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Sökning: WFRF:(Tournebize J.)

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1.
  • Pärn, J., et al. (författare)
  • Nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots
  • 2018
  • Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 9:1, s. 1-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Nitrous oxide (N2O) is a powerful greenhouse gas and the main driver of stratospheric ozone depletion. Since soils are the largest source of N2O, predicting soil response to changes in climate or land use is central to understanding and managing N2O. Here we find that N2O flux can be predicted by models incorporating soil nitrate concentration (NO3 -), water content and temperature using a global field survey of N2O emissions and potential driving factors across a wide range of organic soils. N2O emissions increase with NO3 - and follow a bell-shaped distribution with water content. Combining the two functions explains 72% of N2O emission from all organic soils. Above 5 mg NO3 --N kg-1, either draining wet soils or irrigating well-drained soils increases N2O emission by orders of magnitude. As soil temperature together with NO3 - explains 69% of N2O emission, tropical wetlands should be a priority for N2O management.
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2.
  • Mander, Ulo, et al. (författare)
  • Editorial Material: Planning and establishment principles for constructed wetlands and riparian buffer zones in agricultural catchments in ECOLOGICAL ENGINEERING, vol 103, issue , pp 296-300
  • 2017
  • Ingår i: Ecological Engineering. - : ELSEVIER SCIENCE BV. - 0925-8574 .- 1872-6992. ; 103, s. 296-300
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • In a great number of scientific articles on water quality improvement using constructed wetlands (CW) and riparian buffers zones (RBZ) at catchment scale, contradictory results are found. In most cases this is due to underestimating or even ignoring the role of the hydrological factor for water quality improvement. It has often resulted in biased estimates of buffering systems efficiency at catchment scale and, consequently, has caused planning and establishment failures, mistakes and inconsistencies in legislative acts and finally, it has influenced stakeholders willingness to support these eco-technological measures. In this paper we present a short but critical overview of the potential of CWs and RBZs in water quality improvement at catchment scale and highlight the most important aspects to be considered when planning, establishing and managing these systems. (C) 2016 Elsevier B.V. All rights reserved.
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