Global patterns and driving factors of plant litter iron, manganese, zinc, and copper concentrations

生物地球化学循环 环境化学 自行车 植物凋落物 垃圾箱 微量元素 化学 非生物成分 微量金属 环境科学 生态学 营养物 金属 生物 历史 考古 有机化学
作者
Yan Peng,Dario Fornara,Qiqian Wu,Petr Heděnec,Ji Yuan,Chaoxiang Yuan,Kai Yue,Fuzhong Wu
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:857: 159686-159686 被引量:14
标识
DOI:10.1016/j.scitotenv.2022.159686
摘要

Plant litter decomposition is not only the major source of soil carbon and macronutrients, but also an important process for the biogeochemical cycling of trace elements such as iron (Fe), manganese (Mn), zinc (Zn), and copper (Cu). The concentrations of plant litter trace elements can influence litter decomposition and element cycling across the plant and soil systems. Yet, a global perspective of the patterns and driving factors of trace elements in plant litter is missing. To bridge this knowledge gap, we quantitatively assessed the concentrations of four common trace elements, namely Fe, Mn, Zn, and Cu, of freshly fallen plant litter with 1411 observations extracted from 175 publications across the globe. Results showed that (1) the median of the average concentrations of litter Fe, Mn, Zn, and Cu were 0.200, 0.555, 0.032, and 0.006 g/kg, respectively, across litter types; (2) litter concentrations of Fe, Zn, and Cu were generally stable regardless of variations in multiple biotic and abiotic factors (e.g., plant taxonomy, climate, and soil properties); and (3) litter Mn concentration was more sensitive to environmental conditions and influenced by multiple factors, but mycorrhizal association and soil pH and nitrogen concentration were the most important ones. Overall, our study provides a clear global picture of plant litter Fe, Mn, Zn, and Cu concentrations and their driving factors, which is important for improving our understanding on their biogeochemical cycling along with litter decomposition processes.
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