文献类型: 外文期刊
作者: Kang, Wei 1 ; Wang, Zhao-Hui 2 ; Liu, Lei 2 ; Guo, Xin 2 ;
作者机构: 1.Chinese Acad Fishery Sci, Key & Open Lab Marina & Estuary Fisheries, Minist Agr China, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
2.Jinan Univ, Coll Life Sci & Technol, Key Lab Eutrophicat & Red Tide Prevent, Guangdong Higher Educ Inst, Guangzhou 510632, Guangdong, Peoples R China
关键词: Alkaline phosphatase; Phosphorus limitation; Southern Chinese coast; Phytoplankton; The sea surface microlayer; Daya Bay
期刊名称:JOURNAL OF ENVIRONMENTAL SCIENCES ( 影响因子:5.565; 五年影响因子:5.066 )
ISSN: 1001-0742
年卷期: 2019 年 86 卷
页码:
收录情况: SCI
摘要: Three fractions of alkaline phosphatase activity (APA), including phytoplankton APA (phyto-APA), bacterial APA (bact-APA), and free-APA, were examined in the sea surface microlayer (SML) and the subsurface water (SSW) from Daya Bay, Guishan Island, and Guanghai Bay of southern China. Relationships between APA and environmental parameters were analyzed. The growth of phytoplankton was significantly limited by dissolved inorganic phosphorus (DIP) in the three sea areas, especially in Daya Bay. Total-APA ranged between 1.41 and 35.26 nmol/L/hr, and the highest value was found in Daya Bay. The increased APA in Daya Bay was the result of the increase of phytoplankton biomass and the response of phytoplankton to P limitation. Phyto-APA was the main contributor in Daya Bay, while phyto- and free-APA co-dominated in Guishan Island and Guanghai Bay. Bact-, phyto-, and total-APA showed a significant inverse power function relationship with DIP, and 0.2 mu mol/L was the threshold for DIP on particulates and total-APA. Pearson correlation analysis suggested that DIP limitation together with high N levels enhanced APA. High water temperature and freshwater input accelerated APA as well. Principal component analysis clearly separated samples from the three sea areas, as well as from the SML and the SSW, which indicated the differences in environmental parameters and APA levels. Our results highlight the influence of phosphorus limitation and environmental parameters on APA. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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