title: The effect of low oxygen conditions on biogeochemical cycling of nutrients in a shallow seasonally stratified bay in southeast Korea (Jinhae Bay).
abstract: The formation and distribution of oxygen-deficient water mass (ODW) in Jinhae Bay exhibited seasonal patterns similar to those of the summer thermocline, indicating a close mutual relationship, and the influence of ODW formation conditions appeared prominently in the bottom water. The principal factors analysis indicate that dissolved oxygen and NO2 in the bottom water during the time of ODW formation were highly correlated with NH3 and dissolved inorganic phosphorus. The findings clearly illustrate the effects on ODW of seasonal physical and chemical changes. ODW that formed in the bottom water of Jinhae Bay during summer produced high concentrations of nutrients in the bottom water; since the growth of phytoplankton was limited by the strong stratification and low concentrations of dissolved oxygen (<3mg/L) in the bottom layer, these nutrients (especially NH3 and DIP) were retained and accumulated, serving as a major source of nutrients during the dry winter.
authors.affiliation: National Fisheries Research & Development Institute, Marine Environment Research Division, 216, GijangHaean-ro, Gijang-Up, Busan 619-705, Republic of Korea. Electronic address: youngsugkim@korea.kr.
authors.forename: Young-Sug
authors.initials: YS
authors.lastname: Kim
authors.affiliation: East Sea Fisheries Research Institute, Fisheries Resources and Environment Division, 1194, Haean-ro, yeongok-myeon, Gangneung-si, Gangwon-do 210-861, Republic of Korea.
authors.forename: Yong-Hwa
authors.initials: YH
authors.lastname: Lee
authors.affiliation: National Fisheries Research & Development Institute, Marine Environment Research Division, 216, GijangHaean-ro, Gijang-Up, Busan 619-705, Republic of Korea.
authors.forename: Jung-No
authors.initials: JN
authors.lastname: Kwon
authors.affiliation: National Fisheries Research & Development Institute, Marine Environment Research Division, 216, GijangHaean-ro, Gijang-Up, Busan 619-705, Republic of Korea.
authors.forename: Hee-Gu
authors.initials: HG
authors.lastname: Choi
mesh_terms: D061006:Bays / Q000032:analysis / Q000737:chemistry*; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D004784:Environmental Monitoring; D005068:Eutrophication; D010100:Oxygen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D010839:Phytoplankton / Q000254:growth & development; D025341:Principal Component Analysis; D056910:Republic of Korea; D012621:Seasons
chemical_list: D002734:Chlorophyll; D010758:Phosphorus; D010100:Oxygen; D000077194:Chlorophyll A
keywords: Dissolved oxygen; Jinhae Bay; Nutrients; Oxygen-deficient water mass; Physicochemical factor; Seasonal distribution