Formation features of phytoplankton of the Bolshaya river (Omsk region) in the zoo's influence zone

2021 ◽  
pp. 131-134
Author(s):  
Olga P. Bazhenova ◽  
Svetlana V. Gontarenko
Keyword(s):  
Seasonal Dynamics ◽  
Trophic Status ◽  
Taxonomic Composition ◽  
Influence Zone ◽  
Dynamics Of Abundance ◽  
Quality Class ◽  
Zone Of Influence ◽  
High Level

According to the results of processing phytoplankton samples taken in 2018–2019 on the Bolshaya River (Omsk Region), the taxonomic composition of phytoplankton, its number and biomass were established in the zone of influence of the Bolsherechensky Zoo. As part of the phytoplankton, 183 species and intraspecific taxa from 8 divisions were identified. Seasonal dynamics of abundance of river phytoplankton and its changes in zone of zoo influence were investigated. In summer, a high level of phytoplankton development and «flowering» of water caused by Aphanizomenon flos-aquae are observed in the river on the territory of the zoo. In the formation of the number and biomass of phytoplankton, a significant share belongs to Chrysophyta and Euglenophyta. The trophic status of the Bolshaya River corresponds to the category of eutrophic waters. In autumn and summer, water in the river corresponds to the 3rd quality class of «satisfactory purity».

The state of phytoplankton in the Taganrog Bay and factors determining its development in 2017

2020 ◽  
pp. 69-73
Author(s):  
Lyudmila G. Korneva ◽  
Galina Yu. Glushchenko
Keyword(s):  
Organic Matter ◽  
Seasonal Dynamics ◽  
General Structure ◽  
Taxonomic Composition ◽  
Sea Of Azov ◽  
Don River ◽  
The Stability ◽  
High Level ◽  
Taganrog Bay ◽  
Qualitative Changes

The work presents the results of a study of phytoplankton in Taganrog Bay of the Sea of Azov and the downstream reaches of the Don River (January, April – November 2017). During the study was identified the modern taxonomic composition (210 species of eukaryotic algae and cyanobacteria). Ecological and geographical analysis was showed the stability of the general structure of the plankton algoflora of the studied area compared with previous years of the study (1980s to early 2000s). The work also presents a characteristic of the seasonal dynamics of taxonomic, size structures, and coenotic composition of phytoplankton. During the study was noted the temporary and qualitative changes in composition of phytoplankton, which are indicate a high level of organic matter in the studied reservoirs and an increase in the heterotrophic component in the functioning of the Lower Don ecosystem. It was found that in the studied water bodies the important factor in the formation of composition and the structure of phytoplankton is salinity.

PECULIARITIES OF THE FLORISTIC COMPOSITION AND CHARACTER OF OVERGROWTH OF SMALL NON-FLOWING LAKES OF NARACH LAKE GROUP (BELARUS)

2021 ◽  
pp. 26-40
Author(s):  
A. Lapirov ◽  
E. Garin ◽  
E. Belyakov ◽  
A. Shestakova ◽  
O. Makarevich
Keyword(s):  
Plant Species ◽  
Vascular Plants ◽  
National Park ◽  
Trophic Status ◽  
Floristic Composition ◽  
Taxonomic Composition ◽  
Water Bodies ◽  
Annotated List ◽  
Liparis Loeselii ◽  
Isoetes Lacustris

The flora of small non-flowing lakes of the Narach lake group located on the territory of the Narachanski National Park (Belarus, Minsk region, Myadelsky district) was studied. The taxonomic composition of the flora numbering 126 species of vascular plants belonging to 85 genera from 42 families was revealed. Three plant species which are included in the list of protected taxa in Belarus were found – Liparis loeselii (L.) Rich. (Lake Shestakovo), Aldrovanda vesiculosa L. (Lake Shestakovo) and Isoëtes lacustris L. (Lake Beloe). Based on the annotated list of species presented in the work, taxonomic, geographical, ecological-coenotic and ecobiomorphological analyzes of the flora of water bodies were performed. According to the taxonomic and environmental structure, the flora of the studied lakes is shown to be traditional for this territory. The differences in the flora of the studied lakes are mainly due to their trophic status and, to a lesser extent, due to the diversity of biotopes and the nature of the anthropogenic load. Information on the nature of overgrowing of these water bodies is provided.

scholarly journals Short Communication: Zooplankton as indicator of trophic status of lakes in Ilmen State Reserve, Russia

2021 ◽  
Vol 22 (3) ◽  
Author(s):  
Irina V. Mashkova ◽  
Anastasiya Kostryukova ◽  
Elena Shchelkanova ◽  
Viktor Trofimenko
Keyword(s):  
Trophic Status ◽  
Short Communication ◽  
Ecological Status ◽  
Taxonomic Composition ◽  
Zooplankton Biomass ◽  
Taxonomic Structure ◽  
The Status ◽  
Ilmen State Reserve ◽  
Chelyabinsk Region ◽  
Zooplankton Communities

