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- Title
Warming Enhances the Co-Metabolism Effect During the Decomposition of Sediment Organic Carbon in Eutrophic Lakes.
- Authors
Ma, Jie; Lai, Qiuying; He, Fei; Li, Weixin; Li, Zhichun
- Abstract
Warming has been affecting carbon cycling in freshwater ecosystems throughout recent decades. However, how the co-metabolism effect (CE) during the decomposition of sediment organic carbon (SOC) in eutrophic lakes responds to warming remains understudied. A 33-day experiment was conducted to examine the mechanisms that underpin the CE in lacustrine sediments. The results indicated that warming increased the co-metabolism intensity of sedimentary organic matter. At the beginning of the experiment (0–9 d), the co-metabolism intensity increased rapidly at both 25℃ and 35℃. However, at the end of the experiment (33 d), the cumulative co-metabolism intensity was highest at 25℃, which was 33.75% and 153.74% higher than the intensities at 15℃ and 35℃, respectively. By enhancing the co-metabolism intensity of the SOC, warming would weaken lakes "carbon sink" functions. Thus, our study provides novel evidence that microorganisms regulate SOC turnover and effectively maintain a balance between resources and microbial requirements.
- Subjects
LAKES; SEDIMENTS; CARBON cycle; CARBON; ORGANIC compounds
- Publication
Bulletin of Environmental Contamination & Toxicology, 2022, Vol 109, Issue 6, p984
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-022-03608-1