NDLI: Impact of water quality on bacterioplankton assemblage along Cértima River Basin (central western Portugal) assessed by PCR

Content Provider	Springer Nature Link
Author	Figueiredo, Daniela R. Ferreira, Raquel V. Cerqueira, Mário Melo, Teresa Condesso Pereira, Mário J. Castro, Bru B. Correia, António
Copyright Year	2011
Abstract	The information on bacterial community composition (BCC) in Portuguese water bodies is very scarce. Cértima River (central western Portugal) is known to have high levels of pollution, namely organic. In the present work, the BCC from a set of 16 water samples collected from Cértima River Basin and its main tributaries was characterized using 16S rDNA–denaturing gradient gel electrophoresis, a culture-independent molecular approach. Molecular data were related to environmental parameters through multivariate analysis to investigate potential impact of water pollution along the river. Principal component analysis using environmental data showed a water quality gradient from more pristine waters (at the mountain tributaries) to waters with increasingly eutrophic potential (such as Fermentelos Lake). This gradient was mainly defined by factors such as organic and inorganic nutrient sources, electrical conductivity, hydrogen carbonate concentration, and pH. Molecular results showed variations in BCC along Cértima River Basin but in the main river section, a Bacteroidetes phylotype (Flavobacterium sp.) proved to be dominant throughout the river course. Multivariate analysis suggests that spatial variation of BCC along the Cértima River Basin depended mainly on parameters such as Chl a, total suspended solid (TSS), total organic carbon, electrical conductivity, and HCO $_{3}^{-}$ levels. Bacteroidetes phylotypes were all related to higher electrical conductivity and HCO $_{3}^{-}$ levels although some of these were also correlated with high SO $_{4}^{2-}$ and others with high soluble reactive phosphorus, nitrate, TN, and Kjeld-N levels. The Gammaproteobacteria occurrence was correlated with high SO $_{4}^{2-}$ levels. One of the Betaproteobacteria phylotypes showed to correlate with low redox potential (Eh) and high temperature, pH, TSS, and Chl a levels while another one showed a negative correlation with Chl a values.
Starting Page	471
Ending Page	485
Page Count	15
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	184
Issue Number	1
e-ISSN	15732959
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Riverine bacterioplankton diversity 16S rDNA–DGGE Organic pollution Nutrients CCA analysis Atmospheric Protection/Air Quality Control/Air Pollution Environmental Management Ecology Environmental Monitoring/Analysis Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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