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Klotzbücher, Thimo ; Kaiser, Klaus ; Stepper, Christoph ; van Loon, Emiel ; Gerstberger, Pedro ; Kalbitz, Karsten:
Long-term litter input manipulation effects on production and properties of dissolved organic matter in the forest floor of a Norway spruce stand.
In: Plant and Soil.
Bd. 355
(2012)
.
- S. 407-416.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-011-1123-1
Abstract
Background and aims: Environmental factors such as climate and atmospheric CO2 control inputs of plantderived matter into soils, which then determines propertiesand decomposition of soil organic matter. We studied how dissolved organic matter (DOM) in forestfloors responded to six years of litter fall manipulationat a spruce site.
Methods: Experimental treatments included (i) ambient litter fall, as well as (ii) reduction or (iii) increase of litter fall, each by 80%.
Results: Reduced litter input did not change fluxes of dissolved organic carbon (DOC), which suggests that much of the mobile DOM in forest floors is not from recent litter but older, partly degraded material. Litter addition increased DOC fluxes over 6 years by 68% (Oi), 23% (Oe) and 12% (Oa). This was mainly due to excessive DOM production in Oi horizons, while net DOM production in Oe and Oa horizons decreased. Upon litter addition, aromaticity and molecule complexity of DOM released from the Oi horizon increased, but decreased for DOM leaving Oa horizons. The results suggest that DOM production by lignin degradation was enhanced in Oi but reduced in Oe and Oa horizons upon litter addition.
Conclusions: Recent litter is not an important source for DOM entering mineral soils, but increased litter input changes organic matter decomposition, thus affecting fluxes and properties of DOM within forest floors.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER104821 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften Forschungseinrichtungen Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 07 Aug 2015 06:59 |
| Letzte Änderung: | 31 Okt 2024 08:41 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/17668 |