GEOCHEMISTRY OF LAKE KULTUBAN (SOUTH URALS): THE IMPACT OF NATURAL AND ANTHROPOGENIC FACTORS ON THE CHEMICAL COMPOSITION OF THE SOILS, PLANTS, WATER, BOTTOM SEDIMENTS AND HYDROBIONTS

2017 ◽  
Author(s):  
Anatoly Somov
Keyword(s):  
Chemical Composition ◽  
Bottom Sediments ◽  
Anthropogenic Factors ◽  
South Urals ◽  
The Impact ◽  
Natural And Anthropogenic Factors ◽  
Water Bottom

scholarly journals TREE LITTER PRODUCTION AND DECOMPOSITION IN FOREST ECOSYSTEMS UNDER BACKGROUND CONDITIONS AND INDUSTRIAL AIR POLLUTION

2021 ◽  
Vol 4 (3) ◽  
pp. 1-52
Author(s):  
E. A. Ivanova ◽  
Keyword(s):  
Air Pollution ◽  
Chemical Composition ◽  
Forest Ecosystems ◽  
Point Sources ◽  
Anthropogenic Factors ◽  
Litter Production ◽  
Industrial Air Pollution ◽  
Tree Litter ◽  
The Impact ◽  
Natural And Anthropogenic Factors

The paper provides an overview of Russian and foreign articles devoted to the study of the tree litter production and decomposition in forest ecosystems subjected to natural and anthropogenic factors. The spatial variability (below crown and between crown spaces) and the seasonal features of the tree litter production, its chemical composition and decomposition processes are poorly studied. In addition, most of the works, both in native and foreign countries science, highlight the influence of natural factors on the litter production and the processes of its decomposition, while the impact of point sources of industrial air pollution is rarely considered. The study of the variability of the size, fractional and chemical composition and processes of decomposition of tree litter under conditions of industrial air pollution is important for predicting the dynamics of forest ecosystems subjected to the combined action of natural and anthropogenic factors and reducing the negative impact of production processes on forests.

scholarly journals Characteristics of bottom sediments of Lake Widryńskie

2012 ◽  
Vol 12 (4) ◽  
pp. 207-212 ◽  
Author(s):  
Daniel Szymański ◽  
Julita Dunalska ◽  
Michał Łopata ◽  
Izabela Bigaj ◽  
Rafał Zieliński
Keyword(s):  
Organic Matter ◽  
Chemical Composition ◽  
Bottom Sediments ◽  
Dry Weight ◽  
Calcium Carbonates ◽  
Dominant Component ◽  
Littoral Sediments ◽  
The Impact ◽  
Made In ◽  
Profundal Zone

AbstractThe aim of this study was to determine the chemical composition of Lake Widryńskie bottom sediments (max. depth. 27.0 m, area 123.9 ha). The sampling of bottom sediments was conducted once, on 16 August 2010. Sampling was made in 10 specific areas. Among the 10 samples, 4 samples were taken from the littoral and sublittoral zones, while the rest were taken from the profundal zone. The dominant component of the sediments was silica and calcium carbonates were subdominant. Based on the survey, it was determined that silica occurred in greater numbers in littoral sediments, while in sublittoral sediments there was increased participation in the chemical composition of organic matter. The elements that build a capacity complex were a small percentage of the dry weight of sediment. Sediment from the vicinity of inflows contains higher amounts of silica, which confirmed the impact of the catchment on the chemical composition of sediments.

The impact of natural and anthropogenic factors on radial tree growth on the northern Kola Peninsula

2014 ◽  
Vol 7 (7) ◽  
pp. 759-769 ◽  
Author(s):  
T. V. Chernen’kova ◽  
Yu. N. Bochkarev ◽  
M. Friedrich ◽  
T. Boettger
Keyword(s):  
Kola Peninsula ◽  
Tree Growth ◽  
Anthropogenic Factors ◽  
The Impact ◽  
Natural And Anthropogenic Factors

SEABIRD RESTORATION: A REVIEW OF NEEDS AND OPTIONS

1995 ◽  
Vol 1995 (1) ◽  
pp. 860-861
Author(s):  
George J. Divoky ◽  
Craig Harrison
Keyword(s):  
Anthropogenic Factors ◽  
Natural Recovery ◽  
Regular Monitoring ◽  
Factors Influencing ◽  
Limited Role ◽  
Restoration Techniques ◽  
The Impact ◽  
Natural And Anthropogenic Factors

ABSTRACT Seabird restoration plans require reliable estimates of the birds directly affected by a spill and the impact of that mortality on populations. They also require restoration techniques known to increase the rate of natural recovery. Unfortunately, restoration proposals have been hindered by damage assessments based on outdated and/or inappropriate data, exaggerated estimates of damages, and a lack of proven restoration techniques. Regular monitoring of seabird resources, knowledge of natural and anthropogenic factors influencing populations, and recognition of the typically limited role humans can play in seabird restoration will lead to the development of more realistic restoration plans.

