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Simultaneous Measurement of Nitrogen and Oxygen Isotopes of Nitrate to Evaluate Nitrate Sources and Processes in Catchments

Abstract

We review studies on applied isotope analytical techniques for identifying sources and transformations of river nitrate (NO{sub 3}{sup -}) to examine the influences of water pollution, excess nutrient (nitrogen) loads and ecosystem disturbances in river systems. We also discuss the current status and future perspectives of the application of NO{sub 3}{sup -} isotope measurements to the assessment of river nutrients. Our review shows that in recent years simultaneous measurements of nitrogen and oxygen isotopes ({delta}{sup 15}N and {delta}{sup 18}O) of NO{sub 3}{sup -} have been increasingly used to identify the sources and pathways of nitrogen in river systems. The {delta}{sup 15}N value of NO{sub 3}{sup -} is a useful indicator to evaluate the contributions of sewage and/or animal waste to NO{sub 3}{sup -} load, and the {delta}{sup 18}O value can be used for estimation of the contribution of NO{sub 3}{sup -} derived through atmospheric deposition. The microbial denitrification method is currently a most useful tool to measure the {delta}{sup 15}N and {delta}{sup 18}O values of NO{sub 3}{sup -} simultaneously, because of its capability for high throughput of samples. This method allows us to conduct a comprehensive investigation of spatial and temporal variations and mechanisms of nitrogen transport and transformation in  More>>
Authors:
Ohte, Nobuhito; [1]  Nagata, Toshi; Tayasu, Ichiro; [2]  Kyozu, Ayato; Yoshimizu, Chikage; [3]  Osaka, Ken'ichi [4] 
  1. Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo (Japan)
  2. Center for Ecological Research, Kyoto University, Ohtsu (Japan)
  3. CREST, Japan Science and Technology Agency, Center for Ecological Research, Kyoto University, Ohtsu (Japan)
  4. Carbon and Nutrient Cycles Division, National Institute for Agro-Environmental Sciences, Tsukuba, (Japan)
Publication Date:
May 15, 2013
Product Type:
Technical Report
Report Number:
IAEA-TECDOC-1695
Resource Relation:
Other Information: 8 figs., 1 tab., 83 refs.; Related Information: In: Application of Isotope Techniques for Assessing Nutrient Dynamics in River Basins| 250 p.
Subject:
54 ENVIRONMENTAL SCIENCES; 36 MATERIALS SCIENCE; DEPOSITION; DISTURBANCES; ECOSYSTEMS; EVALUATION; NITRATES; NITROGEN; NUTRIENTS; OXYGEN ISOTOPES; RIVERS; SEWAGE; WATER POLLUTION
OSTI ID:
22118965
Research Organizations:
International Atomic Energy Agency, Isotope Hydrology Section, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISBN 978-92-0-138810-0; ISSN 1011-4289; TRN: XA13R0663075601
Availability:
Available from INIS in electronic form. Also available on-line: http://www-pub.iaea.org/MTCD/publications/PDF/TE-1695_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 49-67
Announcement Date:
Aug 08, 2013

Citation Formats

Ohte, Nobuhito, Nagata, Toshi, Tayasu, Ichiro, Kyozu, Ayato, Yoshimizu, Chikage, and Osaka, Ken'ichi. Simultaneous Measurement of Nitrogen and Oxygen Isotopes of Nitrate to Evaluate Nitrate Sources and Processes in Catchments. IAEA: N. p., 2013. Web.
Ohte, Nobuhito, Nagata, Toshi, Tayasu, Ichiro, Kyozu, Ayato, Yoshimizu, Chikage, & Osaka, Ken'ichi. Simultaneous Measurement of Nitrogen and Oxygen Isotopes of Nitrate to Evaluate Nitrate Sources and Processes in Catchments. IAEA.
Ohte, Nobuhito, Nagata, Toshi, Tayasu, Ichiro, Kyozu, Ayato, Yoshimizu, Chikage, and Osaka, Ken'ichi. 2013. "Simultaneous Measurement of Nitrogen and Oxygen Isotopes of Nitrate to Evaluate Nitrate Sources and Processes in Catchments." IAEA.
@misc{etde_22118965,
title = {Simultaneous Measurement of Nitrogen and Oxygen Isotopes of Nitrate to Evaluate Nitrate Sources and Processes in Catchments}
author = {Ohte, Nobuhito, Nagata, Toshi, Tayasu, Ichiro, Kyozu, Ayato, Yoshimizu, Chikage, and Osaka, Ken'ichi}
abstractNote = {We review studies on applied isotope analytical techniques for identifying sources and transformations of river nitrate (NO{sub 3}{sup -}) to examine the influences of water pollution, excess nutrient (nitrogen) loads and ecosystem disturbances in river systems. We also discuss the current status and future perspectives of the application of NO{sub 3}{sup -} isotope measurements to the assessment of river nutrients. Our review shows that in recent years simultaneous measurements of nitrogen and oxygen isotopes ({delta}{sup 15}N and {delta}{sup 18}O) of NO{sub 3}{sup -} have been increasingly used to identify the sources and pathways of nitrogen in river systems. The {delta}{sup 15}N value of NO{sub 3}{sup -} is a useful indicator to evaluate the contributions of sewage and/or animal waste to NO{sub 3}{sup -} load, and the {delta}{sup 18}O value can be used for estimation of the contribution of NO{sub 3}{sup -} derived through atmospheric deposition. The microbial denitrification method is currently a most useful tool to measure the {delta}{sup 15}N and {delta}{sup 18}O values of NO{sub 3}{sup -} simultaneously, because of its capability for high throughput of samples. This method allows us to conduct a comprehensive investigation of spatial and temporal variations and mechanisms of nitrogen transport and transformation in rivers and catchments in more precise and effective manner. (author)}
place = {IAEA}
year = {2013}
month = {May}
}