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首页> 外文期刊>Polar biology >Zooplankton feeding on algae and bacteria under ice in Lake Druzhby, East Antarctica
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Zooplankton feeding on algae and bacteria under ice in Lake Druzhby, East Antarctica

机译：南极东部德鲁日比湖浮游生物以藻类和细菌为食

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摘要

The feeding of the cladoceran Daphniopsis studeri on algae and bacteria was investigated under ice in an ultra-oligotrophic Antarctic lake from late autumn (May) to early spring (October) in 2004. D. studeri fed on both algae and bacteria with estimated filtering rates of 0.048 and 0.061 1 ind~(-1) day~(-1)), respectively. Algae seemed to be the major food resource for the D. studeri population, however at times of low algal densities the bacterioplankton represented an important alternative food resource. The D. studeri grazing impact on the algal and bacterial standing stock was in general low (0.6-4.6% removed per day), but during the winter period this organism can remove up to 34% of the bacterial production (BP). At times D. studeri grazing can temporarily have a significant impact on the BP rates, though their impact was relatively low when compared to viral-induced bacterial mortality in the lake.
机译：2004年秋季（五月）至初春（十月），在超寡营养的南极湖中，在冰下调查了锁骨Da螺对藻类和细菌的摄食。2004年，食藻对藻类和细菌进行摄食，估计过滤率分别为0.048和0.061 1 ind〜（-1）天〜（-1））。藻类似乎是D. studeri种群的主要食物资源，但是在藻类密度较低的时候，浮游细菌是重要的替代食物资源。梭状芽孢杆菌对藻类和细菌种群的放牧影响通常较低（每天清除0.6-4.6％），但是在冬季，这种生物最多可以清除细菌产量（BP）的34％。尽管与病毒引起的湖泊细菌死亡相比，草地杜鹃放牧有时会对BP率产生重大影响，但其影响相对较低。

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  • 来源
    《Polar biology》 |2009年第8期|1195-1202|共8页
  • 作者

    Christin Saewstroem; Jan Karlsson; Johanna Laybourn-Parry; Wilhelm Graneli;

  • 作者单位

    Climate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science, Umea University, 62, 981 07 Abisko, Sweden Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia;

    Climate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science, Umea University, 62, 981 07 Abisko, Sweden;

    The Institute for Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, TAS 7001, Australia;

    Department of Limnology, Lund University, Ecology Building, Lund 223 62, Sweden;

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  • 正文语种 eng
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  • 关键词

    antarctic lake; bacteria; algae; zooplankton; feeding rates;

    机译：南极湖菌;藻类浮游动物喂食率;

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