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@ARTICLE{Keller:916936,
      author       = {Keller, Nora and Bol, Roland and Herre, Michael and
                      Marschner, Bernd and Heinze, Stefanie},
      title        = {{C}atchment scale spatial distribution of soil enzyme
                      activities in a mountainous {G}erman coniferous forest},
      journal      = {Soil biology $\&$ biochemistry},
      volume       = {177},
      issn         = {0038-0717},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2023-00203},
      pages        = {108885 -},
      year         = {2023},
      abstract     = {Topography features within catchments influence soil
                      properties, nutrient status, microbial dynamics and
                      ultimately enzyme activities. Extracellular soil enzymes are
                      essential for the decomposition of organic substrates and
                      play a central role in global biogeochemical cycles. How
                      topography and soil properties drive the spatial expression
                      of enzyme activities at the catchment scale is still
                      underexplored, especially in coniferous forest ecosystems.
                      This study investigated the activity of four extracellular
                      soil enzymes: β-glucosidase (β-glu), β-cellobiosidase
                      (β-cello), acid phosphatase (pho) and
                      leucine-aminopeptidase (l-leu) in Oh and Ah horizons of a
                      (27 ha) mountainous coniferous forest catchment
                      (Wüstebach, Eifel National Park, Germany). Spatial patterns
                      and "hot spots" of activities of these four enzymes
                      (involved in C-,N-, and P- cycling) were examined in
                      connection to catchment units differing in slope, exposure
                      and soil type (Cambisol vs. Gleysol), and multiple soil
                      parameters (i.e., moisture content, pH, C, N, P, K, Fe, Mn
                      content, C:N, C:P and N:P ratio). Catchment enzyme
                      activities were overall, except for β-cello, significantly
                      higher in the Oh than Ah horizon. Lower β-glu, and l-leu
                      activities were found where more anaerobic soil conditions
                      did occur, e.g., the river valleys (RV). Neither enhanced Oh
                      horizon erosion on steeper Eastern (ES) and Northeastern
                      (NES) slopes nor larger spatial soil nutrients heterogeneity
                      on Northern (NS) and Western (WS) slopes, did significantly
                      affect enzyme activity. Landscape topography did lead to a
                      spatial variation of the activity of the four enzymes
                      examined. The site-specific variation in C-cycling enzymes
                      (β-glu and β-cello) was most marked at drier East,
                      Northeast and Northern slopes, for P-cycling (pho) within
                      the central wetter river valley but was for N-cycling
                      (l-leu) enzyme activity more homogeneously distributed over
                      the whole catchment. Overall, enzyme activities were
                      strongly correlated to soil properties (especially soil
                      moisture and organic carbon), but locations NS (Wüstebach
                      source area) and RV (Wüstebach river flow path) showed less
                      site-specific correlations. Further refinement of
                      site-specific soil and external factors driving spatial
                      distribution of enzyme activities at catchment scales and
                      beyond will help to further tool up this research at larger
                      spatial scales.},
      cin          = {IBG-3},
      ddc          = {540},
      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:000903499300002},
      doi          = {10.1016/j.soilbio.2022.108885},
      url          = {https://juser.fz-juelich.de/record/916936},
}