Transformation of suspended particulate matter into sediment in the Kara Sea in September of 2011

被引：43

作者：

Lein, A. Yu. ^{[1
]}

Makkaveev, P. N. ^{[1
]}

Savvichev, A. S. ^{[2
]}

Kravchishina, M. D. ^{[1
]}

Belyaev, N. A. ^{[1
]}

Dara, O. M. ^{[1
]}

Ponyaev, M. S. ^{[1
]}

Zakharova, E. E. ^{[2
]}

Rozanov, A. G. ^{[1
]}

Ivanov, M. V. ^{[2
]}

Flint, M. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Shirshov Inst Oceanol, Moscow 117901, Russia

[2] Russian Acad Sci, Winogradskii Inst Microbiol, Moscow 117901, Russia

来源：

OCEANOLOGY | 2013年 / 53卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

ORGANIC-MATTER; ISOTOPIC COMPOSITION; BOTTOM SEDIMENTS; CARBON; YENISEI; WATER; PREDOMINANCES; HYDROCARBONS; RIVER;

D O I：

10.1134/S0001437013050081

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

The biogeochemical processes participating in the transformation of the particulate matter into sediment along the Yenisei River-St. Anna Trough (Kara Sea) meridional profile were studied using hydrochemical, geochemical, microbiological, radioisotope, and isotope methods. The water-sediment contact zone consists of three subzones: the suprabottom water, the fluffy layer, and the surface sediment. The total number, biomass, and integral activity of the microorganisms (dark (CO2)-C-14 assimilation) in the fluffy layer are usually higher than in the suprabottom water and sediment. The fluffy layer shows a decrease in the oxygen content and the growth of the dissolved biogenic elements. It was provided by the particulate organic matter supporting the vital activity of the heterotrophs from the overlying water column and by the flux of reduced compounds (NH4, H2S, CH4, Fe2+, Mn2+, and others) from the underlying sediments. The C-org isotopic composition of the fluffy layer and the sediments is 2-4 aEuro degrees heavier than that of the particulate matter and sediment due to the presence of the isotopically heavy biomass of microorganisms. A change in the isotopic composition of the C-org in the fluffy layer and surface sediment as compared to the C-org of the particulate matter is a widespread phenomenon in the Arctic shelf seas and proves the leading role of microorganisms in the transformation of the particulate matter into sediment.

引用

页码：570 / 606

页数：37

共 40 条

[1]

[Anonymous], 2009, SUSPENDED MATTER WHI

[2] The Organic Carbon in the Water, the Particulate Matter, and the Upper Layer of the Bottom Sediments of the West Kara Sea [J].

Belyaev, N. A. ;

Peresypkin, V. I. ;

Ponyaev, M. S. .

OCEANOLOGY, 2010, 50 (05) :706-715

[3]

Belyaeva A. N., 1995, GEN STUDIES GEOCHEMI, P260

[4]

BOLSHAKOV AM, 1995, OKEANOLOGIYA+, V35, P399

[5]

Boudreau B.P., 1997, DIAGENETIC MODELS TH

[6]

Danyushevskaya A. I., 1990, Organic Matter of Bottom Deposits of the World Ocean Polar Zones

[7] Even-n-alkane/alkene predominances in surface sediments from the Calabar River, SE Niger Delta, Nigeria [J].

Ekpo, BO ;

Oyo-Ita, OE ;

Wehner, H .

NATURWISSENSCHAFTEN, 2005, 92 (07) :341-346

[8] Even n-alkane predominances on the Amazon shelf and a Northeast Pacific hydrothermal system [J].

Elias, VO ;

Simoneit, BRT ;

Cardoso, JN .

NATURWISSENSCHAFTEN, 1997, 84 (09) :415-420

[9]

Fahl K., 2003, P MARINE SCI, V6, P329

[10]

Gal'chenko V. F., 1994, Mikrobiologiya, V63, P683

← 1 2 3 4 →