scholarly journals Results of zoobentos research in river Sotka, PINEZHSKY STATE RESERVE (Arkhangelsk region, Russia)

2021 ◽  
pp. 16-30
Author(s):  
Сергей Николаевич Артемьев ◽  
Александр Павлович Новоселов ◽  
Николай Владимирович Климовский ◽  
Геннадий Александрович Дворянкин ◽  
Олег Станиславович Дурныкин
Keyword(s):  
Water Quality ◽  
Taxonomic Diversity ◽  
Bivalve Mollusks ◽  
Chironomid Larvae ◽  
Spatial Aspect ◽  
Species Similarity ◽  
Bristle Worms ◽  
Quantitative Indicators ◽  
Benthic Animals ◽  
Benthic Sampling

В статье рассмотрен качественный состав (видовое и таксономическое разнообразие) и количественные показатели (встречаемость, численность и биомасса) зообентоса р. Сотка в пространственном аспекте. Выявлены участки реки с минимальной и максимальной численностью и биомассой. Определены доминирующие группы донных животных по численности (личинки хирономид и малощетинковые черви) и биомассе (двукрылые, олигохеты и двустворчатые моллюски). На основе кластерного анализа (по видовому сходству) станции отбора бентосных проб объединены в 2 группы. Качество вод оценено как условно чистое - слабо загрязненное. Проведенные исследования зообентоса в уникальной реке на территории заповедника Пинежский будут использованы при ведении комплексного мониторинга качества вод и биотической части ее экосистемы (фито- и зоопланктон, зообентос, ихтиофауна), включая и приточную систему. The article considers the qualitative composition (species and taxonomic diversity) and quantitative indicators (occurrence, number and biomass) of zoobenthos of river Sotka in the spatial aspect. The sections of the river with the minimum and maximum abundance and biomass were identified. The dominant groups of benthic animals were determined by their numbers (chironomid larvae and small-bristle worms) and biomass (dipterans, oligochaetes and bivalve mollusks). Comparison of quantitative indicators in the annual aspect revealed a significant increase in biomass and relative stability of abundance over a 20-year period at the Filippovskoye site, as well as a decrease in numbers and biomass at the Moiseev Nos site. Based on cluster analysis (by species similarity), benthic sampling stations are combined into 2 groups. Water quality is assessed as conditionally pure, slightly polluted. Studies of zoobenthos in a unique river on the territory of the Pinezhsky reserve will be used to conduct a comprehensive monitoring of water quality and the biotic part of its ecosystem (phyto- and zooplankton, zoobenthos, ichthyofauna), including the inflow system.

scholarly journals The fauna and benthic communities of invertebrates of the Ural river within the Atuar steppe (Orenburg state nature reserve)

2021 ◽  
pp. 275-288
Author(s):  
Tat'yana S. Krayneva ◽  
◽  
Nikolaj N. Pan'kov ◽  
Keyword(s):  
Nature Reserve ◽  
Benthic Communities ◽  
Water Bodies ◽  
Chironomid Larvae ◽  
Sandy Gravel ◽  
Limnodrilus Hoffmeisteri ◽  
Bithynia Tentaculata ◽  
State Nature Reserve ◽  
Bristle Worms ◽  
State Nature

There are 70 species and forms in the composition of zoobenthos of the river Ural and in water bodies of its floodplain have been identified. Mayflies and chironomids are represented in various ways (13 and 12 species and forms, respectively). Caddisflies (10) and stone flies (7) are rich in species. Among other invertebrates, bivalves (6) and gastropods (5), small-bristled worms (5), non-chironomid dipterans (4), leeches, crustaceans and dragonflies, bugs and beetles were recorded. On sandy-gravel-pebble soils is formed a zoobenthocenosis, dominated by the mayflies Ephoron virgo. They are accompanied by Chironomidae larvae. The biomass of the community varies between of 29.32–31.68 g/m2 with an abundance of 18.1–32.44 thousand ind./m2. In the coastal of the channel is formed a pelophilic zoobenthocenosis, the basis of it abundance and biomass are constituted by the small-bristle worms Limnodrilus hoffmeisteri. They are accompanied by mollusks Stagnicola palustris and mysids P. lacustris. The biomass of the pelophilic community is 13.68 g/m2 with a population of 15.45 thousand ind./m2. In floodplain water bodies are formed pelophilic zoobenthocenoses, the biomass of which varies in the range of 19.2–34.24 g/m2 with an abundance of 5.64–30.04 thousand ind./m2. Chironomid larvae constitute the base of the population. The biomass is composed by dragonflies Libellula sp., Chironomids, and mollusks Bithynia tentaculata.

