...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological Applications >Engineered nanoparticles interact with nutrients to intensify eutrophication in a wetland ecosystem experiment
【24h】

Engineered nanoparticles interact with nutrients to intensify eutrophication in a wetland ecosystem experiment

机译：工程纳米粒子与营养成分相互作用，以加强湿地生态系统实验中的富营养化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Despite the rapid rise in diversity and quantities of engineered nanomaterials produced, the impacts of these emerging contaminants on the structure and function of ecosystems have received little attention from ecologists. Moreover, little is known about how manufactured nanomaterials may interact with nutrient pollution in altering ecosystem productivity, despite the recognition that eutrophication is the primary water quality issue in freshwater ecosystems worldwide. In this study, we asked two main questions: (1) To what extent do manufactured nanoparticles affect the biomass and productivity of primary producers in wetland ecosystems? (2) How are these impacts mediated by nutrient pollution? To address these questions, we examined the impacts of a citrate-coated gold nanoparticle (AuNPs) and of a commercial pesticide containing Cu(OH)2 nanoparticles (CuNPs) on aquatic primary producers under both ambient and enriched nutrient conditions. Wetland mesocosms were exposed repeatedly with low concentrations of nanoparticles and nutrients over the course of a 9- month experiment in an effort to replicate realistic field exposure scenarios. In the absence of nutrient enrichment, there were no persistent effects of AuNPs or CuNPs on primary producers or ecosystem productivity. However, when combined with nutrient enrichment, both NPs intensified eutrophication. When either of these NPs were added in combination with nutrients, algal blooms persisted for >50 d longer than in the nutrient-only treatment. In the AuNP treatment, this shift from clear waters to turbid waters led to large declines in both macrophyte growth and rates of ecosystem gross primary productivity (average reduction of 52% ± 6% and 92% ± 5%, respectively) during the summer. Our results suggest that nutrient status greatly influences the ecosystem-scale impact of two emerging contaminants and that synthetic chemicals may be playing an under-appreciated role in the global trends of increasing eutroph
机译：尽管产生了多样性和数量的工程纳米材料，但这些新兴污染物对生态系统的结构和功能的影响已经受到生态学家的影响。此外，尽管认识到富营养化是全球淡水生态系统中的初级水质问题，但纳米材料如何与改变生态系统生产率的营养污染相互作用，毫无疑问。在这项研究中，我们询问了两个主要问题：（1）制造的纳米粒子在多大程度上影响湿地生态系统中原发生产物的生物量和生产率？ （2）营养污染介导的这些影响如何？为了解决这些问题，我们检查了柠檬酸涂层的金纳米粒子（AUNP）和含有Cu（OH）2纳米颗粒（CUNP）的商业杀虫剂在Aniatic Primdrainders的营养条件下的影响。在9个月的实验过程中，在9个月的实验过程中，湿地培养较低的纳米颗粒和营养物质近似地暴露。在没有营养富集的情况下，肛门或CUNP对初级生产者或生态系统生产率没有持续的影响。然而，当与营养富集结合时，既加剧了富营养化。当其中任何一种NPS与营养素组合加入时，藻类绽放持续超过> 50d，而不是仅营养的处理。在AUNP处理中，从透明水转移到浑浊水域导致麦克力生长和生态系统总初级生产率的大幅下降（分别降低52％±6％，分别为92％±5％）。我们的研究结果表明，营养状况极大地影响了两种新兴污染物的生态系统规模影响，并且合成化学品可能在增加Eutroph的全球趋势中发挥普遍的作用

著录项

  • 来源
    《Ecological Applications》 |2018年第6期|共15页
  • 作者

    MARIE SIMONIN; BENJAMIN P. COLMAN; STEVEN M. ANDERSON; RYAN S. KING; MATTHEW T. RUIS; ASTRID AVELLAN; CHRISTINA M. BERGEMANN; BRITTANY G. PERROTTA; NICHOLAS K. GEITNER; MENGCHI HO; BELEN DE LA BARRERA; JASON M. UNRINE; GREGORY V. LOWRY; CURTIS J. RICHARDSON; MARK R. WIESNER; EMILY S. BERNHARDT;

  • 作者单位

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

    Center for the Environmental Implications of Nanotechnology (CEINT) Duke University Durham North Carolina 27708 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
  • 关键词

    algae; algal bloom; aquatic ecosystems; copper nanoparticles; Egeria; eutrophication; gold nanoparticles; macrophytes; multiple stressors; nanomaterial; nutrients;

    机译：藻类;藻类绽放;水生生态系统;铜纳米粒子;egercog;富营养化;金纳米颗粒;宏观物质;多重压力源;纳米材料;养分;营养素;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号