Benthic nitrogen cycling in the North Sea

A. R. Rosales Villa*, T. D. Jickells, D. B. Sivyer, E. R. Parker, B. Thamdrup

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We present new data on the rates of sedimentary denitrification and its component processes (canonical denitrification, anammox and dissimilatory nitrate reduction to ammonium) for intertidal and subtidal sites in the North Sea using nitrogen isotope addition methods. We find overall average denitrification rates of 6.3 (range 0.4–10.6) µmol m−2 h−1, similar to those previously reported for this region and other temperate shelf environments. We find canonical denitrification to be the dominant (>90%) process of the three. At the subtidal sites, most of the denitrification is supported by nitrate generated within the sediments, while at the intertidal site the main source is from the water column. We go on to consider the impact of these rates on nitrogen cycling within the North Sea region and compare the sediment core incubation rate results to estimates derived from modelling approaches. Model rates are somewhat higher than those directly measured and we consider possible reasons for this.

OriginalsprogEngelsk
TidsskriftContinental Shelf Research
Vol/bind185
Sider (fra-til)31-36
Antal sider6
ISSN0278-4343
DOI
StatusUdgivet - 1. sep. 2019

Fingeraftryk

North Sea
denitrification
nitrogen
nitrate
sediments
nitrate reduction
nitrogen isotope
sediment core
isotopes
ammonium
water column
incubation
nitrates
sea
rate
sediment
modeling
water
methodology

Citer dette

Rosales Villa, A. R., Jickells, T. D., Sivyer, D. B., Parker, E. R., & Thamdrup, B. (2019). Benthic nitrogen cycling in the North Sea. Continental Shelf Research, 185, 31-36. https://doi.org/10.1016/j.csr.2018.05.005
Rosales Villa, A. R. ; Jickells, T. D. ; Sivyer, D. B. ; Parker, E. R. ; Thamdrup, B. / Benthic nitrogen cycling in the North Sea. I: Continental Shelf Research. 2019 ; Bind 185. s. 31-36.
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title = "Benthic nitrogen cycling in the North Sea",
abstract = "We present new data on the rates of sedimentary denitrification and its component processes (canonical denitrification, anammox and dissimilatory nitrate reduction to ammonium) for intertidal and subtidal sites in the North Sea using nitrogen isotope addition methods. We find overall average denitrification rates of 6.3 (range 0.4–10.6) µmol m−2 h−1, similar to those previously reported for this region and other temperate shelf environments. We find canonical denitrification to be the dominant (>90{\%}) process of the three. At the subtidal sites, most of the denitrification is supported by nitrate generated within the sediments, while at the intertidal site the main source is from the water column. We go on to consider the impact of these rates on nitrogen cycling within the North Sea region and compare the sediment core incubation rate results to estimates derived from modelling approaches. Model rates are somewhat higher than those directly measured and we consider possible reasons for this.",
keywords = "Anammox, Denitrification, DNRA, Nitrogen cycle, North Sea, Sediments",
author = "{Rosales Villa}, {A. R.} and Jickells, {T. D.} and Sivyer, {D. B.} and Parker, {E. R.} and B. Thamdrup",
year = "2019",
month = "9",
day = "1",
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Rosales Villa, AR, Jickells, TD, Sivyer, DB, Parker, ER & Thamdrup, B 2019, 'Benthic nitrogen cycling in the North Sea', Continental Shelf Research, bind 185, s. 31-36. https://doi.org/10.1016/j.csr.2018.05.005

Benthic nitrogen cycling in the North Sea. / Rosales Villa, A. R.; Jickells, T. D.; Sivyer, D. B.; Parker, E. R.; Thamdrup, B.

I: Continental Shelf Research, Bind 185, 01.09.2019, s. 31-36.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Benthic nitrogen cycling in the North Sea

AU - Rosales Villa, A. R.

AU - Jickells, T. D.

AU - Sivyer, D. B.

AU - Parker, E. R.

AU - Thamdrup, B.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We present new data on the rates of sedimentary denitrification and its component processes (canonical denitrification, anammox and dissimilatory nitrate reduction to ammonium) for intertidal and subtidal sites in the North Sea using nitrogen isotope addition methods. We find overall average denitrification rates of 6.3 (range 0.4–10.6) µmol m−2 h−1, similar to those previously reported for this region and other temperate shelf environments. We find canonical denitrification to be the dominant (>90%) process of the three. At the subtidal sites, most of the denitrification is supported by nitrate generated within the sediments, while at the intertidal site the main source is from the water column. We go on to consider the impact of these rates on nitrogen cycling within the North Sea region and compare the sediment core incubation rate results to estimates derived from modelling approaches. Model rates are somewhat higher than those directly measured and we consider possible reasons for this.

AB - We present new data on the rates of sedimentary denitrification and its component processes (canonical denitrification, anammox and dissimilatory nitrate reduction to ammonium) for intertidal and subtidal sites in the North Sea using nitrogen isotope addition methods. We find overall average denitrification rates of 6.3 (range 0.4–10.6) µmol m−2 h−1, similar to those previously reported for this region and other temperate shelf environments. We find canonical denitrification to be the dominant (>90%) process of the three. At the subtidal sites, most of the denitrification is supported by nitrate generated within the sediments, while at the intertidal site the main source is from the water column. We go on to consider the impact of these rates on nitrogen cycling within the North Sea region and compare the sediment core incubation rate results to estimates derived from modelling approaches. Model rates are somewhat higher than those directly measured and we consider possible reasons for this.

KW - Anammox

KW - Denitrification

KW - DNRA

KW - Nitrogen cycle

KW - North Sea

KW - Sediments

U2 - 10.1016/j.csr.2018.05.005

DO - 10.1016/j.csr.2018.05.005

M3 - Journal article

VL - 185

SP - 31

EP - 36

JO - Continental Shelf Research

JF - Continental Shelf Research

SN - 0278-4343

ER -