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RESPONDENT
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Alexander Kondratyev
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SITE NAME
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Chaun depression, Russia
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| Contact details
(phone/fax//e-mail//address): |
| +7 (812) 145-21-54 // akondratyev@mail.ru // St. Petersburg ,198328, Kuznetsova prosp. 26-1-196
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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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WEATHER
CONDITIONS
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Weather conditions: |
| Spring was relatively early, with a widespread snow melt taking place at the beginning of June.
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| Date of ice-break on
rivers: |
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| Date of final loss of
snow: |
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
low
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Breeding conditions:
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| All birds started to breed intensively but many of their clutches were destroyed by Arctic Foxes and Pomarine Skuas (the latter did not breed). Around mid-summer, Pomarine Skuas were replaced by Arctic Skuas and Long-tailed Skuas (flocks of up to 100-500 birds). On 23 June there was a major deterioration in the weather, with temperatures of -1øC and snow up to 10 cm deep, which remained for two days. This resulted in the mass disappearance of clutches of all small birds and also of Sabine's Gull. Raptors began to eat the eggs of larger birds, and the waders and small passerines which had laid replacement clutches (c. 5-10% of pairs) experienced very low breeding success due to predator pressure. As a result, in early August, juvenile Dunlins were very rare. Most waders had left the tundra by 5 August.
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Rodent dynamics:
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| The number of lemmings was very low.
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Rodent species recorded:
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Summary
of fauna studies: |
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