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RESPONDENT
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Tatyana Andreeva
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SITE NAME
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Erkatayakha River mouth, Kanary settlement, 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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Population of invertebrates in lower reaches of the Erkatayakha River
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Start of survey:
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End
of survey: |
Team
size: |
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1.07
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19.08
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3
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WEATHER
CONDITIONS
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| Season phenology: |
average
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Weather conditions: |
| June was cold and windy, but weather improved slightly in the end of month. Period from 1-10 July was dry and warm, afterwards short periods of dry and rainy weather alternated. Fog from the sea was common, in particular in the second half of 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: |
average
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Breeding conditions:
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Numbers of common breeding waders (Ringed Plover, Red-necked Phalarope, Wood Sandpiper and Temminck's Stint) did not differ from 2001. Golden Plovers were notably more abundant in 2002, and spread to tundra-like habitats in the upper parts of floodplain along with their regular watershed habitats. Chick of Jacksnipe was found on 8.08 on the edge of marsh in the river floddplain.
Start of nesting and incubation, probably, developed favourably in waders, as most territorial birds remained in their territories in early July, and few migrants were seen. Inclement weather with several occasions of 3-day rainy periods from mid July resulted in dissappearance of some agult birds from territories, and we found dead chicks. However, counts of invertebrates showed that sufficient food resources existed for waders until early August. Good weather in late June-early July allowed outstanding yield of cloudberry, crowberry and bog billberry. Notable migration of waders and passerines started from 10 August when fogs became frequent and activity of terrestrial invertebrates declined steeply. Numbers of water invertebrates remained high until late August. Predators were scarse, they had low reproductive success and could not strongly affect bird breeding success.
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Rodent dynamics:
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| Vole numbers increased in the end of summer. In particular, Narrow-skulled Voles became more abundant, and their juveniles were found in pit-fall traps for insects.
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Rodent species recorded:
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| Latin | Abundance |
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| Lemmus sibiricus | rare |
| Microtus middendorffi | rare |
| Microtus gregalis | rare |
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Summary
of fauna studies: |
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