scholarly journals НАУКОВЕ ОБҐРУНТУВАННЯ ТА РОЗРОБКА ЗАХОДІВ БОРОТЬБИ З ЕВТРОФІКАЦІЄЮ

2012 ◽  
pp. 185-188
Author(s):  
Н. І. Авраменко
Keyword(s):  
Green Algae ◽  
Optimal Conditions ◽  
Blue Green Algae ◽  
Main Factors ◽  
The Impact

Розглядаються основні чинники, які дадуть змогузнизити чисельність синьо-зелених водоростей –головних збудників процесу евтрофікації. Встанов-лено інтенсивність процесу евтрофікації води врічці Ворскла. Визначено оптимальні умови длярозвитку ціанобактерій. Наведено результатидосліджень із вивчення впливу різних хімічних ре-човин на розмноження мікроорганізмів. Охаракте-ризовано евтрофікаційні процеси річки Ворскла, зякої проводився збір агроекологічної інформації;вказано кількісний склад синьо-зелених водорос-тей. Розроблено заходи боротьби з процесамиевтрофікації води в річці Ворскла. The main factors that help to reduce the number of bluegreenalgae are considered. The intensity of the processof eutrophication of water in the river Vorskla has beenestablished. The optimal conditions for cyanobacteriahave been determined. The results of studies on examinationof the impact of various chemicals on the reproductionof microorganisms have been presented. Eutrophicationprocesses of the Vorskla River from whichagroecological information was collected have been characterised.The number of blue-green algae has been specified.The measures on control of eutrophication processof water in the river Vorskla have been developed.

The Impact of Industrial Shock Loading on Selected Biocoenoses in the Lower Welland River, Ontario

1980 ◽  
Vol 15 (1) ◽  
pp. 17-32 ◽  
Author(s):  
M. Dickman ◽  
J. Smol ◽  
P. Steele
Keyword(s):  
Green Algae ◽  
Shock Loading ◽  
Inorganic Compounds ◽  
Specific Conductivity ◽  
Fish Population ◽  
Upstream Site ◽  
Blue Green Algae ◽  
North Shore ◽  
The North ◽  
The Impact

Abstract A baseline for biological and chemical water quality conditions was established for a section of the Welland River which daily receives large quantities of nitrogenous and carbonaceous inorganic compounds from Cyanamid of Canada Limited. Specific conductivity transects across the river at various locations indicated that the effluents discharged clung to the north shore of the River. In addition, simultaneous continuous conductivity measurements from above and below the plant were made during five one-week long periods and the results temperature corrected. At the upstream site conductivity never exceeded 400 limhos/cm while below the plant it averaged 950 umhos/cm with sporadic peaks exceeding 1 0,000 umhos/cm. Epiphytic diatoms scraped from typha stalks growing in the water at sites above the plant were dominated by Nitzschia dissipata, while the pollution tolerant diatom, Nitzschia palea, dominated at the majority of the downstream sites. In addition, blue green algae replaced filamentous green algae below the plant. Higher aquatic plants reflected a very distinctive zonation pattern. No higher aquatics were found growing in the water in the impact zones immediately below the effluent outfalls. The first macrophytes to appear downstream of these sites were cattails, while further downstream the arrowheads (sagittaria) and later the submersed macrophytes, such as Elodea and Myriophyllum appeared. No resident fish population occurred along the north shore downstream of the plant. Shiners and other small transient fish species which were observed entering the effluent plume near Thompson's Creek during periods of shock loading went "belly-up" within one minute indicating the extreme toxicity of these waters.

scholarly journals Impact of Some Natural Extracts and Nutrients on Different Growth Measurements of Washington Navel Orange Transplants

2020 ◽  
pp. 28-46
Author(s):  
M. N. A. Al- Sabbagh ◽  
H. E. M. El- Badawy ◽  
M. H. M. Baiea ◽  
S. F. El- Gioushy
Keyword(s):  
Green Algae ◽  
Yeast Extract ◽  
Growth Parameters ◽  
Foliar Spray ◽  
Navel Orange ◽  
Blue Green Algae ◽  
Commercial Grade ◽  
Natural Extracts ◽  
Washington Navel ◽  
The Impact

