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@ARTICLE{Tan:916937,
      author       = {Tan, Yuechen and Wang, Yifei and Chen, Zhu and Yang,
                      Mengying and Ning, Yu and Zheng, Chunyan and Du, Zhangliu
                      and Bol, Roland and Wu, Di},
      title        = {{L}ong-term artificial drainage altered the product
                      stoichiometry of denitrification in alpine peatland soil of
                      {Q}inghai-{T}ibet {P}lateau},
      journal      = {Geoderma},
      volume       = {428},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2023-00204},
      pages        = {116206 -},
      year         = {2022},
      abstract     = {Peatlands, which play a vital role in the global storage of
                      carbon (C) and nitrogen (N), have been artificially drained
                      worldwide over the last few decades. However, the effects of
                      long-term artificial drainage on the soil N cycle and
                      subsequent potent greenhouse gas emissions in peatland soils
                      are not fully understood. In this study, we investigated the
                      effect of drainage on soil properties, aboveground and
                      belowground community compositions, and the N cycle-related
                      functional gene abundances in the world's largest alpine
                      peatland (Zoige Peatland, Qinghai-Tibet Plateau), which has
                      been artificially drained for the past 50 years. We further
                      examined the different responses of soil-borne CO2, N2O, and
                      N2 emissions to three successive “hot moment” events
                      (rewetting, nitrogen deposition, and an oxic-to-anoxic
                      transition) between the drained and natural alpine peatlands
                      using a robotized continuous flow system under an He/O2
                      atmosphere. A markedly lower CO2 flux $(34\%)$ was observed
                      in drained peatlands compared to natural peatlands, likely
                      associated with the increased soil bulk density, plant
                      species diversity, and microbial diversity in the former.
                      The N2O emissions in the drained peatland were $45\%$ lower
                      than those in the natural peatland under oxic conditions,
                      with the 15N-N2O site-preference (SP) value indicating a
                      higher denitrification contribution in the drained peatland
                      $(57\%)$ than in the natural peatland $(42\%).$ In contrast,
                      under anoxic conditions, higher N2O emissions $(52\%),$
                      lower denitrification rates $(20\%),$ lower denitrification
                      functional gene abundances (nirK: $34\%;$ nirS: $19\%;$
                      nosZ: $24\%),$ and lower N2 emissions $(36\%)$ were observed
                      in drained peatlands than in natural alpine peatlands.
                      Molecular analyses further suggested that the different
                      responses of N2O emissions might be driven by the reshaping
                      of microbial communities, which are strongly affected by
                      changes in the soil physicochemical properties. Our results
                      indicate that drainage is unfavorable in terms of greenhouse
                      gases (GHGs) emissions in peatlands and that rewetting the
                      Zoige alpine peatlands should be considered as a smart
                      option from a climatic perspective in the future.},
      cin          = {IBG-3},
      ddc          = {910},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000918743800004},
      doi          = {10.1016/j.geoderma.2022.116206},
      url          = {https://juser.fz-juelich.de/record/916937},
}