Abstract. Mashkova IV, Kostryukova AM, Shchelkanova EE, Trofimenko VV. 2021. Short Communication: Zooplankton as indicator of trophic status of lakes in Ilmen State Reserve, Russia. Biodiversitas 22: 1448-1455. Zooplankton is a potentially powerful tool for assessing the trophic state of aquatic ecosystems. The current paper studied taxonomic composition and biomass of zooplankton communities in ten lakes within Ilmen State Reserve, Chelyabinsk region, Russia and identified the influence of trophic status on its formation. Integrated samples were taken from epilimnion in the summer of 2016-2019. Several criteria were used to determine trophic status: the taxonomic structure and biomass of zooplankton; some hydroecological indicators some hydroecological indicators and the Carlson index. The trophic status of the studied lakes, determined based on the zooplankton biomass, revealed that most of the lakes were in the status of mesotrophic. The number of zooplankton species in the lakes was 44 with Pleuroxus laevis, Bosmina longirostris, Simocephalus vetulus were the most numerous species in mesotrophic lakes; while Chaetonotus ploenensis, Keratella quadrata frenzeli, Leptodora kindti are rare. Zooplankton communities of Bolshoye Miassovo and Maloye Miassovo Lakes were characterized by high species diversity and considered as one of the most significant among the foothill lakes of the eastern slope of South Ural. The study reveals that hydroecological assessment of the ecological status is not exactly precise, as values are not stable and can change not only under the anthropogenic influence but also due to many natural abiotic environmental factors. The research shows that species composition and biomass of zooplankton communities could provide a more accurate assessment of the trophic status of water-bodies.

scholarly journals Seasonal dynamics of cadmium and plumbum in the Turia and Pripyat rivers

2020 ◽  
pp. 540-546
Author(s):  
Halyna Humeniuk ◽  
Olena Voloshyn ◽  
Volodymyr Voloshyn
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Seasonal Dynamics ◽  
Aquatic Ecosystems ◽  
Quantitative Composition ◽  
Anthropogenic Pressure ◽  
Qualitative Composition ◽  
Significant Excess ◽  
Qualitative And Quantitative ◽  
High Level

The anthropogenic pressure on aquatic ecosystems leads to a significant transformation of their quantitative and qualitative composition. Many rivers of Ukraine are polluted. The object of research was the surface waters of the rivers Pripyat and Turiya (Volyn region, Ukraine). Analysis of the qualitative and quantitative composition of toxicants (Cd, Pb) showed that the waters of the rivers have high level of pollution. A negative phenomenon in the studied reservoirs is a significant excess of concentrations of heavy metals: lead in 118 times and cadmium in 110 times in August.

scholarly journals The effect of Puccinia komarovii Tranzsch. infection on characters of Impatiens parviflora DC. in Galio sylvatici-Carpinetum (R. Tx. 1937) Oberd. 1957 forest association

2011 ◽  
Vol 75 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Renata Piskorz ◽  
Małgorzata Klimko
Keyword(s):  
Environmental Factor ◽  
High Mortality ◽  
Biomass Allocation ◽  
Seasonal Dynamics ◽  
Defense Mechanisms ◽  
Total Biomass ◽  
Fresh Weight ◽  
Dynamics Of Abundance ◽  
Impatiens Parviflora ◽  
Generative Organs

The aim of the present study was to determine how internal diversity of oak-hornbeam forest modifies the course and effects of infestation of small-flowered balsam (<em>Impatiens parviflora</em>) with rust <em>Puccinia komarovii</em>. The study investigated the effect of the disease on the demography of the population, and the habit and biomass allocation of the infested specimens, as well as the initiation of non-specific defense mechanisms. It was shown that: 1) the percentage of infected specimens was independent of the undergrowth-coverage rate and of the <em>I. parviflora</em> density; 2) infected populations differ from healthy ones in the seasonal dynamics of abundance changes; 3) high mortality is observed as early as May and the first part of June, i.e. it pertains to specimens, which did not begin reproduction; 4) the presence of infection and its intensity stimulate the growth of the stem and the hypocotyl; 5) fresh weight of infected specimens is by almost 30% lower in comparison to the weight of uninfected plants; the weight of badly infected plants decreases by 20% in comparison to the less severely infected balsam plants; the weight of generative organs drops most significantly, even by over 50%; 6) biomass allocation does not fluctuate considerably; 7) reproduction effort expressed by the ratio of the weight of fruits (or only seeds) to the total biomass shows a distinct downward trend; 8) the environmental factor does not affect the force of defense mechanisms, the strength of biochemical response of diseased plants depends on the degree of their infestation.

