Evaluation of tropical water sources and mollusks in southern Brazil using microbiological, biochemical, and chemical parameters

2012 ◽  
Vol 76 ◽  
pp. 153-161 ◽  
Author(s):  
Doris Sobral Marques Souza ◽  
Ana Paula Dores Ramos ◽  
Fabrício Flores Nunes ◽  
Vanessa Moresco ◽  
Satie Taniguchi ◽  
...  
Keyword(s):  
Water Sources ◽  
Southern Brazil ◽  
Chemical Parameters ◽  
Tropical Water

scholarly journals Distribution of paralarvae and small juvenile cephalopods in relation to primary production in an upwelling area off southern Brazil

2010 ◽  
Vol 67 (7) ◽  
pp. 1346-1352 ◽  
Author(s):  
Erica A. G. Vidal ◽  
Manuel Haimovici ◽  
Vivian C. S. Hackbart
Keyword(s):  
Primary Production ◽  
Saline Water ◽  
Southern Brazil ◽  
Chl A ◽  
Small Juvenile ◽  
Tropical Water ◽  
Brazil Current ◽  
Plankton Production ◽  
School Formation ◽  
Upwelling Area

Abstract Vidal, E. A. G., Haimovici, M., and Hackbart, V. C. S. 2010. Distribution of paralarvae and small juvenile cephalopods in relation to primary production in an upwelling area off southern Brazil. – ICES Journal of Marine Science, 67: 1346–1352. The distribution of paralarvae and small juvenile cephalopods sampled by a rectangular midwater trawl (opening area 8 m2) over the continental shelf off Cape Santa Marta Grande, southern Brazil (28°09′S–29°56′S) during spring 1989 is discussed. An intrusion of Brazil Current Tropical Water (22°C; 36.5) separates warm, less-saline water (22°C; 35.2) from cooler, more-saline water (15°C; 36.4). Prevailing northeasterly winds led to upwelling of South Atlantic Central Water over the shelf, promoting high Chl a concentrations. Three species constituted 99% of the 628 cephalopods collected: Illex argentinus (n = 540; 4–40 mm mantle length, ML), Argonauta nodosa (n = 46; 2–19 mm ML), and Loligo sanpaulensis (n = 42, 2–21 mm ML). Segregation of I. argentinus juveniles of similar size suggests school formation as small as 10 mm ML. The presence of mature males along with fertilized female A. nodosa indicates mating early in life. There was a consistent and direct link between high plankton production and high densities of juvenile cephalopods through a short and ecologically efficient food chain. The relationship between production, pycnocline intensity, and the density of paralarvae and juveniles revealed suitable conditions for survival and growth during the upwelling season.

scholarly journals Distribution and abundance of the Lesser electric ray Narcine brasiliensis (Olfers, 1831) (Elasmobranchii: Narcinidae) in southern Brazil in relation to environmental factors

2009 ◽  
Vol 57 (2) ◽  
pp. 105-112 ◽  
Author(s):  
Gabriel Maciel de Souza Vianna ◽  
Carolus Maria Vooren
Keyword(s):  
Coastal Water ◽  
Latitudinal Gradient ◽  
Seasonal Pattern ◽  
Rio Grande ◽  
Bottom Trawl ◽  
Trawl Survey ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Patos Lagoon ◽  
Tropical Water

The distribution and abundance of the lesser electric ray, Narcine brasiliensis, was assessed based on bottom-trawl survey data collected off the coast of Rio Grande do Sul, southern Brazil. Between 1980 and 1984 and in 2005, 416 bottom trawl hauls were carried out at depths of 10-100 m. Narcine brasiliensis occurred mainly in waters with bottom temperature between 20 and 25ºC. Density of the species was higher between the depths of 10 and 20 m, during the summer and autumn. The seasonal pattern of N. brasiliensis in the shallow coastal water of Rio Grande do Sul reflects a southward migration in summer. This is conditioned by the southward advance of warmer and high-salinity Tropical Water of the Brazil Current In winter, the return or northward migration is a response to seasonal cooling of the coastal waters and to the northward advance of cold Coastal Water of lower salinity. The latitudinal gradient in density of N. brasiliensis was related to the latitudinal gradient in salinity of the bottom waters. This was caused by the freshwater runoff from the Patos Lagoon establishing a physical barrier to the occurrence of the species farther south than the city of Rio Grande.

