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Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica

机译：南极莱德湾地表水中的硅藻组合物的季节性变化

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摘要

Phytoplankton assemblages from seasonally sea-ice covered Ryder Bay (Adelaide Island, Antarctica) were studied over three austral summers (2004-2007), to link sea-ice variability and environmental conditions with algal speciation. Typical of near-shore Antarctic waters, biomass was dominated by large diatoms, although the prymnesiophyte Phaeocystis antarctica was numerically dominant. Although there was considerable interannual variability between main diatom species, high biomass of certain species or species groups corresponded consistently to certain phases of seasonal progression. We present the first documentation of an extensive bloom of the late-season diatom Proboscia inermis in February 2006, accounting for over 90% of diatom biomass. At this time, water column stratification and nutrient drawdown were high relative to other periods of the study, although carbon export was relatively low. Melt water flux in this region promotes well-stratified surface waters and high chlorophyll levels, but not necessarily concurrent increases in export production relative to seasons with lower freshwater inputs.
机译：在三个南方夏季（2004-2007年）研究了季节性海冰覆盖的莱德湾（南极阿德莱德岛）的浮游植物组合，以将海冰的可变性和环境条件与藻类形成联系起来。典型的近岸南极水域中，生物量主要由大型硅藻主导，尽管南极洲旱生植物藻囊藻在数量上占主导地位。尽管主要硅藻物种之间存在较大的年际变化，但某些物种或物种组的高生物量始终与季节发展的某些阶段相对应。我们在2006年2月提交了第一份有关季末硅藻Proboscia inermis大量繁殖的文献，占硅藻生物量的90％以上。目前，尽管碳出口量相对较低，但与其他研究阶段相比，水柱分层和养分吸收量较高。该地区的融水通量促进了地表水的分层和高叶绿素水平，但与淡水输入较低的季节相比，出口产量不一定同时增加。

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  • 来源
    《Polar biology》 |2010年第1期|13-29|共17页
  • 作者

    Amber L. Annett; Damien S. Carson; Xavier Crosta; Andrew Clarke; Raja S. Ganeshram;

  • 作者单位

    Grant Institute, School of GeoSciences, University of Edinburgh The King's Buildings, West Mains Road, Edinburgh EH9 3JW, UK;

    Grant Institute, School of GeoSciences, University of Edinburgh The King's Buildings, West Mains Road, Edinburgh EH9 3JW, UK;

    UMR-CNRS 5805 EPOC, Universite Bordeaux 1, Av. Des Facultes, 33405 Talence Cedex, France;

    British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 OET, UK;

    Grant Institute, School of GeoSciences, University of Edinburgh The King's Buildings, West Mains Road, Edinburgh EH9 3JW, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    diatoms; phytoplankton; seasonality; sea-ice; coastal Antarctic; proboscia inermis;

    机译：硅藻浮游植物季节性海冰;南极沿海地区;无名氏;

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