Diatom floral fluxes at Stations AB and SA in the Bering Sea and the northern Subarctic Pacific, 1990-1998

• Onodera Jonaotaro

  Center for Advanced Marine Core Research, Kochi University

• Takahashi Kozo

  Department of Earth and Planetary Sciences, Kyushu University

• Onishi Hiroji

  Graduate School of Fisheries Science, Hokkaido University

• Yanada Mitsuru

  Graduate School of Fisheries Science, Hokkaido University

Bibliographic Information

Other Title

• ベーリング海Station AB及び北太平洋Station SAにおける珪藻沈降群集フラックス1990-1998
• ベーリングカイ Station AB オヨビ キタタイヘイヨウ Station SA ニ オケル ケイソウ チンコウ グンシュウ フラックス 1990 1998

Abstract

In order to decipher the relationship between the changes in diatom floral fluxes and the oceanographic condition, we've deployed sediment traps at Stations AB (the Aleutian Basin) and SA (the central subarctic Pacific) from August of 1990 to the present. For the first eight years, we've conducted a diatom flux study. Total diatom fluxes (TDF) at both stations usually showed spring and/or fall peaks in a year. However, significant interannual variations of TDF were observed at both stations. At Station SA, significant correlation coefficient was obtained between mean TDF of each year and Pacific Decadal Oscillation index. These interannual variations are possibly due to the differences in the strength and timing of winter mixing and the subsequent summer stratification. The dominant species at both stations was Neodenticula seminae with mean abundances of 80% (Station AB) and 82% (Station SA) of TDF throughout the sampled duration. Coastal species were more abundant at Station AB than Station SA. At Station SA, relatively small numbers of Chaetoceros resting spores occurred in summers of some years as the result of lateral advection from the Aleutian Islands. During the eight years, the slight changes of diatom sinking flora were observed at both stations. Whether or not these trends suggest the changes in oceanographic condition for long-term, a further observation is warranted and to be continued.

Journal

• Oceanography in Japan

  Oceanography in Japan 18 (5), 307-322, 2009-09-05

  The Oceanographic Society of Japan

Keywords

• Diatom floral flux
• Sediment trap
• Northern central subarctic Pacific
• Bering Sea

Details

• CRID: 1390858518831360896
• NII Article ID: 110007360446
• NII Book ID: AN10382760
• DOI: 10.5928/kaiyou.18.5_307
• ISSN: 21863105
• ISSN: 09168362
• NDL BIB ID: 10427605
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10427605
• Web Site: https://www.jstage.jst.go.jp/article/kaiyou/18/5/18_307/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed