カナダ北極圏ボフォート海におけるマリンスノーフラックスおよび内部の微小生物相の変化  [in Japanese] Preliminary report on variability of marine snow f1ux and their microorganisms collected with sediment traps in the Beaufort Sea, Canadian Arctic Ocean  [in Japanese]

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Author(s)

    • 真壁 竜介 Makabe Ryusuke
    • 石巻専修大学理工学部生物生産工学科 Department of Biological Engineering, Faculty of Science and Engineering, Ishinomaki Senshu University
    • 渋谷 文恵 Shibuya Fumie
    • 石巻専修大学理工学部生物生産工学科 Department of Biological Engineering, Faculty of Science and Engineering, Ishinomaki Senshu University
    • 太田 尚志 [他] Ota Takashi
    • 石巻専修大学理工学部生物生産工学科 Department of Biological Engineering, Faculty of Science and Engineering, Ishinomaki Senshu University
    • 三瓶 真 Sampei Makoto
    • ラーバル大学ケベック海洋研究部門 Quebec-Ocean Division, Universite Laval, Pavillon Vachon, Quebec Qc G1K7P4, Canada
    • 服部 寛 Hattori Hiroshi
    • 北海道東海大学工学部海洋開発工学科 Department of Marine Science and Technology, Hokkaido Tokai University
    • 佐々木 洋 Sasaki Hiroshi
    • 石巻専修大学理工学部生物生産工学科 Department of Biological Engineering, Faculty of Science and Engineering, Ishinomaki Senshu University

Abstract

Seasonal changes of sinking marine snow (>0.5mm in longest dimension) flux and their composition of microorganisms associated with marine snow collected using time-series sediment traps were observed at a station (CA7; 71°N, 134°W, 501m water depth) in the Mackenzie shelf slope of the Beaufort sea from 21 September 2002 to 31 August 2003. Downward fluxes of marine snow at 69m increased in the middle of May 2003 and reached the maximum (ca. 20000m^<-2>d^<-1>) in the end of June 2003. The epifluorescence microscopic study showed that marine snow are associated with many microorganisms, such as bacteria, nano- and microflagellates, diatoms and ciliates, and they frequently included small clay-like detritus. The abundance and compositions of microorganisms in these marine snow varied seasonally with elevated primary production in spring-summer and turbid water intrusion from the Mackenzie shelf area during an open water period. The maximum flux (ca. 20mgC m^<-2>d^<-1>) appeared at 199m in the beginning of July, was about 3 times less than that at 69m in late June. The difference in occurrence of maximum flux between two depths would be explained by combined processes of particle retention within the upper water column and horizontal transport of allochthonous particles from the shallow shelf waters.

Journal

  • Bulletin of Ishinomaki Senshu University

    Bulletin of Ishinomaki Senshu University (18), 49-59, 2007-01

    Ishinomaki Senshu University

Codes

  • NII Article ID (NAID)
    110006609669
  • NII NACSIS-CAT ID (NCID)
    AN10385281
  • Text Lang
    JPN
  • Journal Type
    大学紀要
  • ISSN
    09158715
  • NDL Article ID
    8720329
  • NDL Source Classification
    ZV1(一般学術誌--一般学術誌・大学紀要)
  • NDL Call No.
    Z22-B42
  • Data Source
    NDL  NII-ELS 
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