Effect of experimental warming on dissolved organic matter and bacterial diversity in a forest swamp soil

Autor: Liyuan Zhao, Jianwei Li, Naixu Tian, Gaoxiang Li, Lianxi Sheng, Chunguang He, Hongfeng Bian
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Ecological Indicators, Vol 158, Iss , Pp 111375- (2024)
Druh dokumentu: article
ISSN: 1470-160X
DOI: 10.1016/j.ecolind.2023.111375
Popis: Forest swamp ecosystems play an important role in the global carbon cycle, yet they are often overlooked. With global climate warming, it is inevitable that it will impact the relationship between soil microorganisms and organic matter. Dissolved organic matter (DOM) in the soil environment is extremely sensitive to environmental changes. Understanding the effects of climate change on DOM and microorganisms is crucial for assessing the stability of carbon (C) in forest swamp soils. Therefore, we conducted a 142-day laboratory warming incubation experiment (control: 10 °C, and warming: 20 °C) to investigate the response of forest swamp soil microbial and DOM properties to warming. Excitation-emission matrix (EEM) fluorescence spectroscopy was used to explore the changes in different material compositions of DOM over time at different incubation temperatures, and high-throughput sequencing was used to investigate the changes in soil bacteria. The DOM content (dissolved organic C, DOC) and the degree of humification index (HIX) increased with an increase in incubation time under warming conditions (p
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