Advanced search
1 file | 1.20 MB

Nitrate sources and dynamics in a salinized river and estuary : a δ15N-NO₃⁻ and δ18O-NO₃⁻ isotope approach

Dongmei Xue (UGent) , Pascal Boeckx (UGent) and Z Wang
(2014) BIOGEOSCIENCES. 11(20). p.5957-5967
Author
Organization
Abstract
To trace NO3- sources and assess NO3- dynamics in salinized rivers and estuaries, three rivers (Haihe River: HH River, Chaobaixin River: CB River and Jiyun River: JY River) and two estuaries (HH Estuary and CJ Estuary) along the Bohai Bay (China) have been selected to determine dissolved inorganic nitrogen (DIN: NH4+, NO2- and NO3-. Upstream of the HH River, NO3- was removed 30.9 +/- 22.1% by denitrification, resulting from effects of the floodgate: limiting water exchange with downstream and prolonging water residence time to remove NO3-. Downstream of the HH River NO3- was removed 2.5 +/- 13.3% by NO3- turnover processes. Conversely, NO3- was increased 36.6 +/- 25.2% by external N source addition in the CB River and 34.6 +/- 35.1% by instream nitrification in the JY River. The HH and CY Estuaries behaved mostly conservatively excluding the sewage input in the CJ Estuary. Hydrodynamics in estuaries has been changed by the ongoing reclamation projects, aggravating the loss of the attenuation function of NO3- in the estuary.
Keywords
NITROGEN, DENITRIFICATION, SEINE RIVER, TIDAL ESTUARIES, FRESH-WATER, COASTAL, SYSTEM, NITRIFICATION, FRACTIONATION, GROUNDWATER

Downloads

  • Xue Nitrate sources.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 1.20 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Xue, Dongmei, Pascal Boeckx, and Z Wang. 2014. “Nitrate Sources and Dynamics in a Salinized River and Estuary : a δ15N-NO₃ and δ18O-NO₃ Isotope Approach.” Biogeosciences 11 (20): 5957–5967.
APA
Xue, D., Boeckx, P., & Wang, Z. (2014). Nitrate sources and dynamics in a salinized river and estuary : a δ15N-NO₃ and δ18O-NO₃ isotope approach. BIOGEOSCIENCES, 11(20), 5957–5967.
Vancouver
1.
Xue D, Boeckx P, Wang Z. Nitrate sources and dynamics in a salinized river and estuary : a δ15N-NO₃ and δ18O-NO₃ isotope approach. BIOGEOSCIENCES. 2014;11(20):5957–67.
MLA
Xue, Dongmei, Pascal Boeckx, and Z Wang. “Nitrate Sources and Dynamics in a Salinized River and Estuary : a δ15N-NO₃ and δ18O-NO₃ Isotope Approach.” BIOGEOSCIENCES 11.20 (2014): 5957–5967. Print.
@article{5871048,
  abstract     = {To trace NO3- sources and assess NO3- dynamics in salinized rivers and estuaries, three rivers (Haihe River: HH River, Chaobaixin River: CB River and Jiyun River: JY River) and two estuaries (HH Estuary and CJ Estuary) along the Bohai Bay (China) have been selected to determine dissolved inorganic nitrogen (DIN: NH4+, NO2- and NO3-. Upstream of the HH River, NO3- was removed 30.9 +/- 22.1\% by denitrification, resulting from effects of the floodgate: limiting water exchange with downstream and prolonging water residence time to remove NO3-. Downstream of the HH River NO3- was removed 2.5 +/- 13.3\% by NO3- turnover processes. Conversely, NO3- was increased 36.6 +/- 25.2\% by external N source addition in the CB River and 34.6 +/- 35.1\% by instream nitrification in the JY River. The HH and CY Estuaries behaved mostly conservatively excluding the sewage input in the CJ Estuary. Hydrodynamics in estuaries has been changed by the ongoing reclamation projects, aggravating the loss of the attenuation function of NO3- in the estuary.},
  author       = {Xue, Dongmei and Boeckx, Pascal and Wang, Z},
  issn         = {1726-4170},
  journal      = {BIOGEOSCIENCES},
  keyword      = {NITROGEN,DENITRIFICATION,SEINE RIVER,TIDAL ESTUARIES,FRESH-WATER,COASTAL,SYSTEM,NITRIFICATION,FRACTIONATION,GROUNDWATER},
  language     = {eng},
  number       = {20},
  pages        = {5957--5967},
  title        = {Nitrate sources and dynamics in a salinized river and estuary : a \ensuremath{\delta}15N-NO\unmatched{2083}\unmatched{207b} and \ensuremath{\delta}18O-NO\unmatched{2083}\unmatched{207b} isotope approach},
  url          = {http://dx.doi.org/10.5194/bg-11-5957-2014},
  volume       = {11},
  year         = {2014},
}

Altmetric
View in Altmetric
Web of Science
Times cited: