Exchangeable manganese regulates carbon storage in the humus layer of the boreal forest

• 成果类型: Article
• 署名作者: Zhang, Yunyu; Hobbiec, Sarah E.; Schlesinger, William H.; Berg, Bjorn; Sun, Tao; Zhu, Jiaojun
• 署名单位: Chinese Academy of Sciences; Shenyang Institute of Applied Ecology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; University of Minnesota System; University of Minnesota Twin Cities; Duke University; University of Helsinki; Chinese Academy of Sciences
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13058
• DOI: 10.1073/pnas.2318382121
• 发表日期: 2024-03-26
• 关键词: decomposition; litter

摘要

The huge carbon stock in humus layers of the boreal forest plays a critical role in the global carbon cycle. However, there remains uncertainty about the factors that regulate below- ground carbon sequestration in this region. Notably, based on evidence from two independent but complementary methods, we identified that exchangeable manganese is a critical factor regulating carbon accumulation in boreal forests across both regional scales and the entire boreal latitudinal range. Moreover, in a novel fertilization experiment, manganese addition reduced soil carbon stocks, but only after 4 y of additions. Our results highlight an underappreciated mechanism influencing the humus carbon pool of boreal forests.