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Last Update :2021.05.17  

PUBLICATION

*Japanese articles are not listed on this page. 

Peer-Reviewed Papers

  • Ishikawa, N.F., Ogawa, N.O., Chikaraishi, Y., Yamaguchi, M., Fujikura, K., Miyairi, Y., Yokoyama, Y., Nagata, T. and Ohkouchi, N. (2021) Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions. Frontiers in Marine Science, 8:641282. doi:10.3389/fmars.2021.641282. [Open Access]
  • Blattmann, T.M., and Ishikawa, N.F. (2020) Theoretical Amino Acid-Specific Radiocarbon Content in the Environment: Hypotheses to Be Tested and Opportunities to Be Taken. Frontiers in Marine Science, 7:302. doi:10.3389/fmars.2020.00302. [Open Access]
  • Blattmann, T.M., Montluçon, D.B., Haghipour, N., Ishikawa, N.F., and Eglinton, T.I. (2020) Liquid Chromatographic Isolation of Individual Amino Acids Extracted From Sediments for Radiocarbon Analysis. Frontiers in Marine Science, 7:174. doi:10.3389/fmars.2020.00174. [Abstract]
  • Ishikawa, N.F., Finlay, J.C., Uno, H., Ogawa, N.O., Ohkouchi, N., Tayasu, I., and Power, M.E. (2020) Combined use of radiocarbon and stable carbon isotopes for the source mixing model in a stream food web. Limnology and Oceanography, 65(11), 2688-2696. doi:10.1002/lno.11541. [Abstract]
  • Matsubayashi, J., Osada, Y., Tadokoro, K., Abe, Y., Yamaguchi, A., Shirai, K., Honda, K., Yoshikawa, C., Ogawa, N.O., Ohkouchi, N., Ishikawa, N.F., Nagata, T., Miyamoto, H., Nishino, S., and Tayasu, I. (2020) Tracking long‐distance migration of marine fishes using compound‐specific stable isotope analysis of amino acids. Ecology Letters, 23(5), 881-890. doi:10.1111/ele.13496. [Abstract]
  • Sun, Y., Ishikawa, N.F., Ogawa, N.O., Kawahata, H., Takano, Y., and Ohkouchi, N. (2020) A method for stable carbon isotope measurement of underivatized individual amino acids by multi‐dimensional high‐performance liquid chromatography and elemental analyzer/isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 34(20), e8885. doi:10.1002/rcm.8885. [Abstract]
  • Ishikawa, N.F., Butman, D., and Raymond, P.A. (2019) Radiocarbon age of different photoreactive fractions of freshwater dissolved organic matter. Organic Geochemistry, 135, 11-15. doi:10.1016/j.orggeochem.2019.06.006.[Abstract]
  • Haghipour, N., Ausin, B., Usman, M., Ishikawa, N.F., Wacker, L., Welte, C., Ueda, K., and Eglinton, T.I. (2018) Compound-Specific Radiocarbon Analysis (CSRA) by Elemental AnalyzerAccelerator Mass Spectrometry (EA-AMS): Precision and Limitations. Analytical Chemistry, 91(3), 2042-2049. doi:10.1021/acs.analchem.8b04491. [Abstract]
  • Ishikawa, N.F. (2018) Use of compound-specific nitrogen isotope analysis of amino acids in trophic ecology: assumptions, applications, and implications. Ecological Research, 33(5), 825-837. doi:10.1007/s11284-018-1616-y. [Open Access]
  • Ishikawa, N.F., Chikaraishi, Y., Takano, Y., Sasaki, Y., Takizawa, Y., Tsuchiya, M., Tayasu, I., Nagata, T., and Ohkouchi, N. (2018) A new analytical method for determination of the nitrogen isotopic composition of methionine: Its application to aquatic ecosystems with mixed resources. Limnology and Oceanography: Methods, 16(9), 607-620. doi:10.1002/lom3.10272. [Open Access]
  • Ishikawa, N.F., Itahashi, Y., Blattmann, T.M., Takano, Y., Ogawa, N.O., Yamane, M., Yokoyama, Y., Nagata, T., Yoneda, M., Haghipour, N., Eglinton, T.I., and Ohkouchi, N. (2018) Improved method for isolation and purification of underivatized amino acids for radiocarbon analysis. Analytical Chemistry, 90(20), 12035-12041. doi:10.1021/acs.analchem.8b02693. [Abstract]
  • Kato, Y., Kondoh, M., Ishikawa, N.F., Togashi, H., Kohmatsu, Y., Yoshimura, M., Yoshimizu, C., Haraguchi, T.F., Osada, Y., Ohte, N., Tokuchi, N., Okuda, N., Miki, T., and Tayasu, I. (2018) Using food network unfolding to evaluate food-web complexity in terms of biodiversity: theory and applications. Ecology Letters, 21, 1065-1074. doi:10.1111/ele.12973. [Abstract]
  • Ko, C.-Y., Iwata, T., Lee, J.-Y., Murakami, A., Okano, J., Ishikawa, N.F., Sakai, Y., Tayasu, I., Itoh, M., Song, U., Togashi, H., Nakano, S., Ohte, N., and Okuda, N. (2018) Assessing alpha and beta diversities of benthic macroinvertebrates and their environmental drivers between watersheds with different levels of habitat transformation in Japan. Marine and Freshwater Research, 70(4), 504-512. doi:10.1071/MF18031. [Abstract]
