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Associate Professor:Azumi Kuroyanagi

Associate Professor:Azumi Kuroyanagi

Assistant Professor:Azumi Kuroyanagi

Research field

Micropaleontology & paleoceanography

Research Interests

  •  Planktonic foraminifera as proxy for oceanic environment

Papers

Selected papers
  1. Kinoshita, S., Kuroyanagi, A., Kawahata, H., Fujita, K., Ishimura, T., Suzuki, A., Kano, H., Kubota, Y. & Nishi, H. (2023) Constant shell density of hyaline large benthic foraminifers under thermal stress. Marine Micropaleontology, 181, 102232.
  2. Chaabane, S., de Garidel-Thoron, T., Giraud, X., Schiebel, R., Beaugrand, G., Brummer, G. J., Casajus, N., Greco, M., Grigoratou, M., Howa, H., Jonkers, L., Kucera, M., Kuroyanagi, A., Meilland, J., Monteiro, F., Mortyn, G., Almogi-Labin, A., Asahi, H., Avnaim-Katav, S., Bassinot, F., & 27 others (2023) The FORCIS database: A global census of planktonic Foraminifera from ocean waters. Scientific data, 10, 1, 354.
  3. Maeda, A., Kuroyanagi, A., Iguchi, A., Gaye, B., Rixen, T., Nishi, H., Kawahata, H. (2022) Seasonal variation of fluxes of planktic foraminiferal tests collected by a time-series sediment trap in the central Bay of Bengal during three different years. Deep-Sea Research Part I: Oceanographic Research Papers, 183, 103718. DOI: 10.1016/j.dsr.2022.103718
  4. Maeda, A., Kuroyanagi, A., Yoshimura, T., Gaye, B., Rixen, T., Suzuki, A., Nishi, H., Kawahata, H. (2022) Calcification depths of planktic foraminifers constrained by geochemical signatures from sediment-trap samples from the Bay of Bengal. Earth and Space Science (ESS) Open Archive, September 13. DOI: 10.1002/essoar.10512383.1
  5. Kinoshita, S., Wang, Q., Kuroyanagi, A., Murayama, M., Ujiié, Y., Kawahata, H. (2022) Response of planktic foraminiferal shells to ocean acidification and global warming assessed using micro-X-ray computed tomography. Paleontological Research, 26(4), 390–404. DOI: 10.2517/pr200043
  6. de Garidel-Thoron, T., Chaabane, S., Giraud, X., Meilland, J., Jonkers, L., Kucera, M., Brummer, G-JA., Grigoratou, M., Monteiro, F.M., Greco, M., Mortyn, P.G., Kuroyanagi, A., Howa, H., Beaugrand, G., Schiebel, R. (2022) The Foraminiferal Response to Climate Stressors Project: Tracking the Community Response of Planktonic Foraminifera to Historical Climate Change. Frontiers in Marine Science, 9:827962. DOI: 10.3389/fmars.2022.827962
  7. Kuroyanagi, A., Irie, T., Kinoshita, S., Kawahata, H., Suzuki, A., Nishi, H., Sasaki, O., Takashima, R., Fujita, K. (2021) Decrease in volume and density of foraminiferal shells with progressing ocean acidification. Scientific Reports, 11, 19988. DOI: 10.1038/s41598-021-99427-1
  8. Kinoshita, S., Kuroyanagi, A., Kawahata, H., Fujita, K., Ishimura, T., Suzuki, A., Sasaki, O., Nishi, H. (2021) Temperature effects on the shell growth of a larger benthic foraminifer (Sorites orbiculus): Results from culture experiments and micro X-ray computed tomography. Marine Micropaleontol., 163, 101960. DOI: 10.1016/j.marmicro.2021.101960
  9. Kuroyanagi, A., Kawahata, H., Ozaki, K., Suzuki, A., Nishi, H., Takashima, R. (2020) What drove the evolutionary trend of planktic foraminifers during the Cretaceous: Oceanic Anoxic Events (OAEs) directly affected it? Marine Micropaleontology, 161, 101924. DOI: 10.1016/j.marmicro.2020.101924
  10. Arimoto, J., Nishi, H., Kuroyanagi, A., Takashima, R., Matsui, H., Ikehara, M. (2020) Changes in upper ocean hydrography and productivity across the Middle Eocene Climatic Optimum: Local insights and global implications from the Northwest Atlantic. Global and Planetary Change, 193, 103258. DOI: 10.1016/j.gloplacha.2020.103258
