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首页> 外文期刊>Environmental Science & Technology >Stable Isotopes and Bayesian Modeling Methods of Tracking Sources and Differentiating Bioavailable and Recalcitrant Phosphorus Pools in Suspended Particulate Matter
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Stable Isotopes and Bayesian Modeling Methods of Tracking Sources and Differentiating Bioavailable and Recalcitrant Phosphorus Pools in Suspended Particulate Matter

机译：悬浮颗粒物中痕量来源和区分生物利用度和难处理性磷库的稳定同位素和贝叶斯建模方法

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摘要

Understanding the sources of different phosphorus (P) pools and their bioavailability under imposed biogeochemical environments in a watershed is limited largely due to the lack of appropriate methods. In this research, phosphate oxygen isotope ratios and Bayesian modeling on fingerprinting elements were applied as two novel methods to identify sources and relative recalcitrancy of particulate P pools suspended in water in the continuum of sources from land to the mouth of a coastal estuary to the Chesapeake Bay. Comparative analyses of sizes, relative ratios, and oxygen isotope values of particulate P pools in the creek water suggested that the NaHCO3-P pool was bioavailable, whereas NaOH-P and HCl-P pools were recalcitrant during P transport along the creek. Agricultural field soil, streambank, and river bottom sediments were major sources of particulate P and their contributions varied significantly at the headwater and downstream regions of the creek. Bayesian modeling based on fingerprinting elements suggested that tides played a major role in forming particulate matter from estuarine sources at the creek mouth region and importing it upstream. These findings provide new insights into the origin and fate of particulate P and the fidelity of isotope and fingerprinting methods in source tracking of P in tidally influenced watersheds.
机译：由于缺乏适当的方法，在很大程度上限制了对流域内强加的生物地球化学环境下不同磷（P）库的来源及其生物利用度的了解受到很大限制。在这项研究中，采用磷酸盐氧同位素比率和指纹元素的贝叶斯模型作为两种新方法，来识别从陆源到沿海河口至切塞皮克犬口的连续源中悬浮在水中的颗粒P池的来源和相对难分解性。湾。对小溪水中颗粒物P池的大小，相对比率和氧同位素值进行的比较分析表明，NaHCO3-P池具有生物利用度，而NaOH-P和HCl-P池在沿小河的P输送过程中具有顽固性。农田土壤，河岸和河底沉积物是颗粒物P的主要来源，其贡献在小河上游和下游地区变化很大。基于指纹元素的贝叶斯模型表明，潮汐在河口地区河口源形成颗粒物并将其进口到上游的过程中起了主要作用。这些发现为潮汐影响的流域中磷的来源追踪提供了颗粒物P的来源和结局以及同位素保真度和指纹方法的新见解。

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  • 来源
    《Environmental Science & Technology》 |2019年第1期|69-76|共8页
  • 作者

    Mingus Kristi A.; Liang Xiaomeng; Massoudieh Arash; Jaisi Deb P.;

  • 作者单位

    Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19716 USA;

    Catholic Univ Amer, Civil Engn Dept, Washington, DC 20064 USA;

    Catholic Univ Amer, Civil Engn Dept, Washington, DC 20064 USA;

    Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19716 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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