Climate Effects on Belowground Tea Litter Decomposition Depend on Ecosystem and Organic Matter Types in Global Wetlands
2024
Trevathan-Tackett, Stacey M. | Kepfer-Rojas, Sebastian | Malerba, Martino | Macreadie, Peter I. | Djukic, Ika | Zhao, Junbin | Young, Erica B. | York, Paul H. | Yeh, Shin-Cheng | Xiong, Yanmei | Winters, Gidon | Campus, Eilat | Whitlock, Danielle | Weaver, Carolyn A. | Watson, Anne | Visby, Inger | Tylkowski, Jacek | Trethowan, Allison | Tiegs, Scott | Taylor, Ben | Szpikowski, Jozef | Szpikowska, Grazyna | Strickland, Victoria L. | Stivrins, Normunds | Sousa, Ana I. | Sinutok, Sutinee | Scheffel, Whitney A. | Santos, Rui | Sanderman, Jonathan | Sánchez-Carrillo, Salvador | Sanchez-Cabeza, Joan-Albert | Rymer, Krzysztof G. | Ruiz-Fernandez, Ana Carolina | Robroek, Bjorn J. M. | Roberts, Tessa | Ricart, Aurora M. | Reynolds, Laura K. | Rachlewicz, Grzegorz | Prathep, Anchana | Pinsonneault, Andrew J. | Pendall, Elise | Payne, Richard J. | Ozola, Ilze | Onufrock, Cody | Ola, Anne | Oberbauer, Steven F. | Numbere, Aroloye O. | Novak, Alyssa B. | Norkko, Joanna | Norkko, Alf | Mozdzer, Thomas J. | Morgan, Pam | Montemayor, Diana I. | Martin, Charles W. | Malone, Sparkle L. | Major, Maciej | Majewski, Mikolaj | Lundquist, Carolyn J. | Lovelock, Catherine E. | Liu, Songlin | Lin, Hsing-Juh | Lillebo, Ana | Li, Jinquan | Kominoski, John S. | Khuroo, Anzar Ahmad | Kelleway, Jeffrey J. | Jinks, Kristin I. | Jerónimo, Daniel | Janousek, Christopher | Jackson, Emma L. | Iribarne, Oscar | Hanley, Torrance | Hamid, Maroof | Gupta, Arjun | Guariento, Rafael D. | Grudzinska, Ieva | Gripp, Anderson da Rocha | González Sagrario, María A. | Garrison, Laura M. | Gagnon, Karine | Gacia, Esperança | Fusi, Marco | Farrington, Lachlan | Farmer, Jenny | de Assis Esteves, Francisco | Escapa, Mauricio | Domańska, Monika | Dias, André T. C. | de los Santos, Carmen B. | Daffonchio, Daniele | Czyryca, Pawel M. | Connolly, Rod M. | Cobb, Alexander | Chudzińska, Maria | Christiaen, Bart | Chifflard, Peter | Castelar, Sara | Carneiro, Luciana S. | Cardoso-Mohedano, José Gilberto | Camden, Megan | Caliman, Adriano | Bulmer, Richard H. | Bowen, Jennifer | Boström, Christoffer | Bernal, Susana | Berges, John A. | Benavides, Juan C. | Barry, Savanna C. | Alatalo, Juha M. | Al-Haj, Alia N. | Adame, Maria Fernanda
Patchy global data on belowground litter decomposition dynamics limit our capacity to discern the drivers of carbon preservation and storage across inland and coastal wetlands. We performed a global, multiyear study in over 180 wetlands across 28 countries and 8 macroclimates using standardized litter as measures of “recalcitrant” (rooibos tea) and “labile” (green tea) organic matter (OM) decomposition. Freshwater wetlands and tidal marshes had the highest tea mass remaining, indicating a greater potential for carbon preservation in these ecosystems. Recalcitrant OM decomposition increased with elevated temperatures throughout the decay period, e.g., increase from 10 to 20 °C corresponded to a 1.46-fold increase in the recalcitrant OM decay rate constant. The effect of elevated temperature on labile OM breakdown was ecosystem-dependent, with tidally influenced wetlands showing limited effects of temperature compared with freshwater wetlands. Based on climatic projections, by 2050 wetland decay constants will increase by 1.8% for labile and 3.1% for recalcitrant OM. Our study highlights the potential for reduction in belowground OM in coastal and inland wetlands under increased warming, but the extent and direction of this effect at a large scale is dependent on ecosystem and OM characteristics. Understanding local versus global drivers is necessary to resolve ecosystem influences on carbon preservation in wetlands.
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