title: Ocean acidification: One potential driver of phosphorus eutrophication.
abstract: Harmful algal blooms which may be limited by phosphorus outbreak increases currently and ocean acidification worsens presently, which implies that ocean acidification might lead to phosphorus eutrophication. To verify the hypothesis, oxic sediments were exposed to seawater with different pH 30days. If pH was 8.1 and 7.7, the total phosphorus (TP) content in sediments was 1.52±0.50 and 1.29±0.40mg/g. The inorganic phosphorus (IP) content in sediments exposed to seawater with pH8.1 and 7.7 was 1.39±0.10 and 1.06±0.20mg/g, respectively. The exchangeable phosphorus (Ex-P) content in sediments was 4.40±0.45 and 2.82±0.15μg/g, if seawater pH was 8.1 and 7.7. Ex-P and IP contents in oxic sediments were reduced by ocean acidification significantly (p<5%). The reduced phosphorus in sediments diffused into water, which implied that ocean acidification was one potential facilitator of phosphorus eutrophication in oxic conditions.
authors.affiliation: Marine College, Shandong University, Weihai, Weihai 264209, China. Electronic address: changzige@ouc.edu.cn.
authors.forename: Changzi
authors.initials: C
authors.lastname: Ge
authors.affiliation: Marine College, Shandong University, Weihai, Weihai 264209, China.
authors.forename: Yanchao
authors.initials: Y
authors.lastname: Chai
authors.affiliation: Marine College, Shandong University, Weihai, Weihai 264209, China.
authors.forename: Haiqing
authors.initials: H
authors.lastname: Wang
authors.affiliation: Marine College, Shandong University, Weihai, Weihai 264209, China.
authors.forename: Manman
authors.initials: M
authors.lastname: Kan
mesh_terms: D000143:Acids; D002681:China; D004784:Environmental Monitoring; D005068:Eutrophication; D019015:Geologic Sediments / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009792:Oceans and Seas; D010758:Phosphorus; D014874:Water Pollutants, Chemical
chemical_list: D000143:Acids; D014874:Water Pollutants, Chemical; D010758:Phosphorus
keywords: Eutrophication; Exchangeable phosphorus; Inorganic phosphorus; Ocean acidification