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Poor acclimation capacities in Antarctic marine ectotherms

机译:南极海洋等温线的适应能力差

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摘要

Animals can respond to temperature change by the following means: using physiological flexibility (including acclimation); or adapting; or migrating, with acclimation proposed as the major mechanism dictating prospects for survival in marine groups. In this study, 6 species of Antarctic invertebrate covering 4 phyla, Echinodermata, Mollusca, Brachiopoda and Crustacea were subjected to acclimation trials at 3 ℃ for 60 days. Using acute upper lethal temperatures as a metric of ability to acclimate, only one species (Marseniopsis mollis) increased its acute upper limit. Furthermore, analysis of oxygen consumption on the urchin Sterechinus neumayeri and the amphipod Paraceradocus gibber showed their metabolic rates were also not compensated over the 60-day exposure period. Thus, 5 out of 6 species failed to acclimate to temperatures only 3.5℃ above the annual average and 1-2℃ above current summer maximum values. We discuss the proposal that the abilities of Antarctic marine species to adjust to elevated environmental temperatures are as limited, if not more so, than tropical species.
机译:动物可以通过以下方式对温度变化做出反应:利用生理柔韧性(包括适应性);或适应;或迁移,建议采用驯化作为决定海洋群体生存前景的主要机制。在这项研究中,对覆盖4个门,棘皮动物,软体动物,腕足动物和甲壳纲的6种南极无脊椎动物进行了60天的3天驯化试验。使用急性致死上限温度作为适应能力的度量标准,只有一种物种(软体动物(Marseniopsis mollis))增加了其急性上限。此外,对海胆中型神经节虫和双足纲拟蟹拟南芥的耗氧量的分析表明,在60天的暴露期内,它们的代谢率也没有得到补偿。因此,每6个物种中就有5个未能适应温度,仅比年平均温度高3.5℃,比目前的夏季最高温度高1-2℃。我们讨论了这样一个建议,即南极海洋物种适应升高的环境温度的能力比热带物种受到的限制是有限的,如果不是更大的话。

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  • 来源
    《Marine biology》 |2010年第9期|P.2051-2059|共9页
  • 作者单位

    British Antarctic Survey, Natural Environment ResearchCouncil, High Cross, Madingley Rd, Cambridge CB3 0ET, UK;

    rnBritish Antarctic Survey, Natural Environment ResearchCouncil, High Cross, Madingley Rd, Cambridge CB3 0ET, UK;

    rnBritish Antarctic Survey, Natural Environment ResearchCouncil, High Cross, Madingley Rd, Cambridge CB3 0ET, UK;

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