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首页> 外文期刊>Polar biology >Copepod feeding strategies in the epipelagic to bathypelagic zone of Prydz Bay, Antarctica: an assessment through fatty acids and stable isotopes
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Copepod feeding strategies in the epipelagic to bathypelagic zone of Prydz Bay, Antarctica: an assessment through fatty acids and stable isotopes

机译：南极普里兹湾上上到深水区的足足类摄食策略：通过脂肪酸和稳定同位素的评估

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摘要

Information on the feeding strategies and dietary preferences of copepods from epipelagic to bathypelagic zones of the Southern Ocean are important for understanding the role of zooplankton in carbon and energy transfers through the food web. Using fatty acids (FA) and stable isotopic biomarkers, the present study investigated the feeding strategies and trophic niches of seven dominant copepod species (Calanoides acutus, Calanus propinquus, Metridia gerlachei, Rhincalanus gigas, Paraeuchaeta antarctica, Aetideopsis minor and Bathycalanus richardi) collected from various water strata of Prydz Bay, Antarctica during the austral summer of 2013. Copepods showed species-specific and depth-related differences in FA biomarkers and stable isotopic values. C. acutus and C. propinquus had the largest content of long-chain monounsaturated FA, while M. gerlachei had the smallest FA content (approximately 40 mg g(-1) dry weight) and the highest 18:1n-9. FA of R. gigas were dominated by short- and medium-length carbon chains. The species P. antarctica and meso- and bathypelagic species A. minor and B. richardi showed relatively higher levels of carnivorous FA ratios and delta N-15 values. Higher delta N-15 values in M. gerlachei and P. antarctica dwelled in the mesopelagic and bathypelagic zone indicated the high diversity of feeding strategies of these copepods responding to the changing food availability. The flexible feeding strategies of copepods could enable them to utilise different ecological niches and minimise inter- and intra-specific competition in the Prydz Bay.
机译：有关从南部大洋上表带到深海表层的co足类动物的摄食策略和饮食偏好的信息对于了解浮游动物在通过食物网碳和能量转移中的作用非常重要。本研究使用脂肪酸（FA）和稳定的同位素生物标记物，研究了从收集的7种主要co足类物种（Calanoides acutus，Calanus propinquus，Metridia gerlachei，Rhincalanus gigas，Paraeuchaeta antarctica，Aetideopsis minor和Bathycalanus richardi）的摄食策略和营养位。 2013年南半球夏季，南极普里兹湾的不同水层。pe足类动物的FA生物标记物具有特定物种和深度相关的差异，且同位素值稳定。 C. acutus和C.propinquus具有最大含量的长链单不饱和FA，而M. gerlachei具有最小的FA含量（约40 mg g（-1）干重）和最高的18：1n-9。吉氏红藻的FA以短和中等长度的碳链为主。南极假单胞菌和中上层和深浮游物种A. minor和B. richardi显示出相对较高的肉食性FA比率和δN-15值。栖息在中上层和深层上层带中的M. gerlachei和P. antarctica中较高的δN-15值表明这些co足类动物对不断变化的食物可获得性的喂养策略差异很大。 pe足类动物的灵活喂养策略可以使他们利用不同的生态位，并使普里兹湾种间和种内竞争最小化。

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  • 来源
    《Polar biology》 |2018年第7期|1307-1317|共11页
  • 作者

    Yang Guang; Li Chaolun; Wang Yanqing; Peng Quancai;

  • 作者单位

    Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China;

    Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China;

    Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China;

    Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;

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

    Copepods; Prydz Bay; Southern Ocean; Trophic biomarker; Dietary composition; Fatty acids; Stable isotopes;

    机译：pe足类;普兹湾;南大洋;营养生物标志物;饮食组成;脂肪酸;稳定同位素;

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