scholarly journals Seasonal Dynamic of CDOM in a Shelf Site of the South-Eastern Ligurian Sea (Western Mediterranean)

2020 ◽  
Vol 8 (9) ◽  
pp. 703
Author(s):  
Luca Massi ◽  
Laura Frittitta ◽  
Chiara Melillo ◽  
Francesca Polonelli ◽  
Veronica Bianchi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Organic Carbon ◽  
Phytoplankton Biomass ◽  
Light Availability ◽  
Western Mediterranean ◽  
Taxonomic Composition ◽  
Seasonal Dynamic ◽  
Ligurian Sea ◽  
Positive Correlations ◽  
High Level

Chromophoric dissolved organic matter (CDOM) is the fraction of the Dissolved Organic Carbon (DOC) mainly absorbing UV and blue radiation, influencing water optical properties, light availability for primary production, and water-leaving radiance. In open seas, phytoplankton is the main source of organic carbon and CDOM. Despite this, the direct or indirect phytoplankton role in CDOM production is not yet fully clarified. From studies about the relationship between CDOM and phytoplankton biomass as Chlorophyll a (Chl) in the epipelagic layer, positive correlations have been highlighted with regional differences and high levels of variability. Seven years of seasonal dynamic and vertical distribution of CDOM in the Ligurian Sea continental shelf waters have been analyzed in order to evidence the main environmental and/or biological factors determining CDOM dynamic, focusing on the CDOM/Chl relationship. CDOM optical properties (absorption at 440 nm, aCDOM (440), and spectral slope, S) allowed to distinguish different pools and to debate their origin. Four different pools were characterized and two of them were directly or indirectly related to phytoplankton biomass and taxonomic composition. Nevertheless, CDOM/Chl confirm a high level of variability These findings suggest some inputs to improve Mediterranean satellite estimates of Chl and CDOM, such as the seasonal differentiation of optical properties, especially S and CDOM/Chl relationships.

scholarly journals Monitoring the deformation of the earth’s surface in the zone of influence construction

2020 ◽  
Vol 157 ◽  
pp. 02013
Author(s):  
Aleksandr Kazantsev ◽  
Aleksei Boikov ◽  
Vyacheslav Valkov
Keyword(s):  
Soil Mass ◽  
Deformation Monitoring ◽  
Existing Buildings ◽  
Influence Zone ◽  
Monitoring Technique ◽  
Observation Methods ◽  
Zone Of Influence ◽  
New Construction ◽  
Simulation Results ◽  
Under Construction

The issues of ensuring the safe construction and operation of buildings and structures in a metropolis are considered. A description of the monitoring technique is given, which is to control the deformation process during new construction near existing buildings. The necessity of performing geodetic observations of deformations of the earth’s surface is emphasized. A precalculation of the accuracy of determining the position of deformation grades located in the influence zone of an object under construction is given. Based on the simulation results, control zones are identified in which it is proposed to monitor the process of deformation of the soil mass at the boundary of the pit. The advantages of the integrated deformation monitoring technique over traditional observation methods are presented.

scholarly journals Assessment of the Trophic Status of the South Lagoon of Tunis (Tunisia, Mediterranean Sea): Geochemical and Statistical Approaches

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Myriam Abidi ◽  
Rim Ben Amor ◽  
Moncef Gueddari
Keyword(s):  
Water Quality ◽  
Trophic Status ◽  
Nutrient Content ◽  
Water Quality Monitoring ◽  
Anthropogenic Factors ◽  
The South ◽  
Engineering Project ◽  
Multivariate Statistical ◽  
Status Assessment ◽  
High Level

The trophic status assessment of the South Lagoon of Tunis, a shallow Mediterranean coastal area after its restoration, is addressed herein with respect to its various environmental settings which are taken as indicators of water quality. The lagoon had, in the past, witnessed severe environmental quality issues. To resolve these problems, a large restoration project of the lagoon was undertaken which consisted of dredging the bottom sediments removing areas of water stagnation and improving water circulation. After this restoration work, the lagoon morphology has radically changed. In this paper, we attempt to evaluate the lagoon water’s trophic state to analyze the eutrophication risk after almost 16 years. In order to achieve these purposes, two water quality monitoring campaigns were conducted (July 2013 and February 2014). Natural and anthropogenic factors controlling the nutrient content of the lagoon water have been assessed through both geochemical methods and multivariate statistical tools. The results show that the nutrients are from external sources due to the discharge of municipal and industrial wastewater from the surrounding city of the catchment in the lagoon’s south side. According to the TRIX index, the lagoon remains eutrophic presenting a “poor” water quality, notwithstanding the engineering project due to the high level of nutrients.

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