Correlation between spore-forming bacteria and physicochemical parameters in water samples from irrigated rice ecosystems in Southern Brazil

2012 ◽  
Author(s):  
Michele Pittol ◽  
Victor Hugo Valiati ◽  
Lidia Mariana Fiuza
Keyword(s):  
Water Samples ◽  
Physicochemical Parameters ◽  
Southern Brazil ◽  
Irrigated Rice ◽  
Rice Ecosystems ◽  
Spore Forming Bacteria

scholarly journals Distribution and density of bacteria in subtropical flooded rice growing areas in Brazil

2005 ◽  
Vol 65 (3) ◽  
pp. 503-511 ◽  
Author(s):  
M. H. L. R. Reche ◽  
L. M. Fiuza
Keyword(s):  
Water Samples ◽  
Cell Structure ◽  
Gram Positive ◽  
Irrigated Rice ◽  
And Function ◽  
Production Areas ◽  
Work Done ◽  
Bacterial Groups ◽  
Spore Forming Bacteria ◽  
Culture Phase

Since microorganisms are important components in the structure and function of water systems, the present paper reports work done to identify groups making up bacterial communities present in rice irrigation water. To this end, water samples were collected in five rice-growing areas of Rio Grande do Sul State, Brazil. The identification of the main bacterial groups found in flooded areas was carried out based on colony morphology, taking into account shape, elevation, and edges. Internal and external cell structure was characterized as cocci or rod, gram-positive or gram-negative, and spore forming or not. The results obtained regarding density and bacterial distribution in the water samples from rice growing areas of RS showed a higher abundance of morphotypes of bacterial colonies in the irrigation channels (F1, 12 = 8.74; p < 0.05) when compared to the culture plots in the five production regions, and in the final culture phase (F1, 12 = 8.86; p < 0.05). In the five rice production areas the occurrence of gram-positive and spore-forming rods was prevalent. Rods showed more abundance (F1, 26 = 15.12; p < 0.05) in the early culture phase, with a significant prevalence of gram-positive rods (F1, 26 = 25.99; p < 0.05) in all rice growing regions under investigation. The group of spore-forming bacteria was significantly more abundant (F1, 30 = 14.06; p < 0.05) when compared with the non-spore-forming ones in all investigated regions. Data showed that the irrigated rice crop affects the density and morphotype colonies in the bacteria found in the water used to flood rice-growing plots.

scholarly journals Genotoxic Potential and Physicochemical Parameters of Sinos River, Southern Brazil

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Madalena C. S. Scalon ◽  
Ciliana Rechenmacher ◽  
Anna Maria Siebel ◽  
Michele L. Kayser ◽  
Manoela T. Rodrigues ◽  
...  
Keyword(s):  
Water Quality ◽  
Comet Assay ◽  
Water Samples ◽  
Physicochemical Parameters ◽  
Physicochemical Analysis ◽  
Quality Analysis ◽  
Control Group ◽  
Southern Brazil ◽  
National Guidelines ◽  
Genotoxic Potential

The present study aimed to evaluate the physicochemical parameters and the genotoxic potential of water samples collected in the upper, middle, and lower courses of the Sinos River, southern Brazil. The comet assay was performed in the peripheral blood of fishHyphessobrycon luetkeniiexposed under laboratory conditions to water samples collected in summer and winter in three sampling sites of Sinos River. Water quality analysis demonstrated values above those described in Brazilian legislation in Parobé and Sapucaia do Sul sites, located in the middle and in the lower courses of the Sinos River, respectively. The Caraá site, located in the upper river reach, presented all the physicochemical parameters in accordance with the allowed limits in both sampling periods. Comet assay in fish revealed genotoxicity in water samples collected in the middle course site in summer and in the three sites in winter when compared to control group. Thus, the physicochemical parameters indicated that the water quality of the upper course complies with the limits set by the national guidelines, and the ecotoxicological assessment, however, indicated the presence of genotoxic agents. The present study highlights the importance of combining water physicochemical analysis and bioassays to river monitoring.

Uranium Concentrations and Some Physicochemical Parameters of Water Samples at Marshes (Ahwar) in Dhi-Qar Governorate

2021 ◽  
Vol 232 (4) ◽  
Author(s):  
Awsam Abdulsattar Marzaali ◽  
Mohammed A. Al-Shareefi ◽  
Ali Abid Abojassim
Keyword(s):  
Water Samples ◽  
Physicochemical Parameters

Genetic Progress in 45 Years of Irrigated Rice Breeding in Southern Brazil

Crop Science ◽  
2018 ◽  
Vol 58 (3) ◽  
pp. 1094-1105 ◽  
Author(s):  
Eduardo Anibele Streck ◽  
Ariano Martins de Magalhaes ◽  
Gabriel Almeida Aguiar ◽  
Paulo Karling Henrique Facchinello ◽  
Paulo Ricardo Reis Fagundes ◽  
...  
Keyword(s):  
Rice Breeding ◽  
Southern Brazil ◽  
Genetic Progress ◽  
Irrigated Rice

Influence of Blast on the Nutrition and Yield of Irrigated Rice in Southern Brazil

2020 ◽  
Vol 20 (3) ◽  
pp. 1378-1386 ◽  
Author(s):  
Claudio Ogoshi ◽  
Filipe Selau Carlos ◽  
Daniel Waldow ◽  
Fernando Fumagali Miranda ◽  
Júlia Lima Reginato ◽  
...  
Keyword(s):  
Southern Brazil ◽  
Irrigated Rice

scholarly journals Hydrogeochemical Analysis and Spatial Distribution of Groundwater Quality in Roundhill Landfill Vicinity of South Africa

2019 ◽  
Vol 12 ◽  
pp. 117862211987277 ◽  
Author(s):  
Joan Nyika ◽  
Ednah Onyari
Keyword(s):  
South Africa ◽  
Spatial Distribution ◽  
Sodium Chloride ◽  
Landfill Leachate ◽  
Water Samples ◽  
Physicochemical Parameters ◽  
Anthropogenic Activities ◽  
Anthropogenic Pollution ◽  
Physicochemical Characteristics ◽  
Magnesium Carbonate

Groundwater is the most reliable resource for consumptive uses worldwide, but it is vulnerable to anthropogenic pollution in this post-industrialization era. Pollution of the resource may result from anthropogenic activities; hence, analysing the effects of leachate on groundwater is imperative. This study assessed the spatial distribution of physicochemical parameters of groundwater in Roundhill landfill vicinity of South Africa and conducted their hydrogeochemical analysis. Water samples were collected from 3 boreholes in the landfill surroundings and analysed for selected physicochemical characteristics. Spatial distribution of these parameters showed dominant pollution by Mn2+, Fe2+, and [Formula: see text], which surpassed prescribed allowable limits of the country in most of the study area. Possibilities of simple dissolution and ion mixing were deduced from the Durov diagram. Magnesium carbonate, sodium chloride, and mixed faces of groundwater were dominant in boreholes 1 to 3, respectively. The dominance of Ca2+, Cl−, Mg2+, and [Formula: see text] ions in some boreholes suggested anthropogenic pollution. Landfill leachate was associated with groundwater pollution in the study area.

scholarly journals Seasonal Dynamics of the Microbial and Physicochemical Characteristics of Streams and Boreholes in Uzuakoli, Eastern Nigeria

2019 ◽  
Vol 10 (2) ◽  
pp. 17
Author(s):  
Okezie Onyemaechi ◽  
Nwachukwu Ejikeme
Keyword(s):  
Dissolved Oxygen ◽  
Water Samples ◽  
Physicochemical Parameters ◽  
Stream Water ◽  
Oxygen Demand ◽  
Enterobacter Aerogenes ◽  
Physicochemical Characteristics ◽  
Potassium Nitrate ◽  
Significant Difference ◽  
Dry And Rainy Seasons

Water samples from twenty water sources (fifteen boreholes and five streams) in Uzuakoli, Nigeria were collected for the period of 6 months covering the dry and rainy seasons to assess the level of contamination. The Microbiological characteristics including heterotrophic counts, coliform counts and physicochemical parameters includes pH, turbidity, dissolved oxygen, calcium, potassium, nitrate, magnesium and phosphate were evaluated using standard methods. The total Heterotrophic counts for the borehole during the dry and rainy season were 8.3 x 103 cfu/ ml and 10.8 x 104 cfu/ ml. The Heterotrophic counts for the stream were 12.7 x 104 cfu/ ml and 17.8x 106 cfu/ ml. The frequency of occurrence of the isolates are Staphylococcus aureus 63% in borehole and 85% in streams, Pseudomonas aeruginosa 49% in boreholes and 95% in streams, Proteus sp 52% in boreholes and 97% in streams, Streptococcus sp 46% in boreholes and 53% in streams, Enterobacter aerogenes 33% in boreholes and 63% in streams, Escherichia coli 16% in boreholes and 53% in streams and Salmonella sp no percentage in boreholes and 40% in streams. The result shows a significant difference at (P≤0.05) for the bacterial isolates. The physicochemical parameters of the borehole and stream water samples during the dry and rainy seasons were determined. The temperature ranged from 25oC 32oC; pH ranged from 5.3 8.1; turbidity ranged 0.03 3.23; dissolved oxygen ranged from 3.45–7.40mg/l; biochemical oxygen demand ranged from 1.20–4.32mg/l; chemical oxygen demand ranged from 2.50–5.21mg/l; Calcium ranged from 0.81–5.64mg/l; potassium ranged from 1.01–4.22mg/l; Nitrate ranged from 1.49–4.02mg/l; magnesium ranged from 0.13–2.20mg/l; phosphate ranged from 0.51–2.01mg/l. The water samples were all within the WHO limits apart from sample from Iyi Agbozu that had temperature of 32oC.

