EXAMPLES OF NATURAL PHOTOGRAPHY FROM RENFREW COUNTY, ONTARIO

1967 ◽  
Vol 4 (4) ◽  
pp. 619-623 ◽  
Author(s):  
V. A. Saull
Keyword(s):  
Solar Radiation ◽  
Green Algae ◽  
Algal Growth ◽  
Growth Patterns ◽  
Field Site ◽  
Blue Green Algae ◽  
Photographic Records

Blue-green algae grow on water-covered carbonate bedrock in the Bonnechere River 2 miles (3.2 km) northwest of Eganville, Renfrew County, Ontario. The algal growth is sunlight-controlled, and the growth patterns are photographic records of present-day solar radiation at the field site. Equivalent patterns may be identifiable in ancient rocks, and if so, could be used to determine paleodirections, and possibly paleolatitudes as well.

scholarly journals Toxic or Otherwise Harmful Algae and the Built Environment

Toxins ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 465
Author(s):  
Wolfgang Karl Hofbauer
Keyword(s):  
Built Environment ◽  
Green Algae ◽  
Global Climate ◽  
Algal Species ◽  
Algal Growth ◽  
Harmful Algae ◽  
Special Group ◽  
Comprehensive Overview ◽  
Blue Green Algae ◽  
Nature Literature

This article gives a comprehensive overview on potentially harmful algae occurring in the built environment. Man-made structures provide diverse habitats where algae can grow, mainly aerophytic in nature. Literature reveals that algae that is potentially harmful to humans do occur in the anthropogenic environment in the air, on surfaces or in water bodies. Algae may negatively affect humans in different ways: they may be toxic, allergenic and pathogenic to humans or attack human structures. Toxin-producing alga are represented in the built environment mainly by blue green algae (Cyanoprokaryota). In special occasions, other toxic algae may also be involved. Green algae (Chlorophyta) found airborne or growing on manmade surfaces may be allergenic whereas Cyanoprokaryota and other forms may not only be toxic but also allergenic. Pathogenicity is found only in a special group of algae, especially in the genus Prototheca. In addition, rare cases with infections due to algae with green chloroplasts are reported. Algal action may be involved in the biodeterioration of buildings and works of art, which is still discussed controversially. Whereas in many cases the disfigurement of surfaces and even the corrosion of materials is encountered, in other cases a protective effect on the materials is reported. A comprehensive list of 79 taxa of potentially harmful, airborne algae supplemented with their counterparts occurring in the built environment, is given. Due to global climate change, it is not unlikely that the built environment will suffer from more and higher amounts of harmful algal species in the future. Therefore, intensified research in composition, ecophysiology and development of algal growth in the built environment is indicated.

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.  

scholarly journals Analisis Komponen Yield Minyak Mikro Alga Hijau Dengan Medium Detmer

2019 ◽  
Vol 4 (1) ◽  
pp. 457
Author(s):  
Bahagia Bahagia ◽  
Vera Viena
Keyword(s):  
Green Algae ◽  
Co2 Fixation ◽  
Algal Growth ◽  
Growth Patterns ◽  
Green Microalgae ◽  
Phase Component ◽  
Large Intensity ◽  
Significant Difference ◽  
Death Phase ◽  
Modified Media

<p>This study examines CO2 for the growth of green microalgae by cultivating algal strains in a tank type reactor or fermentor. The study included optimization of the productivity of green algae in the capture of CO2 which can be used as a greenhouse gas catcher. Green algae were isolated from several waters in Banda Aceh and Aceh Besar. The microalgae species of this isolation and its identified species were subsequently cultivated in a tank-shaped cultivation (cultivation) container with 4 flourescent lamps (2x8 watts; 4x8 watts) installed on the outside side of the tank. This study evaluated the comparison of the growth of aerated microalgae O2 (1.25 liters / minute) with fixation of CO2 (1 and 2 liters / minute). The capture of CO2 into carbon dioxide  is done by looking at the growing biomass, and the yield content of oil in biomass. The results showed that there were significant differences in the growth patterns of microalgae given O2 aeration and CO2 fixation. Modified &amp; CHU 13 Detmer Modified media does not provide a significant difference to algal growth. With a large intensity of light with a medium that is sufficient to increase the growth of microalgae until it reaches the death phase. Component analysis by Chromatography Gas Mass Spectrometry (GC-MS) shows that the largest component in vegetable oils from green microalgae is Palmatic acid (9.36%), Thiogeraniol (24.63%), Cyclopropane Methanol (2.45%), Farnesol ( 2.39%), Trimethyl (2.78%) and Dodencadien (5.06%).</p><p> </p>

Limnological Effects of the Elimination of Phosphorus from the Wahnbach Reservoir

1982 ◽  
Vol 14 (4-5) ◽  
pp. 397-406 ◽  
Author(s):  
H Bernhardt ◽  
J Clasen
Keyword(s):  
Green Algae ◽  
Total Phosphorus ◽  
Secchi Depth ◽  
Algal Growth ◽  
Phosphorus Compounds ◽  
Phosphorus Concentration ◽  
Annual Average ◽  
Total Phosphorus Concentration ◽  
Blue Green Algae ◽  
N Concentration

The elimination of the phosphorus compounds from the River Wahnbach (100 - 150 µg/l Ptot) at the point where it flows into the Wahnbach Reservoir down to a figure of 5 µg/l Ptot has decreased the total phosphorus concentration in the Wahnbach Reservoir to 8 - 10 µg/l Ptot. As a result of this, the impoundment which had been in an eutrophic state became oligotrophic to mesotrophic within 3 years. The blue-green algae which had been predominant disappeared and diatoms grow again every spring. Algal growth has been reduced to such an extent that the transparency has gone up to a Secchi-depth of 10 m and was 6 m on an annual average. This was solely produced by eliminating phosphorus and without eliminating nitrogen at the same time (the annual average N-concentration of all tributaries was 5 mg/l).

scholarly journals Analisis CO2 Pertumbuhan Mikro Alga Hijau dengan Menggunakan Fermentor dalam Tanki Tertutup

2019 ◽  
Vol 4 (1) ◽  
pp. 464 ◽  
Author(s):  
Bahagia Bahagia ◽  
Vera Viena
Keyword(s):  
Green Algae ◽  
Co2 Fixation ◽  
Algal Growth ◽  
Growth Patterns ◽  
Large Intensity ◽  
Fluorescent Lamps ◽  
Significant Difference ◽  
Death Phase ◽  
Photosynthetic Microorganisms ◽  
Modified Media

<p>Microalgae are photosynthetic microorganisms with varying cell morphology, both unicellular and multicellular (forming small colonies). This research is about CO2 for the growth of green microalgae by cultivating algal strains in tank type reactors or fermenters. The study included optimization of the productivity of green algae in the capture of CO2 which can be used as a greenhouse gas catcher. Green algae were isolated from several waters in Banda Aceh. These microalgae species are isolated and have been identified, then cultivated in irradiated tank containers with 4 fluorescent lamps (2x8 watts; 4x8 watts) installed on the outside of the tank. This study evaluated the comparison of the growth of aerated microalgae O2 (1.25 liters / minute) with fixation of CO2 (1 and 2 liters / minute). Catching CO2 into carbon dioxide by looking at growing biomass, and the yield content of oil in biomass. The results showed that there were significant differences in the growth patterns of microalgae given O2 aeration and CO2 fixation. Modified &amp; CHU 13 Detmer Modified media did not provide a significant difference to algal growth. With a large intensity of light with a medium that is sufficient to increase the growth of microalgae until it reaches the death phase.</p><p> </p>

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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