Assessment of small water bodies Sergiev Posad district on the taxonomic diversity of green, blue-green and diatom algae

2021 ◽  
pp. 18-32
Author(s):  
Alexander Viacheslavovich Gorbunov ◽  
Oleg Viacheslavovich Gorbunov ◽  
Nikita Il’ich Kochetkov ◽  
Dmitry Lvovich Nikiforov-Nikishin
Keyword(s):  
Species Diversity ◽  
Green Algae ◽  
Water Environment ◽  
Taxonomic Diversity ◽  
Systematic Position ◽  
Taxonomic Composition ◽  
Algal Flora ◽  
Frequency Of Occurrence ◽  
Large Species ◽  
Blue Green Algae

The purpose of the study was to determine the degree of saprobity of the artificial extension of the Vytravki riverbed (left tributary of the Dubna river) in the Sergiev Posad district of the Moscow region, based on the taxonomic composition of the pelagial and littoral algal flora. For this purpose, the systematic position of algae was determined using a number of domestic and foreign sources, as well as using the electronic database AlgaeBase. The most attention was paid to common indicator types, according to the literature data. Algological samples were taken in accordance with generally accepted methods; the main part of the samples was processed immediately after collection on site, the rest of the material was fixed with a formalin solution and Prat medium for detailed study in laboratory conditions under a microscope. According to the results of the study of hydrobiological samples, the composition of algal flora in the summer-autumn period was determined. There is a large species diversity of algae, represented by most of the divisions characteristic of the Central part of Russia. The green, diatomaceous, and blue-green algae divisions were the most represented. Maximum species diversity was observed for the genera Scenedesmus (9 species) and Pediastrum (10 species). Diatoms are the second group in terms of frequency of occurrence of species that live both in standing water and in rheophilic conditions. Blue-green algae were represented by pelagic forms, with a small frequency of occurrence. Among them, the genera Anabaena (5 species) and Microcystis (3 species) are notable for their high species diversity. The algal flora of the pond was marked divisions, dinophyceae and kropotova, typical for oligotrophic and distrophic reservoirs, indicating a high quality water environment. The established hydrochemical parameters of the reservoir were normal and were similar to the reservoirs of Central Russia at the end of the growing season, which were not exposed to anthropogenic impact.

Reduced diversity and productivity of diatoms and other protists during the Early Holocene in the subarctic North Pacific

2020 ◽  
Author(s):  
Heike H. Zimmermann ◽  
Stefan Kruse ◽  
Kathleen R. Stoof-Leichsenring ◽  
Luise Schulte ◽  
Dirk Nürnberg ◽  
...  
Keyword(s):  
Green Algae ◽  
Taxonomic Diversity ◽  
Taxonomic Composition ◽  
Shotgun Sequencing ◽  
Early Holocene ◽  
The Past ◽  
Subarctic North Pacific ◽  
Morphological Differences ◽  
Marine Protists

<p>Marine protists are a phylogenetically diverse group of single-celled eukaryotes that respond sensitively to changes in environmental conditions. Yet, our understanding how long-term climate variability has shaped the taxonomic composition is mostly unknown, especially of non-biomineralizing groups, such as green algae, since traditional micropaleontological studies are limited to the analysis of microfossil remains with often hardly discernable morphological differences between species (e.g. diatoms). Here we present a sedimentary ancient DNA (<em>sed</em>aDNA) record of the marine sediment core SO201-2-12KL, which was retrieved from the eastern continental slope of Kamchatka at 2173 m water depth (N 53.992660°, E 162.375830°) and covers the past 19.9 thousand years. We applied <em>sed</em>aDNA metabarcoding to 63 samples using a diatom-specific, short plastid marker that is part of the <em>rbcL</em> gene. Additionally, we used metagenomic shotgun sequencing on a subset of 26 samples to investigate the overall taxonomic composition of protists. Metagenomic shotgun sequencing revealed a variety of unicellular plankton groups mostly from green algae (especially <em>Bathycoccus</em>) and diatoms. At 11.1 cal kyr BP only single sequences assigned to green algae, diatoms and coccolithophorids could be detected. Metabarcoding showed strong variability in the richness of diatom sequence variants, which was highest during Heinrich Stadial 1 and the Younger Dryas. From about 11.4 cal kyr BP diatom taxonomic diversity strongly decreased until about 10.7 cal kyr BP. This was associated with highest taxonomic and phylogenetic turnover recorded over the past 19.9 cal kyr. Concomitant with this we recorded sequences assigned to <em>Skeletonema</em> <em>subsalsum</em>, a coastal diatom associated with low salinities or freshwater. Tentatively, as we wait for the confirmation by further sequencing, we suggest that the reduced protist diversity during the Early Holocene resulted from sea surface freshening, which led to a strengthened vertical stratification which could have reduced past productivity due to limited nutrient supply from deeper waters to the photic zone.</p>

