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RESPONDENT
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Alexander Dmitriev
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SITE NAME
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Bolshaya Shirta River basin, West Siberia, Russia
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| Contact details
(phone/fax//e-mail//address): |
| 8-916-1261511/8-495-2152901(for Dmitriev) // zzu@inbox.ru // Orekhovy bulevar, 16-241, Moscow, Russia
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PROJECT DETAILS |
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Project name:
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Inventory of animals of the Krasnoselkup district, Yamal-Nenets region
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Start of survey:
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End
of survey: |
Team
size: |
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1.06
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22.06
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3
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WEATHER
CONDITIONS
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| Season phenology: |
average
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Weather conditions: |
Spring was cool and we had only 5 very hot days for the period of surveys from 1-22 June. Ice broke by 22-23 May on the Taz River near Tolka settlement, which is an average date given the range of variation reported by local people from 27 April to 5 June. Ice was still present on large lakes at our arrival on 1 June, but we estimated that snow cover had reduced to 50% on 5-10 May and completely melted by 20 May. Air tempeartures did not drop below freezing even at night in early June, but range of temperature variation reached 20-25øC. Water table dropped 70 cm compared to maximal on 3 June, and decrease another 6 m on the Bolshaya Shirta River by 17 June. According to reports by local people the range of water level variation can be 8 to 11 m in different years.
Vegetation has just started by our departure on 22 June, but migration already terminated. Pair formation and territory establishment aready terminated in passerines, but were still intensive in anseriformes. Extreme weather events were not recorded.
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| Date of 50%
snow-cover: |
5-10.05
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| Date of ice-break on
rivers: |
20.05
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| Date of final loss of
snow: |
20.05
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
low
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Breeding conditions:
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Numerous tracks of reindeers and Brown Bears were recorded.
Black-throated Divers were rare breeders, while Bean Geese were common, and probably bred. Among ducks Teal, European Wigeon and Common Goldeneye were common. Birds of prey were rare, and presumable breeders included Hobby and White-tailed Sea Eagle. Grouse were common with the exception of rare Black and Willow grouse. Among waders Common Sandpiper was common, locally numerous, and Wood Sandpiper was common. Gulls were rare, except for the Common Gull which was common. Skuas and owls were not recorded. Both Common and Oriental cuckoos common, as well as Great Spotted Woodpecker, while Three-toed Woodpecker was rare. Among passerines 10 species were numerous, 13 common and 23 rare.
Lizards Lacerta vivipara and frogs Rana terrestris were recorded several times in the second half of June.
Strong pressure by hunters and poachers resulted in decrease in numbers of large mammals and Salmo taimen.
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Rodent dynamics:
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| Rodent abundance was low. Total catching effort was 755 trap/nights, and yielded an average total density of 0.4 Northern Red-backed Vole per 100 trap/nights. All 3 voles were captured in the Siberian Pine floodplain, in the most distant area from the territory flooded in spring, where also winter tracks of voles were found. Average density of Northern Birch Mouse was 0.4 animals per 10 days based on the total effort 66 cylinder-days.
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Rodent species recorded:
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| Latin | Abundance |
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| Clethrionomys rutilus | rare |
| Sicista betulina | rare |
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Summary
of fauna studies: |
| Bird counts in different habitats were conducted in a framework of Inventory of animals of the Krasnoselkupsky district of Yamalo-Nenetsky Okrug by Reseach Center on Biodiversity Conservation of Russian Academy of Natural Sciences. We also made about 40 geobotanical descriptions, undertook catching of small mammals and studies of their intestinal parasites.
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