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Dredging effects on P status and phytoplankton density and composition during winter and spring in Lake Taihu, China
Cao, Xiuyun; Song, Chunlei; Li, Qingman; Zhou, Yiyong
2007-05-01
Source PublicationHYDROBIOLOGIA
ISSN0018-8158
Volume581Pages:287-295
AbstractPhytoplankton density and composition, together with phosphorus (P) concentrations and size-fractionated alkaline phosphatase activity (APA), were investigated in dredged and undredged zones in Lake Taihu from January to April 2004. P concentrations were also determined in the corresponding interstitial water. Enzyme Labeled Fluorescence (ELF) was used for localizing extracellular phosphatase on phytoplankton cell membranes in April. The increase in phytoplankton density was paralleled by a significant increase in soluble reactive P (SRP) concentrations in the water column and interstitial water at all sites from January to April, with chlorophyte gradually becoming dominant. In February, at the undredged site, more algae dominated by chlorophyte occurred in overlying water, rather than in the surface, coinciding with higher SRP concentrations in overlying and interstitial water. Therefore, P status in the bottom is important to phytoplankton development in terms of density and composition. Undredged sites had higher SRP concentrations in interstitial water than dredged sites. Furthermore, Higher APA was observed, accompanied by higher dissolved organic P (DOP) and lower total P at the undredged site in February. Enzymatic hydrolysis of DOP may have been an additional source of P for phytoplankton. In April, Schroederia sp. was ELF labeled in surface water at the dredged site, which showed markedly lower SRP concentration, but not at the undredged site with higher SRP concentration. Thus, the dredging might regulate algal density and composition in water column by reducing P bioavailability.
SubtypeArticle
KeywordPhytoplankton Phosphorus Alkaline Phosphatase Elf Sediment Dredging Shallow Lakes Eutrophication
DOI10.1007/s10750-006-0516-2
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed ByISTP ; SCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS KeywordALKALINE-PHOSPHATASE ACTIVITY ; NUTRIENT LIMITATION ; PHOSPHORUS ; QUANTIFICATION ; ASSEMBLAGES ; WATERS ; BAY
WOS IDWOS:000244992800029
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/27234
Collection中科院水生所知识产出(2009年前)
AffiliationChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Cao, Xiuyun,Song, Chunlei,Li, Qingman,et al. Dredging effects on P status and phytoplankton density and composition during winter and spring in Lake Taihu, China[J]. HYDROBIOLOGIA,2007,581:287-295.
APA Cao, Xiuyun,Song, Chunlei,Li, Qingman,&Zhou, Yiyong.(2007).Dredging effects on P status and phytoplankton density and composition during winter and spring in Lake Taihu, China.HYDROBIOLOGIA,581,287-295.
MLA Cao, Xiuyun,et al."Dredging effects on P status and phytoplankton density and composition during winter and spring in Lake Taihu, China".HYDROBIOLOGIA 581(2007):287-295.
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