Fisher T R, Morrissey K M. A new method for the recovery of ammonium from natural waters for measurement of 15N composition in isotope dilution experiments[J]. Marine Chemistry, 1985, 16: 11-21.
[2]
Kristiansen S, Paasche E. An improved method for determining relative 15N abundance in ammonium regeneration studies by direct diffusion[J]. Marine Ecology Progress Series, 1989, 54: 203-207.
[3]
Lory J A, Russelle M P. Evaluation of diffusion method for preparing low nitrogen samples for 15N analysis[J]. Soil Science Society of America Journal, 1994, 58: 1 400-1 404.
[4]
Sigman D M, Altabet M A, Michener R H, et al. Natural abundance-level measurement of the nitrogen isotopic composition of oceanic nitrate: An adaptation of the ammonia diffusion method[J]. Marine Chemistry, 1997, 57: 227-242.
[5]
Chang C C Y, Langston J, Riggs M, et al. A method for nitrate collection for 15N and 18O analyses from waters with low nitrate concentrations[J]. Canadian Journal of Fisheries and Aquatic Sciences, 1999, 56: 1 856-1 864.
[6]
Silva S R, Kendall C, Wilkison D H, et al. A new method for collection of nitrate from fresh water and the analysis of nitrogen and oxygen isotope ratios[J]. Journal of Hydrology, 2000, 228: 22-36.
[7]
Sigman D M, Casciotti K L, Andreani M, et al. A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater[J]. Analytical Chemistry,2001, 73(17): 4 145-4 153.
[8]
Zhang Cuiyun, Zhang Junxia, Ma Linna, et al. Advances in the study of the denitrifier method for the measurement of isotopic compositions of nitrate[J]. Advances in Earth Science,2010,25(4):360-364.[张翠云,张俊霞,马琳娜,等. 硝酸盐氮氧同位素反硝化细菌法测试研究[J]. 地球科学进展, 2010, 25(4): 360-364.]
[9]
McIlvin M R, Altabet M A. Chemical conversion of nitrate and nitrite to nitrous oxide for nitrogen and oxygen isotopic analysis in freshwater and seawater[J]. Analytical Chemistry, 2005, 77(17): 5 589-5 595.
[10]
Mutchler T, Dunton K H, Townsend-Small A, et al. Isotopic and elemental indicators of nutrient sources and status of coastal habitats in the Caribbean Sea, Yucatan Peninsula, Mexico[J]. Estuarine, Coastal and Shelf Science, 2007, 74(3): 449-457.
[11]
Tsunogai U, Kido T, Hirota A, et al. Sensitive determinations of stable nitrogen isotopic composition of organic nitrogen through chemical conversion into N2O[J]. Rapid Communications in Mass Spectrometry, 2008, 22(3): 345-354.
[12]
Hadas O, Altabet M A, Agnihotri R. Seasonally varying nitrogen isotope biogeochemistry of particulate organic matter in Lake Kinneret, Israel[J]. Limonology and Oceanography, 2009, 54(1): 75-85.
[13]
Emeis K C, Mara P, Schlarbaum T, et al. External N inputs and internal N cycling traced by isotope ratios of nitrate, dissolved reduced nitrogen, and particulate nitrogen in the eastern Mediterranean Sea[J]. Journal of Geophysical Research, 2010, 115, G04041, doi: 10.1029/2009JG001214.
[14]
Brunelle B G, Sigman D M, Jaccard S L, et al. Glacial/interglacial changes in nutrient supply and stratification in the western subarctic North Pacific since the penultimate glacial maximum[J]. Quaternary Science Reviews, 2010, 29(19/20): 2 579-2 590.
[15]
Knapp A N, Sigman D M, Lipschultz F, et al. Interbasin isotopic correspondence between upper-ocean bulk DON and subsurface nitrate and its implications for marine nitrogen cycling[J]. Global Biogeochemical Cycles, 2011, 25, GB4004, doi: 10.1029/2010GB003878.
[16]
Altabet M A, Deuser W G, Honjo S,et al. Seasonal and depth-related changes in the source of sinking particles in the North Atlantic[J].Nature,1991, 354: 136-139.
[17]
Altabet M A, Francois R. Sedimentary nitrogen isotopic ratio as a recorder for surface ocean nitrate utilization[J]. Global Biogeochemical Cycles, 1994, 8: 103-116.
[18]
Altabet M A, Pilskaln C, Thunell R, et al. The nitrogen isotope biogeochemistry of sinking particles from the margin of the eastern North Pacific[J]. Deep Sea Research, 1999, 46: 655-679.
[19]
Yoshikawa C, Yamanaka Y, Nakatsuka T. Nitrate-nitrogen isotopic patterns in surface waters of the western and central equatorial Pacific[J].Journal of Oceanography,2006, 62: 511-525.
[20]
Sigman D M, Altabet M A, McCorkle D C, et al. The δ15N of nitrate in the Southern Ocean: Consumption of nitrate in surface waters[J]. Global Biogeochemical Cycles, 1999, 13(4): 1 149-1 166.
