Metabolic Mechanisms of Relationship between Higher Aquatic Plants and Water Bloom Forming Blue-Green Algae

2005 ◽  
Vol 41 (5) ◽  
pp. 43-55
Author(s):  
V. D. Romanenko ◽  
O. M. Usenko ◽  
A. I. Sakevich
Keyword(s):  
Green Algae ◽  
Aquatic Plants ◽  
Water Bloom ◽  
Blue Green Algae ◽  
Higher Aquatic Plants

Vertical profile of algal distribution during aeration prior to intake tower for safe drinking water

2007 ◽  
Vol 55 (1-2) ◽  
pp. 321-327 ◽  
Author(s):  
H.K. Kim ◽  
J.M. Kim ◽  
Y.J. Lee ◽  
B.I. Kim ◽  
B.C. Lee ◽  
...  
Keyword(s):  
Drinking Water ◽  
Green Algae ◽  
Vertical Profile ◽  
Water Bloom ◽  
Safe Drinking Water ◽  
Blue Green Algae ◽  
Natural Toxins ◽  
Dam Site ◽  
The Vertical Distribution ◽  
Algal Distribution

Blue-green algae or cyanobacteria comprise a diverse group of organisms, all of which generate potent natural toxins, as well as characteristic odours. In particular, blue-green algae, such as Microcystis and Anabaena, are often detected abundantly in surface water used as a drinking water resource. In order to confirm our ability to provide safe drinking water even during a water bloom, we have conducted an investigation into the vertical distribution of algae during aeration prior to entry into the intake tower at a dam site. Our analysis of the vertical algal distribution during aeration indicated that aeration occurring at the intake tower exerts a significant influence on the safety of the drinking water. It was determined that the discontinuation of aeration and an increase in the depth at which water intake is conducted, constitutes a viable strategy for the maintenance of toxin- and odour-free drinking water, particularly during water bloom events.

scholarly journals Light Penetration into Fresh Water

1934 ◽  
Vol 11 (1) ◽  
pp. 89-93
Author(s):  
W. H. PEARSALL ◽  
PHILIP ULLYOTT
Keyword(s):  
Light Intensity ◽  
Fresh Water ◽  
Green Algae ◽  
Aquatic Plants ◽  
Submerged Vegetation ◽  
Light Penetration ◽  
Blue Green Algae

1. The penetration of light into Windermere is dependent chiefly on the numbers of phytoplankton organisms in the epilimnion. 2. It appears that the greatest depth at which rooted aquatic plants can grow must therefore be affected by the abundance of phytoplankton. The rooted plants are most active during July and August. Observations show that at this time the presence of blue-green algae reduces the light intensity at the limit of submerged vegetation (4·3 metres) by more than 50 per cent.

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.

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