Effects of nutrient temporal variations on toxic genotype and microcystin concentration in two eutrophic lakes

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Effects of nutrient temporal variations on toxic genotype and microcystin concentration in two eutrophic lakes
	Shi, Wenqing; Zhang, Jianyun; Yi, Qitao; Hu, Liuming; Wang, Min; Chen, Qiuwen
刊名	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
	2018-12-30
卷号	166 页码:192-199
关键词	Toxic Microcystis Microcystin Environmental factors Nitrogen Phosphorus
ISSN号	0147-6513
文献子类	Article
英文摘要	Harmful cyanobacterial blooms are a growing threat to freshwater ecosystems worldwide due to the production of microcystin (MC), which can have detrimental effects on water quality and human health. The relations between MC-producing Microcystis, MC production, and environmental variables especially nutrient conditions in eutrophic lakes, Lake Taihu and Lake Yanghe, were investigated during the bloom season of 2015. Results showed that toxigenic cells contributed to 8.94-75.68% and 7.87-58.69% of the total Microcystis in Lake Taihu and Lake Yanghe, respectively. The dynamics of toxigenic cells and MC production were positively associated with NH3-N concentration in Lake Taihu, while positively associated with the concentrations of TP, TDP and PO4-P in Lake Yanghe, indicating that the dominant nutrient factor affecting the toxic blooms was nitrogen in Lake Taihu, whereas it was phosphorus in Lake Yanghe. The significant relationship between TLR eq (total MC after transformation of MC-RR and MC-YR into MC-LR) and Chlorophyll-a (Chl-a) concentration implied that Chl-a could be an alternative measure to predict MC risk in the two lakes, and the safe threshold value of Chl-a was proposed as 25.38 and 31.06 mu g/L in Lake Taihu and Lake Yanghe, respectively.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41133]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Shi, Wenqing,Zhang, Jianyun,Yi, Qitao,et al. Effects of nutrient temporal variations on toxic genotype and microcystin concentration in two eutrophic lakes[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2018,166:192-199.
APA	Shi, Wenqing,Zhang, Jianyun,Yi, Qitao,Hu, Liuming,Wang, Min,&Chen, Qiuwen.(2018).Effects of nutrient temporal variations on toxic genotype and microcystin concentration in two eutrophic lakes.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,166,192-199.
MLA	Shi, Wenqing,et al."Effects of nutrient temporal variations on toxic genotype and microcystin concentration in two eutrophic lakes".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 166(2018):192-199.