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Rationale for Control of Anthropogenic Nitrogen and Phosphorus to Reduce Eutrophication of Inland Waters

机译:控制人为氮和磷减少内陆水体富营养化的理由

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摘要

Concentrations of phosphorus and nitrogen in surface waters are being regulated in the United States and European Union. Human activity has raised the concentrations of these nutrients, leading to eutrophication of inland waters, which causes nuisance growth of algae and other aquatic plants. Control of phosphorus often has had the highest priority because of its presumed leading role in limiting development of aquatic plant biomass. Experimental evidence shows, however, that nitrogen is equally likely to limit growth of algae and aquatic plants in inland waters, and that additions of both nutrients cause substantially more algal growth than either added alone. A dual control strategy for N and P will reduce transport of anthropogenic nitrogen through drainage networks to aquatic ecosystems that may be nitrogen limited. Control of total phosphorus in effluents is feasible and is increasingly being required by regulations. The control strategy for nitrogen in effluents is' more difficult, but could be made more feasible by recognition that a substantial portion of dissolved organic nitrogen is not bioavailable; regulation should focus on bioavailable N (nitrate, ammonium, and some dissolved organic nitrogen) rather than total N. Regulation of both N and P also is essential for nonpoint sources.
机译:美国和欧盟正在规范地表水中磷和氮的浓度。人类活动提高了这些营养素的浓度,导致内陆水域富营养化,这导致藻类和其他水生植物的滋扰性增长。由于磷在限制水生植物生物量的发展中起主导作用,因此磷的控制往往具有最高的优先权。但是,实验证据表明,氮同样有可能限制内陆水域中藻类和水生植物的生长,并且两种营养素的添加所引起的藻类生长比单独添加任何一种都要多。氮和磷的双重控制策略将减少人为氮通过排水网络向可能受到氮限制的水生生态系统的运输。废水中总磷的控制是可行的,法规越来越要求。废水中氮的控制策略较为困难,但可以通过认识到大部分溶解的有机氮无法生物利用而使之更加可行。监管应着重于生物可利用的氮(硝酸盐,铵和一些溶解的有机氮),而不是总氮。氮和磷的监管对非点源也必不可少。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第24期|p.10300-10305|共6页
  • 作者单位

    Cooperative Institute for Research in Environmental Sciences, Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado 80309-0216, United States;

    Department of Watershed Sciences and the Ecology Center, Utah State University, Logan, Utah 84322-5210, United States;

    Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, North Carolina 28557, United States;

  • 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
  • 中图分类
  • 原文服务方 国家工程技术数字图书馆
  • 关键词

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