1991/1992年夏季の南極昭和基地周辺の定着氷下における植物プランクトン細胞フラックス(英文) Phytoplankton cell flux under fast ice near Syowa Station, Antarctica, in austral summer 1991/1992

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Author(s)

    • 小達 恒夫 Odate Tsuneo
    • 情報・システム研究機構国立極地研究所 National Institute of Polar Research, Research Organization of Information and Systems
    • 福地 光男 Fukuchi Mitsuo
    • 情報・システム研究機構国立極地研究所 National Institute of Polar Research, Research Organization of Information and Systems

Abstract

1992年1月7日から2月6日の期間,南極昭和基地周辺の定着氷下にセジメントトラップを設置し,沈降粒子を採集した.得られた試料を基に顕微鏡観察を行い,植物プランクトン細胞数のフラックス(PN)及び細胞体積から換算した植物プランクトン炭素フラックス(PC)を見積もった.PNフラックスは,1月上旬に低く,1月末から2月初めに最も高く,その時間変動は過去の報告と一致した.しかしながら,その値は過去の報告値に比べ数倍低く,上層の植物プランクトン現存量の年変動に起因するものと考えられた.PCフラックスも,PNフラックスと同じような時間変動を示した.以前に報告したクロロフィルフラックスの値とPCフラックスを比較すると,PC : クロロフィル比は,文献値に比べやや低い約17と見積もられた.

Settling particles were collected using sediment traps, which were deployed beneath fast ice near Syowa Station, Antarctica, from January 7 to February 6 1992. Fluxes of phytoplankton cell number (PN) and carbon (PC) were estimated based on microscopic observation and determination of cell volume. During the present study period, PN flux was low in the early half of January and reached a maximum at the end of January or the beginning of February. Although patterns of temporal change of PN flux were consistent with a previous study, the values were several times lower in the present study than in the previous report. Interannual variation of phytoplankton biomass in the surface layer seems to result in differences in phytoplankton flux. The temporal variation of PC flux was similar to that of the PN flux. Comparing PC flux and chlorophyll a (Chl a) flux, which was reported in a previous study, a PC : Chl a ratio of about 17 was estimated. This value is slightly lower than literature PC : Chl a ratios.

Journal

  • Antarctic record

    Antarctic record 48(2), 110-116, 2004-07-01

    National Institute of Polar Research

Keywords

Codes

  • NII Article ID (NAID)
    40006463957
  • NII NACSIS-CAT ID (NCID)
    AN00181831
  • Text Lang
    ENG
  • ISSN
    00857289
  • NDL Article ID
    7123022
  • NDL Source Classification
    ZM1(科学技術--科学技術一般)
  • NDL Call No.
    Z14-316
  • Data Source
    NDL  NII-ELS 
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