Sediment nitrogen fluxes and rates in the Pearl River Estuary region

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LI, Jiying; SUN, Jing; Yu, Liuqian, 2024, "Sediment nitrogen fluxes and rates in the Pearl River Estuary region", https://doi.org/10.14711/dataset/XMTKWW, DataSpace@HKUST, V3, UNF:6:vmin2pjYEElVJqGcQIuJxA== [fileUNF]

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Description	We collected water and sediment samples from the Pearl River Estuary and its adjacent coastal shelf. We measured dissolved oxygen, ammonium, and nitrate in the porewaters and particulate organic carbon and nitrogen. We estimate the sediment oxygen uptake using whole core incubations and estimate the diffusive fluxes of oxygen, ammonium and nitrate using Fick’s law of diffusion. The bioirrigated fluxes of ammonium and nitrate are calculated using total sediment uptake and diffusive oxygen flux, considering proportional bioirrigation and molecular diffusion coefficients. The rates of nitrification and N2 production were estimated using mass-balance model calculations. Data from the literature were also compiled for comparison. The compiled data include those from the Changjiang Estuary region (Song et al. 2021), the Northern Gulf of Mexico (Lehrter et al. 2012, MaCarthy et al. 2013 and 2015), the Gulf of St Lawrence Alkhatib et al. 2012, Thibodeau et al. 2010, Mazur et al. 2021), and the Chesapeake Bay (Boynton et al. 2018, 2019, and 2022). Details of the samples and methods are described in the metadata file. (2024-11-14)
Subject	Earth and Environmental Sciences
Keyword	coastal ocean, sediments, nitrogen cycle, The Pearl River Estuary
Notes	In this version, we calculated the bioirrigation flux of nitrate and ammonium, and the burial flux of ammonium. These fluxes are included in the mass-balance calculation of the rates. In the previous version, only molecular diffusive fluxes were considered.
License/Data Use Agreement	CC BY 4.0

	1 to 3 of 3 Files	Original Format Archival Format (.tab)
	Metadata-PRE N-JL.pdf Adobe PDF - 347.0 KB Published Apr 14, 2025 0 Downloads MD5: 4d7aa9f2628517c11db5bea5661b16db metadata file describing the samples and methods	Preview "Metadata-PRE N-JL.pdf" Access File File Access Public Download Options Adobe PDF Download Metadata Data File Citation EndNote XML RIS BibTeX
	PRE_sediment_N_flux_rate.tab Tabular Data - 35.2 KB Published Apr 14, 2025 0 Downloads 25 Variables, 406 Observations UNF:6:R9ELXStGPCbIyxaVFvNtTw== Sediment N flux and rates	Preview "PRE_sediment_N_flux_rate.tab" Access File File Access Public Download Options MS Excel Spreadsheet (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX
	PRE_sediment_O2_NO3_NH4.tab Tabular Data - 61.2 KB Published Apr 14, 2025 0 Downloads 19 Variables, 684 Observations UNF:6:4CKaDSMFMsEytTRpZXCyPQ== Sediment profiles of oxygen, nitrate, and ammonium	Preview "PRE_sediment_O2_NO3_NH4.tab" Access File File Access Public Download Options MS Excel Spreadsheet (Original File Format) Tab-Delimited RData Download Metadata Variable Metadata Data File Citation EndNote XML RIS BibTeX

