Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary

Abstract Studying the carbon dynamics of estuarine sediment is crucial to understanding of carbon cycle in the coastal ocean. This study is to evaluate the mechanisms regulating the dynamics of organic (TOC) and inorganic carbon (TIC) in surface sediment of the Yellow River Estuary (YRE). Based on d...

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Autores principales:	Zhitong Yu, Xiujun Wang, Guangxuan Han, Xingqi Liu, Enlou Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/adb780865b2046edb6abcd1c0dc0c73a
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spelling	oai:doaj.org-article:adb780865b2046edb6abcd1c0dc0c73a2021-12-02T15:08:11ZOrganic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary10.1038/s41598-018-29200-42045-2322https://doaj.org/article/adb780865b2046edb6abcd1c0dc0c73a2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-29200-4https://doaj.org/toc/2045-2322Abstract Studying the carbon dynamics of estuarine sediment is crucial to understanding of carbon cycle in the coastal ocean. This study is to evaluate the mechanisms regulating the dynamics of organic (TOC) and inorganic carbon (TIC) in surface sediment of the Yellow River Estuary (YRE). Based on data of 15 surface sediment cores, we found that TIC (6.3–20.1 g kg−1) was much higher than TOC (0.2–4.4 g kg−1). Both TOC and TIC were generally higher to the north than to the south, primarily due to the differences in kinetic energy level (i.e., higher to the south). Our analysis suggested that TOC was mainly from marine sources in the YER, except in the southern shallow bay where approximately 75% of TOC was terrigenous. The overall low levels of TOC were due to profound resuspension that could cause enhanced decomposition. On the other hand, high levels of TIC resulted partly from higher rates of biological production, and partly from decomposition of TOC associated with sediment resuspension. The isotopic signiture in TIC seems to imply that the latter is dominant in forming more TIC in the YRE, and there may be transfer of OC to IC in the water column.Zhitong YuXiujun WangGuangxuan HanXingqi LiuEnlou ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhitong Yu Xiujun Wang Guangxuan Han Xingqi Liu Enlou Zhang Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
description	Abstract Studying the carbon dynamics of estuarine sediment is crucial to understanding of carbon cycle in the coastal ocean. This study is to evaluate the mechanisms regulating the dynamics of organic (TOC) and inorganic carbon (TIC) in surface sediment of the Yellow River Estuary (YRE). Based on data of 15 surface sediment cores, we found that TIC (6.3–20.1 g kg−1) was much higher than TOC (0.2–4.4 g kg−1). Both TOC and TIC were generally higher to the north than to the south, primarily due to the differences in kinetic energy level (i.e., higher to the south). Our analysis suggested that TOC was mainly from marine sources in the YER, except in the southern shallow bay where approximately 75% of TOC was terrigenous. The overall low levels of TOC were due to profound resuspension that could cause enhanced decomposition. On the other hand, high levels of TIC resulted partly from higher rates of biological production, and partly from decomposition of TOC associated with sediment resuspension. The isotopic signiture in TIC seems to imply that the latter is dominant in forming more TIC in the YRE, and there may be transfer of OC to IC in the water column.
format	article
author	Zhitong Yu Xiujun Wang Guangxuan Han Xingqi Liu Enlou Zhang
author_facet	Zhitong Yu Xiujun Wang Guangxuan Han Xingqi Liu Enlou Zhang
author_sort	Zhitong Yu
title	Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
title_short	Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
title_full	Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
title_fullStr	Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
title_full_unstemmed	Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary
title_sort	organic and inorganic carbon and their stable isotopes in surface sediments of the yellow river estuary
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/adb780865b2046edb6abcd1c0dc0c73a
work_keys_str_mv	AT zhitongyu organicandinorganiccarbonandtheirstableisotopesinsurfacesedimentsoftheyellowriverestuary AT xiujunwang organicandinorganiccarbonandtheirstableisotopesinsurfacesedimentsoftheyellowriverestuary AT guangxuanhan organicandinorganiccarbonandtheirstableisotopesinsurfacesedimentsoftheyellowriverestuary AT xingqiliu organicandinorganiccarbonandtheirstableisotopesinsurfacesedimentsoftheyellowriverestuary AT enlouzhang organicandinorganiccarbonandtheirstableisotopesinsurfacesedimentsoftheyellowriverestuary
_version_	1718388272256778240

Organic and inorganic carbon and their stable isotopes in surface sediments of the Yellow River Estuary

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