An Experiment with Forced Oxygenation of the Deepwater of the Anoxic By Fjord, Western Sweden

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• 作者：Anders Stigebrandt (1)
  Bengt Liljebladh (1)
  Loreto de Brabandere (2)
  Michael Forth (3)
  脜ke Granmo (4)
  Per Hall (5)
  Jonatan Hammar (4)
  Daniel Hansson (6)
  Mikhail Kononets (7)
  Marina Magnusson (4)
  Fredrik Nor茅n (8)
  Lars Rahm (9)
  Alexander H. Treusch (3)
  Lena Viktorsson (1)
  
  1. Department of Geosciences ; University of Gothenburg ; Box 460 ; 405 30 ; G枚teborg ; Sweden
  2. Analytical and Environmental Chemistry ; Vrije Universiteit Brussel ; Pleinlaan 2 ; 1050 ; Brussels ; Belgium
  3. Nordic Center for Earth Evolution Institute of Biology ; University of Southern Denmark ; 5230 ; Odense M ; Denmark
  4. Marine Monitoring AB ; Strandv盲gen 9 ; 453 30 ; Lysekil ; Sweden
  5. Department of Chemistry and Molecular Biology Marine Chemistry ; University of Gothenburg ; 412 96 ; G枚teborg ; Sweden
  6. Swedish Institute for the Marine Environment ; Box 260 ; 405 30 ; G枚teborg ; Sweden
  7. Department of Chemistry and Molecular Biology ; Marine Chemistry ; University of Gothenburg ; 412 96 ; G枚teborg ; Sweden
  8. IVL Swedish Environmental Research Institute ; Rosviksgatan 12 ; 45330 ; Lysekil ; Sweden
  9. Department of Thematic Studies ; Water and Environmental Studies ; Link枚ping University ; 581 83 ; Link枚ping ; Sweden
  
• 关键词：Deepwater oxygenation ; Environmental engineering ; Anoxia ; Ecological effects ; Sediment colonization ; Phosphorus
• 刊名：AMBIO
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：44
• 期：1
• 页码：42-54
• 全文大小：3,755 KB
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• 刊物类别：Earth and Environmental Science
• 出版者：Springer Netherlands
• ISSN：1654-7209

文摘

In a 2.5-year-long environmental engineering experiment in the By Fjord, surface water was pumped into the deepwater where the frequency of deepwater renewals increased by a factor of 10. During the experiment, the deepwater became long-term oxic, and nitrate became the dominating dissolved inorganic nitrogen component. The amount of phosphate in the water column decreased by a factor of 5 due to the increase in flushing and reduction in the leakage of phosphate from the sediments when the sediment surface became oxidized. Oxygenation of the sediments did not increase the leakage of toxic metals and organic pollutants. The bacterial community was the first to show changes after the oxygenation, with aerobic bacteria also thriving in the deepwater. The earlier azoic deepwater bottom sediments were colonized by animals. No structural difference between the phytoplankton communities in the By Fjord and the adjacent Havsten Fjord, with oxygenated deepwater, could be detected during the experiment.