The relationship between musty-odor-causing organisms and water quality in Lake Biwa

1995 ◽  
Vol 31 (11) ◽  
pp. 153-158 ◽  
Author(s):  
M. Kajino ◽  
K. Sakamoto
Keyword(s):  
Water Quality ◽  
Data Analysis ◽  
Green Algae ◽  
Analytical Methods ◽  
Lake Biwa ◽  
Blue Green Algae ◽  
Odor Compounds ◽  
Musty Odor ◽  
The Relationship

Musty odor has occurred annually in Lake Biwa since 1969. Osaka municipal waterworks, which is located downstream of Lake Biwa, has made many efforts to treat musty-odor compounds produced in Lake Biwa from spring through autumn. With the development of analytical methods for the determination of musty-odor compounds, we have been able to confirm that planktonic blue-green algae are the major causes of the musty-odor occurrences. The relationship between the growth of blue-green algae and the water quality was not so apparent. However, through our data analysis focusing on the relationship between musty-odor occurrences due to Phormidium tenue or Oscillatoria tenuis and some nutrients in Lake Biwa, we found that the concentration of nitrate in water may be an important parameter for the estimation of growth of the algae and the musty-odor behavior.

Earthy-Musty Odor-Producing Cyanophytes Isolated from Five Water Areas in Tokyo

1988 ◽  
Vol 20 (8-9) ◽  
pp. 179-183 ◽  
Author(s):  
A. Matsumoto ◽  
Y. Tsuchiya
Keyword(s):  
Green Algae ◽  
Air Conditioning ◽  
Cooling Tower ◽  
Blue Green Algae ◽  
Odor Compounds ◽  
Musty Odor

Two kinds of 2-methylisoborneol-producing blue-green algae, Oscillatoriageminata and O.limnetica, and three kinds of geosmin-producing algae, O.amoena, O.splendida, and Aphanizomenonflos-aquae, were isolated from a park pond, a fish-cultivation pond, a river, and a reservoir. An oscillatorian species isolated from an air conditioning cooling tower was shown to yield both 2-methylisoborneol and geosmin simultaneously. Care was taken to ensure that the blue-green algae identified were those responsible for the musty odor compounds.

Blue-Green Algae in Lake Biwa Which Produce Earthy-Musty Odors

1988 ◽  
Vol 20 (8-9) ◽  
pp. 117-123 ◽  
Author(s):  
T. Negoro ◽  
M. Ando ◽  
N. Ichikawa
Keyword(s):  
Water Supply ◽  
Green Algae ◽  
Lake Biwa ◽  
Supply System ◽  
Surrounding Water ◽  
Blue Green Algae ◽  
Kyoto City ◽  
Off Flavors ◽  
Musty Odor ◽  
Odorous Compounds

Since 1969, earthy-musty odor problems have frequently occurred in the water supply system of Kyoto City. Though the causes of these off-flavors were identified as 2-methylisoborneol (MIB) and geosmln, the causative organisms were not identified until recently. Now three species of planktonic blue-green algae from Lake Biwa have been identified as playing important roles in such problems. From the unlalgal culture of each alga, Anabaenamacrospora Klebahn was shown to produce geosmln, and both Phormidiumtenue (Meneghini) Gomont and Oscillatoriatenuis Agardh to produce MIB. These odorous compounds were found to be mainly stored in trlchomes, although it was once thought that they were dissolved in the surrounding water. Therefore, most of the odorous compounds can be removed from the water when the causative algae are removed.

scholarly journals The influence of forest-forming tree species on diversity and spatial distribution of algae in forest litter

2018 ◽  
Vol 45 (2) ◽  
pp. 72-81 ◽  
Author(s):  
Yevhen Maltsev ◽  
Irina Maltseva
Keyword(s):  
Species Richness ◽  
Leaf Litter ◽  
Green Algae ◽  
Tree Species ◽  
Spatial Organization ◽  
Forest Litter ◽  
Equal Distribution ◽  
Blue Green Algae ◽  
Different Types ◽  
The Relationship

Abstract The forest litter plays a significant role in forest ecosystems. The composition of the litter biota comprises micro- and mesofauna, and a great diversity of microorganisms, including unrecognized algae (eukaryotic representatives and Cyanoprokaryota). The aim of this work was to study the diversity of algae in the different types of forest litters and to clarify the relationship between the algae composition and the forest-forming tree species. Our results show that the pine forest litter is the most appropriate habitat for the development of green and yellow-green algae and that this litter type limits the variety of blue-green ones. The admixture of deciduous leaf litter to pine litter caused an increase in the species richness of blue-green algae and diatoms. The algae were unevenly distributed across the sub-horizons of pine litter. The highest species richness of algae was identified in the enzymatic sub-horizon of litter. The peculiarity of the composition of leaf litter algae was a significant variety of green, yellow-green and blue-green algae. The spatial organization of algae communities in the leaf litter was characterized by equal distribution of algae species in the litter-subhorizons.

