Blue-green Algal Ammonia Uptake in Hypertrophic Prairie Lakes

1981 ◽  
Vol 38 (9) ◽  
pp. 1040-1044 ◽  
Author(s):  
T. P. Murphy ◽  
B. G. Brownlee
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Nitrogen Cycle ◽  
Nitrogen Limitation ◽  
Kinetic Studies ◽  
Blue Green Algae ◽  
Ammonia Uptake ◽  
Green Algal ◽  
Prairie Lakes ◽  
Menten Kinetic

Within 24 h of an increase in lake [Formula: see text] concentration, [Formula: see text] uptake by Aphanizomenon flos-aquae and Microcystis aeruginosa increases much beyond the capacity predicted by Michaelis–Menten kinetic studies. In hypertrophic lakes this response enables these blue-green algae to optimize ammonia uptake during large oscillations of [Formula: see text] concentration, to aid them in competing with other algae, and to conserve [Formula: see text] within the ecosystem. Nitrogen limitation in the hypertrophic prairie lakes is a rare event.Key words: ammonia uptake, prairie lakes, nitrogen limitation, nitrogen cycle

Ammonia Volatilization in a Hypertrophic Prairie Lake

1981 ◽  
Vol 38 (9) ◽  
pp. 1035-1039 ◽  
Author(s):  
T. P. Murphy ◽  
B. G. Brownlee
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Cycle ◽  
Nitrogen Limitation ◽  
Ammonia Volatilization ◽  
Algal Bloom ◽  
Lake Surface ◽  
High Ph ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Prairie Lakes

During two periods of high pH and high ammonia concentrations, disappearance rates of ammonia of 20–30 μg N∙L−1∙h−1 were observed in Lake 885, a hypertrophic prairie lake. At these times, rates of ammonia uptake by phytoplankton were 2.6–4.3 μg N∙L−1∙h−1 as measured by a 15N method. The high excess rates of ammonia disappearance are best explained by volatilization of ammonia from the lake surface. The loss of ammonia induced nitrogen fixation; however, much larger quantities of ammonia were lost via ammonia volatilization after algal bloom collapsed than the algae could fix in one season.Key words: ammonia volatilization, prairie lakes, nitrogen limitation, nitrogen cycle

scholarly journals PHARMACEUTICAL POTENTIAL OF LABORATORY GROWN CULTURES OF BLUE-GREEN ALGAE: A COMPREHENSIVE REVIEW AND FUTURE POSSIBILITIES

2021 ◽  
Vol 9 (5) ◽  
pp. 543-571
Author(s):  
Ritu Chauhan ◽  
◽  
Abhishek Chauhan ◽  
Ashutosh Tripathi ◽  
Anuj Ranjan ◽  
...  
Keyword(s):  
Green Algae ◽  
Bioactive Compounds ◽  
Current Knowledge ◽  
Biological Activities ◽  
Biologically Active ◽  
Primary And Secondary Metabolites ◽  
Blue Green Algae ◽  
Green Algal ◽  
Algal Group ◽  
Diverse Application

COVID-19 pandemic has taught the world researchers the urgent need for new sources and novel pharmaceuticals not only for existing diseases but also for both seasonal epidemics and future pandemics. Pharmaceutical drug discoveries for the past fifty years depended deeply on the procedure of empirical transmission of a huge number of pure bioactive compounds to provide new leads. The screening of extracts or isolating compounds is a common way to discover novel biologically active molecules. Most of the valuable Blue-Green algal metabolites are concentrated in their biomass. For existence in nature, Blue-Green algae (BGA) secrete and contain various organic substances like proteins, fatty acids, vitamins, pigments, primary and secondary metabolites, and these compounds are explored for potential biological activities such as antibacterial, antifungal, antiviral (including the anti-SARS-CoV-2 virus that causes COVID-19), anticancer, antioxidant, antidiabetic, protease inhibitory activity, anti-inflammatory activity, etc. Due to their diverse application, pharmaceutical companies have shown commercial interest in the Blue-green algal group for the discovery and development of novel molecules to combat deadly diseases for the benefit of society and mankind. The current review paper highlights and discusses the diverse pharmaceutical potential of laboratory-grown cultures of BGA along with comprehensive and current knowledge on bioactive compounds discovered by researchers globally.

Volatile Compounds of the Cyanophyceae – A Review

1983 ◽  
Vol 15 (6-7) ◽  
pp. 181-190 ◽  
Author(s):  
George P Slater ◽  
Vivian C Blok
Keyword(s):  
Fatty Acids ◽  
Volatile Compounds ◽  
Organic Compounds ◽  
Green Algae ◽  
Aquatic Organisms ◽  
Blue Green Algae ◽  
Green Algal

A relationship between blue-green algae and off-flavours in water was reported as early as 1883. Continuing research has shown that two metabolites, geosmin and methylisoborneol are major contributors to unpalatable flavours in water and aquatic organisms. Many instances of the co-occurrence of these two compounds and dense blooms of blue-green algae have been recorded. Cultures of Anabaena, Lyngbya, Osciiiatoria, and Sympioca species have been shown to produce geosmin or methylisoborneol while blooms of Aphanizomenon, Anabaena, Microcystis, Oscillatoria, and Gomphosphaeria have been found in water containing geosmin or the odour of this compound. Actinomycetes have also been shown to produce these two compounds. In addition to geosmin and methylisoborneol, there is evidence that several other blue-green algal metabolites contribute to aquatic taste and odour problems. Among them is β-cyclocitral which has a distinctive tobacco flavour. Blue-green algae produce a variety of organic compounds including hydrocarbons, fatty acids, aromatics, ketones, terpenoids, amines and Sulfides which could contribute to the over-all flavour of water and aquatic organisms.