scholarly journals Relationships between the occurrence of Giardia and Cryptosporidium and physicochemical properties of marine waters of the Pacific Coast of Mexico

2010 ◽  
Vol 8 (4) ◽  
pp. 797-802 ◽  
Author(s):  
Dalia Magana-Ordorica ◽  
Kristina Mena ◽  
Jose B. Valdez-Torres ◽  
Marcela Soto-Beltran ◽  
Josefina Leon-Felix ◽  
...  
Keyword(s):  
Water Samples ◽  
Physicochemical Parameters ◽  
Pacific Coast ◽  
Microbial Quality ◽  
Recreational Water ◽  
Regression Analyses ◽  
Recreational Waters ◽  
Untreated Sewage ◽  
The Pacific

Untreated sewage has adversely affected the quality of marine recreational waters worldwide. Exposure to marine recreational water with poor microbial quality may pose a threat to bathers. The objectives of this study were to assess the effect of physicochemical parameters on Cryptosporidium and Giardia presence in marine recreational water of Sinaloa, Mexico, by Logistic Regression Analyses. Thirty-two 10-litre water samples were collected from two tourist beaches, Altata and Mazatlan, between November 2006 and May 2007. Water samples were processed by the EPA 1623 method and pH, temperature, salinity and turbidity were also determined. Cryptosporidium and Giardia were present in 71 and 57% of the samples collected from Altata, respectively. In Mazatlan, Cryptosporidium and Giardia were found in 83 and 72% of the samples, respectively. The overall concentration of Cryptosporidium ranged from 150 to 2,050 oocysts/10 L with an average of 581 oocysts/10 L and Giardia ranged from 10 to 300 cysts/10 L with an average of 73 cysts/10 L. The occurrence of both parasites increased in water with decreasing temperatures and increasing turbidity of the water.

scholarly journals IMPACTS OF DUMPSITE ON SOIL AND GROUNDWATER QUALITY: A CASE STUDY OF ERINFUN COMMUNITY, ADO EKITI, SOUTHWESTERN NIGERIA

2021 ◽  
Vol 5 (2) ◽  
pp. 112-116
Author(s):  
F., F. Akinola ◽  
M., O. Lasisi ◽  
B., S. Awe
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Sample ◽  
Biochemical Oxygen Demand ◽  
Water Samples ◽  
Physicochemical Parameters ◽  
Oxygen Demand ◽  
Soil Samples ◽  
World Health ◽  
Health Organization

Groundwater pollution has increased as a result of poor waste disposal practices in developing countries. The purpose of this study was to determine the levels of physicochemical parameters and heavy metal concentrations in order to investigate the impact of dumpsites on groundwater and soil quality in Erinfun community. Four (4) water samples were collected hand dug well and four (4) soil samples designated Ss1 to Ss4 were collected at distances of 10, 20, 30 and 40 m, respectively, away from the waste dumpsite. Physicochemical parameters and traces such as odour, colour, taste and temperature, as well as Biochemical Oxygen Demand, Chemical Oxygen Demand, Dissolve Oxygen, Total Dissolve Solid, pH, and chloride were measured in collected water samples. Collected soil samples were also analyzed for heavy metals such as Magnesium, Zinc, Iron, Chromium, and Lead. All the physical parameters of the water samples analysed were found not to be within the acceptable limit of World Health Organization and Nigerian Standard of Drinking Water Quality standards. The chemical constituents tested were within the acceptable limit of World Health Organization and Nigerian Standard of Drinking Water Quality except for the Biochemical Oxygen Demand, Chemical Oxygen Demand and Dissolve Oxygen of water samples 1 and 2, respectively. The concentration of trace metals in water sample test were within health limit except for Magnesium and Iron which has the highest concentrations in water sample 1 at 10 m away from dumpsite (61.00 mg/l and 0.46 mg/l). Consequently, open dumpsites are discouraged, and constructed standard landfills with appropriate monitoring guidelines are recommended.

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