Variation of biogeochemical cycle of riverine dissolved inorganic carbon and silicon with the cascade damming

To investigate the variation of the biogeochemical cycle of riverine dissolved inorganic carbon (DIC) and silicon (DSi) with the cascade damming, the bicarbonate ( HCO 3 − ), dissolved silicon (DSi), and other environmental factors within the cascade reservoirs of the lower reaches of Yalongjiang Ri...

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Veröffentlicht in:Environmental science and pollution research international 2020-08, Vol.27 (23), p.28840-28852
Hauptverfasser: Deng, Haojun, Tao, Zhen, Gao, Quanzhou, Yao, Ling, Feng, Yong, Li, Yinhua, Ding, Jian, Wang, Zhengang, Lyu, Xiaoxi, Xu, Peng
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container_issue 23
container_start_page 28840
container_title Environmental science and pollution research international
container_volume 27
creator Deng, Haojun
Tao, Zhen
Gao, Quanzhou
Yao, Ling
Feng, Yong
Li, Yinhua
Ding, Jian
Wang, Zhengang
Lyu, Xiaoxi
Xu, Peng
description To investigate the variation of the biogeochemical cycle of riverine dissolved inorganic carbon (DIC) and silicon (DSi) with the cascade damming, the bicarbonate ( HCO 3 − ), dissolved silicon (DSi), and other environmental factors within the cascade reservoirs of the lower reaches of Yalongjiang River, passing through the southeastern Qinghai-Tibet Plateau, were systematically analyzed by collecting water samples during the wet season and dry season from 2018 to 2019, respectively. The results showed that the lower ratio of DSi to HCO 3 – (0.044 ± 0.001) was mainly controlled by the domination of carbonate mineral in the sedimentary rock of the Yalongjiang River drainage basin. The DSi: HCO 3 – ratio was positively correlated with discharge ( P  
doi_str_mv 10.1007/s11356-020-09174-5
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The results showed that the lower ratio of DSi to HCO 3 – (0.044 ± 0.001) was mainly controlled by the domination of carbonate mineral in the sedimentary rock of the Yalongjiang River drainage basin. The DSi: HCO 3 – ratio was positively correlated with discharge ( P  &lt; 0.05), and negatively correlated with the water retention time ( P  &lt; 0.01) and chlorophyll a, implying that the variations of DSi: HCO 3 – ratio were mainly determined by the rock chemical weathering processes and the hydrologic process outside the reservoirs and the biological processes within the cascade reservoirs. The phytoplankton photosynthetic process stoichiometrically assimilated DSi and HCO 3 – , resulted in 3.46 × 10 4  t·Si a −1 and 1.89 × 10 4  t·C a −1 sequestering in the cascade reservoirs, respectively. Compared with the situation of dam-free in the lower reaches of Yalongjiang River, the export flux of HCO 3 − and DSi at the mouth of Yalongjiang River was reduced by 11.87% and 62.50%, respectively; the ratio of DSi: HCO 3 – decreased by 36.01% for only building the Ertan dam and 53.15% for the cascade damming, respectively. The water renewal time prolonged from 45 to 126.6 days due to the regulation of the cascade reservoirs in the mainstream. Ultimately, a conceptual model on migration-transformation of DIC and DSi within the cascade reservoirs in the lower reaches of Yalongjiang River was established. These findings demonstrated that riverine cascade damming could extend the biogeochemical coupling cycle of DIC and DSi within the inland aquatic ecosystems and ensure the ecological environment security in the hot-dry valley.</description><identifier>ISSN: 0944-1344</identifier><identifier>EISSN: 1614-7499</identifier><identifier>DOI: 10.1007/s11356-020-09174-5</identifier><identifier>PMID: 32418099</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Aquatic ecosystems ; Aquatic Pollution ; Atmospheric Protection/Air Quality Control/Air Pollution ; Bicarbonates ; Biogeochemical cycles ; Biogeochemistry ; Biological activity ; Carbon ; Chlorophyll ; Dam construction ; Dams ; Dissolved inorganic carbon ; Drainage basins ; Dry season ; Earth and Environmental Science ; Ecotoxicology ; Environment ; Environmental Chemistry ; Environmental factors ; Environmental Health ; Environmental science ; Hydrology ; Photosynthesis ; Phytoplankton ; Rainy season ; Research Article ; Reservoirs ; Retention time ; River basins ; Rivers ; Sedimentary rocks ; Sequestering ; Silicon ; Variation ; Waste Water Technology ; Water analysis ; Water Management ; Water Pollution Control ; Water sampling</subject><ispartof>Environmental science and pollution research international, 2020-08, Vol.27 (23), p.28840-28852</ispartof><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020</rights><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c412t-4d0969686b652fdaf3d4be17d10a80ad804852facb44d7473478651db74c69123</citedby><cites>FETCH-LOGICAL-c412t-4d0969686b652fdaf3d4be17d10a80ad804852facb44d7473478651db74c69123</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11356-020-09174-5$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11356-020-09174-5$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32418099$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Deng, Haojun</creatorcontrib><creatorcontrib>Tao, Zhen</creatorcontrib><creatorcontrib>Gao, Quanzhou</creatorcontrib><creatorcontrib>Yao, Ling</creatorcontrib><creatorcontrib>Feng, Yong</creatorcontrib><creatorcontrib>Li, Yinhua</creatorcontrib><creatorcontrib>Ding, Jian</creatorcontrib><creatorcontrib>Wang, Zhengang</creatorcontrib><creatorcontrib>Lyu, Xiaoxi</creatorcontrib><creatorcontrib>Xu, Peng</creatorcontrib><title>Variation