  • McCallister, S.L., Ishikawa, N.F., and Kothawala, D.N. (2018) Biogeochemical tools for characterizing organic carbon in inland aquatic ecosystems. Limnology and Oceanography Letters, 3(6), 444-457. doi:10.1002/lol2.10097. [Open Access]
  • Ishikawa, N.F., Chikaraishi, Y., Ohkouchi, N., Murakami, A.R., Tayasu, I., Togashi, H., Okano, J., Sakai, Y., Iwata, T., Kondoh, M., and Okuda, N. (2017) Integrated trophic position decreases in more diverse communities of stream food webs. Scientific Reports, 7:2130. doi:10.1038/s41598-017-02155-8. [Open Access]
  • Ishikawa, N.F., Hayashi, F., Sasaki, Y., Chikaraishi, Y., and Ohkouchi, N. (2017) Trophic discrimination factor of nitrogen isotopes within amino acids in the dobsonfly Protohermes grandis (Megaloptera: Corydalidae) larvae in a controlled feeding experiment. Ecology and Evolution, 7(6), 1674-1679. doi:10.1002/ece3.2728. [Open Access]
  • Ishikawa, N.F., Togashi, H., Kato, Y., Yoshimura, M., Kohmatsu, Y., Yoshimizu, C., Ogawa, N.O., Ohte, N., Tokuchi, N., Ohkouchi, N., and Tayasu, I. (2016) Terrestrial-aquatic linkage in stream food webs along a forest chronosequence: multi-isotopic evidence. Ecology, 97(5), 1146-1158. doi:10.1890/15-1133.1. [Abstract]
  • Ishikawa, N.F., Yamane, M., Suga, H., Ogawa, N.O., Yokoyama, Y., and Ohkouchi, N. (2015) Chlorophyll a-specific Δ14C, δ13C and δ15N values in stream periphyton: implications for aquatic food web studies. Biogeosciences, 12(22), 6781-6789. doi:10.5194/bg-12-6781-2015. [Open Access]
  • Ishikawa, N.F., Tayasu, I., Yamane, M., Yokoyama, Y., Sakai, S., and Ohkouchi, N. (2015) Sources of dissolved inorganic carbon in two small streams with different bedrock geology: insights from carbon isotopes. Radiocarbon, 57(3), 449-458. doi:10.2458/azu_rc.57.18348. [Open Access]
  • Chikaraishi, Y., Steffan, S.A., Ogawa, N.O., Ishikawa, N.F., Sasaki, Y., Tsuchiya, M., and Ohkouchi, N. (2014) High-resolution food webs based on nitrogen isotopic composition of amino acids. Ecology and Evolution, 4(12), 2423-2449. doi:10.1002/ece3.1103. [Open Access]
  • Ishikawa, N.F., Kato, Y., Togashi, H., Yoshimura, M., Yoshimizu, C., Okuda, N., and Tayasu, I. (2014) Stable nitrogen isotopic composition of amino acids reveals food web structure in stream ecosystems. Oecologia, 175(3), 911-922. doi:10.1007/s00442-014-2936-4. [Open Access]
  • Ishikawa, N.F., Uchida, M., Shibata, Y., and Tayasu, I. (2014) Carbon storage reservoirs in watersheds support stream food webs via periphyton production. Ecology, 95(5), 1264-1271. doi:10.1890/13-0976.1. [Abstract]
  • Ishikawa, N.F., Hyodo, F., and Tayasu, I. (2013) Use of carbon-13 and carbon-14 natural abundances for stream food web studies. Ecological Research, 28(5), 759-769. doi:10.1007/s11284-012-1003-z. [Open Access]
  • Ishikawa, N.F., Doi, H., and Finlay, J.C. (2012) Global meta-analysis for controlling factors on carbon stable isotope ratios of lotic periphyton. Oecologia, 170(2), 541-549. doi:10.1007/s00442-012-2308-x. [Open Access]
  • Ishikawa, N.F., Uchida, M., Shibata, Y., and Tayasu, I. (2012) Natural C-14 provides new data for stream food-web studies: a comparison with C-13 in multiple stream habitats. Marine and Freshwater Research, 63(3), 210-217. doi:10.1071/MF11141. [Abstract]
  • Ishikawa, N.F., Uchida, M., Shibata, Y., and Tayasu, I. (2010) A new application of radiocarbon (14C) concentrations to stream food web analysis. Nuclear Instruments and Methods in Physics Research section B, 268, 1175-1178. doi:10.1016/j.nimb.2009.10.127. [Abstract]


Other Publications

  • Ishikawa, N.F., Doi, H., and Finlay, J.C. (2018) Global dataset for carbon and nitrogen stable isotope ratios of lotic periphyton. Ecological Research. [Data Paper]
  • Ishikawa, N.F., Nyffeler, R., Haghipour, N., Eglinton, T.I., and Ohkouchi, N. (2017) Compound-specific 14C analysis in ecology: Do trees recycle chlorophyll? Laboratry of Ion Beam Physics, ETH Zurich, Annual Report 2017. 44pp. [PDF]