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RESPONDENT
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Tatyana Andreeva
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SITE NAME
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Enzoryakha River lower reaches, Yamal Peninsula, Russia
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| Contact details
(phone/fax//e-mail//address): |
| (095)151-10-02/916-491-16-07 // // Krasnoarmeyskaya St., 25-94, Moscow, 125319, Russia
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PROJECT DETAILS |
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Project name:
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Populations of invertebrates in tundra of Yamal.
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Start of survey:
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End
of survey: |
Team
size: |
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26.06
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13.08
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1
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WEATHER
CONDITIONS
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Weather conditions: |
| Snow melt and ice-break were very early. Weather was cold and very dry most of the time, and even intensive thunderstorms in late July-early August were followed by low amount of precipitation. A rare combination of cool and dry conditions had no apparent impact on birds, although many species departed from the Enzoryakha River valley after 4-6 August.
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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: |
high
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Breeding conditions:
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| Breeding conditions in the Payuta railway station area were generally favourable for birds in spite of low temperatures. Tundra became available for breeding early, prolonged rains did not occur, and plant growth developed normally which resulted in sufficient amounts of green biomass, seeds and berries (with the exception of cloud-berry). A crop of mushrooms was record heavy and prolonged in time. Low water table allowed warming up of shallow waters of lakes which led to outbreak in numbers of water invertebrates (e.g., tadpole shrimps). Arctic Foxes were not recorded. Rough-legged Buzzards and Long-tailed Skuas were common and bred successfully, while Short-eared Owls were rare non-breeders. Northern Harrier was not numerous but occurred everywhere. Predators had sufficient amounts of food, and they were not numerous enough to deplete rodent populations, which consequently spread widely in tundra by the end of summer.
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Rodent dynamics:
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| Siberian Lemmings and Middendorff's Voles were common and increased numbers by August due to dispersion. Narrow-skulled Voles became very numerous by August, while numbers of of abundant Muskrats were stable during the season.
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Rodent species recorded:
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| Latin | Abundance |
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| Lemmus sibiricus | common |
| Microtus middendorffi | common |
| Microtus gregalis | abundant |
| Ondatra zibethicus | abundant |
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Summary
of fauna studies: |
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