干旱区生态环境知识资源中心(Arid): Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil

Arid

DOI	10.1590/1519-6984.182599
	Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil
	Rego, A. H. G.1; Rangel-Junior, A.2; Costa, I. A. S.1
通讯作者	Costa, I. A. S.
来源期刊	BRAZILIAN JOURNAL OF BIOLOGY
ISSN	1519-6984
EISSN	1678-4375
出版年	2020
卷号	80 期号:1 页码:1-11
英文摘要	The objective of this study was to characterize the limnological, microystin and phytoplankton community of five tropical eutrophic reservoirs located in the Brazilian northeastern semi-arid region, used for domestic use at the time of extreme drought and reduction of water volume. The study was conducted in July and August 2015, and an integrated sample of the water column was collected at three points near the darn in each reservoir. Analysis of limnological parameters, identification and quantification of phytoplankton, with emphasis on cyanobacteria were performed, as well as detection of microcystin by means of immunoassay (ELISA). The reservoirs presented similar to 90% water volume reduction. Iligh turbidity and concentrations of nitrogen and phosphorus, as well as high cyanobacterial densities, revealed an increase in the eutrophic state for hypereutrophy. The total biovolume of phytoplankton and cyanobacterial density is high, plus an average increase in relation to previous studies of 350% and 150%, respectively. The density of cyanobacteria and microcystin concentration presented values above acceptable levels for drinking water according to Brazilian legislation. A phytoplankton community was represented by 17 functional groups, including potentially toxic cyanobacteria species such as Planktothrix agardhii (S1), Microcystis aeruginosa (M), Anabaena planktonica e Anabaena spp. (H1), cylindrospermopsis raciborskii (Sn). Our results confirm that conditions of extreme drought and reduction of the volume of the reservoirs influence the composition, biovolume of phytoplankton and water quality, but not the increase of total microcystin in the analysed, although above 1 mu g(-1) registered a significant decrease of water quality in used for human consumption.
英文关键词	cyanobacteria functional groups reservoirs heavy metals eutrofication
类型	Article
语种	英语
国家	Brazil
开放获取类型	Green Submitted, gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000521730500035
WOS关键词	FUNCTIONAL-GROUPS ; EUTROPHIC RESERVOIRS ; COMMUNITY ; DYNAMICS ; CYANOBACTERIA ; ASSEMBLAGES ; LAKE ; ASSOCIATIONS ; BLOOMS ; SOIL
WOS类目	Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314204
作者单位	1.Univ Fed Rio Grande do Norte UFRN, Ctr Biociencias, Dept Microbiol & Parasitol,Programa Posgrad Desen, Grp Pesquisas Ecol & Microbiol Ecossistemas Aqut, Campus Univ,BR 101, BR-59072000 Natal, RN, Brazil; 2.Univ Reg Cariri URCA, PPBM, Rua Cel Antonio Luiz 1161, BR-63105000 Crato, CE, Brazil
推荐引用方式 GB/T 7714	Rego, A. H. G.,Rangel-Junior, A.,Costa, I. A. S.. Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil[J],2020,80(1):1-11.
APA	Rego, A. H. G.,Rangel-Junior, A.,&Costa, I. A. S..(2020).Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil.BRAZILIAN JOURNAL OF BIOLOGY,80(1),1-11.
MLA	Rego, A. H. G.,et al."Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil".BRAZILIAN JOURNAL OF BIOLOGY 80.1(2020):1-11.