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Liebmann, Patrick [Verfasser:in]; Mikutta, Robert [Verfasser:in]; Kalbitz, Karsten [Verfasser:in]; Wordell‐Dietrich, Patrick [Verfasser:in]; Leinemann, Timo [Verfasser:in]; Preusser, Sebastian [Verfasser:in]; Mewes, Ole [Verfasser:in]; Perrin, Eike [Verfasser:in]; Bachmann, Jörg [Verfasser:in]; Don, Axel [Verfasser:in]; Kandeler, Ellen [Verfasser:in]; Marschner, Bernd [Verfasser:in]; Schaarschmidt, Frank [Verfasser:in]; Guggenberger, Georg [Verfasser:in]

Biogeochemical limitations of carbon stabilization in forest subsoils - [published Version]

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  • Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Biogeochemical limitations of carbon stabilization in forest subsoils
  • Beteiligte: Liebmann, Patrick [Verfasser:in]; Mikutta, Robert [Verfasser:in]; Kalbitz, Karsten [Verfasser:in]; Wordell‐Dietrich, Patrick [Verfasser:in]; Leinemann, Timo [Verfasser:in]; Preusser, Sebastian [Verfasser:in]; Mewes, Ole [Verfasser:in]; Perrin, Eike [Verfasser:in]; Bachmann, Jörg [Verfasser:in]; Don, Axel [Verfasser:in]; Kandeler, Ellen [Verfasser:in]; Marschner, Bernd [Verfasser:in]; Schaarschmidt, Frank [Verfasser:in]; Guggenberger, Georg [Verfasser:in]
  • Erschienen: Weinheim : Wiley-Vch, 2022
  • Erschienen in: Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde 185 (2022), Nr. 1 ; Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/14229; https://doi.org/10.1002/jpln.202100295
  • ISSN: 1436-8730
  • Schlagwörter: mineral-associated organic carbon ; carbon cycling ; microbial community composition ; climate change mitigation
  • Entstehung:
  • Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Beschreibung: Background: Soils are important carbon (C) sinks or sources and thus of utmost importance for global carbon cycling. Particularly, subsoils are considered to have a high potential for additional C storage due to mineral surfaces still available for sorptive stabilization. Aims: Little information exists about the extent to which additional litter-derived C is transferred to and stabilized in subsoils. This study aimed at evaluating the role of litter-derived dissolved organic matter (DOM) inputs for the formation of stable mineral-associated C in subsoils. Methods: We carried out a multiple-method approach including field labeling with 13C-enriched litter, exposure of 13C-loaded reactive minerals to top- and subsoils, and laboratory sorption experiments. Results: For temperate forest soils, we found that the laboratory-based C sink capacity of subsoils is unlikely to be reached under field conditions. Surface C inputs via litter leachates are little conducive to the subsoil C pool. Only 0.5% of litter-derived C entered the subsoil as DOM within nearly 2 years and most of the recently sorbed C is prone to fast microbial mineralization rather than long-term mineral retention. Desorption to the soil solution and an adapted microbial community re-mobilize organic matter in subsoils faster than considered so far. Conclusions: We conclude that the factors controlling the current mineral retention and stabilization of C within temperate forest subsoils will likewise limit additional C uptake. Thus, in contrast to their widely debated potential to accrue more C, the role of forest subsoils as future C sink is likely overestimated and needs further reconsideration.
  • Zugangsstatus: Freier Zugang