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Ecological niche of coastal Beaufort Sea fishes defined by stable isotopes and fatty acids

机译：稳定的同位素和脂肪酸定义了博福特沿海鱼类的生态位

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摘要

Little is known about the trophic ecology of freshwater, coastal and marine fish species that utilize coastal environments in the Beaufort Sea. In this study we use stable isotopes (SI) and fatty acid (FA) profiles to (1) characterize habitat and diet components of the ecological niche for 16 co-occurring fish species, (2) quantify niche overlap among these species and groups of species, and (3) identify resource partitioning and niche shift indicators for future monitoring. Ward's cluster analysis of SI (delta C-13, delta N-15) results identified 3 representative isotopic groups that were consistent with known life-history groups: marine, freshwater-rearing and coastal fishes. Correspondence and Ward's clustering analyses on FA profiles resulted in 5 FA groups that indicated feeding preferences and included: pelagic marine-feeding, benthic and pelagic brackish (both fresh water and marine)-feeding, benthic freshwater-feeding, benthic marine-feeding, and benthic brackish-feeding groups. Isotopic niche size and feeding preferences (FA) indicated generalist and specialist strategies that could be used as indicators for resource partitioning and niche shifts. Understanding the habitat use, diet, and trophic interactions among fish species is important in monitoring the Tarium Niryutait Marine Protected Area. Combining SI and FA tracers to quantify probability of niche overlap is a unique aspect of understanding species-specific niche interactions within the Beaufort Sea coastal environment, and our results contribute to understanding how these biotracers can contribute to current and future monitoring and management of this remote MPA.
机译：对于利用波弗特海沿岸环境的淡水，沿海和海洋鱼类的营养生态知之甚少。在这项研究中，我们使用稳定的同位素（SI）和脂肪酸（FA）分布图（1）表征16种同时出现的鱼类的生态位栖息地和饮食成分，（2）量化这些物种和种群之间生态位的重叠（3）确定资源分配和生态位转移指标，以供将来监测。 Ward对SI（δC-13，δN-15）结果的聚类分析确定了3个具有代表性的同位素组，它们与已知的生活史组一致：海洋，淡水养育和沿海鱼类。对应关系和Ward对FA剖面的聚类分析得出了5个FA组，这些FA组表明了饲喂偏好，包括：上层海洋饲养，底栖和中上微咸（淡水和海洋）-饲养，底栖淡水饲养，底栖海洋饲养和底栖微咸喂养群体。同位素生态位的大小和摄食偏好（FA）表明，通才和专业策略可以用作资源分配和生态位转移的指标。了解鱼类物种之间的栖息地使用，饮食和营养相互作用对于监控Tarium Niryutait海洋保护区非常重要。结合SI和FA示踪剂以量化生态位重叠的可能性是了解博福特海沿岸环境内特定物种的生态位相互作用的一个独特方面，我们的结果有助于理解这些生物示踪剂如何有助于当前和未来对该偏远地区的监测和管理MPA。

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  • 来源
    《Marine ecology progress series》 |2016年第9期|159-173|共15页
  • 作者

    Brewster Jasmine D.; Giraldo Carolina; Swanson Heidi; Walkusz Wojciech; Loewen Tracey N.; Reist Jim D.; Stern Gary A.; Loseto Lisa L.;

  • 作者单位

    Univ Manitoba, Dept Environm & Geog, 220 Sinnott Bldg,70A Dysart Rd, Winnipeg, MB R3T 2N2, Canada|Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada;

    Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada;

    Univ Waterloo, Dept Biol, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

    Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada|Polish Acad Sci, Inst Oceanol, Powstancow Warszawy 55, PL-81712 Sopot, Poland;

    Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada|Univ Manitoba, Dept Geol Sci, 240 Wallace Bldg,125 Dysart Rd, Winnipeg, MB R3T 2N2, Canada;

    Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada;

    Univ Manitoba, Dept Environm & Geog, 220 Sinnott Bldg,70A Dysart Rd, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Environm & Geog, 220 Sinnott Bldg,70A Dysart Rd, Winnipeg, MB R3T 2N2, Canada|Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Cres, Winnipeg, MB R3T 2N6, Canada;

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  • 正文语种 eng
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  • 关键词

    Niche; Stable isotopes; Fatty acids; Marine protected areas; Fishes;

    机译：生态位;稳定同位素;脂肪酸;海洋保护区;鱼类;

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