scholarly journals Accumulation of heavy metals in birch and pine forest roadside phytocenoses in the south of Tyumen region

2018 ◽  
Vol 26 (3) ◽  
pp. 233-238
Author(s):  
E. I. Popova
Keyword(s):  
Heavy Metals ◽  
Plant Communities ◽  
Betula Pendula ◽  
Absorption Efficiency ◽  
Pine Forests ◽  
The South ◽  
Natural Ecosystems ◽  
Complex Investigation ◽  
Betula Pendula Roth ◽  
The Stability

We conducted a complex investigation of anthropogenic roadside phytocoenoses. For the study, 8 plots (birch and pine forests) were selected, close to roads in the south of Tyumen region within the five administrative districts: Uporovsky, Zavodoukovsky, Yalutorovskiy, Yarkovsky, and Tobolsk. As a result of the studies, 75 species of vascular plants from 21 families were noted in the plant communities. It was found that the majority of the total projective cover of the plant communities was provided by synanthropic species. In the synanthropic fraction of the flora, 33 species belonging to 11 families were identified, those with the most species being: Scrophulariaceae, Compositeae, Rubiaceae, Poaceae, Fabaceae, Polygonaceae, Umbellíferae. The index of synanthropization of the flora of the studied phytocenoses is in the range from 43% to 64%. Among the identified pollutants accumulated in the phytocenoses, the group of heavy metals was identified (Cr, Cu, Ni, Pb, Sr, Zn). Needles of Pinus sylvestris L. mainly accumulate Cr, Cu, Ni, Sr. The greatest concentration of Pb and Zn was found in the leaves of Betula pendula Roth. The content of other heavy metals in the leaves of Betula pendula Roth. during the growing season was relatively stable. Accumulation of heavy metals in the studied components of forest ecosystems can be displayed structurally: soil > leaves < phytomass (birch forests), soil < needles > phytomass (pine forests). Methodological approaches to conducting a complex of long-term observations of natural ecosystems have been formulated, substantiated and justified. To evaluate the absorption efficiency of heavy metals, the biological absorption coefficient was calculated. The obtained results can be used as a control in the study of migration and accumulation of heavy metals and for assessing the degree of anthropogenic load on phytocenoses of roadside ecosystems and predict the extent of probable changes in them. The forecast of the results will facilitate the elaboration of a necessary system of measures aimed at increasing the stability of plant communities.

scholarly journals A comparative evaluation of the fluctuating asymmetry of the leaf blade Betula pendula Roth for different methods of plant material fixation

2020 ◽  
Vol 9 (4) ◽  
pp. 58-65
Author(s):  
Tatyana Valerievna Zhuikova ◽  
Anastasia Sergeevna Popova ◽  
Eleonora Vasilievna Meling
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Fluctuating Asymmetry ◽  
Plant Material ◽  
Betula Pendula ◽  
Natural Increase ◽  
Second Order ◽  
Alcohol Solution ◽  
Middle Urals ◽  
Betula Pendula Roth

The influence of plant material fixation methods on the index of fluctuating asymmetry of Betula pendula Roth leaves is determined. The methods used were herbarization under pressure and leaves fixation in a solution of ethyl alcohol (45%). Biological material was collected in natural phytocenoses of the Pritalskaya zone of the Middle Urals and in technogenically formed territories, including soil contamination with heavy metals. The FA level of Betula pendula Roth leaf blades obtained on freshly harvested material increases in the gradient of toxic load and reflects a natural increase in soil contamination with heavy metals (Zn, Cu, Pb, