Auteur(s) :Ika Djukic, Sebastian Kepfer-Rojas, Inge Schmidt, Klaus Steenberg Klaus, Claus Beier, Björn Berg, Kris K. Verheyen, Adriano Adrian, Alain Paquette, Alba Gutiérrez-Girón, Alberto Humbert, Alejandro Valdecantos, Alessandro Petraglia, Heather Alexander, Algirdas Augustaitis, Amelie Saillard, Ana Carolina Ruiz Fernandez, Ana Sousa, Ana Lillebø, Anderson da Rocha Gripp, André-Jean Francez, Andrea Fischer, Andreas Bohner, Andrey Malyshev, Andrijana Andrić, Angela Stanisci, Anikó Seres, Anja Schmidt, Anna Avila, Anne Probst, Annie Ouin, Anzar Khuroo, Arne Verstraeten, Arely 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 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 Davydov, Evy Ampoorter, Fabio Padilha Bolzan, Felipe Varela, Ferdinand Kristöfel, Fernando T. Maestre, Florence 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, Hassan Bismarck Nacro, Héctor Bahamonde, Heike Feldhaar, Heinke Jäger, Helena Serrano, Hélène Verheyden, Helge Bruelheide, Henning Meesenburg, Hermann Jungkunst, Hervé Jactel, Hideaki Shibata, Hiroko Kurokawa, Hugo Lopez Garcia, Hugo Rojas Villalobos, Ian Yesilonis, Inara Melece, Inge van Halder, Inmaculada García Quirós, Isaac Makelele, Issaka Senou, István Fekete, Ivan Mihal, Ivika Ostonen, Jana Borovská, Javier Roales, Jawad Shoqeir, Jean-Christophe Lata, Jean-Paul Theurillat, Jean-Luc Probst, Jess Zimmerman, Jeyanny Vijayanathan, Jianwu Tang, Jill Thompson, Jiří Doležal, Joan-Albert Sanchez-Cabeza, Joel Merlet, Joh Henschel, Johan Neirynck, Johannes Knops, John Loehr, Jonathan von Oppen, Jörg Löffler, José-Gilberto Cardoso-Mohedano, José-Luis Benito-Alonso, José Marcelo Torezan, Josef Morina, Juan Jiménez, Juan Dario Quinde, Juha Alatalo, Julia Seeber, Jutta Stadler, Kaie Kriiska, Kalifa Coulibaly, Karibu Fukuzawa, Katalin Szlavecz, Katarína Gerhátová, Kate Lajtha, Kathrin Käppeler, Katie Jennings, Katja Tielbörger, Kazuhiko Hoshizaki, Ken Green, Lambiénou Yé, Laryssa Helena Ribeiro Pazianoto, Laura Dienstbach, Laura Williams, Laura Yahdjian, Laurel Brigham, Liesbeth van den Brink, Lindsey Rustad, Lipeng Zhang, Lourdes Morillas, Lu Xiankai, Luciana Silva Carneiro, Luciano Di Martino, Luis Villar, Maaike Bader, Madison Morley, Marc Lebouvier, Marcello Tomaselli, Marcelo Sternberg, Marcus C. Schaub, Margarida Santos-Reis, Maria Glushkova, María Guadalupe Almazán Torres, Marie-Andrée Giroux, Marie-Anne de Graaff, Marie-Noëlle Pons, Marijn Bauters, Marina Mazón, Mark Frenzel, Markus Didion, Markus Wagner, Maroof Hamid, Marta Lopes, Martha Apple, Martin Schädler, Martin Weih, Matteo Gualmini, Matthew Vadeboncoeur, Michael Bierbaumer, Michaël Danger, Michael Liddell, Michael Mirtl, Michael Scherer-Lorenzen, Michal Růžek, Michele Carbognani, Michele Di Musciano, Michinari Matsushita, Miglena Zhiyanski, Mihai Pușcaș, Milan Barna, Mioko Ataka, Mo Jiangming, Mohammed Alsafran, Monique Carnol, Nadia Barsoum, Naoko Tokuchi, Nico Eisenhauer, Nicolas Lecomte, Nina Filippova, Norbert Hölzel, Olga Ferlian, Oscar Romero, Osvaldo Pinto, Pablo Peri, Paige Weber, Pascal Vittoz, Pavel Dan Turtureanu, Peter Fleischer, Peter Macreadie, Peter Haase, Peter Reich, Petr Petřík, Philippe Choler, Pierre Marmonier, Priscilla Muriel, Quentin Ponette, Rafael Dettogni Guariento, Rafaella Canessa, Ralf Kiese, Rebecca Hewitt, Regin Rønn, Rita Adrian, Róbert Kanka, Robert Weigel, Roberto Cazzolla Gatti, Rodrigo Lemes Martins, Romain Georges, Rosa Isela Ise, Rosario Gavilán, Sabyasachi Dasgupta, Sally Wittlinger, Sara Puijalon, Sarah Freda, Satoshi Sato, Sean Charles, Sébastien Gogo, Simon Drollinger, Simone Mereu, Sonja Wipf, Stacey Trevathan-Tackett, Stefan Löfgren, Stefan Stoll, Stefan Trogisch, Stefanie Hoeber, Steffen Seitz, Stephan Glatzel, Sue Milton, Sylvie Dousset, Taiki Mori, Takanori Sato, Takeshi Ise, Takuo Hishi, Tanaka Kenta, Tatsuro Nakaji, Thaisa Sala Michelan, Thierry Camboulive, Thomas Mozdzer, Thomas Scholten, Thomas Spiegelberger, Thomas Zechmeister, Till Kleinebecker, Tsutom Hiura, Tsutomu Enoki, Tudor-Mihai Ursu, Umberto Morra Di Cella, Andy Smith, Ute Hamer, Valentin Klaus, Vanessa Mendes Rêgo, Valter Di Cecco, Verena Busch, Veronika Fontana, Veronika Piscová, Victoria Carbonell, Victoria Ochoa, Vincent Bretagnolle, Vincent Maire, Vinicius Farjalla, Wenjun Zhou, Wentao Luo, William Mcdowell, Yalin Hu, Yasuhiro Utsumi, Yuji Kominami, Yulia Zaika, Yury Rozhkov, Zsolt Kotroczó, Zsolt Tóth
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.
Mots-clés
litter decomposition, litter quality, litter mass loss, climate effects on decomposition, temperature, soil moisture, land use, biomes, rooibos, green tea, terrestrial carbon cycle, Tea bag, Rooibos tea, TeaComposition initiative, Carbon turnover