Accumulation of Mercury by Plankton and Benthic Invertebrates in Riverine Lakes of Northern Manitoba (Canada): Importance of Regionally and Seasonally Varying Environmental Factors

1988 ◽  
Vol 45 (10) ◽  
pp. 1744-1757 ◽  
Author(s):  
Togwell A. Jackson
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Benthic Invertebrates ◽  
Spring Flood ◽  
Chironomid Larvae ◽  
Decomposition Of Organic Matter ◽  
Preferential Uptake ◽  
Predominant Effect ◽  
Benthic Animals ◽  
Hg Accumulation

Mercury (Hg) concentrations in plankton and benthic invertebrates from riverine lakes of northern Manitoba were generally found to be unrelated, or inversely related, to inorganic and methyl mercury levels and Hg methylation rates in their habitats but were strongly dependent on environmental factors. The relationships suggest that the uptake of Hg by these organisms was controlled largely by suspended and sedimentary Hg-binding substances such as FeOOH, MnOOH, organic matter, sulfides, and clay. The sole exception was midsummer phytoplankton, whose Hg content was a function of Hg levels in local sediments, probably because interference by suspended detritus was minimal; during the spring flood, such interference had a predominant effect. Aeration of lake water by fluvial currents probably enhances the availability of Hg to plankton by promoting decomposition of organic matter and sulfides but decreases the availability of Hg to some benthic animals by causing MnOOH precipitation. FeOOH apparently limits Hg uptake by chironomid larvae but MnOOH limits Hg uptake by oligochaetes, nematodes, and pelecypods, suggesting preferential uptake of certain forms of Hg by particular biological and mineral species. Decreases in temperature may also retard Hg uptake by benthos. Biodilution has no significant effect on Hg accumulation by benthos or plankton.

Seasonality in water quality and its influence on the abundance and distribution of phytoplankton and chironomid larvae in Lake Nakuru, Kenya

2008 ◽  
Vol 30 (3) ◽  
pp. 333-338 ◽  
Author(s):  
Samuel Kibichii ◽  
William A. Shivoga ◽  
Mucai Muchiri ◽  
Erick Enanga ◽  
Scott N. Miller
Keyword(s):  
Water Quality ◽  
Lake Nakuru ◽  
Chironomid Larvae ◽  
Abundance And Distribution

Colonization dynamics of periphytic ciliate communities across taxonomic levels using an artificial substrate for monitoring water quality in coastal waters

2010 ◽  
Vol 91 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Henglong Xu ◽  
Joon-Ki Choi ◽  
Gi-Sik Min ◽  
Qinglin Zhu
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Marine Ecosystem ◽  
Taxonomic Diversity ◽  
Artificial Substrate ◽  
Taxonomic Distinctness ◽  
System 2 ◽  
Colonization Dynamics ◽  
Colonization Patterns ◽  
Lower Variability

Taxonomic diversity and temporal patterns in abundance of periphytic ciliate communities across taxonomic levels were studied to monitor water quality in Korean coastal waters during April 2007. Specifically we compared two methods based on an artificial substrate (glass slide): the polyurethane foam enveloped slide (PFES) and the conventional slide (CS) systems. The results demonstrated that: (1) the colonization patterns of the ciliate communities at all taxonomic levels showed a lower variability in the PFES system than those of the CS system; (2) The taxonomic diversity (Δ) and taxonomic distinctness (Δ*) were significantly higher in the PFES system than those in the CS system; and (3) all four taxonomic diversity/distinctness indices represented lower variability in the PFES system than those of the CS samples. These findings suggest that the PFES system is more effective than the CS system for measuring the colonization patterns and taxonomic distinctness parameters that are increasingly used as potential indicators of water quality. This conclusion supports our previous suggestion that the PFES system is a better tool than the CS system for monitoring water quality in the marine ecosystem, using periphytic ciliates.

scholarly journals Detection of bacteriophages and cyanophages for water quality control of a water supply system in Amazônia

2021 ◽  
Author(s):  
Bruna Verônica Azevedo Gois ◽  
Kenny da Costa Pinheiro ◽  
Wylerson Guimarães Nogueira ◽  
Andressa de Oliveira Aragão ◽  
Ana Lídia Cavalcante Queiroz ◽  
...  
Keyword(s):  
Water Quality ◽  
Resistance Genes ◽  
High Throughput Sequencing ◽  
Antibiotic Resistance Genes ◽  
Taxonomic Diversity ◽  
Metropolitan Region ◽  
Human Consumption ◽  
Metagenomic Sequencing ◽  
Sequencing Data ◽  
Water Quality Control

