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首页> 外文期刊>Marine ecology >Using stable isotope analysis to determine the effects of ocean acidification and warming on trophic interactions in a maerl bed community
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Using stable isotope analysis to determine the effects of ocean acidification and warming on trophic interactions in a maerl bed community

机译：使用稳定的同位素分析来确定海洋酸化和升温对MAERL床社区的营养互动的影响

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摘要

Ocean acidification and warming are likely to affect the structure and functioning of marine benthic communities. This study experimentally examined the effects of ocean acidification and warming on trophic interactions within a maerl bed community by using stable carbon and nitrogen isotope analysis. Two three-month experiments were conducted in winter and summer seasons with four different combinations of pCO(2)(ambient and elevated pCO(2)) and temperature (ambient and +3 degrees C). Experimental assemblages were created in tanks held in the laboratory and were composed of calcareous (Lithothamnion corallioides) and fleshy algae (Rhodymenia ardissonei,Solieria chordalis,andUlvasp.), gastropods (Gibbula magusandJujubinus exasperatus), and sea urchins (Psammechinus miliaris). Our results showed higher seaweed availability for grazers in summer than winter. Therefore, grazers were able to adapt their diet seasonally. Increased pCO(2)and temperature did not modify the trophic structure in winter, while shifts in the contribution of seaweed were found in summer. Combined acidification and warming increased the contribution of biofilm in gastropods diet in summer conditions.Psammechinus miliarismostly consumedL. corallioidesunder ambient conditions, while the algaS. chordalisbecame the dominant food source under high pCO(2)in summer. Predicted changes in pCO(2)and temperature had complex effects on assemblage trophic structure. Direct effects of acidification and warming on seaweed metabolism may modify their abundance and biomass, affecting their availability for grazers. Climate change may also modify seaweeds' nutritive value and their palatability for grazers. The grazers we investigated were able to change their diet in response to changes in algal assemblages, an advantage given that warming and acidification alter the composition of algal communities.
机译：海洋酸化和变暖可能会影响海洋底栖社区的结构和运作。本研究通过使用稳定的碳和氮同位素分析，通过使用稳定的碳和氮同位素分析，通过使用稳定的碳和氮同位素分析研究了海洋酸化和升温对Maerl床群落内的营养相互作用的影响。两个三个月的实验是在冬季和夏季进行的，具有四种不同的PCO（2）组合（环境和升高的PCO（2））和温度（环境和+ 3℃）。在实验室持有的坦克中创造了实验组合，并由钙质（锂疗法Corallioides）和肉质藻类（Rhodymenia Ardissonei，Solieria Chordalis，Andulvasp）组成，胃肠杆菌（Gibbula Magusandjujubinus Exasperatus）和海胆（PsammeChinus miliaris）组成。我们的结果表明，夏季比冬季的海藻可用性较高。因此，Grazers能够季节性调整他们的饮食。增加PCO（2）和温度在冬季没有修改营养结构，而夏季则发现海藻的贡献的转变。结合酸化和变暖提高了生物膜在夏季条件下的胃肠杆菌饮食中的贡献。米德米术米术消耗。珊瑚灭绝在环境条件下，而藻类。 Chordalisbamame在夏季高PCO（2）下的主要食物来源。 PCO（2）和温度的预测变化对组合营养结构具有复杂的影响。酸化和升温对海藻代谢的直接影响可能会改变它们的丰富和生物量，影响他们对食草剂的可用性。气候变化也可能修改海藻的营养价值及其对食草剂的适口性。我们调查的格拉斯师能够响应于藻类组合的变化而改变他们的饮食，鉴于变暖和酸化改变了藻类社区的组成。

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  • 来源
    《Marine ecology》 |2020年第5期|e12612.1-e12612.13|共13页
  • 作者

    Legrand Erwann; Martin Sophie; Leroux Cedric; Riera Pascal;

  • 作者单位

    UPMC Univ Paris 06 Sorbonne Univ Stn Biol Roscoff France|CNRS UMR7144 Stn Biol Roscoff France|Inst Marine Res Nordnesgaten 50 N-5005 Bergen Norway;

    UPMC Univ Paris 06 Sorbonne Univ Stn Biol Roscoff France|CNRS UMR7144 Stn Biol Roscoff France;

    UPMC Univ Paris 06 Sorbonne Univ Stn Biol Roscoff France|CNRS FR2424 Stn Biol Roscoff France;

    UPMC Univ Paris 06 Sorbonne Univ Stn Biol Roscoff France|CNRS UMR7144 Stn Biol Roscoff France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    climate change; grazers; macroalgae; pCO(2); stable isotopes; temperature;

    机译：气候变化;Grazers;宏观格子;PCO（2）;稳定同位素;温度;

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