scholarly journals Viticultural performance of Cabernet Sauvignon clones in highland region of southern Brazil

2019 ◽  
Vol 41 (5) ◽  
Author(s):  
José Luiz Marcon Filho ◽  
Leo Rufato ◽  
Amauri Bogo ◽  
Tiago Afonso De Macedo ◽  
Douglas André Würz ◽  
...  
Keyword(s):  
Principal Component ◽  
Cabernet Sauvignon ◽  
Southern Brazil ◽  
Chemical Parameters ◽  
Growing Seasons ◽  
Physical Chemical ◽  
Grape Quality ◽  
Experimental Block ◽  
Commercial Vineyard ◽  
Physical And Chemical

Abstract The Cabernet Sauvignon (CS) cultivar is one of the most widely planted wine grapes in Brazil. The final grape quality depends on the clone type, rootstock, and the terroir. This study aims to assess and characterize the effects of seven combinations of CS clones grafted onto two rootstocks on the physical–chemical parameters and productivity of the grapes in the highland of southern Brazil, during the 2012-2013, 2013-2014, 2014-2015, and 2015-2016 growing seasons. The experiment was carried out in a 14-year-old commercial vineyard, located in São Joaquim municipality, Santa Catarina State, trained on a vertical shoot position system on a double cordon with spur pruning. The treatments consisted in a completely randomized experimental block of the combination (clone/rootstock) of CS 169, 337, 341, and R5 clones grafted onto the Paulsen 1103 (P1103) rootstock, and 169, 170, and 339 clones grafted onto the Courdec 3309 (C3309) rootstock. There were significant differences among the combinations of CS grapes on productivity, physical, and chemical parameters and grape maturation. The data of principal component analysis showed that 339/C3309 and 337/P1103 combinations were the most productive, whereas the R5/P1103, 170/C3309, and 169/C3309 combinations were the best for potential winemaking under the edaphoclimatic conditions of the highlands of southern Brazil in all growing seasons evaluated.

scholarly journals Controle da Qualidade da Água do Arroio Portão Portão, RS

2005 ◽  
Vol 32 (1) ◽  
pp. 27 ◽  
Author(s):  
ROBERTO NAIME ◽  
ROSÂNGELA SCHUCH FAGUNDES
Keyword(s):  
Quality Of Life ◽  
Environmental Conditions ◽  
Rio Grande ◽  
Economic Conditions ◽  
Actual Situation ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Chemical Parameters ◽  
Hydrographic Basin

This work presents the environment attendance of Portão River, a river of the hydrographic basin of Rio dos Sinos, Rio Grande do Sul, southern Brazil. The improvement of environmental conditions demands a diagnostic of the actual situation. By this way, it is possible to propose mitigation, compensation and promotion of better quality of life for the populations. Chemical parameters of water were observed during three months, in order to evaluate the environmental conditions, and to promote environmental improvement for this region, in the context of physical, biological and economic conditions.

scholarly journals Assessment of bacteriological quality and physico-chemical parameters of domestic water sources in Samaru community, Zaria, Northwest Nigeria

Heliyon ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. e04773
Author(s):  
Taiwo Adekanmi Adesakin ◽  
Abayomi Tolulope Oyewale ◽  
Umar Bayero ◽  
Abubakar Ndagi Mohammed ◽  
Iduwo Adedeji Aduwo ◽  
...  
Keyword(s):  
Water Sources ◽  
Chemical Parameters ◽  
Domestic Water ◽  
Bacteriological Quality ◽  
Physico Chemical

Diversity and characteristics of yeasts from water sources in the North West Province, South Africa

2012 ◽  
Vol 12 (4) ◽  
pp. 422-430
Author(s):  
D. A. B. Van Wyk ◽  
C. C. Bezuidenhout ◽  
O. H. J. Rhode
Keyword(s):  
South Africa ◽  
Water Sources ◽  
Malt Extract ◽  
Chemical Parameters ◽  
Candida Spp ◽  
North West ◽  
The North ◽  
Physico Chemical ◽  
North West Province ◽  
Cryptococcus Spp

Yeasts form an important part of ecosystems. Yeast biodiversity in the North West Province, South Africa, remains largely unexplored. The purpose of this study was to determine the diversity and characteristics of yeasts from water sources in the North West Province. Yeasts were isolated from four rivers and an inland lake. Various parameters were measured to determine the physico-chemical quality of the water. Isolation was done on yeast-malt-extract (YM) agar and identified using biological methods. Physico-chemical parameters were within a target water quality range for various water uses. Yeasts were detected at 22 of the 23 sampling sites. Levels ranged from 3 to 8,680 cfu/L and were broadly divided into pigmented and non-pigmented yeasts. Pigmented yeasts could potentially be an indication of pollution, while non-pigmented yeasts could potentially be pathogenic species. Levels of yeasts could be statistically associated with some physico-chemical parameters. A large percentage of isolated yeasts could grow at temperatures ranging from 4 to 40 °C. Candida spp., Cryptococcus spp., Rhodotorula spp. and Zygosaccharomyces spp. were identified. Our results provide preliminary information on the distribution and diversity of yeasts in water sources in the North West Province.

scholarly journals Evaluating the Nitrate to Phosphate Ratio and Other Physicochemical Characteristics of Different Water Sources in Yeghe Community, Rivers State, Nigeria

2021 ◽  
pp. 1-9
Author(s):  
S. A. Wemedo ◽  
T. Sampson ◽  
B. Dick
Keyword(s):  
Water Quality ◽  
Water Samples ◽  
Anthropogenic Activities ◽  
Water Sources ◽  
Local Health ◽  
Chemical Parameters ◽  
Data Set ◽  
Significant Difference ◽  
Rivers State ◽  
Different Water Sources

Water quality determination has become essential in characterising the nature of water used by humans for various purposes. This study was therefore carried out to assess the nitrate to phosphate ratio and other physical and chemical parameters influencing the quality of water used for domestic purposes in Yeghe Community, Rivers State, Nigeria. Water samples (from 3 boreholes, 3 river points and 3 wells) were collected randomly for each study period, and subjected to standard laboratory procedures to analyse for parameters such as temperature, pH, nitrate nitrogen, phosphate, total dissolved solid (TDS), dissolved oxygen (DO) and electrical conductivity, using standard procedures. Nutrient limitation in the water sources was evaluated based on critical ratios produced by Redfield, using nitrate and phosphate as limiting nutrients. The nitrate to phosphate ratios indicated that there were more of phosphate limitations in the samples, as only two of the samples showed nitrate limitation, with the well water samples showing no nitrate limitation.  The study also showed that all the physico-chemical parameters were within the WHO limits, except for pH that had values below the regulatory standard. Statistical evaluation of the data showed a significant difference (p < 0.05) between the physicochemical parameters of the different water sources (river, tap and well), except for temperature that recorded no significant difference (p > 0.05). This novel study on physicochemical water quality determinants has provided baseline and reference data set for monitoring the pollution status of the different water sources of this rural community. Local health authorities should however regulate anthropogenic activities around these water sources to ensure the availability of safe for use water sources in this locality.    

scholarly journals Assessment of physico-chemical parameters and trace heavy metal elements from different sources of water in and around institutional campus of Lumami, Nagaland University, India

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Maqbul Hussain ◽  
Latonglila Jamir ◽  
Maibam Romeo Singh
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Drinking Water ◽  
Drinking Water Treatment ◽  
Water Sources ◽  
Permissible Limit ◽  
Chemical Parameters ◽  
Metal Elements ◽  
Physico Chemical ◽  
Heavy Metal Elements

AbstractThe main emphasis of this study was to assess the status of drinking water quality from four different water sources available in and around an institutional campus of Lumami, Nagaland University, with special reference to the detection of trace heavy metal elements. The results of the physico-chemical parameters of the water show that values of DO, BOD5 and free CO2 at S3 are beyond the permissible limit set by WHO and BIS. The values of DO in all the three stations (S1, S2 and S4) are near the maximum permissible limit of drinking water, indicating the deterioration of water quality, whereas the rests of the parameters are below the permissible limit of WHO and BIS. The detection of Hg in all stations along with alarmingly high concentrations of Fe and others such as Cu, Zn, Mn and Se is perceived as a matter of concern. On the other hand, As and Pb were not detected in any station. The detection of Hg and Fe in all the four types of water sources is an indication of contaminant hazards and needs drinking water treatment practices in these areas which in turn have implications on human health.

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