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首页> 外文期刊>ICES Journal of Marine Science >Climate impacts on eastern Bering Sea foodwebs: a synthesis of new data and an assessment of the Oscillating Control Hypothesis
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Climate impacts on eastern Bering Sea foodwebs: a synthesis of new data and an assessment of the Oscillating Control Hypothesis

机译:气候对白令海东部食物网的影响:新数据的综合以及对振荡控制假说的评估

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摘要

Walleye pollock (Theragra chalcogramma) is an important component of the eastern Bering Sea ecosystem and subject to major fisheries. The Oscillating Control Hypothesis (OCH) predicted that recruitment of pollock year classes should be greatest in years with early ice retreat and late blooms in warm water, because more energy would flow into the pelagic (vs. benthic) community. The OCH further predicted that, with pollock population growth, there should be a shift from bottom-up to top-down regulation. New data support the predictions that in those years with early ice retreat, more primary production accrues to the pelagic compartment and that large numbers of age-0 pollock survive to summer. However, in these years, production of large crustacean zooplankton is reduced, depriving age-0 pollock of lipid-rich prey in summer and autumn. Consequently, age-0 pollock energy reserves (depot lipids) are low and predation on them is increased as fish switch to age-0 pollock from zooplankton. The result is weak recruitment of age-1 recruits the following year. A revised OCH indicates bottom-up constraints on pollock recruitment in very warm periods. Prolonged warm periods with decreased ice cover will likely cause diminished pollock recruitment and catches relative to recent values.
机译:角膜白斑鳕(Theragra chalcogramma)是白令海东部生态系统的重要组成部分,受主要渔业影响。振荡控制假说(OCH)预测,在早期退冰和晚开水的情况下,鳕鱼年级的招募应该是最大的,因为更多的能量会流入中上层(相对于底栖)社区。 OCH进一步预测,随着鳕鱼种群的增长,应该由下而上转向由上而下的监管。新的数据支持这样的预测,即在那些早期退冰的年代,中上层舱室产生了更多的初级产量,并且大量0岁的狭鳕存活到了夏季。但是,这些年来,大型甲壳类浮游动物的生产减少了,夏季和秋季剥夺了0岁零食鳕鱼富含脂质的猎物。因此,随着鱼类从浮游动物转到0岁小鳕的生长,0岁小鳕的能量储备(贮库中的脂质)很低,捕食能力也随之增加。结果是第二年招募1岁以下的新兵。修订后的OCH表明,在非常温暖的时期,自下而上限制了对鳕的招聘。相对于最近的数值,长时间的温暖期和减少的冰盖可能会导致狭鳕的吸食和捕捞减少。

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  • 来源
    《ICES Journal of Marine Science》 |2011年第6期|p.1230-1243|共14页
  • 作者单位

    School of Aquatic and Fishery Sciences, University of Washington, PO Box 355020, Seattle, WA 98195, USA;

    lnstitute of Marine Science, University of Alaska, Fairbanks, AK 99775-7220, USA;

    NOAA-National Marine Fisheries Service, Alaska Fisheries Science Center, Auke Bay Laboratories, 17109 Pt. Lena Loop Rd.Juneau, AK 99801, USA;

    NOAA-National Marine Fisheries Service, Alaska Fisheries Science Center, Auke Bay Laboratories, 17109 Pt. Lena Loop Rd.Juneau, AK 99801, USA;

    NOAA-National Marine Fisheries Service, Alaska Fisheries Science Center, Auke Bay Laboratories, 17109 Pt. Lena Loop Rd.Juneau, AK 99801, USA;

    ]uneau Center, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, 11120 Glacier Highway, Juneau, AK 99801, USA;

    NOAA-National Marine Fisheries Service, Alaska Fisheries Science Center, 7600 Sand Point Way NE, Seattle, WA 98175, USA;

    NOAA/OAR Pacific Marine Environmental Laboratory, 7600 Sand Point Way, NE, Seattle, WA 9811S-6249, USA;

    NOAA-National Marine Fisheries Service, Alaska Fisheries Science Center, 7600 Sand Point Way NE, Seattle, WA 98175, USA;

    NOAA/OAR Pacific Marine Environmental Laboratory, 7600 Sand Point Way, NE, Seattle, WA 9811S-6249, USA;

    NOAA/OAR Pacific Marine Environmental Laboratory, 7600 Sand Point Way, NE, Seattle, WA 9811S-6249, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bering sea; climate change; crustacean zooplankton; oscillating control hypothesis; sea ice cover; theragra chalcogramma; walleye pollock; year-class strength;

    机译:白令海;气候变化;甲壳类浮游动物;振荡控制假设;海冰盖茶蜡质角膜白斑鳕年级实力;

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