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首页> 外文期刊>Polar biology >Time-series analysis of hydrological and biological variability on the Prince Edward Island (Southern Ocean) shelf
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Time-series analysis of hydrological and biological variability on the Prince Edward Island (Southern Ocean) shelf

机译：爱德华王子岛（南洋）陆架水文和生物变异性的时间序列分析

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摘要

Eulerian time-series were completed at three sites on the south eastern shelf of the Sub-Antarctic Prince Edward Islands (PEI), from 9 to 27 April 2000, to investigate the spatial and temporal variability of mesozooplankton communities in relation to on-shelf hydrodynamics. Surface temperature and phytoplankton biomass were recorded daily at all three sites, while two Bongo net tows and vertical temperature profiles were collected daily at two sites. Con trary to predictions of on-shelf water retention at low ambient current velocities, cross-correlation analysis identified a northward advection of ～8.23 cm s~(-1) over the study area. Day to day changes in both physical and biological parameters were associated with cross-shelf advection. However, sea temperature had a narrow range of 6.2-7.4℃, while average between sample Bray-Curtis similarity in zooplankton communities was high, exceeding 75%. The relatively consistent average sample biomass amounted to ～ 494 tonnes dry weight of mesozooplankton per day being advected onto the south eastern sector of the PEI shelf. We hypothesise that the observed stability of both physical and biological parameters was due to the Sub-Antarctic Front, with its high volume transport and steep physical gradients, being far to the north of the islands. Spatial and temporal variability of hydrodynamics on the PEI shelf, and particularly its relationship to shifting frontal positions, is highlighted as a future research area necessary rnto quantify the gross delivery of allochthonous biomass to the PEI ecosystem.
机译：2000年4月9日至27日，在南极爱德华王子岛（PEI）东南大陆架上的三个地点完成了欧拉时间序列，以研究中游浮游动物群落与架上流体动力学的时空变化。 。每天在所有三个地点记录表面温度和浮游植物生物量，而每天在两个地点收集两个邦戈网拖曳和垂直温度分布图。与在低环境电流速度下的货架上保水量的预测相反，互相关分析确定了研究区域的北向平流约为8.23 cm s〜（-1）。物理和生物学参数的每日变化与跨架平流有关。然而，海洋温度在6.2-7.4℃的狭窄范围内，而浮游动物群落中样本Bray-Curtis相似度的平均值很高，超过了75％。相对稳定的平均样本生物量每天被驱逐到PEI架子的东南部，约达494吨中型浮游动物的干重。我们假设观察到的物理和生物学参数的稳定性归因于南极前锋，该南极前锋具有高体积输运和陡峭的物理梯度，并且远离岛屿的北部。 PEI架子上水动力的时空变化，尤其是其与变化的额叶位置的关系，被突出为一个未来的研究领域，是量化异源生物量向PEI生态系统总输送量所必需的。

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  • 来源
    《Polar biology》 |2008年第8期|893-904|共12页
  • 作者

    Brian P. V. Hunt; Leigh J. Gurney; Evgeny A. Pakhomov;

  • 作者单位

    Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, V6T 1Z4 Vancouver, BC, Canada;

    Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, V6T 1Z4 Vancouver, BC, Canada;

    Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, V6T 1Z4 Vancouver, BC, Canada Zoology Department, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa;

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  • 正文语种 eng
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  • 关键词

    time-series; eulerian study; prince edward islands; sub-antarctic; mesozooplankton;

    机译：时间序列;欧拉研究爱德华王子岛亚南极中层浮游生物;

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