Abstract Background: Despite the importance of understanding the ecology of freshwater viruses, there are not many studies on the issue when compared to marine viruses. The microbiological interactions that occur in these environments are still poorly known, especially between bacteriophages and their host bacteria, as well as between cyanophages and cyanobacteria. Lake Bologna, from Belém, capital of the Brazilian State of Pará, is a source of water that supplies the city and its metropolitan region, yet it remains unexplored regarding the contents of its virome and viral diversity composition. Therefore, this work's main aim is to clarify in terms of taxonomic diversity the species of DNA viruses that are present in this lake, especially bacteriophages and cyanophages, since they can act both as transducers of resistance genes and reporters of water quality for human consumption. Results: For this work, we used the metagenomic sequencing data generated by Alves et al. (2020), and we analyzed it at the taxonomic level using the tools Kraken2, Bracken, and Pavian; later, the data was assembled using Genome Detective, which performs assembly of viruses. The results observed in this work suggest the existence of a widely diverse viral community and an established microbial phage regulated dynamics in the Lake Bolonha. Conclusions: This work is the first-ever to describe the virome of Lake Bolonha using a metagenomic approach based on high-throughput sequencing, as it contributes to the understanding of water-related public health concerns regarding the spreading of antibiotic resistance genes and population control of native bacteria and cyanobacteria.

scholarly journals INTERANNUAL DYNAMICS OF PLANKTON COMMUNITIES IN THE CHANNEL SECTIONS OF THE KUIBYSHEV RESERVOIR

2021 ◽  
Vol 24 (2-3) ◽  
pp. 112-115
Author(s):  
M.A. Gvozdareva ◽  
O.S. Lyubina ◽  
A.V. Melnikova ◽  
L.G. Grechukhina
Keyword(s):  
Taxonomic Diversity ◽  
Taxonomic Composition ◽  
Kuibyshev Reservoir ◽  
Biological Studies ◽  
Interannual Dynamics ◽  
Quantitative Indicators ◽  
Plankton Communities

Based on the materials of hydro-biological studies in the Volga part of the Kuibyshev reservoir in 2018 and 2019, the authors evaluated changes in the quantitative indicators and taxonomic composition of phytoplankton and zooplankton. According to the results of the study, it was revealed that in 2019 the taxonomic diversity increased, but the abundance and biomass indices of phytoplankton decreased, while zooplankton decreased only in its abundance.

THE DIURNAL ACTIVITY OF THE LARGER INVERTEBRATES AT THE SURFACE OF LAC LA RONGE, SASKATCHEWAN

1959 ◽  
Vol 37 (6) ◽  
pp. 945-956 ◽  
Author(s):  
J. H. Mundie
Keyword(s):  
Hyalella Azteca ◽  
Diurnal Activity ◽  
Large Lake ◽  
Mysis Relicta ◽  
Chironomid Larvae ◽  
The Hours ◽  
Chironomid Midges ◽  
Different Depths ◽  
Benthic Animals

Horizontal hauls were made with a pair of large plankton nets at the surface of a large lake to determine the 24-hour emergence cycle of chironomid midges rising from different depths and to investigate the occurrence of the larger invertebrates at the surface. Chironomid pupae ascend mainly in the hours of darkness and emergence may be immediate, as in Psilotanypus rufovittatus, or delayed for several hours, as in Procladius choreus. A migration to the surface at night is demonstrated for Mysis relicta and the amphipods Pontoporeia affinis and Hyalella azteca. Chironomid larvae and a variety of other invertebrates also occur at the surface. The findings show that many benthic animals are less static in their distribution than is commonly accepted.

scholarly journals Phytoplankton as a bioindicator of the water quality of Lake Malenets (Pskov Region)

2020 ◽  
Vol 9 (3) ◽  
pp. 58-61
Author(s):  
Tatiana V. Drozdenko ◽  
Irina V. Kek ◽  
Tatiana A. Mishkova
Keyword(s):  
Water Quality ◽  
Practical Importance ◽  
Ecological State ◽  
Phytoplankton Species Composition ◽  
Pskov Region ◽  
Quantitative Indicators ◽  
First Time ◽  
Geographical Characteristics ◽  
Degree Of Similarity

This paper shows the use of planktonic algae in determining the ecological state of the reservoir. Phytoplankton is an important link in the aquatic ecosystem, which is the first to react to the slightest fluctuations in environmental conditions by changing its structure and quantitative characteristics, and therefore is very convenient in bioindication studies. In the summer of 2017, the planktonic algaflora of Lake Malenets, located on the territory of the Mikhailovskoye Museum-Reserve in the Pushkinogorsk District of the Pskov Region, was studied for the first time. In total, 87 species and intraspecific taxa of phytoplankton were identified from 8 phylums, 12 classes, 20 orders, 35 families, and 58 genera. The dominant algaflora complex is characterized as diatom-chlorophytic with the presence of golden algae. Using the Sierensen-Chekanovsky index, the degree of similarity of the phytoplankton species composition of Lake Malenets with the nearby Lake Kuchane was estimated. The calculation of quantitative indicators of phytoplankton abundance and biomass was carried out, the ecological and geographical characteristics of microalgae were presented, and the water quality class of Lake Malenets was established. The obtained results are of practical importance, since they allow to establish the ecological state of the water body as well as to develop methodological recommendations for its improvement and stabilization.

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