[21]
Altabet M A. Nitrogen isotopic evidence for micronutrient control of fractional NO-3 utilization in the equatorial Pacific[J]. Limnology and Oceanography, 2001, 46: 368-380.
[22]
Karsh K L, Trull T W, Lourey M J, et al. Relationship of nitrogen isotope fractionation to phytoplankton size and iron availability during the Southern Ocean Iron Release Experiment (SOIREE)[J].Limnology and Oceanography,2003,48:1 058-1 068.
[23]
DiFiore P J, Sigman D M, Trull T W, et al. Nitrogen isotope constraints on subantarctic biogeochemistry[J]. Journal of Geophysical Research, 2006, 111, C08016, doi: 10.1029/2005JC003216.
[24]
Francois R, Altabet M A, Burkle L H. Glacial to interglacial changes in surface nitrate utilization in the Indian sector of the Southern Ocean as recorded by sediment δ15N[J].Paleoceanography, 1992, 7: 589-606.
[25]
Farrell J W, Pedeson T F, Calvert S E, et al. Glacial-interglacial changes in nutrient utilization in the equatorial Pacific Ocean[J]. Nature,1995, 377: 514 -517.
[26]
Granger J, Sigman D M, Needoba J A, et al. Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton[J]. Limnology and Oceanography, 2004, 49: 1 763-1 773.
[27]
Needoba J A, Harrison P J. Influence of low light and a light: Dark cycle on NO-3 uptake, intracellular NO-3, and nitrogen isotope fractionation by marine phytoplankton[J]. Journal of Phycology, 2004, 40:505-516.
[28]
Needoba J A, Sigman D M, Harrison P J. The mechanism of isotope fractionation during algal nitrate assimilation as illuminated by the 15N/14N of intracellular nitrate[J]. Journal of Phycology, 2004, 40: 517-522.
[29]
Somes C, Schmittner A, Altabet M A. Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean[J]. Geophysical Research Letters, 2010, 37, L23605, doi: 10.1029/2010GL044537.
[30]
Hoering T, Ford H T. The isotope effect in the fixation of nitrogen by Azotobacter[J]. Journal of the American Chemical Society, 1960, 82: 376-378.
[31]
Voss M, Dippner J W, Montoya J P. Nitrogen isotope patterns in the oxygen-deficient waters of the Eastern Tropical North Pacific Ocean[J]. Deep Sea Research, 2001, 48: 1 905-1 921.
[32]
Sigman D M, Robinson R, Knapp A N, et al. Distinguishing between water column and sedimentary denitrification in the Santa Barbara Basin using the stable isotopes of nitrate[J]. Geochemistry Geophysics Geosystems, 2003, 4: 1 040-1 059.
[33]
Brandes J A, Devol A H. Isotopic fractionation of oxygen and nitrogen in coastal marine sediments[J]. Geochimica et Cosmochimica Acta, 1997, 61: 1 793-1 801.
[34]
Sebilo M G, Billen M, Grably M, et al. Isotopic composition of nitrate-nitrogen as a marker of riparian and benthic denitrification at the scale of the whole Seine River system [J]. Biogeochemistry, 2003, 63: 35-51.
[35]
Lehmann M F, Sigman D M, Berelson W M. Coupling the 15N/14N and 18O/16O of nitrate as a constraint on benthic nitrogen cycling[J]. Marine Chemistry, 2004, 88(1/2): 1-20.
[36]
Brandes J A, Devol A H. A global marine-fixed nitrogen isotopic budget: Implications for Holocene nitrogen cycling[J]. Global Biogeochemical Cycles, 2002, 16(4): 120, doi: 10.1029/2001GB001856.
[37]
Deutsch C, Sigman D M, Thunell R C, et al. Stable isotope constraints on the glacial/interglacial oceanic nitrogen budget[J]. Global Biogeochemical Cycles, 2004, 18, GB4012, doi: 10.1029/2003GB002189.
[38]
Altabet M A. Isotopic tracers of the marine nitrogen cycle: Present and past[J]. The Handbook of Environmental Chemistry, 2006, 2: 251-293.
[39]
Altabet M A. Constraints on oceanic N balance/imbalance from sedimentary 15N records[J]. Biogeosciences, 2007, 4: 75-86.
[40]
Sigman D M, Granger J, DiFiore P J, et al. Coupled nitrogen and oxygen isotope measurements of nitrate along the North Pacific margin[J]. Global Biogeochemical Cycles, 2005, 19, GB4022, doi: 10.1029/2005GB002458.
[41]
Deutsch C, Gruber N, Key R M, et al. Denitrification and N2 fixation in the Pacific Ocean[J]. Global Biogeochemical Cycles, 2001, 15: 483-506.
[42]
Granger J, Prokopenko M G, Sigman D M, et al. Coupled nitrification-denitrification in sediment of the eastern Bering Sea shelf leads to 15N enrichment of fixed N in shelf waters[J]. Journal of Geophysical Research, 2011,116, C11006, doi: 10.1029/2010JC006751.
[43]
Casciotti K L, McIlvin M R. Isotopic analyses of nitrate and nitrite from reference mixtures and application to Eastern Tropical North Pacific waters[J]. Marine Chemistry, 2007, 107: 184-201.
[44]
Deng Lin, Cao Yuqing, Wang Wenke. An overview of the study on nitrogen and oxygen isotopes of nitrate in groundwater[J]. Advances in Earth Science, 2007, 22(7): 716-724.[邓林,曹玉清,王文科. 地下水NO-3氮与氧同位素研究进展[J]. 地球科学进展,2007, 22(7): 716-724.]
[45]
Chen Fajin, Li Xuehui, Jia Guodong. The application of nitrogen and oxygen isotopes in the study of nitrate in rivers[J]. Advances in Earth Science, 2007, 22(12): 1 251-1 257.[陈法锦,李学辉,贾国东. 氮氧同位素在河流硝酸盐研究中的应用[J]. 地球科学进展,2007,22(12):1 251-1 257.]
[46]
Jia Xiaofang, Li Yuzhong, Xu Chunying, et al. Research advances in N, O isotope and sources of nitrate in groundwater[J]. Chinese Agricultural Science Bulletin, 2009, 25(14): 233-239.[贾小妨,李玉中,徐春英,等. 氮、氧同位素与地下水中硝酸盐溯源研究进展[J]. 中国农学通报,2009,25(14):233-239.]
[47]
Zhang Run, Chen Min. Advances in marine biological nitrogen fixation studies[J].Journal of Oceanography in Taiwan Strait,2010, 29(3):428-433.[张润,陈敏.海洋生物固氮作用研究进展[J].台湾海峡,2010,29(3):428-433.]
[48]
Liu K K, Kaplan I R. The eastern tropical Pacific as a source of 15N-enriched nitrate in seawater off southern California[J]. Limnology and Oceanography,1989, 34: 820-830.
[49]
Sigman D M, Altabet M A, McCorkle D C, et al. The δ15N of nitrate in the Southern Ocean: Nitrogen cycling and circulation in the ocean interior[J]. Journal of Geophysical Research, 2000, 105: 19 599-19 614.
[50]
Casciotti K L, Sigman D M, Hastings M G, et al. Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method[J]. Analytical Chemistry, 2002, 74: 4 905-4 912.
[51]
Lehmann M F, Sigman D M, McCorkle D C, et al. Origin of the deep Bering Sea nitrate deficit: Constraints from the nitrogen and oxygen isotopic composition of water column nitrate and benthic nitrate fluxes[J]. Global Biogeochemical Cycles, 2005, 19, GB4005, doi: 10.1029/2005GB002508.
[52]
Cline J D, Kaplan I R. Isotopic fractionation of dissolved nitrate during denitrification in the eastern tropical North Pacific Ocean[J]. Marine Chemistry, 1975, 3(4): 271-299.
[53]
Horrigan S G, Montoya J P, Nevins J L, et al. Natural isotopic composition of dissolved inorganic nitrogen in the Chesapeake Bay[J]. Estuarine Coastal Shelf Science, 1990, 30: 393-410.
[54]
Liu K K, Su M J, Hsueh C R, et al. The nitrogen isotopic composition of nitrate in the Kuroshio water north-east of Taiwan: Evidence for nitrogen fixation as a source of isotopically light nitrate[J]. Marine Chemistry, 1996, 54: 273-292.
[55]
Wu J, Calvert S E, Wong C S. Nitrogen isotope variations in the northeast subarctic Pacific: Relationships to nitrate utilization and trophic structure[J]. Deep Sea Research, 1997, 44: 287-314.
[56]
Tanaka T, Saino T. Modified method for the analysis of nitrogen isotopic composition of oceanic nitrate at low concentration[J]. Journal of Oceanography, 2002, 58: 539-546.
[57]
Sutka R L, Ostrom N E, Ostrom P H, et al. Stable nitrogen isotope dynamics of dissolved nitrate in a transect from the North Pacific Subtropical Gyre to the Eastern Tropical North Pacific[J]. Geochimica et Cosmochimica Acta, 2004, 68: 517-524.
[58]
Delwiche C C, Zinke P J, Johnson C M, et al. Nitrogen isotope distribution as a presumptive indicator of nitrogen fixation[J]. Botanical Gazette, 1979, 140: 65-69.
[59]
Carpenter E J, Harvey H R, Fry B, et al. Biogeochemical tracers of the marine cyanobacterium Trichodesmium[J]. Deep Sea Research, 1997, 44(1): 27-38.
[60]
Karl D, Michaels A, Bergman B, et al. Dinitrogen fixation in the world′s oceans[J]. Biogeochemistry, 2002, 57/58: 47-98.
[61]
Knapp A N, DiFiore P J, Deutsch C, et al. Nitrate isotopic composition between Bermuda and Puerto Rico: Implications for N2 fixation in the Atlantic Ocean[J]. Global Biogeochemical Cycles, 2008, 22, GB3014,doi: 10.1029/2004GB002320.
[62]
Brandes J A, Devol A H, Yoshinari T, et al. Isotopic composition of nitrate in the central Arabian Sea and eastern tropical North Pacific: A tracer for mixing and nitrogen cycles[J]. Limnology and Oceanography, 1998, 42: 1 680-1 689.