title: Impacts of long-line aquaculture of Pacific oysters (Crassostrea gigas) on sulfate reduction and diffusive nutrient flux in the coastal sediments of Jinhae-Tongyeong, Korea.
abstract: We investigated the environmental impacts of long-line aquaculture of Pacific oysters (Crassostrea gigas) on sediment geochemistry and carbon oxidation by sulfate reduction and diffusive benthic nutrient flux in a coastal ecosystem in Korea. Inventories of the NH4(+) and HPO4(2-) at the farm site were 7.7-11.5 and 1.8-8.0 times higher, respectively, than those at a reference site. Sulfate reduction rates (SRRs) at the oyster farm were 2.4-5.2 times higher than SRRs at the reference site. The SRRs at the farm site were responsible for 48-99% (average 70%) of the total C oxidation in the sediment. The diffusive benthic fluxes of NH4(+) and HPO4(2-) at the oyster farm were comparable to 30-164% and 19-58%, respectively, of the N and P demands for primary production, and were responsible for the enhanced benthic microalgal biomass on the surface sediment.
authors.affiliation: Department of Marine Sciences and Convergent Technology, Hanyang University, 1271 Sa-3 dong, Ansan, Gyeonggi-do 426-791, Republic of Korea. Electronic address: hyunjh@hanyang.ac.kr.
authors.forename: Jung-Ho
authors.initials: JH
authors.lastname: Hyun
authors.forename: Sung-Han
authors.initials: SH
authors.lastname: Kim
authors.forename: Jin-Sook
authors.initials: JS
authors.lastname: Mok
authors.forename: Jae Seong
authors.initials: JS
authors.lastname: Lee
authors.forename: Sung-Uk
authors.initials: SU
authors.lastname: An
authors.forename: Won-Chan
authors.initials: WC
authors.lastname: Lee
authors.forename: Rae-Hong
authors.initials: RH
authors.lastname: Jung
mesh_terms: D000818:Animals; D017756:Aquaculture; D049896:Crassostrea; D017753:Ecosystem; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis*; D010710:Phosphates / Q000032:analysis*; D056910:Republic of Korea; D013431:Sulfates / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D010710:Phosphates; D013431:Sulfates; D014874:Water Pollutants, Chemical; D009584:Nitrogen
keywords: Benthic nutrient flux; Benthic–pelagic coupling; Crassostrea gigas; Fe and P cycles; Long-line oyster culture; Sulfate reduction