干旱区生态环境知识资源中心(Arid): Effects of prolonged drought on water quality after drying of a semiarid tropical reservoir, Brazil

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DOI	10.1016/j.limno.2022.125959
	Effects of prolonged drought on water quality after drying of a semiarid tropical reservoir, Brazil
	Cortez, Fernanda; Monicelli, Fernanda; Cavalcante, Herika; Becker, Vanessa
通讯作者	Cavalcante, H
来源期刊	LIMNOLOGICA
ISSN	0075-9511
EISSN	1873-5851
出版年	2022
卷号	93
英文摘要	In semiarid regions is recurrent water depletion of some reservoirs during periods of prolonged drought, intensifying eutrophication. After water depletion events, new waters arrival and the trophic state improvement is expected. Therefore, the aim of this study was to evaluate the change of the trophic state after the reservoir's drying due to a prolonged drought in the Brazilian semiarid region. It is expected that the trophic state improves after the water renewal by decreasing nutrient concentrations and algal biomass. This study was performed in a tropical, semiarid reservoir (Cruzeta Reservoir, Brazil), and was carried out during two different periods: 2012 (beginning of the prolonged drought) and 2019 (after the drying and reflooding). Analyses of Wilcoxon test and principal components analysis (PCA) were used to identify significant changes and patterns between the periods studied. The studied periods differed significantly (p < 0.05) with regard to maximum depth, pH, dissolved oxygen, conductivity, turbidity, inorganic and organic suspended solids, total phosphorus, soluble reactive phosphorus, nitrate and chlorophyll a. The hydrological regime of the Brazilian semi-arid region, governed by the prolonged drought period (from 2012 to 2019), contributed to significant changes in the volume and water quality in Cruzeta reservoir, increasing nutrients and algal biomass, intensifying the symptoms of eutrophication. Thus, contrary to the hypothesis of this study, despite the reflooding after the drought period, a worsening in the trophic state of the reservoir from eutrophic to hypereutrophic was observed.
英文关键词	Eutrophication Extreme event Supply source Water volume Drylands Reflooding
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000783176200004
WOS关键词	CLIMATE-CHANGE ; EUTROPHICATION ; PHOSPHORUS ; NITROGEN ; LAKE
WOS类目	Limnology
WOS研究方向	Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393753
推荐引用方式 GB/T 7714	Cortez, Fernanda,Monicelli, Fernanda,Cavalcante, Herika,et al. Effects of prolonged drought on water quality after drying of a semiarid tropical reservoir, Brazil[J],2022,93.
APA	Cortez, Fernanda,Monicelli, Fernanda,Cavalcante, Herika,&Becker, Vanessa.(2022).Effects of prolonged drought on water quality after drying of a semiarid tropical reservoir, Brazil.LIMNOLOGICA,93.
MLA	Cortez, Fernanda,et al."Effects of prolonged drought on water quality after drying of a semiarid tropical reservoir, Brazil".LIMNOLOGICA 93(2022).