samples), was less than population-level structuring both within and between races. Variance between karyotypic groups in skull size, mandible, and molar shape was greater than between races. In skull shape, the variance was smaller as compared to the inter-racial level without larger "mountain" samples and greater when the entire set of samples was estimated. Interpopulation differences in all census characteristics were the most prominent. The magnitude of Qst in interpopulation estimations was similar both among populations of the same race and among populations of different races. Lack of correlation of Qst level with geographical distance between samples was found both in size and shape of the skull, mandible, and first lower molar. The significant difference between populations within a race was regarded as evidence of limitation of interpopulation migration. Each pair of geographic samples has a unique set of differentiating features. The stochastic variability of traits between the local samples, irrespective of race, is interpreted as evidence of genetic drift within partly isolated local populations. Diminishing differences between races could be a consequence of reabsorbing those stochastic morphological differences back into the metapopulations. The greater level of phenotypic differentiation between karyotypic groups compared to races is interpreted as a greater amount of time elapsed since the time of common ancestry. © Russian Journal Of Theriology, 2014.

Bobretsov A.V.,Pechora Ilych State Nature Reserve | Simakin L.V.,Pechora Ilych State Nature Reserve
Russian Journal of Ecology | Year: 2015

Small mammal (Micromammalia) community structure on the western and eastern macroslopes of the Northern Urals is analyzed using the example of the Pechora–Ilych and Denezhkin Kamen’ nature reserves. The landscape conditions of these areas strongly differ, largely determining the peculiar features of small rodent communities. Polydominant communities with high abundance of many species are formed on the humid western slopes. The abundance of communities on the eastern slopes is smaller and the proportion of dominants is greater. The small mammal communities of this region are similar in a number of parameters to the small mammal communities of the adjacent plains. © 2015, Pleiades Publishing, Ltd.

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