Abstract
River networks receive a large fraction of the anthropogenic nitrogen applied to river catchments. The different impacts of the stream nitrogen (N) loading on nitrous oxide (N2O) emissions from various of aquatic ecosystems are still unknown. In this study, direct measurements of water–air interface N2O exchange in different water bodies were conducted. Results showed that the water–air interface N2O exchange from tributaries, hydropower station reservoirs, a main stream, and its estuary were 10.14 ± 13.51, 15.64 ± 10.72, 27.59 ± 20.99, and 15.98 ± 12.26 µg N2O-N m−2 h−1, respectively, indicating the strong impacts of human activities on N2O emission rates. The water NO2 −-N values predicted the dissolved N2O concentrations better than did the NO3 −-N and NH4 +-N values, indicating strong denitrification and nitrification processes. The dissolved inorganic N explained 36 % of the variations in the N2O emissions for the whole river network.
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References
Beauchamp E (1997) Nitrous oxide emission from agricultural soils. Can J Soil Sci 77:113–123
Beaulieu JJ, Arango CP, Hamilton SK, Tank JL (2008) The production and emission of nitrous oxide from headwater streams in the Midwestern USA. Glob Change Biol 14:878–894
Beaulieu JJ, Arango CP, Tank JL (2009) The effects of season and agriculture on nitrous oxide production in headwater streams. J Environ Qual 38:637–646
Beaulieu JJ, Shuster WD, Rebholz JA (2010) Nitrous oxide emissions from a large, impounded river: the Ohio River. Environ Sci Technol 44:7527–7533
Beaulieu JJ, Tanka JL, Hamiltonb SK (2011) Nitrous oxide emission from denitrification in stream and river networks. Proc Natl Acad Sci USA 108:214–219
Cao WZ, Hong HS, Yue SP, Zhang Y, Ding Y (2003) Nutrient loss from an agricultural catchment and land scape modeling in southeast China. Bull Environ Contam Toxicol 71:761–767
Cao WZ, Hong HS, Yue SP (2005) Modelling agricultural nitrogen contributions to the Jiulong River estuary and coastal water. Glob Planet Change 47:111–121
Chen Y, Yuan DX, Li QL (2007) Determination of nitrous oxide in seawater by room temperature purge and trap-gas chromatography. Chin J Anal Chem 35:897
Clough TJ, Buckthought LE, Kelliher FM, Sherlock RR (2007) Diurnal fluctuations of dissolved nitrous oxide (N2O) concentrations and estimates of N2O emissions from a spring-fed river: implications for IPCC methodology. Glob Change Biol 13:1016–1027
Corredor JE, Morell JM, Bauza J (1999) Atmospheric nitrous oxide fluxes from mangrove sediments. Mar Pollut Bull 38:473–478
Galloway JN, Cowling EB (2002) Reactive nitrogen and the world: 200 years of change. Ambio 31:64–71
Groffman PM, Butterbach-Bahl K, Fulweiler RW, Gold AJ, Morse JL, Stander EK, Tague C, Tonitto C, Vidon P (2009) Challenges to incorporating spatially and temporally explicit phenomena (hotspots and hot moments) in denitrification models. Biogeochemistry 93:49–77
Hamilton SK, Ostrom NE (2007) Measurement of the stable isotope ratio of dissolved N2 in 15N tracer experiments. Limnol Oceanogr Methods 5:233–240
Mimami K (1987) Emission of nitrous oxide (N2O) from agro-ecosystem. Jpn Agric Res Q 21:22–27
Parry ML (2007) Climate change 2007: impacts, adaptation and vulnerability: contribution of working group II to the fourth assessment report of the Intergovernmental panel on climate change, vol 4. Cambridge University Press, Cambridge
Peterson BJ, Wollheim WM, Mulholland PJ, Webster JR, Meyer JL, Tank JL, Marti E, Bowden WB, Valett HM, Hershey AE, McDowell WH, Dodds WK, Hamilton SK, Gregory S, Morrall DD (2001) Control of nitrogen export from watersheds by headwater streams. Science 292:86–90
Seitzinger SP (1988) Denitrification in freshwater and coastal marine ecosystems: ecological and geochemical significance. Limnol Oceanogr 33:702–724
Seitzinger SP, Kroeze C (1998) Global distribution of nitrous oxide production and N inputs in freshwater and coastal marine ecosystems. Glob Biogeochem Cycles 12:93–113
Smith RL, Böhlke JK, Repert DA, Hart CP (2009) Nitrification and denitrification in a mid-western stream containing high nitrate: in situ assessment using tracers in dome-shaped incubation chambers. Biogeochemistry 96:189–208
Stow CA, Walker JT, Cardoch L, Spence P, Geron C (2005) N2O emissions from streams in the Neuse river watershed, North Carolina. Environ Sci Technol 39:6999–7004
Weiss RF, Price BA (1980) Nitrous oxide solubility in water and seawater. Mar Chem 8:347–359
Acknowledgments
We gratefully acknowledge the funding for this study from the Chinese Natural Science Foundation (41175130), the National Basic Research Program of China through Grant 2013CB956101, and the Ministry of Environmental Protection’s Public Welfare Projects (201309007). We thank the two anonymous reviewers for their valuable comments.
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Chen, J., Cao, W., Cao, D. et al. Nitrogen Loading and Nitrous Oxide Emissions from a River with Multiple Hydroelectric Reservoirs. Bull Environ Contam Toxicol 94, 633–639 (2015). https://doi.org/10.1007/s00128-015-1525-5
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DOI: https://doi.org/10.1007/s00128-015-1525-5