全球旱地与矿物相关的土壤有机碳对气候的脆弱性

IF 29.6 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Nature Climate Change Pub Date : 2024-07-30 DOI:10.1038/s41558-024-02087-y
Paloma Díaz-Martínez, Fernando T. Maestre, Eduardo Moreno-Jiménez, Manuel Delgado-Baquerizo, David J. Eldridge, Hugo Saiz, Nicolas Gross, Yoann Le Bagousse-Pinguet, Beatriz Gozalo, Victoria Ochoa, Emilio Guirado, Miguel García-Gómez, Enrique Valencia, Sergio Asensio, Miguel Berdugo, Jaime Martínez-Valderrama, Betty J. Mendoza, Juan C. García-Gil, Claudio Zaccone, Marco Panettieri, Pablo García-Palacios, Wei Fan, Iria Benavente-Ferraces, Ana Rey, Nico Eisenhauer, Simone Cesarz, Mehdi Abedi, Rodrigo J. Ahumada, Julio M. Alcántara, Fateh Amghar, Valeria Aramayo, Antonio I. Arroyo, Khadijeh Bahalkeh, Farah Ben Salem, Niels Blaum, Bazartseren Boldgiv, Matthew A. Bowker, Donaldo Bran, Cristina Branquinho, Chongfeng Bu, Yonatan Cáceres, Rafaella Canessa, Andrea P. Castillo-Monroy, Ignacio Castro, Patricio Castro-Quezada, Roukaya Chibani, Abel A. Conceição, Courtney M. Currier, Anthony Darrouzet-Nardi, Balázs Deák, Christopher R. Dickman, David A. Donoso, Andrew J. Dougill, Jorge Durán, Hamid Ejtehadi, Carlos Espinosa, Alex Fajardo, Mohammad Farzam, Daniela Ferrante, Lauchlan H. Fraser, Juan J. Gaitán, Elizabeth Gusman Montalván, Rosa M. Hernández-Hernández, Andreas von Hessberg, Norbert Hölzel, Elisabeth Huber-Sannwald, Frederic M. Hughes, Oswaldo Jadán-Maza, Katja Geissler, Anke Jentsch, Mengchen Ju, Kudzai F. Kaseke, Liana Kindermann, Jessica E. Koopman, Peter C. Le Roux, Pierre Liancourt, Anja Linstädter, Jushan Liu, Michelle A. Louw, Gillian Maggs-Kölling, Thulani P. Makhalanyane, Oumarou Malam Issa, Eugene Marais, Pierre Margerie, Antonio J. Mazaneda, Mitchel P. McClaran, João Vitor S. Messeder, Juan P. Mora, Gerardo Moreno, Seth M. Munson, Alice Nunes, Gabriel Oliva, Gastón R. Oñatibia, Brooke Osborne, Guadalupe Peter, Yolanda Pueyo, R. Emiliano Quiroga, Sasha C. Reed, Victor M. Reyes, Alexandra Rodríguez, Jan C. Ruppert, Osvaldo Sala, Ayman Salah, Julius Sebei, Michael Sloan, Shijirbaatar Solongo, Ilan Stavi, Colton R. A. Stephens, Alberto L. Teixido, Andrew D. Thomas, Heather L. Throop, Katja Tielbörger, Samantha Travers, James Val, Orsolya Valko, Liesbeth van den Brink, Frederike Velbert, Wanyoike Wamiti, Deli Wang, Lixin Wang, Glenda M. Wardle, Laura Yahdjian, Eli Zaady, Juan M. Zeberio, Yuanming Zhang, Xiaobing Zhou, César Plaza
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引用次数: 0

摘要

矿物相关有机碳(MAOC)是全球土壤碳的主要组成部分,由于受到矿物的保护,它对气候的敏感性被认为不如颗粒有机碳(POC)。尽管 MAOC 对长期碳储存非常重要,但在占全球陆地面积 40% 以上的干旱地区,MAOC 对气候变化的响应仍未得到研究。在此,我们对全球 6 大洲 25 个国家的 326 个地块进行了标准化实地调查,评估了全球旱地的表土有机碳组分。我们发现,土壤生物地球化学解释了 MAOC 和 POC 的大部分变化。随着年平均气温的升高和降水量的减少,这两种碳组分都会减少,其中 MAOC 与 POC 的反应类似。因此,我们的研究结果表明,持续的气候变暖和干旱化可能会导致全球旱地出现不可预见的碳损失,而矿物质的保护作用可能无法抑制这些影响。
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Vulnerability of mineral-associated soil organic carbon to climate across global drylands
Mineral-associated organic carbon (MAOC) constitutes a major fraction of global soil carbon and is assumed less sensitive to climate than particulate organic carbon (POC) due to protection by minerals. Despite its importance for long-term carbon storage, the response of MAOC to changing climates in drylands, which cover more than 40% of the global land area, remains unexplored. Here we assess topsoil organic carbon fractions across global drylands using a standardized field survey in 326 plots from 25 countries and 6 continents. We find that soil biogeochemistry explained the majority of variation in both MAOC and POC. Both carbon fractions decreased with increases in mean annual temperature and reductions in precipitation, with MAOC responding similarly to POC. Therefore, our results suggest that ongoing climate warming and aridification may result in unforeseen carbon losses across global drylands, and that the protective role of minerals may not dampen these effects. Protection afforded by inorganic minerals is assumed to make mineral-associated organic carbon less susceptible to loss under climate change than particulate organic carbon. However, a global study of soil organic carbon from drylands suggests that this is not the case.
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来源期刊
Nature Climate Change
Nature Climate Change ENVIRONMENTAL SCIENCES-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
40.30
自引率
1.60%
发文量
267
审稿时长
4-8 weeks
期刊介绍: Nature Climate Change is dedicated to addressing the scientific challenge of understanding Earth's changing climate and its societal implications. As a monthly journal, it publishes significant and cutting-edge research on the nature, causes, and impacts of global climate change, as well as its implications for the economy, policy, and the world at large. The journal publishes original research spanning the natural and social sciences, synthesizing interdisciplinary research to provide a comprehensive understanding of climate change. It upholds the high standards set by all Nature-branded journals, ensuring top-tier original research through a fair and rigorous review process, broad readership access, high standards of copy editing and production, rapid publication, and independence from academic societies and other vested interests. Nature Climate Change serves as a platform for discussion among experts, publishing opinion, analysis, and review articles. It also features Research Highlights to highlight important developments in the field and original reporting from renowned science journalists in the form of feature articles. Topics covered in the journal include adaptation, atmospheric science, ecology, economics, energy, impacts and vulnerability, mitigation, oceanography, policy, sociology, and sustainability, among others.
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