Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Zhang, Chao1,2; Wei, Gangjian1 ; Gao, Quanzhou3; Tao, Zhen3
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| Impacts of damming on the biogeochemical cycles of dissolved silicon in a tributary of the Pearl river in South China | |
| Source Publication | JOURNAL OF ASIAN EARTH SCIENCES
 |
| ISSN | 1367-9120 |
| 2023-07-01 | |
| Volume | 250Pages:12 |
| DOI | 10.1016/j.jseaes.2023.105654 |
| Language | 英语 |
| WOS Research Area | Geology |
| Abstract | Damming significantly influences silicon (Si) biogeochemical cycles in river system. Its mechanism, however, is still not clear to date. We here carried out spatial and temporal field observations over a complete hydrological year in the Xinfengjiang Reservoir on a tributary of the Pearl River to explore the influence of the reservoir on the biogeochemical cycles of Dissolved Silicon (DSi) by exploring in different functional zones. The results showed that DSi concentration was temporally and spatially different, showing variable behaviors in different functional zones. In the Riverine zone, the DSi concentration was largely controlled by input from chemical weathering of silicate minerals in the watershed and seasonal changes in precipitation. In the Transition zone, the biological activity of phytoplankton was the key to control the DSi change, especially during the wet season. In the Lacustrine zone, the effect of the 'biological pump' was limited but some other factors influenced the Si and C cycle, such as phytoplankton settlement/re-decomposition, input of terrigenous substances. In the Dammed zone, the spatial distribution of DSi concentrations was significantly influenced by water regulation of the reservoir. Based on these observations, the DSi interception efficiency of the Xinfengjiang Reservoir was estimated to be about 40.5% and 16.3% when selecting Up-Dammed zone and Down-Dammed zone as output endmember, respectively, over a complete hydrological year. Such DSi sink significance was mainly contributed from the Riverine zone during the wet season. Our studies benefit the understanding of the spatial and temporal het-erogenic effects on DSi biogeochemical cycles in a reservoir. |
| Keyword | Dissolved Silicon Silicon Biogeochemical cycle Functional zones Retention Xinfengjiang Reservoir |
| WOS ID | WOS:000977113400001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74164 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Wei, Gangjian |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Sun Yat Sen Univ, Sch Geog & Planning, Guangdong Key Lab Urbanizat & Geosimulat, Guangzhou 510275, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Chao,Wei, Gangjian,Gao, Quanzhou,et al. Impacts of damming on the biogeochemical cycles of dissolved silicon in a tributary of the Pearl river in South China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,250:12. |
| APA | Zhang, Chao,Wei, Gangjian,Gao, Quanzhou,&Tao, Zhen.(2023).Impacts of damming on the biogeochemical cycles of dissolved silicon in a tributary of the Pearl river in South China.JOURNAL OF ASIAN EARTH SCIENCES,250,12. |
| MLA | Zhang, Chao,et al."Impacts of damming on the biogeochemical cycles of dissolved silicon in a tributary of the Pearl river in South China".JOURNAL OF ASIAN EARTH SCIENCES 250(2023):12. |
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