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Historical changes of sedimentary P-binding forms and their ecological driving mechanism in a typical 'grass-algae' eutrophic lake

机译：典型“草藻”Eutrophic湖中沉积P绑定形式及其生态驱动机制的历史变迁

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摘要

With the transformation of lake ecosystem from "clear water" to "turbid water", the residual phosphorus (P) accumulated in sediments may slow down the process of aquatic ecological restoration, and the related mechanisms are complex and need to be better understood. In this study, high-resolution systematic investigation and analysis of P-binding forms in the sediments showed that Lake Dianchi, the largest plateau lake in Southwest China, was enriched with NaOH-rP, HCl-P and Res-P, but depleted in NH4Cl-P, BD-P and NaOH-nrP. The BD-P, NaOH-nrP and NaOH-rP were the main contributors to potential P release from sediments, while the release potential of NH4Cl-P was relatively weak (1%). When the external P loading gradually decreased, the internal P loading of Lake Dianchi was estimated to be 522 mg P/(m(2).a) in the past 30 years. The succession of "grass-algae type in Lake Dianchi coincided with reduced absorption and transformation of potential mobile P and decreased accumulation of stable P, especially the Res-P. Meanwhile, the temporal variation of potential mobile P was a good predictor of ecological degradation and reduced ecosystem sustainability in Lake Dianchi.
机译：随着湖泊生态系统的转化从“透明水”到“浑水”，沉积物中累积的残留磷（P）可能会减缓水生生态恢复过程，并且相关机制很复杂，需要更好地理解。在这项研究中，高分辨率系统调查和对沉积物中的p绑定形式的分析表明，滇西最大的高原湖泊湖，富含NaOH-RP，HCl-P和Res-P，但耗尽NH4CL-P，BD-P和NaOH-NRP。 BD-P，NaOH-NRP和NaOH-RP是从沉积物潜在P释放的主要贡献者，而NH4Cl-P的释放电位相对较弱（＆ 1％）。当外部P加载逐渐降低时，滇池的内部P载荷估计在过去30年中为522mg p /（m（2）.a）。 “滇池湖藻类的继承恰逢潜在流动P的吸收和转化并降低了稳定P的积累，特别是res-p。同时，潜在移动P的时间变化是生态降解的良好预测因子并降低了滇迪湖的生态系统可持续性。

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  • 来源
    《Water Research》 |2021年第1期|117604.1-117604.11|共11页
  • 作者

    Ding Shuai; Liu Yan; Dan Solomon Felix; Jiao Lixin;

  • 作者单位

    Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Beijing 100012 Peoples R China|Minist Ecol & Environm Peoples Republ China Environm Stand Inst Beijing 100012 Peoples R China;

    Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Beijing 100012 Peoples R China|Minist Ecol & Environm Peoples Republ China Environm Stand Inst Beijing 100012 Peoples R China;

    Beibu Gulf Univ Guangxi Key Lab Marine Disaster Beibu Gulf Qinzhou 535011 Peoples R China;

    Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Beijing 100012 Peoples R China|Chinese Res Inst Environm Sci Natl Engn Lab Lake Pollut Control & Ecol Restorat Beijing 100012 Peoples R China|Chinese Res Inst Environm Sci Inst Water Environm Res Beijing 100012 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sedimentary P-binding forms; Accumulation; Release mechanisms; Ecological factors; Lake Dianchi;

    机译：沉积p绑定形式;积累;释放机制;生态因素;滇池湖;

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