of biogeochemical cycle of riverine dissolved inorganic carbon and silicon with the cascade damming</title><title>Environmental science and pollution research international</title><addtitle>Environ Sci Pollut Res</addtitle><addtitle>Environ Sci Pollut Res Int</addtitle><description>To investigate the variation of the biogeochemical cycle of riverine dissolved inorganic carbon (DIC) and silicon (DSi) with the cascade damming, the bicarbonate ( HCO 3 − ), dissolved silicon (DSi), and other environmental factors within the cascade reservoirs of the lower reaches of Yalongjiang River, passing through the southeastern Qinghai-Tibet Plateau, were systematically analyzed by collecting water samples during the wet season and dry season from 2018 to 2019, respectively. The results showed that the lower ratio of DSi to HCO 3 – (0.044 ± 0.001) was mainly controlled by the domination of carbonate mineral in the sedimentary rock of the Yalongjiang River drainage basin. The DSi: HCO 3 – ratio was positively correlated with discharge ( P  &lt; 0.05), and negatively correlated with the water retention time ( P  &lt; 0.01) and chlorophyll a, implying that the variations of DSi: HCO 3 – ratio were mainly determined by the rock chemical weathering processes and the hydrologic process outside the reservoirs and the biological processes within the cascade reservoirs. The phytoplankton photosynthetic process stoichiometrically assimilated DSi and HCO 3 – , resulted in 3.46 × 10 4  t·Si a −1 and 1.89 × 10 4  t·C a −1 sequestering in the cascade reservoirs, respectively. Compared with the situation of dam-free in the lower reaches of Yalongjiang River, the export flux of HCO 3 − and DSi at the mouth of Yalongjiang River was reduced by 11.87% and 62.50%, respectively; the ratio of DSi: HCO 3 – decreased by 36.01% for only building the Ertan dam and 53.15% for the cascade damming, respectively. The water renewal time prolonged from 45 to 126.6 days due to the regulation of the cascade reservoirs in the mainstream. Ultimately, a conceptual model on migration-transformation of DIC and DSi within the cascade reservoirs in the lower reaches of Yalongjiang River was established. 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The results showed that the lower ratio of DSi to HCO 3 – (0.044 ± 0.001) was mainly controlled by the domination of carbonate mineral in the sedimentary rock of the Yalongjiang River drainage basin. The DSi: HCO 3 – ratio was positively correlated with discharge ( P  &lt; 0.05), and negatively correlated with the water retention time ( P  &lt; 0.01) and chlorophyll a, implying that the variations of DSi: HCO 3 – ratio were mainly determined by the rock chemical weathering processes and the hydrologic process outside the reservoirs and the biological processes within the cascade reservoirs. The phytoplankton photosynthetic process stoichiometrically assimilated DSi and HCO 3 – , resulted in 3.46 × 10 4  t·Si a −1 and 1.89 × 10 4  t·C a −1 sequestering in the cascade reservoirs, respectively. Compared with the situation of dam-free in the lower reaches of Yalongjiang River, the export flux of HCO 3 − and DSi at the mouth of Yalongjiang River was reduced by 11.87% and 62.50%, respectively; the ratio of DSi: HCO 3 – decreased by 36.01% for only building the Ertan dam and 53.15% for the cascade damming, respectively. The water renewal time prolonged from 45 to 126.6 days due to the regulation of the cascade reservoirs in the mainstream. Ultimately, a conceptual model on migration-transformation of DIC and DSi within the cascade reservoirs in the lower reaches of Yalongjiang River was established. These findings demonstrated that riverine cascade damming could extend the biogeochemical coupling cycle of DIC and DSi within the inland aquatic ecosystems and ensure the ecological environment security in the hot-dry valley.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>32418099</pmid><doi>10.1007/s11356-020-09174-5</doi><tpages>13</tpages></addata></record>
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subjects Aquatic ecosystems
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bicarbonates
Biogeochemical cycles
Biogeochemistry
Biological activity
Carbon
Chlorophyll
Dam construction
Dams
Dissolved inorganic carbon
Drainage basins
Dry season
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental factors
Environmental Health
Environmental science
Hydrology
Photosynthesis
Phytoplankton
Rainy season
Research Article
Reservoirs
Retention time
River basins
Rivers
Sedimentary rocks
Sequestering
Silicon
Variation
Waste Water Technology
Water analysis
Water Management
Water Pollution Control
Water sampling
title Variation of biogeochemical cycle of riverine dissolved inorganic carbon and silicon with the cascade damming
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