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@ARTICLE{Yang:904452,
      author       = {Yang, Kaijun and Yin, Rui and Peñuelas, Josep and Li,
                      Zhijie and Tan, Bo and You, Chengming and Wang, Lixia and
                      Liu, Yang and Zhang, Lijie and Li, Han and Liu, Sining and
                      Chen, Lianghua and Zhang, Jian and Xu, Zhenfeng},
      title        = {{D}ivergent effects of snow exclusion on microbial
                      variables across aggregate size classes},
      journal      = {Catena},
      volume       = {206},
      issn         = {0008-7769},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-06022},
      pages        = {105481 -},
      year         = {2021},
      abstract     = {Projected changes in winter climate can have large
                      implications for the functioning of terrestrial ecosystems.
                      In particular, increased soil frost associated with reduced
                      insulating snow cover can affect the structure and activity
                      of soil microbial communities in cold ecosystems, but little
                      known about the variability of these effects among the
                      fractions of soil aggregates. We used a snow-exclusion
                      experiment to examine the influence of increased soil frost
                      on microbial biomass and activity in aggregate fractions in
                      a Tibetan alpine spruce forest. We measured the
                      concentrations of phospholipid fatty acids (PLFAs) and the
                      activities of extracellular enzymes involved in carbon and
                      nutrient cycling in soil aggregate fractions (<0.25 mm,
                      0.25–2 mm and >2 mm) during early thawing years of 2016
                      and 2017. We found that snow exclusion reduced the
                      concentrations of PLFAs (total, bacterial and fungal) and
                      the activities of enzymes (β-glucosidase,
                      β-N-acetyl-glucosaminidase and acid phosphatase) in three
                      aggregate fractions due to severe abiotic environments, but
                      did not affect the microbial community or enzymatic
                      stoichiometry. Although they varied across the aggregate
                      fractions, soil microbial variables responded to snow
                      exclusion significantly only in the small macroaggregates
                      (0.25–2 mm), which indicated that aggregate size may have
                      a stronger effect than did snow exclusion on microbial
                      variables. Notably, A significant decrease of PLFAs and
                      enzymatic activities in the small macroaggregates under snow
                      exclusion revealed that soil microbes in this fraction were
                      more sensitive to changes in snow cover than in the other
                      aggregate fractions. These findings highlight the ecological
                      importance of microbial processes in aggregates in Tibetan
                      forests experiencing large decreases in snowfall.},
      cin          = {IBG-3},
      ddc          = {550},
      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:000688449100009},
      doi          = {10.1016/j.catena.2021.105481},
      url          = {https://juser.fz-juelich.de/record/904452},
}