scholarly journals The European river lamprey Lampetra fluviatilis (L., 1758) (Petromyzontidae) as a component of the Neva Bay bottom coenoses

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Nataliya V. Polyakova ◽  
Aleksandr V. Kucheryavyy ◽  
Ekaterina A. Movchan
Keyword(s):  
Gulf Of Finland ◽  
Lampetra Fluviatilis ◽  
Chironomid Larvae ◽  
Macrobenthic Communities ◽  
River Lamprey ◽  
Average Abundance ◽  
First Time ◽  
The Gulf Of Finland ◽  
Neva Bay

The presence of larvae of the European river lamprey Lampetra fluviatilis was reported for the first time from in macrobenthic communities of the Neva Bay of the Gulf of Finland (St. Petersburg, Russia). It has been shown that ammocoetes inhabit several areas, at depths to 12 meters. Apart from ammocoetes, the communities with lamprey larvae contain abundant oligochaetes, bivalves, and less commonly chironomid larvae. At some sites, the number of larvae was up to 80 specimens/m2, while their biomass was over 90% of the total of the community. The abundance of macrozoobenthos in these sites is generally low (average abundance 190 specimens/m2, biomass – 70 g/m2), which is usual in autumn. Intestines of the ammocoetes constantly contained large quantities of diatoms representing common phytoplankton of the Gulf of Finland.

PROBLEM OF HEAVY METAL SURFACE SEDIMENT CONTAMINATION IN THE EASTERN GULF OF FINLAND

2017 ◽  
Author(s):  
N Derugina ◽  
N Derugina ◽  
А Grigoriev ◽  
A Grigoriev ◽  
Дарья Рябчук ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Bottom Sediments ◽  
Late Holocene ◽  
Sediment Contamination ◽  
Gulf Of Finland ◽  
Slow Decline ◽  
Contamination Levels ◽  
The Gulf Of Finland ◽  
Neva Bay

This project defines the pre-industrial quantities of heavy metals in sediment sequences of the Late Holocene from the Eastern Gulf of Finland. A comparative analysis reveals differences and similarities in the current concentrations of heavy metals in bottom sediments and pre-industrial levels. It is found that the maximum concentrations of heavy metals in the bottom sediments of the Gulf of Finland and Neva Bay occurred in the period of 1950-1990. Since the 1990s, the trend has been a slow decline in the contamination levels; however, the concentrations of some heavy metals in bottom sediments remain high.

The very first experience of biological analysis of water in Saint-Petersburg

2021 ◽  
pp. 124-130
Author(s):  
Nataliya B. Balashova ◽  
Grigorii A. Kiselev
Keyword(s):  
Quality Analysis ◽  
Northern Coast ◽  
Original Source ◽  
Saint Petersburg ◽  
Neva River ◽  
The Baltic ◽  
First Time ◽  
Heavily Polluted Area ◽  
The Gulf Of Finland ◽  
Neva Bay

The biological method of water quality analysis, for the first time, was applied in Russia during the examination of Neva Bay of the Gulf of Finland in the Baltic Sea by Wislouch S.M. Neva River was a source of drinking water in St. Petersburg and, at the same time, a discharge for all city drains. As a result, it became hazardous to health, being a source of various diseases, especially cholera. From August 1911 to September 1912 pollution studies of the Bay were made to solve the question - where to send the treated waste water of the future sewage system of St. Petersburg. In total, 37 trips were made during this time, 510 samples were taken, including 375 plankton samples and 35 benthic samples. Wysłouch S. M. gave an overview of objects collected at 265 stations located in the area of Neva Bay - from estuary of Bolshaya Neva to Kronstadt, along the southern coast of the Bay and partially along the Northern coast. He brought a list of algae, including 97 species: Algae Cyanophyceae (writing all taxa retained on original source) – 17 species, Flagellata – 19 species, Peridineae – 1, One – 30, Conjugatae – 2, Diatomaceae – 28 species, Fungi (1), Bacteria (17), Protozoa (28), Rotatoria (17). Taking into account the algae and other organisms saprobity indices, areas with different degrees of contamination were identified. All the data was put on map of the Gulf. The most heavily polluted area was the Sea channel, and the area between the Lisij Nos and Kronstadt was the cleanest.

