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dc.contributor.author현정호-
dc.date.accessioned2019-12-05T02:06:49Z-
dc.date.available2019-12-05T02:06:49Z-
dc.date.issued2019-11-
dc.identifier.citationSCIENCE OF THE TOTAL ENVIRONMENT, v. 691, Page. 858-867en_US
dc.identifier.issn0048-9697-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0048969719331444-
dc.identifier.urihttp://repository.hanyang.ac.kr/handle/20.500.11754/117400-
dc.description.abstractOccurrence of typhoons accompanied by heavy precipitation has increased for the past 40 years in northeast Asia. To elucidate the impact of three consecutive typhoon-induced heavy rainfall events and resultant freshwater runoff on the partitioning of organic carbon (Corg) oxidation and nutrient dynamics, we investigated the geochemical constituents, the rate of anaerobic Corg oxidation, sulfate reduction (SR), iron reduction (FeR) and P speciation in the intertidal mud flat of the Han River estuary, Yellow Sea. Corg oxidation by SR and FeR and their metabolic products (∑CO2, NH4+, H2S, Fe2+) decreased significantly (P < 0.05) during and immediately after the heavy rainfall. Additional mesocosm experiments demonstrated that potential N2 production rates increased up to 2.4 times with increased nitrate concentrations during freshwater runoff. The results suggest that denitrification becomes a significant Corg oxidation pathway substituting for SR during high-nitrate freshwater runoff, which may remove substantial portion of the N introduced into the estuary. P speciation analysis further revealed that the concentrations of iron bound P decreased by 2.2 fold during the heavy rainfall compared to that measured before the rainfall. The results suggest that an excess supply of riverine Si keeps P from binding to Fe, thereby stimulating P release. Taking projections of enhanced rainfall events in the future into account, our results suggest that the intensified storm events and resultant riverine runoff induces a shift of Corg oxidation pathways in the sediments, which ultimately alters C-N-P-S-Fe dynamics and may deepen N-limiting conditions in coastal ecosystems of the Yellow Sea.en_US
dc.description.sponsorshipThis work was supported by the Korean Long-term Marine Ecological Research (K-LTMER) Program and the Deep Water Circulation and Material Cycling in the East Sea (20160040) project funded by the Korean Ministry of Oceans and Fisheries, and partly by the Korea Institute of Ocean Science and Technology (KIOST; PE99712), and by the National Research Foundation (NRF) grant funded by the Korean Ministry of Science and ICT (NRF-2018R1A2B2006340).en_US
dc.language.isoen_USen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.subjectTyphoon-induced rainfallen_US
dc.subjectFreshwater runoffen_US
dc.subjectIntertidal sedimenten_US
dc.subjectSulfate reductionen_US
dc.subjectIron reductionen_US
dc.subjectNutrient dynamicsen_US
dc.titleImpacts of typhoon-induced heavy rainfalls and resultant freshwater runoff on the partitioning of organic carbon oxidation and nutrient dynamics in the intertidal sediments of the Han River estuary, Yellow Seaen_US
dc.typeArticleen_US
dc.relation.volume691-
dc.identifier.doi10.1016/j.scitotenv.2019.07.031-
dc.relation.page858-867-
dc.relation.journalSCIENCE OF THE TOTAL ENVIRONMENT-
dc.contributor.googleauthorMok, Jin-Sook-
dc.contributor.googleauthorKim, Sung-Han-
dc.contributor.googleauthorKim, Jonguk-
dc.contributor.googleauthorCho, Hyeyoun-
dc.contributor.googleauthorAn, Sung-Uk-
dc.contributor.googleauthorChoi, Ayeon-
dc.contributor.googleauthorKim, Bomina-
dc.contributor.googleauthorYoon, Cheolho-
dc.contributor.googleauthorThamdrup, Bo-
dc.contributor.googleauthorHyun, Jung-Ho-
dc.relation.code2019003632-
dc.sector.campusE-
dc.sector.daehakCOLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E]-
dc.sector.departmentDEPARTMENT OF MARINE SCIENCE AND CONVERGENCE ENGINEERING-
dc.identifier.pidhyunjh-


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