Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region

Abstract Transport fluxes and properties of riverine organic carbon in the tropical monsoon region were the vital parameters in the global riverine organic carbon fluxes budget. The study focused on the riverine organic carbon in the Changhuajiang River (CHJR), locating at the mid-west of the Hainan...

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Autores principales:	Qianzhu Zhang, Zhen Tao, Zanwen Ma, Quanzhou Gao, Haojun Deng, Peng Xu, Jian Ding, Zhengang Wang, Youwen Lin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/161e071f68bd491eac128df933d2c983
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spelling	oai:doaj.org-article:161e071f68bd491eac128df933d2c9832021-12-02T15:09:00ZHydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region10.1038/s41598-019-48208-y2045-2322https://doaj.org/article/161e071f68bd491eac128df933d2c9832019-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-48208-yhttps://doaj.org/toc/2045-2322Abstract Transport fluxes and properties of riverine organic carbon in the tropical monsoon region were the vital parameters in the global riverine organic carbon fluxes budget. The study focused on the riverine organic carbon in the Changhuajiang River (CHJR), locating at the mid-west of the Hainan Island, China. Dissolved organic carbon (DOC) concentrations in the CHJR ranged from 0.22 mg/L to 11.75 mg/L with an average of 1.75 mg/L, which was lower than the average of global rivers and had a significantly temporal and spatial variation. Output flux of riverine DOC was calculated as 0.55 t/km2/y, which could be revised up to 1.03 t/km2/y, considering that the riverine discharge before dam construction. A linear model of riverine DOC flux suitable in CHJR basin was established, which involved the factors, such as soil organic carbon, runoff depth and slope, etc. There was a large variation of POC concentrations in the CHJR where the average POC concentration in the dry season was 2.41 times of the wet season. Riverine POC flux in CHJR basin was calculated as 1.78 t/km2/y, higher than the average of global rivers and far lower than those in other domestic larger rivers. About 8.28 × 103 t POC were exported yearly in CHJR, of which, 7.15 × 103 t originated from terrestrial ecosystem and 1.13 × 103 t stemmed from aquatic ecosystem. Meanwhile, about 87.74% of terrestrial source happened in the wet season and 12.26% in the dry season. This research revealed that the riverine organic carbon mainly stemmed from the surface erosion processes in the drainage basin during the wet season.Qianzhu ZhangZhen TaoZanwen MaQuanzhou GaoHaojun DengPeng XuJian DingZhengang WangYouwen LinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qianzhu Zhang Zhen Tao Zanwen Ma Quanzhou Gao Haojun Deng Peng Xu Jian Ding Zhengang Wang Youwen Lin Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
description	Abstract Transport fluxes and properties of riverine organic carbon in the tropical monsoon region were the vital parameters in the global riverine organic carbon fluxes budget. The study focused on the riverine organic carbon in the Changhuajiang River (CHJR), locating at the mid-west of the Hainan Island, China. Dissolved organic carbon (DOC) concentrations in the CHJR ranged from 0.22 mg/L to 11.75 mg/L with an average of 1.75 mg/L, which was lower than the average of global rivers and had a significantly temporal and spatial variation. Output flux of riverine DOC was calculated as 0.55 t/km2/y, which could be revised up to 1.03 t/km2/y, considering that the riverine discharge before dam construction. A linear model of riverine DOC flux suitable in CHJR basin was established, which involved the factors, such as soil organic carbon, runoff depth and slope, etc. There was a large variation of POC concentrations in the CHJR where the average POC concentration in the dry season was 2.41 times of the wet season. Riverine POC flux in CHJR basin was calculated as 1.78 t/km2/y, higher than the average of global rivers and far lower than those in other domestic larger rivers. About 8.28 × 103 t POC were exported yearly in CHJR, of which, 7.15 × 103 t originated from terrestrial ecosystem and 1.13 × 103 t stemmed from aquatic ecosystem. Meanwhile, about 87.74% of terrestrial source happened in the wet season and 12.26% in the dry season. This research revealed that the riverine organic carbon mainly stemmed from the surface erosion processes in the drainage basin during the wet season.
format	article
author	Qianzhu Zhang Zhen Tao Zanwen Ma Quanzhou Gao Haojun Deng Peng Xu Jian Ding Zhengang Wang Youwen Lin
author_facet	Qianzhu Zhang Zhen Tao Zanwen Ma Quanzhou Gao Haojun Deng Peng Xu Jian Ding Zhengang Wang Youwen Lin
author_sort	Qianzhu Zhang
title	Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
title_short	Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
title_full	Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
title_fullStr	Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
title_full_unstemmed	Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
title_sort	hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/161e071f68bd491eac128df933d2c983
work_keys_str_mv	AT qianzhuzhang hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT zhentao hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT zanwenma hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT quanzhougao hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT haojundeng hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT pengxu hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT jianding hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT zhengangwang hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion AT youwenlin hydroecologicalcontrolsonriverineorganiccarbondynamicsinthetropicalmonsoonregion
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Hydro-ecological controls on riverine organic carbon dynamics in the tropical monsoon region

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