  11. Kuroyanagi, A., Toyofuku, T., Nagai, Y., Kimoto, K., Nishi, H., Takashima, R., Kawahata, H. (2019)　Effect of euxinic conditions on planktic foraminifers: Culture experiments and implications for past and future environments. Paleoceanography and Paleoclimatology, 34. DOI: 10.1029/2018PA003539
  12. Kawahata, H., Fujita, K., Iguchi, A., Inoue, M., Iwasaki, S., Kuroyanagi, A., Maeda1, A., Manaka, T., Moriya, K., Takagi, H., Toyofuku, T., Yoshimura, T., Suzuki, A. (2019). Perspective of the response by marine calcifiers to global warming and ocean acidification—Behavior of corals and foraminifers in the high CO2 world in “hot house”. Progress in Earth and Planetary Science, 5. DOI: 10.1186/s40645‐018‐0239‐9
  13. Iwasaki, S., Kimoto, K., Kuroyanagi, A., Kawahata, H. (2017) Horizontal and vertical distributions of planktic foraminifera in the subarctic Pacific. Marine Micropaleontology, 130, pp. 1-14. DOI: 10.1016/j.marmicro.2016.12.001
  14. Kawahata, H., Ishizaki, Y., Kuroyanagi, A., Suzuki, A., Ohkushi, K.-I. (2017) Quantitative reconstruction of temperature at a Jōmon site in the Incipient Jōmon Period in northern Japan and its implications for the production of early pottery and stone arrowheads. Quaternary Science Reviews, 157, pp. 66-79. DOI: 10.1016/j.quascirev.2016.12.009
  15. Matsui, H., Nishi, H., Kuroyanagi, A., Hayashi, H., Ikehara, M., Takashima, R. (2017) Vertical thermal gradient history in the eastern equatorial Pacific during the early to middle Miocene: Implications for the equatorial thermocline development. Paleoceanography, 32 (7), pp. 729-743. DOI: 10.1002/2016PA003058
  16. Uchimura, H., Nishi, H., Takashima, R., Kuroyanagi, A., Yamamoto, Y., Kutterolf, S. (2017) Distribution of Recent Benthic Foraminifera off Western Costa Rica in the Eastern Equatorial Pacific Ocean. Paleontological Research, 21 (4), pp. 380-396. DOI: 10.2517/2017PR003
  17. Yoshimura, T., Tamenori, Y., Suzuki, A., Kawahata, H., Iwasaki, N., Hasegawa, H., Nguyen, L.T., Kuroyanagi, A., Yamazaki, T., Kuroda, J., Ohkouchi, N. (2017) Altervalent substitution of sodium for calcium in biogenic calcite and aragonite. Geochimica et Cosmochimica Acta, 202, pp. 21-38. DOI: 10.1016/j.gca.2016.12.003
  18. Matsui, H., Nishi, H., Takashima, R., Kuroyanagi, A., Ikehara, M., Takayanagi, H., Iryu, Y. (2016) Changes in the depth habitat of the Oligocene planktic foraminifera (Dentoglobigerina venezuelana) induced by thermocline deepening in the eastern equatorial Pacific. Paleoceanography, 31 (6), pp. 715-731. DOI: 10.1002/2016PA002950
  19. Yoshimura, T., Tamenori, Y., Takahashi, O., Nguyen, L.T., Hasegawa, H., Iwasaki, N., Kuroyanagi, A., Suzuki, A., Kawahata, H. (2015) Mg coordination in biogenic carbonates constrained by theoretical and experimental XANES. Earth and Planetary Science Letters,421, 68-74. DOI: 10.1016/j.epsl.2015.03.048
  20. Kuroyanagi, A., da Rocha, R.E., Bijma, J., Spero, H., Russel, A.D., Eggins, S.M., Kawahata, H. (2013) Effect of dissolved oxygen concentration on planktonic foraminifera through laboratory culture experiments and implications for oceanic anoxic events. Marine Micropaleontology, Vol. 101, pp. 28-32. doi: 10.1016/j.marmicro.2013.04.005
  21. Kuroyanagi, A., da Rocha, R.E., Bijma, J., Spero, H., Russel, A.D., Eggins, S.M., Kawahata, H. (2013) Effect of dissolved oxygen concentration on planktonic foraminifera through laboratory culture experiments and implications for oceanic anoxic events. Marine Micropaleontology, Vol. 101, pp. 28-32. doi: 10.1016/j.marmicro.2013.04.005
  22. Sagawa, T., Kuroyanagi, A., Irino, T., Kuwae, M., Kawahata, H. (2013) Seasonal variations in planktonic foraminiferal flux and oxygen isotopic composition in the western North Pacific: Implications for paleoceanographic reconstruction. Marine Micropaleontology, Vol. 100, pp. 11-20. doi: 10.1016/j.marmicro.2013.03.013