Creativity Thinks on the Significances of Geobiology about the Coal Series

2014 ◽  
Vol 1065-1069 ◽  
pp. 114-118
Author(s):  
Shuo Fu Tian ◽  
Chao Jin Lu ◽  
Yuan Wang
Keyword(s):  
Green Algae ◽  
Higher Plants ◽  
The Other ◽  
Coal Bed ◽  
Geologic History ◽  
Blue Green Algae ◽  
Living Things ◽  
Coal Petrology ◽  
The Relationship ◽  
Lower Plants

It is the components, living things evolution processes, development environments, distribution layers and the earliest time for coal series formation that are investigated and studied in detail based on the author’s graduation thesis, the “Geobiology” , the “China coal petrology” and the other’s some references in this paper. And it is considered that mainly two types of the Coal Series might be distinguish in the geologic history in China, respectively consisted of the lower organisms (especially the lower plants, blue-green algae) and higher organisms (especially the higher plants, pteridophyta, gymnosperms, Anthophyta). Meanwhile, the conclusions can be drawn that the development of the organisms is not only controlled by the environments, on the other hand, the environments and their sediments are also affected by the ecologies of the organisms. So the coal bed or coal series can be used as the marks of the environment explanation, perhaps having some Significances of Geobiology. In additional, the relationship with an unconformity or disconformity is discussed here, too.

scholarly journals A modelling approach to simulate Chlorophyta and Cyanobacteria biomasses based on historical data of a Brazilian urban reservoir

2021 ◽  
Vol 16 (5) ◽  
pp. 1
Author(s):  
Carolina Cerqueira Barbosa ◽  
Lenora Nunes Ludolf Gomes ◽  
Ricardo Tezini Minoti
Keyword(s):  
Water Quality ◽  
Green Algae ◽  
Historical Data ◽  
Cyanobacterial Bloom ◽  
Bottom Layer ◽  
Blue Green Algae ◽  
Water Quality Deterioration ◽  
Good Agreement ◽  
Modelling Approach ◽  
Phytoplankton Group

A process-based model was used to simulate a hindcast based on the worst historical water quality condition of a tropical urban reservoir. Paranoá Lake is located in Brasília-DF, Brazil, and went through intense eutrophication in the 70s and 90s, with an important cyanobacterial bloom event in 1978. The parameters of phytoplankton were calibrated, focusing on the group of Chlorophyta (green algae) and Cyanobacteria (blue-green algae) at four depths (1, 10, 15 and 20m). The results indicated that the model was able to reproduce the Cyanobacteria biomass in comparison with the observations (RMSE=22-29.10-3 mgC L-1). On the other hand, the simulated Chlorophyta biomass showed good agreement with the observed data only in the bottom layer (RMSE=29. 10-3 mgC L-1 at 20m). In the hindcast simulation, the model was able to predict a significant increase in cyanobacterial biomass facing a water quality deterioration. In the meantime, the simulated Chlorophyta biomass decreased, which may indicate the phytoplankton group succession in response to the environmental conditions.

scholarly journals The Effect of Intelligence Quotient and Emotional Quotient on Employee Performance at Pt. Karna Titian Sejahtera Denpasar

2019 ◽  
Vol 10 (02) ◽  
pp. 21401-21407
Author(s):  
Sapta Rini Widyawati ◽  
Ni Ketut Karwini
Keyword(s):  
Data Analysis ◽  
Linear Regression ◽  
Intelligence Quotient ◽  
Employee Performance ◽  
Multiple Correlation ◽  
Emotional Quotient ◽  
Analysis Technique ◽  
Performance Intelligence Quotient ◽  
The Relationship

The purpose of this study was to determine the effect of intelligence quotient and emotional quotient on employee performance at PT. Karna Titian Sejahtera Denpasar. The design of this study is causal research which investigates the relationship between variables, which are independent the variables are intelligence quotient (X1) and emotional quotient (X2) and k inerja employees (Y) as the dependent variable. Determination of the sample in this study using a census, which is if all members of the population as many as 34 people used as samples. Data analysis using SPSS V.23 software . The analysis technique used is multiple linear regression, multiple correlation, determination, t test and F test. The result is that intelligence quotient has a positive and significant effect on employee performance, emotional quotient has a positive and significant effect on employee performance, intelligence quotient and emotional quotient simultaneously have a positive and significant effect on employee performance at PT. Karna Titian Sejahtera Denpasar.

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