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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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Start of survey:
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End
of survey: |
Team
size: |
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30.04
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15.06
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WEATHER
CONDITIONS
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| Season phenology: |
average
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Weather conditions: |
| Snow accumulation was low and it melted melted relatively quickly, in average time for the area. Ice broke at average time on the Voikar (16 May) and Ob' (17-20 May) rivers. Spring development was rapid in May, but cold weather with rains returned in early June, and snow cover re-established in the mountains. Summer was warm in general, but alternating weather prevailed both in spring and summer, when hot days were followed by cold days with rains, wet snow, and frequent storms. Water table was average in the Ob' River.
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| Date of 50%
snow-cover: |
12.05
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| Date of ice-break on
rivers: |
16.05
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| Date of final loss of
snow: |
17-19.05
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
low
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Breeding conditions:
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| Rapid spring resulted in intensive bird migration and early start of vegetaion in plants. Numbers of most birds were close to average, with insignificant decrease compared with 2002. Numbers of Arctic Terns remained low. Abundance of Willow Grouse decreased and a fraction of males failed to pair. Numbers of other species of grouse increased, including Black Grouse which abundance increased in tundra. Owls occurred at low density due to decrease of rodent numbers after peak in 2002. Total numbers of Common Crows continued to increase although increase in nesting density was less pronounced.
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Rodent dynamics:
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Rodent species recorded:
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| Latin | Abundance |
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| Arvicola terrestris | |
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Summary
of fauna studies: |
| Bird counts on the plot were carried out, along with descriptions of nests, spatial distribution and behaviour.
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