Phosphate uptake by blue green algae in vitro and in a lake during an algal bloom: Useful application of a force-flow relationship

2-Methylisoborneol (MIB) and geosmin produced by blue-green algae were successfully removed in a new gravel filter plant. Small amounts of sludge were sampled from the filter layer and the bacteria able to decompose MIB were isolated from the sludge samples. By-products of the MIB degradation by these bacteria were also investigated. Among these bacteria, efforts were mainly focused on Pseudomonas fluorescens. The components of cell free extracts of this bacterium were studied in order to verify the biological reactions in vitro. 2-Methylenebornane, 2-methyl-2-bornene and isomers of these compounds were found to be a part of the by-products of the MIB degradation in the gravel filter.

Download Full-text

Differential temperature sensitivity of two cladoceran species to resource variation during a blue-green algal bloom

Canadian Journal of Zoology ◽

10.1139/z86-262 ◽

1986 ◽

Vol 64 (8) ◽

pp. 1739-1744 ◽

Cited By ~ 13

Author(s):

Stephen T. Threlkeld

Keyword(s):

Growth Rate ◽

Population Growth ◽

Green Algae ◽

Growth Rates ◽

Algal Bloom ◽

Zooplankton Community Structure ◽

Lake Texoma ◽

Blue Green Algae ◽

Green Algal ◽

First Reproduction

The sensitivity of life-table parameters of two cladoceran zooplankton to slight, natural variations in temperature was determined during the onset of a midsummer blue-green algal bloom in a large turbid reservoir (Lake Texoma, Oklahoma, Texas). Prior to the onset of blue-green algae, cohorts of Ceriodaphnia lacustris incubated at ambient epilimnion temperatures (27–30 °C) had higher individual somatic and population growth rates, an earlier age at first reproduction, and shorter life-spans than cohorts incubated at a constant 25 °C. As blue-green algae became abundant, Ceriodaphnia growth rates were reduced more dramatically at ambient temperatures than at 25 °C, suggesting that a temperature–resource interaction was important to determination of somatic growth rate, age of first reproduction, and population growth rate. Ceriodaphnia populations declined in Lake Texoma as blue-green algae became abundant. Diaphanosoma leuchtenbergianum, which was abundant throughout the period of blue-green algal dominance, did not show the temperature–resource interaction found for Ceriodaphnia. Temperature–resource interactions have been hypothesized to determine seasonal change in zooplankton community structure; this study provides experimental evidence of demographic consequences in natural populations of one kind of common temperature–resource interaction.

Download Full-text

In vitro Culturing and Biochemical properties of Green and Blue-Green Algae in the Laterite soil

Vegetos- An International Journal of Plant Research ◽

10.5958/2229-4473.2018.00089.7 ◽

2018 ◽

Vol 31 (4) ◽

pp. 28

Author(s):

Binoy T. Thomas ◽

M. V. Bhagya ◽

S. T. Saranya Mol ◽

Reshma Rajan

Keyword(s):

Green Algae ◽

Biochemical Properties ◽

Laterite Soil ◽

Blue Green Algae

Download Full-text

Testing for Algal Toxins In Vitro

Alternatives to Laboratory Animals ◽

10.1177/026119298701400315 ◽

1987 ◽

Vol 14 (3) ◽

pp. 172-173

Author(s):

T. Aune

Keyword(s):

Green Algae ◽

Rat Hepatocytes ◽

Freshwater Lakes ◽

Algal Toxins ◽

Blue Green Algae ◽

Marine Dinoflagellates ◽

Toxic Blooms

Toxic blooms of several strains of blue-green algae are found in both natural and man-made freshwater lakes. Furthermore, mussels may accumulate toxic marine dinoflagellates, rendering them toxic to humans. Traditionally, the presence of algal toxins is tested by intraperitoneal injections of extracts in mice. However, toxic waterblooms and mussels can both be detected by means of freshly prepared rat hepatocytes in suspension.

Download Full-text

Influence of Water Temperature and Nitrogen to Phosphorus Ratios on the Dominance of Blue-Green Algae in Lake St. George, Ontario

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f87-073 ◽

1987 ◽

Vol 44 (3) ◽

pp. 598-604 ◽

Cited By ~ 108

Author(s):

D. J. McQueen ◽

D. R. S. Lean

Keyword(s):

Green Algae ◽

Algal Bloom ◽

Inorganic Nitrogen ◽

Data Set ◽

Blue Green Algae ◽

Green Algal ◽

Influence Of Water ◽

Total Inorganic Nitrogen ◽

Explained Variation ◽

Algal Composition

Data collected at Lake St. George, Ontario, over five summers spanning a period of 13 yr showed that there was no correlation between percent blue-green algal composition and the ratio of total nitrogen (TN) to total phosphorus (TP), However, percent blue-green algae was positively correlated with temperature and negatively correlated with nitrate nitrogen (NO3-N), total inorganic nitrogen (TIN), and the ratio of NO3-N:TP. Multiple correlations involving percent blue-green algae (dependent variable) with respect to temperature, in combination with one of NO3-N, TIN, NO3-N:TP, or TIN:TP, were also significant. In all cases, temperature effects accounted for most of the explained variation. The strongest correlation was found for the multiple regression involving percent blue-green algae versus temperature and the NO3-N: TP ratio. The pattern that emerged from the Lake St. George data set was that when temperature exceeded 21 °C and the ratio of NO3-N:TP was below 5:1, the likelihood of a blue-green algal bloom was high. When temperature was below 21 °C and NO3-N:TP exceeded 5:1, blue-green blooms never occurred.

Download Full-text