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首页> 外文期刊>Wetlands >PHOSPHORUS AND NITROGEN LEGACY IN A RESTORATION WETLAND, UPPER KLAMATH LAKE, OREGON
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PHOSPHORUS AND NITROGEN LEGACY IN A RESTORATION WETLAND, UPPER KLAMATH LAKE, OREGON

机译：俄勒冈州上克拉玛斯湖恢复湿地中的磷和氮遗产

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摘要

The effects of sediment, ground-water, and surface-water processes on the timing, quantity, and mechanisms of N and P fluxes were investigated in the Wood River Wetland 5-7 years after agricultural practices ceased and seasonal and permanent wetland hydrologies were restored. Nutrient concentrations in standing water largely reflected ground water in winter, the largest annual water source in the closed-basin wetland. High concentrations of total P (22 mg L~(-1)) and total N (30 mg L~(-1)) accumulated in summer when water temperature, air temperature, and evapotranspiration were highest. High positive benthic fluxes of soluble reactive P and ammonium (NH_4~+-N) were measured in two sections of the study area in June and August, averaging 46 and 24 mg m~(-2) d~(-1), respectively. Nonetheless, a wetland mass balance simultaneously indicated a net loss of P and N by assimilation, denitrification (1.1-10.1 mg N m~(-2) h~(-1)), or solute repartitioning. High nutrient concentrations pose a risk for water quality management. Shifts in the timing and magnitude of water inflows and outflows may improve biogeochemical function and water quality by optimizing seed germination and aquatic plant distribution, which would be especially important if the Wood River Wetland was reconnected with hyper-eutrophic Agency Lake.
机译：在停止农业实践并恢复了季节性和永久性湿地水文学后的5-7年内，在伍德河湿地中研究了沉积物，地下水和地表水过程对氮，磷通量的时间，数量和机制的影响。 。死水中的营养物浓度在很大程度上反映了冬季的地下水，这是封闭盆地湿地中最大的年度水源。在夏季，水温，气温和蒸散量最高时，高浓度的总磷（22 mg L〜（-1））和总氮（30 mg L〜（-1））积累。在研究区域的六月和八月的两个区域中测得了可溶性反应性P和铵的高正底通量（NH_4〜+ -N），分别为46和24 mg m〜（-2）d〜（-1）。 。然而，湿地质量平衡同时表明通过同化，反硝化（1.1-10.1 mg N m〜（-2）h〜（-1））或溶质重分配而净损失了P和N。营养素含量高会给水质管理带来风险。水流入和流出时间和幅度的变化可以通过优化种子萌发和水生植物的分布来改善生物地球化学功能和水质，如果伍德河湿地与富营养化的代理湖重新相连，这一点尤其重要。

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  • 来源
    《Wetlands》 |2009年第2期|735-746|共12页
  • 作者

    John H. Duff; Kurt D. Carpenter; Daniel T. Snyder; Karl K. Lee; Ronald J. Avanzino; Frank J. Triska;

  • 作者单位

    U.S. Geological Survey, Water Resources Division 345 Middlefield Road, M.S. 466, Menlo Park, California, USA 94025;

    U.S. Geological Survey, Oregon Water Science Center 2130 SW 5th Ave, Portland, Oregon, USA 97201;

    U.S. Geological Survey, Oregon Water Science Center 2130 SW 5th Ave, Portland, Oregon, USA 97201;

    U.S. Geological Survey, Oregon Water Science Center 2130 SW 5th Ave, Portland, Oregon, USA 97201;

    U.S. Geological Survey, Water Resources Division 345 Middlefield Road, M.S. 466, Menlo Park, California, USA 94025;

    U.S. Geological Survey, Water Resources Division 345 Middlefield Road, M.S. 466, Menlo Park, California, USA 94025;

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

    benthic nutrient flux; denitrification; nutrient mass balance; water budget; water quality;

    机译：底栖营养通量;反硝化营养物质质量平衡;水预算;水质;

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