Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river
Summary: The construction of dams to intercept natural rivers constitutes the most severe human activity influencing the underlying surface. This study focuses on four cascade reservoirs of the Lancang River and explores their impact on the migration of organic matter in sediments. The research reve...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004224029080 |
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| author | Yufei Bao Meng Sun Yuchun Wang Ji Lu Yajie Wu Hao Chen Shanze Li Yong Qin Zhuowei Wang Jie Wen Xinghua Wu Zhongjun Wang |
| author_facet | Yufei Bao Meng Sun Yuchun Wang Ji Lu Yajie Wu Hao Chen Shanze Li Yong Qin Zhuowei Wang Jie Wen Xinghua Wu Zhongjun Wang |
| author_sort | Yufei Bao |
| collection | DOAJ |
| description | Summary: The construction of dams to intercept natural rivers constitutes the most severe human activity influencing the underlying surface. This study focuses on four cascade reservoirs of the Lancang River and explores their impact on the migration of organic matter in sediments. The research reveals significant spatial variations in total organic carbon (TOC) and total nitrogen concentrations in the sediments of the four reservoirs. The carbon and nitrogen isotopes indicate that terrigenous organic matter is the main source of TOC in the sediments, contributing an average of 66.80%. Endogenous algal-derived organic matter is the second significant source, contributing between 14.30% and 32.91%. The sources contributed from upstream organic matter are the lowest, ranging from 6.36% to 15.33%. Our study demonstrates that the construction of cascade reservoirs may significantly alter the processes of material sources in the river basin ecosystem, particularly in the large reservoir which increased more endogenous algal-derived organic matter. |
| format | Article |
| id | doaj-art-34a64572d018458eb3346ed9e4028803 |
| institution | Kabale University |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-34a64572d018458eb3346ed9e40288032025-01-11T06:41:49ZengElsevieriScience2589-00422025-01-01281111681Impact of cascade reservoir on the sources of organic matter in sediments of Lancang riverYufei Bao0Meng Sun1Yuchun Wang2Ji Lu3Yajie Wu4Hao Chen5Shanze Li6Yong Qin7Zhuowei Wang8Jie Wen9Xinghua Wu10Zhongjun Wang11State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Ecological Environment Engineering Research Center of the Yangtze River, China Three Gorges Corporation, Beijing 100038, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Corresponding authorTechnology R&D Center, Huaneng Lancang River Hydropower Inc., Kunming 650000, China; Corresponding authorTechnology R&D Center, Huaneng Lancang River Hydropower Inc., Kunming 650000, ChinaTechnology R&D Center, Huaneng Lancang River Hydropower Inc., Kunming 650000, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaEcological Environment Engineering Research Center of the Yangtze River, China Three Gorges Corporation, Beijing 100038, ChinaTechnology R&D Center, Huaneng Lancang River Hydropower Inc., Kunming 650000, ChinaSummary: The construction of dams to intercept natural rivers constitutes the most severe human activity influencing the underlying surface. This study focuses on four cascade reservoirs of the Lancang River and explores their impact on the migration of organic matter in sediments. The research reveals significant spatial variations in total organic carbon (TOC) and total nitrogen concentrations in the sediments of the four reservoirs. The carbon and nitrogen isotopes indicate that terrigenous organic matter is the main source of TOC in the sediments, contributing an average of 66.80%. Endogenous algal-derived organic matter is the second significant source, contributing between 14.30% and 32.91%. The sources contributed from upstream organic matter are the lowest, ranging from 6.36% to 15.33%. Our study demonstrates that the construction of cascade reservoirs may significantly alter the processes of material sources in the river basin ecosystem, particularly in the large reservoir which increased more endogenous algal-derived organic matter.http://www.sciencedirect.com/science/article/pii/S2589004224029080Earth sciencesEarth-surface processesEarth surface sediment transportHydrologySoil hydrology |
| spellingShingle | Yufei Bao Meng Sun Yuchun Wang Ji Lu Yajie Wu Hao Chen Shanze Li Yong Qin Zhuowei Wang Jie Wen Xinghua Wu Zhongjun Wang Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river iScience Earth sciences Earth-surface processes Earth surface sediment transport Hydrology Soil hydrology |
| title | Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river |
| title_full | Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river |
| title_fullStr | Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river |
| title_full_unstemmed | Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river |
| title_short | Impact of cascade reservoir on the sources of organic matter in sediments of Lancang river |
| title_sort | impact of cascade reservoir on the sources of organic matter in sediments of lancang river |
| topic | Earth sciences Earth-surface processes Earth surface sediment transport Hydrology Soil hydrology |
| url | http://www.sciencedirect.com/science/article/pii/S2589004224029080 |
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