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首页> 外文期刊>ICES Journal of Marine Science >Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada
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Daytime depth and thermal habitat of two sympatric krill species in response to surface salinity variability in the Gulf of St Lawrence, eastern Canada

机译：加拿大东部圣劳伦斯湾的两种同养磷虾种类的白天深度和热生境，对地表盐度变化的响应

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摘要

We describe the response of acoustically determined weighted mean depth (WMD) of two sympatric species of krill, Thysanoessa raschii and Meganyctiphanes norvegka, to variations in surface salinity during summer in the Gulf of St Lawrence. In this coastal system, non-living particulates and CDOM carried by the freshwater run-off of the St Lawrence River and several large rivers have a strong impact on turbidity and light attenuance in the surface layer. The WMD of T. raschii and M. norvegka were significantly and positively related to surface salinity. However, A/I. norvegka was found deeper and in warmer water than T. raschii, and the latter had a steeper response to. surface salinity. The species-specific relationships between daytime WMD and surface salinity enabled us to estimate both species regional and interannual variations in summertime temperature habitat during a 21-year period (1991-2011). The variability in daytime WMD resulted in significant inter- and intraspecific differences in the temperature experienced by adult krill that may impact development, growth, and reproduction. Our study illustrated the importance of considering species-specific responses to environmental forcing in coupled biophysical models that aim to explore the impacts of environmental variations on krill dynamics.
机译：我们描述了在夏季，圣劳伦斯湾的两个磷虾同养磷虾（Thysanoessa raschii和Meganyctiphanes norvegka）在声学上确定的加权平均深度（WMD）对表面盐度变化的响应。在这个沿海系统中，圣劳伦斯河和几条大河的淡水径流携带的非生物微粒和CDOM对表层的浊度和光衰减有很大影响。 T. raschii和M. norvegka的WMD与表面盐度显着正相关。但是，A / I。发现诺韦格卡比罗氏锥虫更深，温度更高，而后者对罗氏藻的反应更陡。表面盐度。白天大规模杀伤性武器与地表盐度之间的特定物种关系使我们能够估计21年期间（1991-2011年）夏季温度栖息地的物种区域和年际变化。白天大规模杀伤性武器的可变性导致成年磷虾经历的种间和种内温度差异很大，这可能会影响发育，生长和繁殖。我们的研究表明了在耦合生物物理模型中考虑物种对环境强迫的特定反应的重要性，该模型旨在探索环境变化对磷虾动力学的影响。

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  • 来源
    《ICES Journal of Marine Science》 |2014年第2期|272-281|共10页
  • 作者

    Stephane Plourde; Ian H. McQuinn; Frederic Maps; Jean-Francois St-Pierre; Diane Lavoie; Pierre Joly;

  • 作者单位

    Institut Maurice-Lamontagne, Fisheries and Oceans Canada, 850 route de la Mer C.P. 1000, Mont-Joli (Qc), Canada G5H 3Z4;

    Institut Maurice-Lamontagne, Fisheries and Oceans Canada, 850 route de la Mer C.P. 1000, Mont-Joli (Qc), Canada G5H 3Z4;

    Departement de Biologie, Universite Laval Quebec (Qc), Canada C1V 0A6;

    Institut Maurice-Lamontagne, Fisheries and Oceans Canada, 850 route de la Mer C.P. 1000, Mont-Joli (Qc), Canada G5H 3Z4;

    Institut Maurice-Lamontagne, Fisheries and Oceans Canada, 850 route de la Mer C.P. 1000, Mont-Joli (Qc), Canada G5H 3Z4;

    Institut Maurice-Lamontagne, Fisheries and Oceans Canada, 850 route de la Mer C.P. 1000, Mont-Joli (Qc), Canada G5H 3Z4;

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  • 正文语种 eng
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  • 关键词

    Gulf of St Lawrence; krill; Meganyctiphanes norvegka; Thysanoessa raschii; vertical distribution;

    机译：圣劳伦斯湾;磷虾Meganyctiphanes norvegka;Thysanoessa raschii;垂直分布;

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