Variation of Microcystis and microcystins coupling nitrogen and phosphorus nutrients in Lake Erhai, a drinking-water source in Southwest Plateau, China

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	Variation of Microcystis and microcystins coupling nitrogen and phosphorus nutrients in Lake Erhai, a drinking-water source in Southwest Plateau, China
	Yu, Gongliang 1,2; Jiang, Yongguang 1,3; Song, Gaofei 1,3; Tan, Wenhua 1; Zhu, Mengling 1; Li, Renhui 1
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2014-08-01
卷号	21 期号:16 页码:9887-9898
关键词	Microcystin Microcystis Environmental factor Nitrogen Phosphorus mcy gene Lake Erhai
ISSN号	0944-1344
英文摘要	Lake Erhai is the second largest lake of Southwest China and an important drinking water source. The lake is currently defined as the preliminary stage of eutrophic states, but facing a serious threat with transfer into intensive eutrophication. The present study examined the dynamics of Microcystis blooms and toxic Microcystis in Lake Erhai during 2010, based on quantitative real-time PCR method using 16S rRNA gene specific for Microcystis and microcystin systhesis gene (mcy), and chemical analysis on microcystin (MC) concentrations. Total Microcystis cell abundance at 16 sampling sites were shown as an average of 1.7 x 10(7) cells l(-1) (1.3 x 10(2)-3.8 x 10(9) cells l(-1)). Microcystin LR (MC-LR) and microcystin RR (MC-RR) were the main variants. The strong southwesterly winds, anticlockwise circular flows and geographical characteristics of lake and phytoplankton community succession impacted the distribution patterns of Chl a and MC in the lake. The concentration of Chl a and MC and abundances of total Microsytis and MC-producing Microsystis (MCM) were shown to be positively correlated with pH, DO and TP, negatively correlated with SD, NO3-N, TN/Chl a and TN/TP, and not correlated with NH4-N, TN, dissolved total nitrogen (DTN) and water temperatures. When TN/TP decrease, Microcystis tended to dominate and MC concentrations tended to increase, suggesting that the "TN/TP rule" can be partially applied to explain the correlation between the cyanobacterial blooms and nutrients N and P only within a certain nutrient level. It is speculated that N and P nutrients and the associated genes (e.g., mcy) may jointly drive MC concentration and toxigenicity of Microcystis in Lake Erhai.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	REAL-TIME PCR ; CYANOBACTERIUM MICROCYSTIS ; ENVIRONMENTAL-FACTORS ; FRESH-WATER ; AERUGINOSA ; PHYTOPLANKTON ; DYNAMICS ; COMMUNITY ; BLOOM ; POPULATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000340613200043
公开日期	2015-01-20
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20403]
专题	水生生物研究所_藻类生物学及应用研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China 2.Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki, Japan 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yu, Gongliang,Jiang, Yongguang,Song, Gaofei,et al. Variation of Microcystis and microcystins coupling nitrogen and phosphorus nutrients in Lake Erhai, a drinking-water source in Southwest Plateau, China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2014,21(16):9887-9898.
APA	Yu, Gongliang,Jiang, Yongguang,Song, Gaofei,Tan, Wenhua,Zhu, Mengling,&Li, Renhui.(2014).Variation of Microcystis and microcystins coupling nitrogen and phosphorus nutrients in Lake Erhai, a drinking-water source in Southwest Plateau, China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,21(16),9887-9898.
MLA	Yu, Gongliang,et al."Variation of Microcystis and microcystins coupling nitrogen and phosphorus nutrients in Lake Erhai, a drinking-water source in Southwest Plateau, China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 21.16(2014):9887-9898.