Algal blooms modulate organic matter remineralization in freshwater sediments: A new insight on priming effect
文献类型：期刊论文
| 作者 | Wang, Yarui; Feng, Muhua; Wang, Jianjun; Chen, Xinfang; Chen, Xiangchao; Du, Xian; Xun, Fan; Ngwenya, Bryne Tendelo |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-08-25 |
| 卷号 | 784页码:- |
| 关键词 | Algal debris accumulation SOM mineralization End products Endogenous contribution Priming effect |
| ISSN号 | 0048-9697 |
| 英文摘要 | This study provides a novel insight into the degradation of sediment organic matter (SOM) regulated by algae-derived organic matter (AOM) based on priming effect. We tracked the dynamics of SOM mineralization products and pathways, together with priming effects (PE) using the compound-specific stable isotope (delta C-13) technique following addition of low- and high-density algal debris in sediments. We found that algal debris increased the total carbon oxidation rate, and resulted in denitrification and methanogenesis-dominated SOM mineralization. While iron reduction and sulphate reduction played important roles in the early period of algal accumulation. Total carbon oxidation rate and anaerobic rates (R-anaerobic) were higher in the amended treatments compared with that in the control. Analysis indicated that algal debris had a positive PE on SOM mineralization, which caused an intensified mineralization in the initial phase with over 80% of dissolved inorganic carbon deriving from SOM degradation. Total carbon oxidation rate of SOM deduced from priming effect (RTCOR-PE) was similar to R-anaerobic, further indicating SOM mineralization was a critical source of the end products. These findings deviate the causal focus from the decomposition of AOM, and confirm the accumulation of AOM as the facilitator of SOM mineralization. Our study offers empirical evidences to advance the traditional view on the effect of AOM on SOM mineralization. (C) 2021 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45653]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Univ Edinburgh, Sch Geosci, Microbial Geochem Lab, Edinburgh, Midlothian, Scotland 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, 73 Beijing East Rd, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, 18 Shuangqing Rd, Beijing 100085, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Hohai Univ, Hydrol & Water Resources Coll, Nanjing 210098, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yarui,Feng, Muhua,Wang, Jianjun,et al. Algal blooms modulate organic matter remineralization in freshwater sediments: A new insight on priming effect[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,784:-. |
| APA | Wang, Yarui.,Feng, Muhua.,Wang, Jianjun.,Chen, Xinfang.,Chen, Xiangchao.,...&Ngwenya, Bryne Tendelo.(2021).Algal blooms modulate organic matter remineralization in freshwater sediments: A new insight on priming effect.SCIENCE OF THE TOTAL ENVIRONMENT,784,-. |
| MLA | Wang, Yarui,et al."Algal blooms modulate organic matter remineralization in freshwater sediments: A new insight on priming effect".SCIENCE OF THE TOTAL ENVIRONMENT 784(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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