Report : setinfo

RESPONDENT
Andrei Moroz

SITE NAME
Pyasina River mouth (Lidia Bay), Russia

Contact details (phone/fax//e-mail//address):
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PROJECT DETAILS

Project name:

Start of survey:	End of survey:	Team size:

WEATHER CONDITIONS

Season phenology:

late

Weather conditions:

Spring was unusually late following a very snowy winter. Freezing temperatures prevailed in June, and early snow-free patches became repeatedly covered with new snow. Snow along the streams became filled with water in the last five days of June, and even in early July 80% of the tundra area was still under snow.

Season temperature:

Season humidity:

Date of 50% snow-cover:

Date of ice-break on rivers:

Date of final loss of snow:

BIOTIC CONDITIONS

Rodents abundance evaluation:

average

Breeding conditions:

Arctic Foxes were very numerous (c. 10 animals were observed every day) but did not breed; several dead individuals were found. In July their number slightly decreased. Waders arrived late and many of them probably could not start breeding as most of the tundra was still under the snow. It seemed that those birds which started breeding lost their clutches rather quickly due to Arctic Fox predation: thus, only one wader nest was found (Curlew Sandpiper) in the study area.

Rodent dynamics:

When the snow started to melt lemmings became visible; Lemmus sibiricus and Dycrostonix torquatus were recorded in equal ratio, their number was slightly lower than average. Lemming index 1.2 - average abundance.

Rodent species recorded:

Latin	Abundance
Lemmus sibiricus	common
Dicrostonyx torquatus	common

Summary of fauna studies:

Group of species	Presence	Abundance	Breeding
arctic foxes	Yes	abundant	no
lemmings	Yes	common
waders	Yes		breeding