Reading tea leaves worldwide: Decoupled drivers of initial litter decomposition mass-loss rate and stabilization

Judith M. Sarneel*, Mariet M. Hefting, Taru Sanden, Johan van den Hoogen, Devin Routh, Bhupendra S. Adhikari, Juha M. Alatalo, Alla Aleksanyan, Inge H. J. Althuizen, Mohammed H. S. A. Alsafran, Jeff W. Atkins, Laurent Augusto, Mika Aurela, Aleksej V. Azarov, Isabel C. Barrio, Claus Beier, Maria D. Bejarano, Sue E. Benham, Bjorn Berg, Nadezhda V. BezlerKatrin Bjornsdottir, Martin A. Bolinder, Michele Carbognani, Roberto Cazzolla Gatti, Stefano Chelli, Maxim V. Chistotin, Casper T. Christiansen, Pascal Courtois, Thomas W. Crowther, Michele S. Dechoum, Ika Djukic, Sarah Duddigan, Louise M. Egerton-Warburton, Nicolas Fanin, Maria Fantappie, Silvano Fares, Geraldo W. Fernandes, Nina V. Filippova, Andreas Fliessbach, David Fuentes, Roberto Godoy, Thomas Gruenwald, Gema Guzman, Joseph E. Hawes, Yue He, Jean-Marc Hero, Laura L. Hess, Katja Hogendoorn, Toke T. Hoye, Wilma W. P. Jans, Ingibjoerg S. Jonsdottir, Sabina Keller, Sebastian Kepfer-Rojas, Natalya N. Kuz'menko, Klaus S. Larsen, Hjalmar Laudon, Jonas J. Lembrechts, Junhui Li, Jean-Marc Limousin, Sergey M. Lukin, Renato Marques, Cesar Marin, Marshall D. McDaniel, Qi Meek, Genrietta E. Merzlaya, Anders Michelsen, Leonardo Montagnani, Peter Mueller, Rajasekaran Murugan, Isla H. Myers-Smith, Stefanie Nolte, Raul Ochoa-Hueso, Bernard N. Okafor, Vladimir V. Okorkov, Vladimir G. Onipchenko, Maria C. Orozco, Tina Parkhurst, Carlos A. Peres, Matteo Petit Bon, Alessandro Petraglia, Martin Pingel, Corinna Rebmann, Brett R. Scheffers, Inger Schmidt, Mary C. Scholes, Efrat Sheffer, Lyudmila K. Shevtsova, Stuart W. Smith, Adriano Sofo, Pablo R. Stevenson, Barbora Strouhalova, Anders Sundsdal, Rafael B. Suehs, Gebretsadik Tamene, Haydn J. D. Thomas, Duygu Tolunay, Marcello Tomaselli, Simon Tresch, Dominique L. Tucker, Michael D. Ulyshen, Alejandro Valdecantos, Vigdis Vandvik, Elena I. Vanguelova, Kris Verheyen, Xuhui Wang, Laura Yahdjian, Xaris S. Yumashev, Joost A. Keuskamp

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The breakdown of plant material fuels soil functioning and biodiversity. Currently, process understanding of global decomposition patterns and the drivers of such patterns are hampered by the lack of coherent large-scale datasets. We buried 36,000 individual litterbags (tea bags) worldwide and found an overall negative correlation between initial mass-loss rates and stabilization factors of plant-derived carbon, using the Tea Bag Index (TBI). The stabilization factor quantifies the degree to which easy-to-degrade components accumulate during early-stage decomposition (e.g. by environmental limitations). However, agriculture and an interaction between moisture and temperature led to a decoupling between initial mass-loss rates and stabilization, notably in colder locations. Using TBI improved mass-loss estimates of natural litter compared to models that ignored stabilization. Ignoring the transformation of dead plant material to more recalcitrant substances during early-stage decomposition, and the environmental control of this transformation, could overestimate carbon losses during early decomposition in carbon cycle models.
Original languageEnglish
Article numbere14415
Number of pages14
JournalEcology Letters
Volume27
Issue number5
DOIs
Publication statusPublished - May 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. Ecology Letters published by John Wiley & Sons Ltd.

Funding

A full list of acknowledgements is provided on www.teabagindex.org/connect. Funding is acknowledged in Table\u00A0S11. We further acknowledge, M. Abdulkareem, K. Anantanawat, S. Angers-Blondin, J. Assmann, J. \u00C1vila, A. Bejarano, M. Bejarano, H. Berthold, S. Bezaud, J. Boyle, Y.K. Bredin, L. Burrows, H. B\u00F6hner, H. B\u00F6hner, J.M. Cabezas, Y. Calla Choque, J.A. Carnerero, M.D. Carri\u00F3n, R. Carri\u00F3n, S. Cecchini, A. Conte, C. Cosgrove, L. Dienstbach, I.A. do Carmo, M.F.A. do Carmo, S. Doumbia, T.G. Elumeeva, G. Fayvush, A. F\u00F6ger, N. Gallegos, A. Garc\u00EDa, I. Garcia Quiros, J. Garc\u00EDa-Bermejo, G. G\u00EDslad\u00F3ttir, J. Godlee, J.A. G\u00F3mez, R.V. Gondim, S. Hamad, Hamilton, O.L.P. Hansen, M. Hehn, A.-N. Hejkoop, R. Henry, S. Henry, E. Herberg, A. Hochmuth, C. Klausbruchner, S. Letonen, M. Little, G. Lollback, O. Lyster, A. McConnell, T. Middleton, P. Miguel, P. Moreno, V. Moretti, M. Nicolas, L. Nkhoma, J.-M. Ourcival, K. Peck, F. Polo, H. Prasse, J. Quispe Torres, I. Rich, T. Schwach, K. Seper, S. Serikova, M.R. Silman, A. Sordo-Ward, T. Sorgi, C. Spann, H. Spiegel, A. Szumelda, J. Tiwari, M. Toleikiene, G.F. Veen, E. Walker, M. Yazdani, I. Ying Chen, O. \u00C5kesson, The Soil Erosion Laboratory Team (IAS-CSIC), TeaComposition initiative (teacomposition.org), funded at the site-scale by individual researchers and sponsored with tea bags by UNILEVER, D.O.P. Montilla-Moriles winegrowers, staff and farmers at Practical Farmers of Iowa, Citizen science participants in Zurich, UK, within the Tep\u00E5sef\u00F6rs\u00F6ket (Sweden), Citizen Science Award 2016 (Austria) and the consortia of the tundra tea bag experiment and the tidal wetland study for practical help, fieldwork and data contribution. We also thank C. Collins, T. K\u00E4tterer, F. Broun\u00E9us, L. Shaw and P. Alexander for supervision and intellectual input, H. B\u00F6hner, A. Hochmuth, H. Spiegel, T. Schwach, K. Seper, A. F\u00F6ger and The French National Office for Forests (ONF), the Inuvialuit, Kluane First Nation and SITES and ICOS Sweden are acknowledged for providing site management and access to field sites. We would hereby like to acknowledge that some fieldwork can have been conducted on lands that have been or are currently partly belonging to Indigenous peoples that were there before country borders were created.

FundersFunder number
Soil Erosion Laboratory Team
French National Office for Forests
Oncology Nursing Foundation
Unilever
Citizen Science Award 2016

    Keywords

    • citizen science
    • environmental drivers
    • global change
    • litter decomposition
    • mass loss
    • soil organic matter formation
    • stabilization
    • tea bag index

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