AUTHOR=Kwon TaeOh , Shibata Hideaki , Kepfer-Rojas Sebastian , Schmidt Inger K. , Larsen Klaus S. , Beier Claus , Berg Björn , Verheyen Kris , Lamarque Jean-Francois , Hagedorn Frank , Eisenhauer Nico , Djukic Ika , TeaComposition Network , Kwon TaeOh , Shibata Hideaki , Kepfer-Rojas Sebastian , Schmidt Inger Kappel , Larsen Klaus Steenberg , Beier Claus , Berg Björn , Verheyen Kris , Lamarque Jean Francois , Hagedorn Frank , Eisenhauer Nico , Djukic Ika , Caliman Adriano , Paquette Alain , Gutiérrez-Girón Alba , Petraglia Alessandro , Augustaitis Algirdas , Saillard Amélie , Ruiz-Fernández Ana Carolina , Sousa Ana I. , Lillebø Ana I. , Gripp Anderson da Rocha , Lamprecht Andrea , Bohner Andreas , Francez André-Jean , Malyshev Andrey , Andrić Andrijana , Stanisci Angela , Zolles Anita , Avila Anna , Virkkala Anna-Maria , Probst Anne , Ouin Annie , Khuroo Anzar A. , Verstraeten Arne , Stefanski Artur , Gaxiola Aurora , Muys Bart , Gozalo Beatriz , Ahrends Bernd , Yang Bo , Erschbamer Brigitta , Ortíz Carmen Eugenia Rodríguez , Christiansen Casper T. , Meredieu Céline , Mony Cendrine , Nock Charles , Wang Chiao-Ping , Baum Christel , Rixen Christian , Delire Christine , Piscart Christophe , Andrews Christopher , Rebmann Corinna , Branquinho Cristina , Jan Dick , Wundram Dirk , Vujanović Dušanka , Adair E. Carol , Ordóñez-Regil Eduardo , Crawford Edward R. , Tropina Elena F. , Hornung Elisabeth , Groner Elli , Lucot Eric , Gacia Esperança , Lévesque Esther , Benedito Evanilde , Davydov Evgeny A. , Bolzan Fábio Padilha , Maestre Fernando T. , Maunoury-Danger Florence , Kitz Florian , Hofhansl Florian , Sutter Flurin , Lobo Francisco de Almeida , Souza Franco Leadro , Zehetner Franz , Koffi Fulgence Kouamé , Wohlfahrt Georg , Certini Giacomo , Pinha Gisele Daiane , González Grizelle , Canut Guylaine , Pauli Harald , Bahamonde Héctor A. , Feldhaar Heike , Jäger Heinke , Serrano Helena Cristina , Verheyden Hélène , Bruelheide Helge , Meesenburg Henning , Jungkunst Hermann , Jactel Hervé , Kurokawa Hiroko , Yesilonis Ian , Melece Inara , Halder Inge van , Quirós Inmaculada García , Fekete István , Ostonen Ivika , Borovská Jana , Roales Javier , Shoqeir Jawad Hasan , Lata Jean-Christophe , Probst Jean-Luc , Vijayanathan Jeyanny , Dolezal Jiri , Sanchez-Cabeza Joan-Albert , Merlet Joël , Loehr John , Oppen Jonathan von , Löffler Jörg , Alonso José Luis Benito , Cardoso-Mohedano José-Gilberto , Peñuelas Josep , Morina Joseph C. , Quinde Juan Darío , Jiménez Juan J. , Alatalo Juha M. , Seeber Julia , Kemppinen Julia , Stadler Jutta , Kriiska Kaie , Meersche Karel Van den , Fukuzawa Karibu , Szlavecz Katalin , Juhos Katalin , Gerhátová Katarína , Lajtha Kate , Jennings Katie , Tielbörger Katja , Hoshizaki Kazuhiko , Green Ken , Steinbauer Klaus , Pazianoto Laryssa , Dienstbach Laura , Yahdjian Laura , Williams Laura J. , Brigham Laurel , Hanna Lee , Brink Liesbeth van den , Rustad Lindsey , Morillas Lourdes , Carneiro Luciana Silva , Martino Luciano Di , Villar Luis , Tavares Luísa Alícida Fernandes , Morley Madison , Winkler Manuela , Lebouvier Marc , Tomaselli Marcello , Schaub Marcus , Glushkova Maria , Torres Maria Guadalupe Almazan , Graaff Marie-Anne de , Pons Marie-Noëlle , Bauters Marijn , Mazón Marina , Frenzel Mark , Wagner Markus , Didion Markus , Hamid Maroof , Lopes Marta , Apple Martha , Weih Martin , Mojses Matej , Gualmini Matteo , Vadeboncoeur Matthew , Bierbaumer Michael , Danger Michael , Scherer-Lorenzen Michael , Růžek Michal , Isabellon Michel , Musciano Michele Di , Carbognani Michele , Zhiyanski Miglena , Puşcaş Mihai , Barna Milan , Ataka Mioko , Luoto Miska , Alsafaran Mohammed H. , Barsoum Nadia , Tokuchi Naoko , Korboulewsky Nathalie , Lecomte Nicolas , Filippova Nina , Hölzel Norbert , Ferlian Olga , Romero Oscar , Pinto-Jr Osvaldo , Peri Pablo , Turtureanu Pavel Dan , Haase Peter , Macreadie Peter , Reich Peter B. , Petřík Petr , Choler Philippe , Marmonier Pierre , Ponette Quentin , Guariento Rafael Dettogni , Canessa Rafaella , Kiese Ralf , Hewitt Rebecca , Weigel Robert , Kanka Róbert , Gatti Roberto Cazzolla , Martins Rodrigo Lemes , Ogaya Romà , Georges Romain , Gavilán Rosario G. , Wittlinger Sally , Puijalon Sara , Suzuki Satoshi , Martin Schädler , Anja Schmidt , Gogo Sébastien , Schueler Silvio , Drollinger Simon , Mereu Simone , Wipf Sonja , Trevathan-Tackett Stacey , Stoll Stefan , Löfgren Stefan , Trogisch Stefan , Seitz Steffen , Glatzel Stephan , Venn Susanna , Dousset Sylvie , Mori Taiki , Sato Takanori , Hishi Takuo , Nakaji Tatsuro , Jean-Paul Theurillat , Camboulive Thierry , Spiegelberger Thomas , Scholten Thomas , Mozdzer Thomas J. , Kleinebecker Till , Rusňák Tomáš , Ramaswiela Tshililo , Hiura Tsutom , Enoki Tsutomu , Ursu Tudor-Mihai , Cella Umberto Morra di , Hamer Ute , Klaus Valentin , Cecco Valter Di , Rego Vanessa , Fontana Veronika , Piscová Veronika , Bretagnolle Vincent , Maire Vincent , Farjalla Vinicius , Pascal Vittoz , Zhou Wenjun , Luo Wentao , Parker William , Utsumi Yasuhiro , Kominami Yuji , Kotroczó Zsolt , Tóth Zsolt TITLE=Effects of Climate and Atmospheric Nitrogen Deposition on Early to Mid-Term Stage Litter Decomposition Across Biomes JOURNAL=Frontiers in Forests and Global Change VOLUME=4 YEAR=2021 URL=https://www.frontiersin.org/journals/forests-and-global-change/articles/10.3389/ffgc.2021.678480 DOI=10.3389/ffgc.2021.678480 ISSN=2624-893X ABSTRACT=

Litter decomposition is a key process for carbon and nutrient cycling in terrestrial ecosystems and is mainly controlled by environmental conditions, substrate quantity and quality as well as microbial community abundance and composition. In particular, the effects of climate and atmospheric nitrogen (N) deposition on litter decomposition and its temporal dynamics are of significant importance, since their effects might change over the course of the decomposition process. Within the TeaComposition initiative, we incubated Green and Rooibos teas at 524 sites across nine biomes. We assessed how macroclimate and atmospheric inorganic N deposition under current and predicted scenarios (RCP 2.6, RCP 8.5) might affect litter mass loss measured after 3 and 12 months. Our study shows that the early to mid-term mass loss at the global scale was affected predominantly by litter quality (explaining 73% and 62% of the total variance after 3 and 12 months, respectively) followed by climate and N deposition. The effects of climate were not litter-specific and became increasingly significant as decomposition progressed, with MAP explaining 2% and MAT 4% of the variation after 12 months of incubation. The effect of N deposition was litter-specific, and significant only for 12-month decomposition of Rooibos tea at the global scale. However, in the temperate biome where atmospheric N deposition rates are relatively high, the 12-month mass loss of Green and Rooibos teas decreased significantly with increasing N deposition, explaining 9.5% and 1.1% of the variance, respectively. The expected changes in macroclimate and N deposition at the global scale by the end of this century are estimated to increase the 12-month mass loss of easily decomposable litter by 1.1–3.5% and of the more stable substrates by 3.8–10.6%, relative to current mass loss. In contrast, expected changes in atmospheric N deposition will decrease the mid-term mass loss of high-quality litter by 1.4–2.2% and that of low-quality litter by 0.9–1.5% in the temperate biome. Our results suggest that projected increases in N deposition may have the capacity to dampen the climate-driven increases in litter decomposition depending on the biome and decomposition stage of substrate.