scholarly journals Evaluation method of allowable concentration of pollutants considering the state of bottom sediments

2021 ◽  
Vol 958 (1) ◽  
pp. 012017
Author(s):  
D Zhou ◽  
O G Savichev
Keyword(s):  
Chemical Composition ◽  
River Water ◽  
Bottom Sediments ◽  
Evaluation Method ◽  
Solid Particles ◽  
Small Rivers ◽  
Lake Basin ◽  
Water Runoff ◽  
Observation Data ◽  
The Impact

Abstract Considering the dilution of sewage and the interaction between river water and bottom sediments, a mathematical model for the conversion of pollutants in water bodies has been developed. Taking the small rivers in northern Vietnam (Ban Thi River and Dai River in the Red River Basin) as an example, it shows that more than 60% of the chemical composition of the river waters studied is determined by the interaction of the following factors: Co-precipitation of sediments and trace elements on solid particles, and sediments at the bottom of the river. The impact of water runoff is first manifested in the change of solid runoff, and to a lesser extent in the process of regulating the water, which takes longer to establish equilibrium in the solution. On the basis of the proposed model, a simplified version of the model and a standardized pollutant discharge method have been developed for whether there is an option of river water chemical composition observation data. In this case, the influence of interaction with bottom sediments is indirectly considered through the structure of the model and its parameter values. The simplified model was tested with the Jinjiang River in the Poyang Lake Basin as an example.

Toxic Elements Contents and Associated Potential Ecological Risk in the Bottom Sediments of Hrazdan River Under the Impact of Yerevan City (Armenia)

2021 ◽  
Author(s):  
Gevorg Tepanosyan ◽  
Norik Harutyunyan ◽  
Nairuhi Maghakyan ◽  
Lilit Sahakyan
Keyword(s):  
Ecological Risk ◽  
Bottom Sediments ◽  
Toxic Elements ◽  
Risk Index ◽  
Ecological Status ◽  
Contamination Factor ◽  
Potential Ecological Risk ◽  
Anthropogenic Factors ◽  
Pollution Level ◽  
The Impact

Abstract This research aimed to assess the ecological status of the Hrazdan river section flowing through Yerevan. The distribution of toxic elements (Cr, V, As, Zn, Cu, Ni, Co, Mn, Pb, Ti, Mo, Fe, Ba), the bottom sediments pollution level and ecological risks, were assessed employing the contamination factor (CF), enrichment factor (EF), the potential ecological risk index (RI) and geoaccumulation index (Igeo). On sampling sites, water quality parameters (turbidity, DO, conductivity (EC), salinity, TDS, pH, T°C) were measured, as well. The correlation analysis revealed a significant correlation between Zn - Cu, Pb; Cu - Pb, Mo; Co - Fe, Ti pointing out the similar sources and origination of these elements. The results have indicated that the content of the studied elements in the Hrazdan bottom sediments exceed the background content in urban soils, which is due to a set of geological and anthropogenic factors. High contents of elements were determined on sampling sites spatially confined to the residential and industrial areas. According to EF and Igeo data, the priority bottom sediment contaminants are As, Pb, Mo, Zn, V, Cu. The RI value varies from 195.9 to 316.3 with the mean of 245.9 which corresponds to the moderate-level ecological risk. On the whole, a moderate (77.8%) and considerable (22.2%) ecological risk was revealed. An essential source of Pb, Cu, Zn, Mo contents was itentified to be the surface runoffs in urban environment.

scholarly journals On the issue of improving the efficiency of environmental management in the coastal zone of the Onega Lake

2020 ◽  
Vol 163 ◽  
pp. 06010
Author(s):  
Alexandr Sanin
Keyword(s):  
Field Studies ◽  
Anthropogenic Factors ◽  
Onega Lake ◽  
Modeling Methods ◽  
Sources Of Pollution ◽  
Quality Of Water ◽  
Quality Of Waters ◽  
The Impact ◽  
Natural And Anthropogenic Factors

This article is the result of a research conducted in the Zubov State Oceanological Institute during 2014-2019. The research was aimed at studying the coastal dynamics, as well as evaluating the quality of waters of the Onega Lake and the impact of natural and anthropogenic factors on it. Those factors were considered and characterized, the most important of them, in addition to human activity, are the solid flow of rivers and the flow from abrasion processes. Seven types of coasts were identified for the Onega Lake, each of which has its own characteristics of dynamic processes and the impact of natural and anthropogenic factors on water quality. The dynamics of the coasts were analyzed both in the course of field studies and using mathematical modeling methods, which allowed revealing the main tendencies in the dynamics of the coasts. Pollutants entering the Lake and affecting the quality of water are also divided by origin into natural, anthropogenic and mixed genesis pollutants. Special attention is paid to the natural sources of pollution, since they are considered in the available literature to the least extent. Natural origin pollutants include, in particular, the majority of heavy metals, which concentrations for various sites were determined during the research.

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