Toxic Water Bloom of Blue-green Algae: Biological and Chemical Charactereristics.

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.

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Contribution to the ecology of water-bloom-forming blue-green algae — Aphanizomenon flos aquae and Microcystis aeruginosa

SIL Proceedings 1922-2010 ◽

10.1080/03680770.1962.11895612 ◽

1964 ◽

Vol 15 (2) ◽

pp. 837-846 ◽

Cited By ~ 5

Author(s):

J. Hrbáček

Keyword(s):

Microcystis Aeruginosa ◽

Green Algae ◽

Water Bloom ◽

Blue Green Algae

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

Hydrobiological Journal ◽

10.1615/hydrobj.v41.i5.50 ◽

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

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100060386 ◽

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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