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Isotopic evidence of microbial pathways in macroalgal detritus-based coastal food webs.

机译:基于大型藻类碎屑的沿海食物网中微生物途径的同位素证据。

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摘要

Deep subtidal coastal food webs are increasingly a focus of interest among coastal researchers, largely due to the reliance of these systems on subsidies of organic detritus donated from allochthonous sources. To better understand the dynamics of these food webs, researchers have frequently employed multiple stable isotope (MSI) analysis to gain insights on the relative importance and origins of various detritus sources. However, the role of microbial decomposition in these detritus-based food webs has been poorly quantified and frequently overlooked in MSI food web mixing models. In this study, I explicitly examine the ecological and MSI methodological effects of microbial decomposition of algal detritus. This study provides evidence that microbial decomposition of detritus may have cascading trophic effects. The results also suggest that microbial biofilms may act as a distinct trophic level, which can introduce a significant amount of error to MSI mixing models if not accounted for.
机译:在沿海研究人员中,潮下带深海食物网日益成为人们关注的焦点,这主要是由于这些系统依赖于异源捐赠的有机碎屑补贴。为了更好地了解这些食物网的动态,研究人员经常采用多种稳定同位素(MSI)分析来深入了解各种碎屑来源的相对重要性和来源。但是,微生物分解在这些基于碎屑的食物网中的作用已被量化,在MSI食物网混合模型中经常被忽略。在这项研究中,我明确检查了藻类碎屑微生物分解的生态学和MSI方法论效果。该研究提供了碎屑的微生物分解可能具有级联营养作用的证据。该结果还表明,微生物生物膜可能充当了不同的营养级别,如果不考虑这一点,可能会给MSI混合模型带来大量误差。

著录项

  • 作者

    Sosik, Elizabeth A.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Biology Ecology.;Agriculture Fisheries and Aquaculture.;Biology Microbiology.;Agriculture Food Science and Technology.
  • 学位 Masters
  • 年度 2012
  • 页码 72 p.
  • 总页数 72
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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