Citation Metadata

Persistent Identifier	doi:10.14711/dataset/XMTKWW
Publication Date	2024-11-14
Title	Sediment nitrogen fluxes and rates in the Pearl River Estuary region
Author	LI, Jiying (The Hong Kong University of Science and Technology) - ORCID: 0000-0003-1677-6922 SUN, Jing (The Hong Kong University of Science and Technology) - ORCID: 0000-0002-7698-7679 Yu, Liuqian (The Hong Kong University of Science and Technology (Guangzhou)) - ORCID: 0000-0002-5492-8213
Point of Contact	Use email button above to contact. LI, Jiying (The Hong Kong University of Science and Technology)
Description	We collected water and sediment samples from the Pearl River Estuary and its adjacent coastal shelf. We measured dissolved oxygen, ammonium, and nitrate in the porewaters and particulate organic carbon and nitrogen. We estimate the sediment oxygen uptake using whole core incubations and estimate the diffusive fluxes of oxygen, ammonium and nitrate using Fick’s law of diffusion. The bioirrigated fluxes of ammonium and nitrate are calculated using total sediment uptake and diffusive oxygen flux, considering proportional bioirrigation and molecular diffusion coefficients. The rates of nitrification and N2 production were estimated using mass-balance model calculations. Data from the literature were also compiled for comparison. The compiled data include those from the Changjiang Estuary region (Song et al. 2021), the Northern Gulf of Mexico (Lehrter et al. 2012, MaCarthy et al. 2013 and 2015), the Gulf of St Lawrence Alkhatib et al. 2012, Thibodeau et al. 2010, Mazur et al. 2021), and the Chesapeake Bay (Boynton et al. 2018, 2019, and 2022). Details of the samples and methods are described in the metadata file. (2024-11-14)
Subject	Earth and Environmental Sciences
Keyword	coastal ocean sediments nitrogen cycle The Pearl River Estuary
Notes	In this version, we calculated the bioirrigation flux of nitrate and ammonium, and the burial flux of ammonium. These fluxes are included in the mass-balance calculation of the rates. In the previous version, only molecular diffusive fluxes were considered.
Funding Information	Research Grant Council (RGC) of the Hong Kong Special Administrative Region, China Center for Ocean Research in Hong Kong and Macau
Depositor	LI, Jiying
Deposit Date	2024-11-14
Date of Collection	Start: 2021-06-03 ; End: 2021-07-03
Related Dataset	LI, Jiying; SUN, Jing; YU, Liuqian; GAN, Jianping; YANG, Xingyu, 2024, "Sediment oxygen uptake and hypoxia in the Pearl River Estuary Region", https://doi.org/10.14711/dataset/KCLUQW, DataSpace@HKUST, V1, UNF:6:CkRCkLArRYmQqn66DS8NQw== [fileUNF]
Other Reference	Sun, J., L. Yu, X. Yang, J. Gan, H. Yin, and J. Li. 2024. Sediment oxygen uptake and hypoxia in coastal oceans, the Pearl River Estuary region. Water Res. 267: 122499. doi:10.1016/j.watres.2024.122499; Zhou, L. 2022. Sediment oxygen uptake and carbon mineralization in the Pearl River Estuary and adjacent coastal waters.doi:10.14711/thesis-991013088359403412; Boynton, W. R., M. A. C. Ceballos, C. L. S. Hodgkins, D. Liang, and J. M. Testa. 2022. Large-Scale Spatial and Temporal Patterns and Importance of Sediment–Water Oxygen and Nutrient Fluxes in the Chesapeake Bay Region. Estuaries Coasts 1–20. doi:10.1007/s12237-022-01127-0; Lehrter, J. C., D. L. Beddick, R. Devereux, D. F. Yates, and M. C. Murrell. 2012. Sediment-water fluxes of dissolved inorganic carbon, O2, nutrients, and N2 from the hypoxic region of the Louisiana continental shelf. Biogeochemistry 109: 233–252. doi:10.1007/s10533-011-9623-x; Mazur, C. I., A. N. Al-Haj, N. E. Ray, I. Sanchez-Viruet, and R. W. Fulweiler. 2021. Low denitrification rates and variable benthic nutrient fluxes characterize Long Island Sound sediments. Biogeochemistry 154: 37–62. doi:10.1007/s10533-021-00795-7; McCarthy, M. J., S. A. Carini, Z. Liu, N. E. Ostrom, and W. S. Gardner. 2013. Oxygen consumption in the water column and sediments of the northern Gulf of Mexico hypoxic zone. Estuar Coast Shelf Sci 123: 46–53. doi:10.1016/j.ecss.2013.02.019; McCarthy, M. J., S. E. Newell, S. A. Carini, and W. S. Gardner. 2015. Denitrification Dominates Sediment Nitrogen Removal and Is Enhanced by Bottom-Water Hypoxia in the Northern Gulf of Mexico. Estuaries Coasts 38: 2279–2294.; Song, G., S. Liu, J. Zhang, Z. Zhu, G. Zhang, H. K. Marchant, M. M. M. Kuypers, and G. Lavik. 2021. Response of benthic nitrogen cycling to estuarine hypoxia. Limnol Oceanogr 66: 652–666. doi:10.1002/lno.11630; Thibodeau, B., M. F. Lehmann, J. Kowarzyk, A. Mucci, Y. Gélinas, D. Gilbert, R. Maranger, and M. Alkhatib. 2010. Benthic nutrient fluxes along the Laurentian Channel: Impacts on the N budget of the St. Lawrence marine system. Estuar., Coast. Shelf Sci. 90: 195–205. doi:10.1016/j.ecss.2010.08.015

Geospatial Metadata

Geographic Coverage	China
Geographic Bounding Box	112.488 114.252 22.602 21.501

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