This study was conducted throughout the two successive seasons of 2018 and 2019 at Fruit Nursery of Horticulture Department, Faculty of Agriculture at Moshtohor, Benha University Qalubia Governorate, Egypt., to study the impact of some natural treatments, i.e., Algae, Yeast extract, Moringa leaves extract and nutrients as compound that containing both macro (N, P, K) and micro (Fe, Zn, Mn, Fe, Cu) elements and compound containing macro and microelements and some growth regulators. These materials (natural extracts and nutrients) were applied as a foliar spray at different concentrations to evaluate their effect on different growth parameters of one year old Washington navel orange transplants budded on sour orange rootstock. These materials were applied once in a month started from the last week in April to the last week in September .as per the treatment as: Blue-green algae extract (1, 2 and 3 ml/L), Yeast extract (10, 20 and 30 ml/L), Moringa leaves extract (2.5, 5 and 7.5 g/L). Nitro active 20: 20: 20 (commercial grade) (0.5, 1 and 1.5 g/L) and Estima green (commercial grade) (0.5, 1 and 1.5 g/L). The result indicated that the application of Blue-green algae at 3 ml/L  and Estima green at  0.5g/L cause a significant increase in the different growth parameters under this study i.e.,  length, diameter, number of leaves, leaf area, fresh and dry weights. On the contrary, the least values of the abovementioned parameters were usually in concomitant to T1 - control (water sprayed) which ranked statistically last during both seasons of study.

scholarly journals Using of Index Biological Integrity of Phytoplankton (P-IBI) in the Assessment of Water Quality in Don River Section

2021 ◽  
Vol 18 (1) ◽  
pp. 0087
Author(s):  
E.N Bakaeva ◽  
Murooj Abbas Buhlool Al-Ghizzi ◽  
Zahraa Aljanabi
Keyword(s):  
Water Quality ◽  
Green Algae ◽  
Poor Quality ◽  
Total Biomass ◽  
Biological Integrity ◽  
Index Of Biological Integrity ◽  
Entire Study ◽  
Blue Green Algae ◽  
Don River ◽  
The Impact

       The multimetric Phytoplankton Index of Biological Integrity (P-IBI) was applied throughout Rostov on Don city (Russia) on 8 Locations in Don River from April – October 2019. The P-IBI is composed from seven metrics: Species Richness Index (SRI), Density of Phytoplankton and total biomass of phytoplankton and Relative Abundance (RA) for blue-green Algae, Green Algae, Bacillariophyceae and Euglenaphyceae Algae. The average P-IBI values fell within the range of (45.09-52.4). Therefore, water throughout the entire study area was characterized by the equally "poor" quality. Negative points of anthropogenic impact detected at the stations are: Above the city of Rostov-on-Don (1 km, higher duct Aksai) was 38.57 in June, the lower inflow of the Temernik river  which was 38.57- 41.42 in summer and below the spillway was 38.57 -34.28 in August. At these stations, samples with P-IBI values more than 56, characterizing water quality as "Fair", were not found in any of the observations. The negative effect on the water at the stations may be due to the influence of the closely located Aksai city and the impact of the Temernik River. In Russia P-IBI have not been used yet, so this study can be considered as the first study that’s conducted to assess the environmental status of the Don River by using the phytoplankton index of Biological Integrity and has developed scoring criteria of the Don River (P-IBI) and other watercourses of the south of Russia. The continuous monitoring relaying on the selection of the most suitable metrics score is recommended.

Freeze-Fracture Replication in the Ultrastructure of Blue-Green Algae

1967 ◽  
Vol 25 ◽  
pp. 74-75
Author(s):  
L. V. Leak
Keyword(s):  
Cell Wall ◽  
Electron Microscope ◽  
Green Algae ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Electron Microscopic ◽  
Photosynthetic Membranes ◽  
Blue Green Algae ◽  
Cell Biol ◽  
Cellular Components

Electron microscopic observations of freeze-fracture replicas of Anabaena cells obtained by the procedures described by Bullivant and Ames (J. Cell Biol., 1966) indicate that the frozen cells are fractured in many different planes. This fracturing or cleaving along various planes allows one to gain a three dimensional relation of the cellular components as a result of such a manipulation. When replicas that are obtained by the freeze-fracture method are observed in the electron microscope, cross fractures of the cell wall and membranes that comprise the photosynthetic lamellae are apparent as demonstrated in Figures 1 & 2.A large portion of the Anabaena cell is composed of undulating layers of cytoplasm that are bounded by unit membranes that comprise the photosynthetic membranes. The adjoining layers of cytoplasm are closely apposed to each other to form the photosynthetic lamellae. Occassionally the adjacent layers of cytoplasm are separated by an interspace that may vary in widths of up to several 100 mu to form intralamellar vesicles.

New constituents from Oryza sativa L. straw and their algicidal activities against blue-green algae

2017 ◽  
Vol 40 (1) ◽  
pp. 47-62 ◽  
Author(s):  
I. M. Chung ◽  
S. H. Kim ◽  
Y.T. Oh ◽  
M. Ali ◽  
A. Ahmad
Keyword(s):  
Oryza Sativa ◽  
Green Algae ◽  
Oryza Sativa L ◽  
Blue Green Algae
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