Biological characteristics of smolts of European river lamprey Lampetra fluviatilis from the Chernaya River basin (Gulf of Finland, Baltic Sea)

2017 ◽  
Vol 57 (2) ◽  
pp. 276-286 ◽  
Author(s):  
A. V. Kucheryaviy ◽  
I. A. Tsimbalov ◽  
D. Yu. Nazarov ◽  
A. O. Zvezdin ◽  
D. S. Pavlov
Keyword(s):  
Baltic Sea ◽  
River Basin ◽  
Biological Characteristics ◽  
Gulf Of Finland ◽  
Lampetra Fluviatilis ◽  
River Lamprey

Redescription of Lampetra ayresii (Günther) of Western North America, a Species of Lamprey (Petromyzontidae) Distinct from Lampetra fluviatilis (Linnaeus) of Europe

1958 ◽  
Vol 15 (1) ◽  
pp. 47-77 ◽  
Author(s):  
Vadim D. Vladykov ◽  
W. I. Follett
Keyword(s):  
North America ◽  
San Francisco ◽  
Western North America ◽  
Lampetra Fluviatilis ◽  
Caudal Fin ◽  
Dark Pigment ◽  
River Lamprey ◽  
Lampetra Planeri ◽  
Skeena River ◽  
First Time

Lampetra ayresii (Günther), a species of parasitic river lamprey endemic to western North America, is redescribed on the basis of material from off the Skeena River, British Columbia, to San Francisco Bay, California. A neotype is designated. Transformed specimens differ from those of the European Lampetra fluviatilis (Linnaeus) in having a larger eye, a longer prebranchial and a shorter branchial region, and possibly a lower second dorsal fin, an acute rather than an obtuse caudal fin, a higher average number of trunk myomeres, and an area of dark pigment on the caudal fin. Ammocoetes differ from those of Lampetra fluviatilis principally in having a higher number of myomeres, a dark caudal spot (which distinguishes them also from ammocoetes of Lampetra planeri (Bloch), the nonparasitic brook lamprey), and an absence of dark pigment on most parts of the head and on the precursor of the tongue. Specimens from Oregon are recorded for the first time. Specimens from Mill Creek, Tehama County, California, show that this species ascends the Sacramento River farther than previous records indicated. An annotated synonymy is included. Lampetra ayresii is indicated as distinct from Ammocoetes cibarius Girard, which is regarded as identical with Entosphenus tridentatus (Richardson). Lampetra ayresii and Lampetra fluviatilis are illustrated by a number of original drawings and photographs.

scholarly journals New data on the flora of Centrophyceae (Bacillariophyta) in the Neva Bay of the Gulf of Finland (Russia)

Algologia ◽  
2021 ◽  
Vol 31 (4) ◽  
pp. 382-389
Author(s):  
S.I. Genkal ◽  
◽  
I.S. Trifonova ◽  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Microscopy Study ◽  
Systematic Position ◽  
Electron Microscopy Study ◽  
Gulf Of Finland ◽  
Centric Diatoms ◽  
The Gulf Of Finland ◽  
Neva Bay ◽  
Scanning Electron

This scanning electron microscopy study of phytoplankton from the Neva Bay and analysis of valve images from S.I. Genkal’s iconotheka have provided new data on centric diatoms of the Neva Bay. Representatives of the genera Aulacoseira scalaris and Stephanodiscus lacustris, new to the flora of the Bay, have been identified. The systematic position and distribution of 14 species and varieties of Centrophyceae from the genera Aulacoseira, Conticribra, Cyclostephanos, Ellerbeckia, Handmannia, Pantocsekiella, Stephanodiscus, Thalassiosira have been refined and specified. The species composition of the class Centrophyceae of the Neva Bay has been expanded. Now it includes 42 species and varieties from 17 genera.

PROBLEM OF HEAVY METAL SURFACE SEDIMENT CONTAMINATION IN THE EASTERN GULF OF FINLAND

2017 ◽  
Author(s):  
N Derugina ◽  
N Derugina ◽  
А Grigoriev ◽  
A Grigoriev ◽  
Дарья Рябчук ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Bottom Sediments ◽  
Late Holocene ◽  
Sediment Contamination ◽  
Gulf Of Finland ◽  
Slow Decline ◽  
Contamination Levels ◽  
The Gulf Of Finland ◽  
Neva Bay

This project defines the pre-industrial quantities of heavy metals in sediment sequences of the Late Holocene from the Eastern Gulf of Finland. A comparative analysis reveals differences and similarities in the current concentrations of heavy metals in bottom sediments and pre-industrial levels. It is found that the maximum concentrations of heavy metals in the bottom sediments of the Gulf of Finland and Neva Bay occurred in the period of 1950-1990. Since the 1990s, the trend has been a slow decline in the contamination levels; however, the concentrations of some heavy metals in bottom sediments remain high.

