Early stage litter decomposition across biomes

Autor(en): Ika Djukic, Sebastian Kepfer-Rojas, Inger Kappel Schmidt, Klaus Steenberg Larsen, Claus Beier, Bjoern Berg, Kris Verheyen, , Adriano Caliman, Alain Paquette, Alba Gutierrez-Giron, Alberto Humber, Alejandro Valdecantos, Alessandro Petraglia, Heather Alexander, Algirdas Augustaitis, Amelie Saillard, Ana Carolina Ruiz Fernandez, Ana I. Sousa, Ana I. Lillebo, Anderson da Rocha Gripp, Andre-Jean Francez, Andrea Fischer, Andreas Bohner, Andrey Malyshev, Andrijana Andric, Andy Smith, Angela Stanisci, Aniko Seres, Anja Schmidt, Anna Avila, Anne Probst, Annie Ouin, Anzar A. Khuroo, Arne Verstraeten, Arely N. Palabral-Aguilera, Artur Stefanski, Aurora Gaxiola, Bart Muys, Bernard Bosman, Birgit Sattler, Brigitta Erschbamer, Florian Hofhansl, Franz Zehetner, Harald Pauli, Markus Wagner, Robert Kanka, Simon Drollinger, Stephan Glatzel, Thomas Zechmeister, Tudor-Mihai Ursu
Abstrakt: Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litter and methodologies, adding major uncertainty to syntheses, comparisons and meta-analyses across different experiments and sites. In the TeaComposition initiative, the potential litter decomposition is investigated by using standardized substrates (Rooibos and Green tea) for comparison of litter mass loss at 336 sites (ranging from −9 to +26 °C MAT and from 60 to 3113 mm MAP) across different ecosystems. In this study we tested the effect of climate (temperature and moisture), litter type and land-use on early stage decomposition (3 months) across nine biomes. We show that litter quality was the predominant controlling factor in early stage litter decomposition, which explained about 65% of the variability in litter decomposition at a global scale. The effect of climate, on the other hand, was not litter specific and explained <0.5% of the variation for Green tea and 5% for Rooibos tea, and was of significance only under unfavorable decomposition conditions (i.e. xeric versus mesic environments). When the data were aggregated at the biome scale, climate played a significant role on decomposition of both litter types (explaining 64% of the variation for Green tea and 72% for Rooibos tea). No significant effect of land-use on early stage litter decomposition was noted within the temperate biome. Our results indicate that multiple drivers are affecting early stage litter mass loss with litter quality being dominant. In order to be able to quantify the relative importance of the different drivers over time, long-term studies combined with experimental trials are needed.
Organisation(en): Department für Botanik und Biodiversitätsforschung, Institut für Geographie und Regionalforschung
Externe Organisation(en): Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft, University of Copenhagen, University of Helsinki, Gävle University College, Ghent University , Universidade Federal do Rio Grande do Norte, Université de Montréal, Universidad Complutense De Madrid, Universidad Católica Campesina de Tiahuanacu, Universidad de Alicante, Università degli studi di Parma, Mississippi State University, Aleksandras Stulginskis University, Centre National De La Recherche Scientifique (CNRS), Universidad Nacional Autonoma de Mexico, University of Aveiro, Universidade Federal do Rio de Janeiro, Université Rennes-I, Leopold-Franzens-Universität Innsbruck, Höhere Bundeslehr- und Forschungsanstalt für Landwirtschaft Raumberg-Gumpenstein, Ernst Moritz Arndt Universität Greifswald, University of Novi Sad (UNS), Bangor University, Università degli Studi del Molise, Szent Istvan University (SZIE), Universitat Autònoma de Barcelona , Université de Toulouse, University of Kashmir, Instituut voor Natuur- en Bosonderzoek, Herbario Nacional de Bolivia, University of Minnesota, Twin Cities, Pontificia Universidad Católica de Chile, Institute of Ecology and Biodiversity (IEB), Katholieke Universiteit Leuven, Université de Liège, Galápagos National Park Directorate, Nordwestdeutsche Forstliche Versuchsanstalt, Komenius Universität, Biologische Station Neusiedler See, Chinese Academy of Sciences (CAS), Helmholtz-Zentrum für Umweltforschung, Universität für Bodenkultur Wien, Österreichische Akademie der Wissenschaften (ÖAW)
Journal: Science of the Total Environment
Band: 628-629
Seiten: 1369-1394
Anzahl der Seiten: 26
ISSN: 0048-9697
DOI: https://doi.org/10.1016/j.scitotenv.2018.01.012
Publikationsdatum: 07-2018
Peer-reviewed: Ja
ÖFOS 2012: 106026 Ökosystemforschung
Schlagwörter
ASJC Scopus Sachgebiete: Pollution, Waste Management and Disposal, Environmental engineering, Environmental Chemistry
Sustainable Development Goals: SDG 15 – Leben an Land, SDG 13 – Maßnahmen zum Klimaschutz
Link zum Portal: https://ucris.univie.ac.at/portal/de/publications/early-stage-litter-decomposition-across-biomes(ff773aaf-3b08-40e2-97b7-a05bba041da0).html

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