Algal Communities as a Biological Indicator of Stormwater Management Pond Performance and Function

2000 ◽  
Vol 35 (3) ◽  
pp. 489-504 ◽  
Author(s):  
Daniel D. Olding
Keyword(s):  
Green Algae ◽  
Stormwater Management ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Biological Indicator ◽  
Taxonomic Composition ◽  
Algal Community ◽  
Algal Communities ◽  
Blue Green Algae ◽  
Biological Communities

Abstract An investigation into phytoplankton and periphyton algal communities of two recently constructed Stormwater management ponds suggests that Stormwater impacts on biological communities are reduced during passage through the ponds, providing a degree of protection for biological communities in their receiving waters. In both ponds, disturbance effects from the incoming Stormwater on algal community richness and evenness appear to be greatest in the sediment forebay and are reduced in the main pond. However, the nature of the disturbance in the two systems can be seen to be fundamentally different from a biological perspective, with Rouge Pond functioning primarily to reduce toxins harmful to algal communities (e.g., heavy metals), and Harding Pond acting to reduce nutrients. The taxonomic composition of the two sites provides an indication of the quality of the incoming Stormwater. Rouge Pond, which contains many marine and brackish water species, receives Stormwater runoff from a major highway, while Harding Pond, containing more nutrient rich species, receives Stormwater primarily from residential properties. Despite the nutrient-rich conditions present in both ponds, nuisance blue-green algae (cyanobacte-ria) are conspicuously absent, and the ponds appear to have little potential for developing harmful algal blooms. The lack of blue-green algae can be linked to the hydraulic functioning of the ponds, suggesting that Stormwater facilities may be engineered to inhibit undesirable algal communities.

Blue-green algae of a developing salt marsh

1963 ◽  
Vol 43 (2) ◽  
pp. 309-317 ◽  
Author(s):  
W. D. P. Stewart ◽  
G. J. F. Pugh
Keyword(s):  
Salt Marsh ◽  
Green Algae ◽  
Salt Marshes ◽  
Personal Communication ◽  
Soil Samples ◽  
Algal Flora ◽  
Present Communication ◽  
Blue Green Algae ◽  
The Past ◽  
Green Algal

In the past few years considerable attention has been paid to the distribution of the microflora of the salt marshes at Gibraltar Point, Lincolnshire (National Grid reference TF 555576). During these studies it was observed (Turner, personal communication) that blue-green algae (Myxophyceae) were of frequent occurrence in soil samples from the region, but no analyses of the algal flora were carried out. It is well established, however, that blue-green algae are generally present in salt marsh regions (Chapman, 1960 a). Previous studies on the blue-green algae of British salt marshes are few, although detailed investigations have been carried out at Canvey and Ynyslas (Carter, 1932, 1933 a, b) and Scolt Head Island (Chapman, 1939). Some difficulty is experienced, however, in attempting to correlate these results with present day studies, mainly because of the widespread colonization of salt marsh regions within recent years by Spartina townsendii H. & J. Groves, and by the fact that few quantitative data are available. It is hoped that the present communication which is concerned with the blue-green algal flora of the New Marsh at Gibraltar Point, a region dominated by Spartina townsendii, will allow an assessment to be made of the flora prevailing in a developing salt marsh under present-day conditions.

