Early stage litter decomposition across biomes

  • Authors: Djukic, Ika; Kepfer-Rojas, Sebastian; Schmidt, Inger Kappel; Larsen, Klaus Steenberg; Beier, Claus; Berg, Björn; Verheyen, Kris; Caliman, Adriano; Paquette, Alain; Gutiérrez-Girón, Alba; Humber, Alberto; Valdecantos, Alejandro; Petraglia, Alessandro; Alexander, Heather; Augustaitis, Algirdas; Saillard, Amélie; Fernández, Ana Carolina Ruiz; Sousa, Ana I.; Lillebø, Ana I.; da Rocha Gripp, Anderson; Francez, André-Jean; Fischer, Andrea; Bohner, Andreas; Malyshev, Andrey; Andrić, Andrijana; Smith, Andy; Stanisci, Angela; Seres, Anikó; Schmidt, Anja; Avila, Anna; Probst, Anne; Ouin, Annie; Khuroo, Anzar A.; Verstraeten, Arne; Palabral-Aguilera, Arely N.; Stefanski, Artur; Gaxiola, Aurora; Muys, Bart; Bosman, Bernard; Ahrends, Bernd; Parker, Bill; Sattler, Birgit; Yang, Bo; Juráni, Bohdan; Erschbamer, Brigitta; Ortiz, Carmen Eugenia Rodriguez; Christiansen, Casper T.; Carol Adair, E.; Meredieu, Céline; Mony, Cendrine; Nock, Charles A.; Chen, Chi-Ling; Wang, Chiao-Ping; Baum, Christel; Rixen, Christian; Delire, Christine; Piscart, Christophe; Andrews, Christopher; Rebmann, Corinna; Branquinho, Cristina; Polyanskaya, Dana; Delgado, David Fuentes; Wundram, Dirk; Radeideh, Diyaa; Ordóñez-Regil, Eduardo; Crawford, Edward; Preda, Elena; Tropina, Elena; Groner, Elli; Lucot, Eric; Hornung, Erzsébet; Gacia, Esperança; Lévesque, Esther; Benedito, Evanilde; Davydov, Evgeny A.; Ampoorter, Evy; Bolzan, Fabio Padilha; Varela, Felipe; Kristöfel, Ferdinand; Maestre, Fernando T.; Maunoury-Danger, Florence; Hofhansl, Florian; Kitz, Florian; Sutter, Flurin; Cuesta, Francisco; de Almeida Lobo, Francisco; de Souza, Franco Leandro; Berninger, Frank; Zehetner, Franz; Wohlfahrt, Georg; Vourlitis, George; Carreño-Rocabado, Geovana; Arena, Gina; Pinha, Gisele Daiane; González, Grizelle; Additional, Authors; Yesilonis, Ian; Additional, Authors; Rustad, Lindsey; et, al.
  • Publication Year: 2018
  • Publication Series: Scientific Journal (JRNL)
  • Source: Science of The Total Environment
  • DOI: 10.1016/j.scitotenv.2018.01.012

Abstract

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 metaanalyses 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 3113mm 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 b0.5% 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 decompositionwas notedwithin the temperate biome. Our results indicate that multiple drivers are affecting early stage littermass 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.

  • Citation: Djukic, Ika; Kepfer-Rojas, Sebastian; Schmidt, Inger Kappel; Larsen, Klaus Steenberg; Beier, Claus; Berg, Björn; Verheyen, Kris, et al. 2018. Early stage litter decomposition across biomes. Science of The Total Environment. 628-629: 1369-1394. https://doi.org/10.1016/j.scitotenv.2018.01.012.
  • Keywords: Tea bag, Green tea, Rooibos tea, Carbon turnover, TeaComposition initiative
  • Posted Date: March 14, 2018
  • Modified Date: September 25, 2018
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    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
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