The role of highly sratified nutrient-rich small estuaries as a source of dissolved inorganic nitrogen to coastal seawater, the Qishon (SE Mediterranean) case

Efrat Eliani-Russak; Barak Herut; Orit Sivan

doi:10.1016/j.marpolbul.2013.02.001

The role of highly sratified nutrient-rich small estuaries as a source of dissolved inorganic nitrogen to coastal seawater, the Qishon (SE Mediterranean) case

Efrat Eliani-Russak, Barak Herut, Orit Sivan

Research output: Contribution to journal › Article › peer-review

Abstract

We studied the role of small, highly stratified, sulfate and nutrient enriched estuaries, as a source or sink of inorganic nitrogen species, using the Qishon estuary at the Mediterranean coast of Israel, as a case study. Measurements of nutrient concentrations, δ¹⁵N and δ¹⁸O of nitrate+nitrite, δ¹³CDIC and δ¹⁸OH₂O were performed during 2008-2009 along the upper-fresh and lower-saline water masses, as well as sediment porewater depth-profiles. Such estuaries are characterized by relatively low removal flux of NO3- (via sedimentary denitrification) and enhanced (×3) upward flux of NH4+ (via sulfate reduction), attributed to the penetration of seawater of low NO3- and high dissolved oxygen and sulfate concentrations. The role of such small estuaries in releasing dissolved inorganic nitrogen, especially in sensitive oligotrophic areas as the Levantine basin and in the long-term, as a result of enhanced seawater penetration due to the expected sea level rise, has important environmental policy implications.

Original language	English
Pages (from-to)	250-258
Number of pages	9
Journal	Marine Pollution Bulletin
Volume	71
Issue number	1-2
DOIs	https://doi.org/10.1016/j.marpolbul.2013.02.001
State	Published - 2013
Externally published	Yes

Bibliographical note

Funding Information:
We would like to thank Yaron Gertner for dedicated assistance during field sampling as well as Lora Israelov for nutrient concentration analysis, at Israel Oceanographic and Limnological Research Institute. This work was supported by grants from Israel Ministries of Energy and Water (Grant No. 87168511 ) and Environmental Protection.

Keywords

East Mediterranean
Isotopes
Nitrogen
Nutrients
Pollution
Small estuaries

ASJC Scopus subject areas

Oceanography
Aquatic Science
Pollution

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.marpolbul.2013.02.001

Cite this

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abstract = "We studied the role of small, highly stratified, sulfate and nutrient enriched estuaries, as a source or sink of inorganic nitrogen species, using the Qishon estuary at the Mediterranean coast of Israel, as a case study. Measurements of nutrient concentrations, δ15N and δ18O of nitrate+nitrite, δ13CDIC and δ18OH2O were performed during 2008-2009 along the upper-fresh and lower-saline water masses, as well as sediment porewater depth-profiles. Such estuaries are characterized by relatively low removal flux of NO3- (via sedimentary denitrification) and enhanced (×3) upward flux of NH4+ (via sulfate reduction), attributed to the penetration of seawater of low NO3- and high dissolved oxygen and sulfate concentrations. The role of such small estuaries in releasing dissolved inorganic nitrogen, especially in sensitive oligotrophic areas as the Levantine basin and in the long-term, as a result of enhanced seawater penetration due to the expected sea level rise, has important environmental policy implications.",

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author = "Efrat Eliani-Russak and Barak Herut and Orit Sivan",

note = "Funding Information: We would like to thank Yaron Gertner for dedicated assistance during field sampling as well as Lora Israelov for nutrient concentration analysis, at Israel Oceanographic and Limnological Research Institute. This work was supported by grants from Israel Ministries of Energy and Water (Grant No. 87168511 ) and Environmental Protection. ",

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AU - Sivan, Orit

N1 - Funding Information: We would like to thank Yaron Gertner for dedicated assistance during field sampling as well as Lora Israelov for nutrient concentration analysis, at Israel Oceanographic and Limnological Research Institute. This work was supported by grants from Israel Ministries of Energy and Water (Grant No. 87168511 ) and Environmental Protection.

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N2 - We studied the role of small, highly stratified, sulfate and nutrient enriched estuaries, as a source or sink of inorganic nitrogen species, using the Qishon estuary at the Mediterranean coast of Israel, as a case study. Measurements of nutrient concentrations, δ15N and δ18O of nitrate+nitrite, δ13CDIC and δ18OH2O were performed during 2008-2009 along the upper-fresh and lower-saline water masses, as well as sediment porewater depth-profiles. Such estuaries are characterized by relatively low removal flux of NO3- (via sedimentary denitrification) and enhanced (×3) upward flux of NH4+ (via sulfate reduction), attributed to the penetration of seawater of low NO3- and high dissolved oxygen and sulfate concentrations. The role of such small estuaries in releasing dissolved inorganic nitrogen, especially in sensitive oligotrophic areas as the Levantine basin and in the long-term, as a result of enhanced seawater penetration due to the expected sea level rise, has important environmental policy implications.

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The role of highly sratified nutrient-rich small estuaries as a source of dissolved inorganic nitrogen to coastal seawater, the Qishon (SE Mediterranean) case

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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