  23. Kuroyanagi, A., Kawahata, H., Nishi, H. (2011) Seasonal variation in the oxygen isotopic composition of different-sized planktonic foraminifer Neogloboquadrina pachyderma (sin.) in the northwestern North Pacific, and implications for reconstruction of the paleo-environment. Paleoceanography. doi:10.1029/2011PA002153
  24. Dueñas-Bohórquez, A., da Rocha, R.E., Kuroyanagi, A., de Nooijer, L.J., Bijma, J., Reichart, G.J. (2011) Interindividual variability and ontogenetic effects on Mg and Sr incorporation in the planktonic foraminifer Globigerinoides sacculifer. Geoghimica et cosmochimica acta, Vol. 75, pp. 520-532. doi: 10.1016/j.gca.2010.10.006
  25. Kawahata, H., Ohshima, H., Kuroyanagi, A. (2011) Terrestrial - ocean environmental change in the northwestern Pacific from the glacial times to Holocene. Asian Earth Science, Vol. 40, pp. 1189-1202. doi: 10.1016/j.jseaes.2010.10.007
  26. Hikami, M., Ushie, H., Irie, T., Fujita, K., Kuroyanagi, A., Nojiri, H., Sakai, K., Suzuki, A., Kawahata, H. (2011) Contrasting calcification responses to ocean acidification between two reef foraminifers harboring different algal symbionts. Geophysical Research Letters, Vol. 38, L19601. doi:10.1029/2011GL048501
  27. Fujita, K., Hikami, M., Suzuki, A., Kuroyanagi, A., Sakai, K., Kawahata, H., Nojiri, H. (2011) Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers. Biogeoscience, Vol. 8, pp. 2089-2098. doi:10.5194/bg-8-2089-2011
  28. Kuroyanagi, A., Kawahata, H., Suzuki, A., Fujita, K., Irie, T. (2009) Impacts of ocean acidification on large benthic foraminifers: Results from laboratory experiments. Marine Micropaleontology, Vol. 73, pp. 190-195. doi: 10.1016/j.marmicro.2009.09.003
  29. Dueñas-Bohórquez, A., da Rocha, R.E., Kuroyanagi, A., Bijma, J., Reichart, G.J. (2009) Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera. Marine Micropaleontology, Vol. 73, pp. 178-189. doi: 10.1016/j.marmicro.2009.09.002
  30. Kawahata, H., Minoshima, K., Ishizaki, Y., Yamaoka, K., Gupta L.P., Nagao, M., Kuroyanagi, A. (2009) Comparison of settling particles and sediments at IMAGES coring site in the northwestern North Pacific - Effect of resuspended particles on paleorecords. Sedimentary Geology, Vol. 222, pp. 254-262. doi: 10.1016/ j.sedgeo.2009.09.012
  31. Kuroyanagi, A., Tsuchiya, M., Kawahata, H., Kitazato, H. (2008) Paleo-environmental implications of two genotypes of the planktonic foraminifer Globigerinoides ruber (white). Marine Micropaleontology, Vol. 68, pp. 236-243. doi: 10.1016/j.marmicro.2008.04.004
  32. Kuroyanagi, A., Kawahata, H., Nishi, H., Honda, M.C. (2008) Seasonal to interannual changes in planktonic foraminiferal assemblages in the northwestern North Pacific: sediment trap results encompassing a warm period related to El Ni?o. Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 262, pp. 115-135. doi: 10.1016/j.palaeo.2008.02.012
  33. Kuroyanagi, A., Kawahata, H., Narita, H., Ohkushi, K., Aramaki, T. (2006) Reconstruction of paleoenvironmental changes based on the planktonic foraminiferal assemblages off Shimokita (Japan) in the northwestern Pacific. Global Planetary Change, Vol. 53, pp. 92-107. doi: 10.1016/j.gloplacha.2006.01.015
  34. Kuroyanagi, A., Kawahata, H. (2004) Vertical distribution of living planktonic foraminifera in the seas around Japan. Marine Micropaleontology, Vol. 53, pp. 173-196. doi:10.1016/j.marmicro.2004.06.001
  35. Kuroyanagi, A., Kawahata, H., Nishi, H., Honda, M.C. (2002) Seasonal changes in planktonic foraminifera in the northwestern North Pacific Ocean: sediment trap experiments from subarctic and subtropical gyres. Deep-Sea Research II, Vol. 49, pp. 5627-5645.

AWARD

AWARD
  1. PALEO10: Paleosciences Society “地球環境史学会貢献賞” (23 October 2021)
  2. Japan Geoscience Union (JpGU) The 4th Nishida Prize (1 June 2021)
  3. Palaeontological Society of Japan (PSJ) PSJ Academic Award (1 July 2022)