scholarly journals Distribution of phytobenthos along the coast of Lebanon

2000 ◽  
Vol 1 (2) ◽  
pp. 143 ◽  
Author(s):  
S. LAKKIS ◽  
V. NOVEL-LAKKIS
Keyword(s):  
Species Diversity ◽  
Rocky Shore ◽  
Eastern Mediterranean ◽  
Taxonomic Diversity ◽  
Taxonomic Composition ◽  
Algal Community ◽  
Sources Of Pollution ◽  
Levantine Basin ◽  
Pacific Species ◽  
Phytosociological Study

A phytosociological study of the phytobenthos was carried out along the coast of Lebanon during 1996-97. Samples were collected seasonally at six sites, some of which showed distinct pollution signature. Quadrates of 0.04 m-2 were taken at selected stations fixed on transects perpendicular to the rocky shore and covering the supralittoral, the mediolittoral and infralittoral zones. The taxonomic composition, the abundance and species diversity of algal community were analysed in relation to environmental factors. A total of 230 taxa were identified during the period of survey. Several sources of pollution, resulted in the reduction of macroalgae biomass and of the taxonomic diversity. Several Indo-Pacific species were found within the different phytocoenoses of the area; most of them were introduced into the Levantine Basin through the Suez Canal. These species, that were introduced into the Eastern Mediterranean, formed permanent populations; some of them were highly spread and dominated over other endemic species or even they replaced them.

SPECIES DIVERSITY GRADIENT TO DARKNESS STRESS IN BLUE-GREEN ALGAE/CYANOBACTERIA: A MICROSCALE TEST IN A PREHISTORIC CAVE, MOUNT CARMEL, ISRAEL

1998 ◽  
Vol 46 (3) ◽  
pp. 229-238 ◽  
Author(s):  
Oxana Vinogradova N. ◽  
Olga V. Kovalenko ◽  
Solomon P. Wasser ◽  
Eviatar Nevo ◽  
Mina Weinstein-Evron
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Green Algae ◽  
Rain Water ◽  
High Humidity ◽  
Blue Green Algae ◽  
Diversity Gradient ◽  
Governing Factor

Species diversity of epilithic cyanobacteria was studied in a 90 m deep prehistoric el-Wad cave eroded in Cenomanian limestones of Mount Carmel, Israel. The degree of illumination is the most variable index throughout the cave, whereas humidity and temperature vary moderately. In a number of sites inside the cave dripping water occurs due to filtration of rain water. In el-Wad cave 42 species from 20 genera of blue-green algae were found. The share of coccoid forms decreased and filamentous (especially oscillatorial) ones increased from the entrance to the end of the cave. Intensity of light was the governing factor for distribution of cyanobacteria in el-Wad cave; the availability of dripping affected it to a lesser extent due to the constantly high humidity of the air. Diversity of species composition and taxonomic spectrum of cyanophytes was reduced from the entrance to the end of the cave, covarying positively with darkness stress.

scholarly journals Algal flora of Madhabkunda waterfall area in Maulvi Bazar, Bangladesh. III. New records of blue-greens and greens

1970 ◽  
Vol 37 (1) ◽  
pp. 43-48
Author(s):  
Abdul Aziz
Keyword(s):  
Key Words ◽  
Green Algae ◽  
New Records ◽  
Algal Flora ◽  
Blue Green Algae

Examination of samples from Madhabkunda waterfall area at Maulvi Bazar, Bangladesh revealed the presence of Aphanocapsa montana Cramer, Oscillatoria acuiformis Skuja, Oscillatoria redeckii Van Goor, Gloeotrichia natans (Hedwig) Rabenh., Nostochopsis lobatus Wood em Geitler, Schizochlamys gelatinosa A. Br. and Kirchneriella dianae (Bohl.) Coms var. dianae Bohl., Oscillatoria redeckii Van Goor is a new records for this Subcontinent. Aphanocapsa montana Cramer, Oscillatoria acuiformis Skuja, Nostochopsis lobatus Wood em Geitler and Kirchneriella dianae (Bohl.) Coms var. dianae Bohl. are new records for Bangladesh. Key words: Blue-green algae, Cyanobacteria, Green algae, Waterfall, Bangladesh doi:10.3329/bjb.v37i1.1562 Bangladesh J. Bot. 37(1): 43-48, 2008 (June)

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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