干旱区生态环境知识资源中心(Arid): Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs

Arid

DOI	10.1590/2318-0331.011716072
	Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs
	Goncalves Barros, Mario Ubirajara; Carloto Lopes, Ismael Keslley; de Castro Carvalho, Stella Maris; Capelo Neto, Jose
通讯作者	Barros, MUG
来源期刊	RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS
ISSN	1414-381X
EISSN	2318-0331
出版年	2017
卷号	22
英文摘要	Artificial lakes play an important role in water availability in tropical semi-arid Northeastern Brazil. However, in addition to the negative effects that dams have on the water quality of rivers, other practices such as discharge of untreated wastewater, intensive crop fertilization and fish farming have been contributing to water quality deterioration. Climate change may be another driver of water quality decrease. Increases in precipitation and drought intensities as well as temperature increase may redefine the dynamics of planktonic communities and favour species more adapted to the new environment. Water samples were collected in two reservoirs selected based on the recurrence of positive results for saxitoxins, Acarape do Meio (AM) and Sitios Novos (SN). In general, diversity in SN (1.08) was higher than in the AM (0.60). Phytoplankton dynamics in these reservoirs differ from other reservoirs in the same region of Brazil, in the sense that filamentous cyanobacteria are dominant. Furthermore, lower diversity, concentration and richness of chlorophyceae and bacillariophyceae were found in both reservoirs. Increase in diversity was observed during the intense rainy season of 2011, suggesting a slight improvement of water quality. A close inverse correlation between Cylindrospermopsis sp and other cyanobacteria was found in SN (R-2=-0.862) and in AM (R-2=-0.997) and the data collected demonstrates that a season with intensive rainfall may lead to lower cyanobacteria concentrations probably due to water dilution and higher flushing rates.
英文关键词	Artificial reservoirs Freshwater cyanobacteria Semi-arid regions Temporal phytoplankton dynamics Eutrophication
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000424560900007
WOS关键词	BLOOM CYLINDROSPERMOPSIS-RACIBORSKII ; PHYTOPLANKTON COMMUNITY ; PLANKTOTHRIX-AGARDHII ; CLASSIFICATION-SYSTEM ; SEMIARID REGION ; DYNAMICS ; CYANOPHYTES ; CASCADE ; GROWTH ; LIGHT
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332530
作者单位	[Goncalves Barros, Mario Ubirajara; Carloto Lopes, Ismael Keslley; Capelo Neto, Jose] Univ Fed Ceara, Fortaleza, Ceara, Brazil; [de Castro Carvalho, Stella Maris] Co Agua & Esgoto Ceara, Fortaleza, Ceara, Brazil
推荐引用方式 GB/T 7714	Goncalves Barros, Mario Ubirajara,Carloto Lopes, Ismael Keslley,de Castro Carvalho, Stella Maris,et al. Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs[J],2017,22.
APA	Goncalves Barros, Mario Ubirajara,Carloto Lopes, Ismael Keslley,de Castro Carvalho, Stella Maris,&Capelo Neto, Jose.(2017).Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs.RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS,22.
MLA	Goncalves Barros, Mario Ubirajara,et al."Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs".RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS 22(2017).