A partial structure for the toxin BE-4 from the blue-green algae, Microcystis aeruginosa

1983 ◽  
pp. 652 ◽  
Author(s):  
Sitthivet Santikarn ◽  
Dudley H. Williams ◽  
Richard J. Smith ◽  
Stephen J. Hammond ◽  
Dawie P. Botes ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Partial Structure ◽  
Blue Green Algae

scholarly journals Carbamate, Organophosphate and Organochlorine Pesticidal Effect on the Qualitative Occurrence and Survivability of Blue-green Algae

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Ganesh S. Shinde
Keyword(s):  
Green Algae ◽  
Culture Media ◽  
Pesticide Application ◽  
Blue Green Algae ◽  
Crop Fields ◽  
Survival Percentage ◽  
Green Algal ◽  
Control Plate ◽  
Total Productivity ◽  
Stock Solutions

Blue-green algae make a valuable contribution to the nitrogenous soil fertility by fixing atmospheric nitrogen and are of great agricultural importance as biofertilizer. Four commercial grade pesticides, Carbamate, Furadan and Sevin and Organophosphate, Rogor and Organochlorine, Endotaf were used to study their effect on the survivability and qualitative occurrence of blue-green algae by taking survival on the control plate as 100%. Stock solutions of these pesticides were prepared freshly for experiments in the sterilized BG-11 media and added to the culture media to obtain the desired concentrations of 100, 250, 500 and 1000 ppm. After 30 days of incubation, the blue-green algal forms appeared in the culture flask were identified using standard monographs. The pragmatic results indicated that, soil blue-green algae show variable resistance to pesticide treatments. The survival percentage of the tested blue-green algae was reduced upto 50 percent at 500 ppm of carbamate pesticides, Furadan and Sevin. While with Rogor only 10.52% and Endotaf 5.26% survivability was noticed at 500 ppm dose level. Furthermore, the organochlorine pesticide Endotaf was more toxic than the organophosphate, Rogor and the carbamates, Sevin and Furadan in sequence to the blue-green algae. It was cocluded that higher doses of pesticide application in the crop fields i.e. more than 100 ppm of Furadan, Sevin and Rogor and even at 100 ppm of Endotaf, qualitative and quantitative occurrence of heterocystous and non- heterocystous blue-green algae was decreased considerably. This suggests that, indiscriminate use of these pesticides may cause adverse effects on the nitrogen fixing blue-green algae of various crop fields, which has a direct influence on total productivity. In general, the sensitiveness of different blue-green algae to pesticide application was found to be more in sheathless heterocystous and unicellular forms than the heterocystous ensheathed and non- heterocystous ensheathed forms.

scholarly journals Chroococcalean blue green algae from the paddy fields of Satara District, Maharashtra, India

2020 ◽  
Vol 12 (14) ◽  
pp. 16979-16992
Author(s):  
Sharada Jagannath Ghadage ◽  
Vaneeta Chandrashekhar Karande
Keyword(s):  
Green Algae ◽  
Polar Region ◽  
Species Abundance ◽  
Algal Growth ◽  
Wide Distribution ◽  
Paddy Fields ◽  
Study Region ◽  
Blue Green Algae ◽  
Green Algal ◽  
The Family

Blue green algae are the photosynthetic prokaryotes representing a wide distribution in habitat, i.e., temperate, tropical, and polar region.  Paddy fields are the best studied aquatic ecosystems on earth which fulfill all the necessary demands required for blue green algal growth.  Blue green algal role in enhancement of paddy yield has been studied worldwide.  Sustainable utilization of an organism for community use depends on how successfully the ecology of that organism is understood.  Twenty-eight chroococcalean blue green algal taxa were recorded from the study area.  They were taxonomically investigated and found to belong to two families and 11 genera.   The first family Chroococcaceae was the largest family with 10 genera and 26 species while the second family Entophysalidaceae had only one genus and two species.  The genus Gloeocapsa from the family Chroococcaceae exhibited largest species diversity (21.42%), as well as taxa Chlorogloea fritschii of family Entophysalidaceae showed species abundance from the study area.  All heterocystous blue green algal forms are capable of fixation of atmospheric N2.  Many of the non-heterocystous or unicellular blue green algae also have the capacity of N2 fixation.  The taxonomical documentation of chroococcalean blue green algae provide information about such indigenous unicellular blue green algae which will help in the development of niche specific inoculants as biofertilizers for rice fields of the study region.  

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

1986 ◽  
Vol 64 (8) ◽  
pp. 1739-1744 ◽  
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.

Occurrence of Toxin Producing Cyanobacteria in Hungary. Isolation, Separation and Identification of Microcystins

1997 ◽  
Vol 52 (1) ◽  
pp. 107-109 ◽  
Author(s):  
Gerhard G. Habermehl ◽  
Hans Chr. Krebs ◽  
Péter Nemes ◽  
Gábor Nagy ◽  
Pál Scheiber
Keyword(s):  
Toxic Effect ◽  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Mass Spectroscopy ◽  
Blue Green Algae ◽  
Cell Material ◽  
Toxin Content ◽  
Dry Cell

Cyanobacteria (blue-green algae), Microcystis aeruginosa sp., were isolated from a massive bloom in a eutrophic waterbody in Hungary. Their toxic effect, determined by a mouse test, was associated with the occurrence of microcystins YR and LR which were isolated, separated by means of HPLC procedures and identified by mass spectroscopy. The toxin content of the dry cell material is about 0.22 %, indicating a pronounced toxin-producing ability of the species investigated

Sign in / Sign up

Export Citation Format

Share Document