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首页> 外文期刊>Polar biology >Inter-annual variation of the summer zooplankton community in the Chukchi Sea: spatial heterogeneity during a decade of rapid ice decline
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Inter-annual variation of the summer zooplankton community in the Chukchi Sea: spatial heterogeneity during a decade of rapid ice decline

机译：楚科奇海夏季浮游动物群落的年际变化：十年来冰急速下降的空间异质性

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摘要

Ice decline is believed to benefit the pelagic food chain in Arctic shelf ecosystems, but the impacts of ice decline are usually difficult to detect owing to the overlap of ice decline with natural variability. To evaluate the responses of zooplankton communities to sea ice reduction in the Chukchi Sea, we combined zooplankton samples collected in the early summers of 2003, 2008, 2010, and 2012 and compared the inter-annual changes in the subregions with various physical and biological characteristics. Three geographically separate communities were identified by a hierarchical cluster analysis. The Bering Sea water influenced the central (CCS) and south (SCS) Chukchi Sea communities, which had total abundances that were approximately ten times higher than that of the north (NCS) Chukchi Sea community, and the inter-annual variability was dramatic. The SCS and CCS shared dominant taxa of Calanus glacialis , Pseudocalanus spp., barnacle larvae (nauplii and cypris), and Oikopleura vanhoffeni , while Pacific and neritic species were recognized as the dominant species in only the SCS. The inter-annual variations in the dominant species assemblages can be explained by the variability in oceanic circulation and the counteractions between copepods and barnacle larvae. Despite the numerical fluctuations, an increase in the average abundances in the Pacific-influenced region and the summer establishment of the C. glacialis population are proposed to be the most pronounced responses to ice decline. The NCS, which is governed by cold Arctic water, was characterized by low abundances and a constant dominant taxa assemblage. This area was also characterized by the presence of the high Arctic species Calanus hyperboreus and a lack of barnacle larvae. The total abundance of the NCS doubled from 2003 to 2008, while the community structure remained consistent. These results indicate that sea ice reduction has a positive effect on the zooplankton community, but heterogeneity is the main obstacle to the detection of the zooplankton community in the Western Arctic Ocean.
机译：人们认为，冰的减少有益于北极大陆架生态系统的中上层食物链，但由于冰的减少与自然变异性重叠，通常难以发现其减少的影响。为了评估楚科奇海浮游动物群落对减少海冰的响应，我们结合了2003、2008、2010和2012初夏采集的浮游动物样本，并比较了具有不同物理和生物学特征的该次区域的年际变化。 。通过层次聚类分析确定了三个地理上分离的社区。白令海水影响了中部（CCS）和南部（SCS）的楚科奇海群落，其总丰度约为北部（NCS）楚科奇海群落的十倍，而且年际变化很大。 SCS和CCS共享了Calanus glacialis，Pseudocalanus spp。，藤壶幼虫（无节幼体和塞浦路斯）和Oikopleura vanhoffeni的优势种，而只有太平洋和轻度物种被认为是SCS的优势种。优势种组合的年际变化可以通过海洋环流的变化以及co足类和藤壶幼虫之间的相互作用来解释。尽管存在数值波动，但太平洋受灾地区的平均丰度增加和夏季C. glacialis种群的增加被认为是对冰量下降最明显的反应。由寒冷的北极水控制的NCS的特征是低丰度和恒定的优势类群组合。该地区的特征还在于高北极物种Calanus hyperboreus的存在和藤壶幼虫的缺乏。从2003年到2008年，NCS的总丰度翻了一番，而社区结构保持一致。这些结果表明，减少海冰对浮游动物群落具有积极作用，但异质性是在北冰洋西部发现浮游动物群落的主要障碍。

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  • 来源
    《Polar biology》 |2018年第9期|1827-1843|共17页
  • 作者

    Zhiqiang Xu; Guangtao Zhang; Song Sun;

  • 作者单位

    Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences;

    Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences,University of Chinese Academy of Sciences,Laboratory for Marine Ecology and Environmental Sciences, Qingdao National Laboratory for Marine Science and Technology;

    Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences,University of Chinese Academy of Sciences,Laboratory for Marine Ecology and Environmental Sciences, Qingdao National Laboratory for Marine Science and Technology,Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;

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  • 正文语种 eng
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  • 关键词

    Zooplankton community; Composition; Geographical distribution; Species invasion; Dominance index;

    机译：浮游动物群落;组成;地理分布;物种入侵;优势指数;

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