Production and hydrochemical characteristics of ice, under-ice water and sediments in the Razdolnaya River estuary (Amursky Bay, Sea of Japan) during the ice cover period

Production and hydrochemical characteristics of ice, under-ice water and sediments in the... Production and hydrochemical characteristics of ice, under-ice water, and sediments in the Razdol’naya River estuary (Sea of Japan) were studied during the ice cover periods of the years 2007 and 2008. In 2007, snow cover was absent until mid-February and PAR levels under ice were sufficient for the development of phytoplankton. The chlorophyll a content in ice, under-ice water, and surface sediments was high, while nutrient levels were decreased. After a snowfall, the chlorophyll content in ice and under-ice water decreased sharply. In winter 2008, snow cover was formed immediately after freeze-up; therefore, PAR levels in the ice and under-ice water were significantly reduced. The chlorophyll content was lower, but nutrient levels were higher than in 2007. In both winter seasons, the greatest portion of chlorophyll (up to 85%) was contained in surface sediments. Diatoms were dominant in ice and under-ice water. In the absence of snow, primary production at the end of ice cover period may reach 1 g cal/(m2 day). With snow cover present, this index was markedly reduced. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Production and hydrochemical characteristics of ice, under-ice water and sediments in the Razdolnaya River estuary (Amursky Bay, Sea of Japan) during the ice cover period

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S106307401004005X
Publisher site
See Article on Publisher Site

Abstract

Production and hydrochemical characteristics of ice, under-ice water, and sediments in the Razdol’naya River estuary (Sea of Japan) were studied during the ice cover periods of the years 2007 and 2008. In 2007, snow cover was absent until mid-February and PAR levels under ice were sufficient for the development of phytoplankton. The chlorophyll a content in ice, under-ice water, and surface sediments was high, while nutrient levels were decreased. After a snowfall, the chlorophyll content in ice and under-ice water decreased sharply. In winter 2008, snow cover was formed immediately after freeze-up; therefore, PAR levels in the ice and under-ice water were significantly reduced. The chlorophyll content was lower, but nutrient levels were higher than in 2007. In both winter seasons, the greatest portion of chlorophyll (up to 85%) was contained in surface sediments. Diatoms were dominant in ice and under-ice water. In the absence of snow, primary production at the end of ice cover period may reach 1 g cal/(m2 day). With snow cover present, this index was markedly reduced.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Aug 29, 2010

References

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