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首页> 外文期刊>Marine biology >δ~(13)C and δ~(15)N variations in organic matter pools, Mytilus spp. and Macoma balthica along the European Atlantic coast
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δ~(13)C and δ~(15)N variations in organic matter pools, Mytilus spp. and Macoma balthica along the European Atlantic coast

机译：有机物库中的δ〜（13）C和δ〜（15）N变化。和欧洲大西洋沿岸的Macoma balthica

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摘要

Stable carbon (δ~(13)C) and nitrogen (δ~(15)N) isotope (SI) values of sedimentary organic matter (SOM), seston and two dominant bivalves, Mytilus spp. and Macoma balthica, were studied at 18 stations along the European coast in spring and autumn 2004. Three main regions, the Baltic Sea (BS), the North Sea and English Channel (NS), and the Bay of Biscay (BB), were tested for possible geographic (latitudinal) differences in the SI values. In spring, only BS showed lower δ~(13)C values of seston and Mytilus spp., and higher δ~(15) N values of SOM, than NS and BB. No significant differences between the 3 regions were found in autumn. Irrespective of season and regions, Mytilus spp. was more ~(13)C-depleted than M. balthica. δ~(13)C values of M. balthica, but not those of Mytilus spp., were significantly correlated with SOM. These results are consistent with differences in feeding behavior of Mytilus spp. and M. balthica, as the two species are known as obligatory-suspension and facultative-deposit feeders, respectively. In contrast, no differences in the δ~(15)N values of Mytilus spp. and M. balthica were found at individual stations, indicating the same trophic level of the two bivalves within the food webs. At some stations, irrespective of geographic location, both bivalves showed δ~(15)N values up to 18-20 ‰. These were two trophic levels higher than those found at the other stations, indicating local and/or episodic eutrophic conditions, probably due to waste water discharge, and the effectiveness of both Mytilus spp. and M. balthica as bio-indicators of anthropogenic eutrophication. Overall, our results suggest that pathways of energy flow from OM pools to dominant bivalves is more related to local environmental conditions than to geographic regions across the European coastline. This has implications for food web studies along the Atlantic coast because most of the values are consistent over a large area and show no significant differences. Therefore, the present study can be used twofold for the determination of trophic baselines and for the correction of the trophic position of consumers higher up in the food web in the case of differences in waste water discharge.
机译：沉积有机物（SOM）的稳定碳（δ〜（13）C）和氮（δ〜（15）N）同位素（SI）值以及两个优势双壳类Mytilus spp。 2004年春季和秋季，在欧洲海岸的18个站点上研究了波罗的海和马科玛·巴尔蒂卡（Macoma balthica）。波罗的海（BS），北海和英吉利海峡（NS）和比斯开湾（BB）这三个主要区域分别是测试SI值可能存在的地理（纬度）差异。在春季，只有BS的SOM的δ〜（13）C值较低，而SOM的δ〜（15）N值则高于NS和BB。秋季发现这三个区域之间没有显着差异。不论季节和地区如何，Mytilus spp。比苦瓜更〜（13）C耗尽。秃M的δ〜（13）C值与Mytilus spp。的δ〜（13）C值没有显着相关。这些结果与Mytilus spp的摄食行为的差异一致。这两种物种分别被称为强制悬浮饲养者和兼性悬浮饲养者。相反，Mytilus spp的δ〜（15）N值无差异。在各个站点发现了巴氏藻和巴氏杆菌，表明食物网中两个双壳类的营养级相同。在某些站点，无论地理位置如何，两个双壳类动物的δ〜（15）N值均高达18-20‰。这两个营养级比其他站点的营养级高，这表明可能是由于废水排放而造成的局部和/或间歇性富营养化状况，以及两种Mytilus spp的有效性。和M. balthica是人为富营养化的生物指标。总体而言，我们的结果表明，从OM池到主要双壳类动物的能量流动路径与当地环境条件的关系更大，而不是与欧洲海岸线上的地理区域有关。这对大西洋沿岸的食物网研究具有重要意义，因为大多数值在大范围内是一致的，没有显着差异。因此，在废水排放量存在差异的情况下，本研究可用于确定营养基线和校正食物网中较高位置的消费者的营养位置。

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  • 来源
    《Marine biology》 |2013年第3期|541-552|共12页
  • 作者

    P. Magni; S. Rajagopal; S. Como; J. M. Jansen; G. van der Velde; H. Hummel;

  • 作者单位

    Consiglio Nazionale delle Ricerche (CNR), IAMC Istituto per l'Ambiente Marino Costiero, Localita Sa Mardini, Torregrande, 09170 Oristano, Italy,CNR, ISMAR Istituto di Scienze Marine, Arsenale-Tesa 104, Castello 2737/F, 30122 Venice, Italy;

    Department of Animal Ecology and Ecophysiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands;

    Consiglio Nazionale delle Ricerche (CNR), IAMC Istituto per l'Ambiente Marino Costiero, Localita Sa Mardini, Torregrande, 09170 Oristano, Italy;

    Royal Netherlands Institute for Sea Research (NIOZ), Monitor Taskforce, Korringaweg 7, P.O. Box 140,4400 AC Yerseke, The Netherlands;

    Department of Animal Ecology and Ecophysiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands,Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands;

    Royal Netherlands Institute for Sea Research (NIOZ), Monitor Taskforce, Korringaweg 7, P.O. Box 140,4400 AC Yerseke, The Netherlands;

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