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RESPONDENT
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Vadim Ryabitsev
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SITE NAME
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Seyakha River lower reaches, central Yamal Peninsula, Russia
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| Contact
details (phone/fax//e-mail//address): |
| (343)-2-605-605/(343)-2-608-256 // riabits@etel.ru // Schorsa St., 30-32, Ekaterinburg, 620142, Russia |
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PROJECT DETAILS
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Start of survey:
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End
of survey:
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Team
size:
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21.06 |
12.07 |
3 |
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WEATHER CONDITIONS
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Weather conditions: |
| Late spring was followed by a cold rainy summer. Snowfalls did not occur in the study period from 21 June to 12 July. Rainy weather in the period of mass hatching in waders and grouse and feeding of chicks by passerines caused an increase of water level in floodplain lakes and marshes, and apparently resulted in perishing of clutches and chicks. |
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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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Arctic Fox was seen only once, but their barking was heard several times in June. A single wandering Snowy Owl was recorded. Among skuas, the Arctic Skua was a single species observed and breeding. Among birds of prey only Rough-legged Buzzards bred, but they deserted most of the clutches, and it is not likely that chicks survived to fledging, except perhaps for the nest closest to settlement. Thus, predation pressure on birds and their clutches did not appear significant. However, cold rains in the middle of reproduction apparently had strong adverse effect on survival of clutches and chicks (several nests from a few under study were flooded). In spite of the early termination of surveys based on a long-term experience we can conclude that reproductive success should have been average or slightly lower in most species of birds.
Several new species of more southern oringin were recorded in the area compared with 1970s (Ryabitsev, Primak, 2006), although late spring in 2006 did not favour advancement of southern species to the north. |
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Rodent dynamics:
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| Numbers of voles were low and lemmings were not recorded.
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Rodent species recorded:
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Summary
of fauna studies: |
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