Ika Djukic, Sebastian Kepfer-Rojas, Inger Kappel Schmidt, Klaus Steenberg Larsen, Claus Beier, Björn Berg, Kris Verheyen, Adriano Caliman, Alain Paquette, Alba Gutiérrez-Girón, Alberto Humber, Alejandro Valdecantos, Alessandro Petraglia, Heather Alexander, Algirdas Augustaitis, Amélie Saillard, Ana Carolina Ruiz Fernández, Ana I. Sousa, Ana I. Lillebø, Anderson da Rocha Gripp, André Jean Francez, Andrea Fischer, Andreas Bohner, Andrey Malyshev, Andrijana Andrić, Andy Smith, Angela Stanisci, Anikó 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, Bernd Ahrends, Bill Parker, Birgit Sattler, Bo Yang, Bohdan Juráni, Brigitta Erschbamer, Carmen Eugenia Rodriguez Ortiz, Casper T. Christiansen, E. Carol Adair, Céline Meredieu, Cendrine Mony, Charles A. Nock, Chi Ling Chen, Chiao Ping Wang, Christel Baum, Christian Rixen, Christine Delire, Christophe Piscart, Christopher Andrews, Corinna Rebmann, Cristina Branquinho, Dana Polyanskaya, David Fuentes Delgado, Dirk Wundram, Diyaa Radeideh, Eduardo Ordóñez-Regil, Edward Crawford, Elena Preda, Elena Tropina, Elli Groner, Eric Lucot, Erzsébet Hornung, Esperança Gacia, Esther Lévesque, Evanilde Benedito, Evgeny A. Davydov, Evy Ampoorter, Fabio Padilha Bolzan, Felipe Varela, Ferdinand Kristöfel, Fernando T. Maestre, Florence Maunoury-Danger, Florian Hofhansl, Florian Kitz, Flurin Sutter, Francisco Cuesta, Francisco de Almeida Lobo, Franco Leandro de Souza, Frank Berninger, Franz Zehetner, Georg Wohlfahrt, George Vourlitis, Geovana Carreño-Rocabado, Gina Arena, Gisele Daiane Pinha, Grizelle González, Guylaine Canut, Hanna Lee, Hans Verbeeck, Harald Auge, Harald Pauli
Science of the Total Environment 628-629 1369 - 1394 2018年07月01日
[査読有り][通常論文] © 2018 Elsevier B.V. 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.