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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Tolomeev A.P., Drobotov A.V., Kolmakova A.A.
Заглавие : Impact of weather variability on spatial and seasonal dynamics of dissolved and suspended nutrients in water column of meromictic Lake Shira
Колич.характеристики :13 с
Коллективы : Siberian Branch of the Russian Academy of Sciences (SB RAS) [56]; Russian Foundation for Basic Research [13-05-00853]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2014. - Vol. 7, Is. 4. - С. 384-396. - ISSN 1995-4255, DOI 10.1134/S199542551404012X. - ISSN 1995-4263
Примечания : Cited References: 25. - This work was performed with the partial support of the Siberian Branch of the Russian Academy of Sciences (SB RAS) Integration Project no. 56 and grant 13-05-00853 of the Russian Foundation for Basic Research. The work was performed using resources of the field station of the SB RAS Institute of Biophysics (IBP) at Shira Lake. We thank our colleagues from the SB RAS IBP Laboratory of Biophysics of Ecosystems for their friendly participation in joint field works at Shira Lake; Academician A. G. Degermendzhi for his support of research at the saline lakes of Khakassia; the research workers of the SB RAS IBP Analytical Laboratory for the analyses of water and seston samples; and we especially thank Dr. Denis Rogozin for arrangements and assistance in winter field trips to the lakes, as well as to an anonymous reviewer for his valuable comments.
Предметные рубрики: CLIMATE-CHANGE
STRATIFICATION
PHOSPHORUS
RUSSIA
PHYTOPLANKTON
SESTON
Ключевые слова (''Своб.индексиров.''): meromictic lake--weather--thermal stratification--seston--nutrients--stoichiometric ratios
Аннотация: Depths of thermocline and the redox zone, concentrations of dissolved and suspended carbon, and nitrogen and phosphorus in seston were measured in the pelagial of the saline meromictic Lake Shira (southern Siberia) in different years (2007-2011); the relationship of the values for those parameters with air-temperature variations was assessed. Positive correlations between both air temperatures in the previous year and the depth of the redox zone in winter and air temperature in April and the thermocline depth in summer were revealed. In the mixolimnion, the ratio of total nitrogen to total phosphorus almost always exceeded the Redfield ratio (16: 1); seston deficiency both in nitrogen and phosphorus was monitored in different seasons and at various depths. The amount of seston in the mixolimnion in summer almost doubled the amount of seston in winter and was directly related with the depth of the thermocline. In the monimolimnion, seston was rich in nitrogen and phosphorus. The amount of seston in the monimolimnion varied in different years and depended both on the air temperature in the previous year and the size of the zone.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhutova O.N., Gladyshev M.I., Sushchik N.N., Dubovskaya O.P., Buseva Z.F., Fefilova E.B., Semenchenko V.P., Kalachova G.S., Kononova O.N., Baturina M.A.
Заглавие : Comparison of fatty acid composition of cladocerans and copepods from lakes of different climatic zones
Колич.характеристики :10 с
Коллективы : Siberian Branch of the Russian Academy of Sciences; Ural Branch of the Russian Academy of Sciences [12-C-4-1011]; Russian Foundation for Basic Research [11-05-00246-a]; "Thematic Plans Program" of the Ministry of Education and Sciences of the Russian Federation (Siberian Federal University) [B-9]; Federal Program of the Ministry of Education "Scientific and Scientific-Pedagogical Personnel of an Innovative Russia" [16.740.11.0484]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2014. - Vol. 7, Is. 4. - С. 474-483. - ISSN 1995-4255, DOI 10.1134/S1995425514040076. - ISSN 1995-4263
Примечания : Cited References: 47. - This work was supported by Partner Project of the Siberian Branch of the Russian Academy of Sciences no. 8 and Ural Branch of the Russian Academy of Sciences no. 12-C-4-1011; grant from the Russian Foundation for Basic Research no. 11-05-00246-a; grants from "Thematic Plans Program" of the Ministry of Education and Sciences of the Russian Federation (Theme B-9 of Siberian Federal University); and a grant from the Federal Program of the Ministry of Education "Scientific and Scientific-Pedagogical Personnel of an Innovative Russia," national contract no. 16.740.11.0484.
Предметные рубрики: FRESH-WATER ZOOPLANKTON
DOCOSAHEXAENOIC ACID
SEASONAL DYNAMICS
TROPHIC TRANSFER
YENISEI RIVER
LIVE FOOD
GROWTH
TEMPERATURE
SESTON
RESERVOIR
Ключевые слова (''Своб.индексиров.''): cladocerans--copepods--fatty acids--cold lakes--warm lakes
Аннотация: We have studied the fatty acid (FA) contents and composition of cladocerans and copepods from warm and cold lakes. We have found no significant differences in FA percent levels and per carbon contents of cladocerans from warm and cold lakes or of copepods from warm and cold lakes. A discriminant analysis showed that all cladocerans differed from all copepods mainly due to the content of docosahexaenoic acid. Compared to cladocerans, copepods had significantly higher levels of all C22 polyunsaturated FA. Thus, we conclude that cladocerans and copepods in all environments had comparatively invariant taxon-specific compositions and contents of long-chain highly unsaturated fatty acids (HUFAs). According to HUFA content, all studied copepods can be regarded as a valuable food for fish.
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