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RESPONDENT
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Mikhail Golovatin
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SITE NAME
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Voikar River middle reaches, Lower Ob' River area, Russia
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| Contact details
(phone/fax//e-mail//address): |
| (34992)5-69-10(off.)/5-71-85(fax) // golovatin@ipae.uran.ru // Inst. of Plant and Animal Ecology, 8 Marta St, 202, Ekaterinburg, 620144, Russia
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PROJECT DETAILS |
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Project name:
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Studies of regularities and mechanisms of bird populations' formation in Subarctic
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Start of survey:
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End
of survey: |
Team
size: |
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30.04
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11.06
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1
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WEATHER
CONDITIONS
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| Season phenology: |
average
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Weather conditions: |
| Spring started in usual dates for the area, but was very rapid in development. Snow accumulation was low, it melt off to 50% cover by 12 May and was finally lost by 17-18 May. Ice on the Voikar River broke on May. Although two floods are normal for the river, warm to hot weather in May fostered snowmelt in mountains which resulted in a single flood. Later water started to regress quickly, and stabilized at a level unusually low for the time of year. Birds started to build nests and lay clutches immediately after arrival.
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| Date of 50%
snow-cover: |
12 May
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| Date of ice-break on
rivers: |
15 May
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| Date of final loss of
snow: |
17-18 May
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
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Breeding conditions:
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| No rodents were recorded. White-tailed Sea Eagle, Northern Harrier and Merlin nested. Weather conditions were favourable for most bird species. However, warm and dry summer should have definitely affect adversely reproduction of waterfowl. Most species had average numbers, with exception of abundant Redpolls and Crossbills Loxia curvirostra. These species started breeding early and had chicks fledging when other birds were still incubating. Low numbers compared to other years had Bean Goose, Whooper Swan and Capercaillie.
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Rodent dynamics:
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Rodent species recorded:
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Summary
of fauna studies: |
| Absolute counts of all bird species were carried out along with mapping at an area of 9 sq km.
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