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首页> 外文期刊>Polar biology >Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992 and 2007, 2008
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Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992 and 2007, 2008

机译：1991、1992和2007、2008年夏季楚科奇海中层浮游动物群落的逐年变化

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摘要

A recent drastic decrease in sea ice cover area was observed in the western Arctic Ocean during summer, yet little information is available for its effect on zoo-plankton community. To evaluate the effect of sea ice reduction on zooplankton, we studied year-to-year changes of zooplankton community structure in the Chukchi Sea during summers of 1991, 1992 (when sea ice extended), 2007, and 2008 (when sea ice reduced). Zooplankton abundance ranged from 4,000 to 316,000 ind. m~(-2) (mean: 70,000) and was greater north of Lisburne Peninsula in 2008. Zooplankton biomass ranged from 0.07 to 286 g wet mass m~(-2) (mean: 36) and was greater south of Lisburne Peninsula in 2007. Cluster analysis based on zooplankton abundance showed a division of the zooplankton community into four groups. Occurrence of each group was separated geographically and interannually, and geographic distributions of each group in 1991 and 1992 were similar but those in 2007 and 2008 were shifted northward. Abundance and biomass in 2007/2008 were higher than in 1991/1992, indicating that further sea ice reduction would have a positive effect on zooplankton production (e.g. invasion of large Pacific species and temperature effects on their growth rate). The northern shift in geographic distribution of the zooplankton community in 2007/2008 indicates that sea ice reduction would have a negative effect on the zooplankton community (loss of characteristic Arctic species) in part of the Chukchi Sea. These apparently contradictory effects of sea ice reduction on zooplankton community emphasize the critical need for continued monitoring in this area.
机译：夏季期间，北冰洋西部最近观测到海冰覆盖面积最近急剧减少，但鲜有关于其对浮游动物群落影响的信息。为了评估海冰减少对浮游动物的影响，我们研究了楚科奇海1991年，1992年（海冰扩展时），2007年和2008年夏季（海冰减少时）夏季浮游动物群落结构的逐年变化。 。浮游动物的丰度范围为4,000至316,000 ind。 m〜（-2）（平均数：70,000），在2008年位于利斯本半岛以北。浮游生物的生物量范围为0.07至286 g湿重m〜（-2）（平均数：36），在更大的利斯本半岛以南。 2007年。基于浮游动物丰度的聚类分析显示，浮游动物群落分为四个组。各组的发生在地理上和年度间是分开的，1991年和1992年各组的地理分布相似，但2007年和2008年的地理分布向北移动。 2007/2008年的丰度和生物量高于1991/1992年，这表明进一步减少海冰将对浮游动物的生产产生积极影响（例如，大型太平洋物种的入侵和温度对其生长速率的影响）。 2007/2008年浮游动物群落地理分布的北移表明，在楚科奇海部分地区，海冰减少将对浮游动物群落产生负面影响（北极特有物种的损失）。减少海冰对浮游动物群落的这些明显矛盾的作用强调了在这一地区继续监测的迫切需要。

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  • 来源
    《Polar biology》 |2011年第9期|p.1349-1360|共12页
  • 作者

    Kohei Matsuno; Atsushi Yamaguchi; Toru Hirawake; Ichiro Imai;

  • 作者单位

    Laboratory of Marine Biology, Graduate School of Fisheries Science, Hokkaido University, 3-1-1 Minatomachi, Hakodate, Hokkaido 041-8611, Japan;

    Laboratory of Marine Biology, Graduate School of Fisheries Science, Hokkaido University, 3-1-1 Minatomachi, Hakodate, Hokkaido 041-8611, Japan;

    Laboratory of Marine Bioresource and Environment Sensing, Graduate School of Fisheries Science, Hokkaido University, 3-1-1 Minatomachi, Hakodate, Hokkaido 041-8611, Japan;

    Laboratory of Marine Biology, Graduate School of Fisheries Science, Hokkaido University, 3-1-1 Minatomachi, Hakodate, Hokkaido 041-8611, Japan;

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  • 正文语种 eng
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  • 关键词

    barnacle larvae; chukchi sea; copepods; interannual variability; zooplankton community;

    机译：藤壶幼虫楚科奇海pe足类年际变化;浮游动物群落;

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