@article{8768109,
  abstract     = {{Background Forest soils are considered sinks for atmospheric C. Many studies revealed that tree species and their mycorrhizal association affect forest floor and topsoil organic C (OC) and total N, while the knowledge of their effect on subsoil OC and N is still scarce. Aims We aimed to identify (1) tree species and mycorrhizal association effects on forest floor, topsoil (0-30 cm) and subsoil (30-80 cm) OC and N stocks and vertical distribution and (2) drivers for soil OC and N distribution. Methods We sampled forest floor, topsoil and subsoil under Fagus sylvatica L., Quercus robur L., Acer pseudoplatanus L. and Fraxinus excelsior L. in four Danish common garden experiments along a gradient in soil texture and determined OC and N stocks. Results Total N (forest floor + soil) was higher under oak than beech, while total OC was unaffected by species. Forest floor C and N were higher under oak and beech, both ectomycorrhizal species (ECM), compared to under maple and ash, which are both arbuscular mycorrhizal species (AM). Relatively more OC and N were transferred to the topsoil under AM than ECM species, and this could be explained by greater endogeic earthworm biomass in AM species. In contrast, a higher proportion of OC was stored under ECM than AM species in the subsoil, and here OC correlated negatively with anecic earthworms. Subsoil N was highest under oak. Conclusions Tree species and in particular their mycorrhizal association affected the vertical distribution of soil OC and N. Tree species differences in topsoil OC and N were not mirrored in the subsoil, and this highlights the need to address the subsoil in future studies on AM- versus ECM-mediated soil OC and N stocks.}},
  author       = {{Steffens, Christina and Beer, Christian and Schelfhout, Stephanie and Vesterdal, Lars}},
  issn         = {{1436-8730}},
  journal      = {{JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE}},
  keywords     = {{broadleaved tree species,earthworms,forest floor,mycorrhizal association,soil pH,temperate forest,LITTER DECOMPOSITION,MINERAL SOIL,LEAF-LITTER,STOCKS,TEMPERATE,MATTER,STABILIZATION,MECHANISMS,FRAMEWORK,TURNOVER}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{864--875}},
  title        = {{Tree species affect the vertical distribution of soil organic carbon and total nitrogen}},
  url          = {{http://doi.org/10.1002/jpln.202200165}},
  volume       = {{185}},
  year         = {{2022}},
}

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