Saint Petersburg Flood Protection Dam as Tool to Solve the Environmental Tasks

2019 ◽  
Vol 828 ◽  
pp. 202-207
Author(s):  
Ludmila Tsvetkova
Keyword(s):  
Field Experiment ◽  
Large Scale ◽  
Flood Protection ◽  
Gulf Of Finland ◽  
Ecological State ◽  
Saint Petersburg ◽  
Large Scale Field ◽  
The Baltic ◽  
The Gulf Of Finland ◽  
Neva Bay

The paper grounds the necessity to conduct the large-scale field experiment on manoeuvring with the floodgates of Saint Petersburg Flood Protection Complex (FPC). The paper presents the results of I-stage experiment and the program of II-stage experiment. The aim of the experiment is the verification of the possibility to manage the hydrological, sanitary and ecological state of the Neva Bay and the eastern part of the Gulf of Finland of the Baltic sea by means of manoeuvring with Flood Protection Complex floodgates. In order to develop the program of field experiment implementation it was necessary to assess the sanitary and ecological state of water ecosystem under present conditions. The assessment was based on monitoring data concerning the certain priority parameters obtained from the selected representative measuring points. On the basis of the analysis of water quality and the state of the Neva Bay and the eastern part of the Gulf of Finland the scheme for manoeuvring with floodgates of the FPC together with the sequence of order of their opening and closing was developed. Recommendations regarding the conditions and terms of conducting the experiment were developed.

scholarly journals Retrieval of the land-sea contrast of cloud liquid water path by applying a physical inversion algorithm to combined zenith and off-zenith ground-based microwave measurements

2022 ◽  
Author(s):  
Vladimir Kostsov ◽  
Dmitry Ionov ◽  
Anke Kniffka
Keyword(s):  
Gulf Of Finland ◽  
Cloud Base ◽  
Microwave Measurements ◽  
Liquid Water Path ◽  
Observational Site ◽  
Control Procedures ◽  
Cloud Liquid Water Path ◽  
The Gulf Of Finland ◽  
Neva Bay ◽  
Cloud Base Height

Abstract. Combined zenith and off-zenith ground-based observations by modern microwave radiometers provide an opportunity to study horizontal inhomogeneities of the humidity field in the troposphere and of the cloud liquid water path (LWP) spatial distribution. However, practical applications are difficult and require thorough analysis of the information content of measurements, assessment of errors of data processing algorithm and the development of the quality control procedures. In this study we analyse the application of our LWP retrieval algorithm based on the inversion of the radiative transfer equation to the problem of detection of the LWP horizontal inhomogeneities by means of ground-based microwave observations in the vicinity of a coastline of a water object of medium size. The study is based on data acquired by the microwave radiometer RPG-HATPRO which is located in the suburbs of St.Petersburg, Russia, at 2.5 km distance from the coastline of the Neva Bay (the Gulf of Finland) and is operating in angular scanning mode in the vertical plane. The retrieval setup is organised in such a way that zenith and off-zenith measurements provide equal sensitivity to atmospheric parameters. The optimal elevation angles for off-zenith observations are selected. The possibility to detect LWP horizontal inhomogeneity, namely the LWP land-sea contrast, for different measurement geometries (elevation angles) and values of cloud base height is analysed. It is shown that ground-based microwave observations in the vicinity of a coastline can be a valuable tool for validation of the space-borne measurements of the LWP land-sea contrast if three principal requirements are met: (a) the multi-parameter physical inversion method is used for retrieving LWP; (b) rigorous bias correction and quality control procedures are applied to the retrieval results; (c) the information on the cloud base height is available. As a result of processing the microwave measurements at the observational site of St.Petersburg State University, the monthly-averaged values of the LWP land-sea difference have been obtained for summer months within the period 2013–2021. For 24 out of 25 months of high quality observations, the LWP land-sea monthly difference is positive (larger values over land and smaller values over water) and can reach 0.06–0.07 kg m−2. The estimations of the LWP land-sea contrast obtained from the ground-based microwave measurements at the observational site of St.Petersburg University are in very good agreement with the values of the LWP land-sea contrast obtained from the multi-year space-borne measurements by the SEVIRI instrument (Spinning Enhanced Visible and InfraRed Imager) in the region of the Neva Bay (the Gulf of Finland) in June and July. For August, the so-called “August anomaly” detected by space-borne observations is not confirmed by the ground-based measurements.

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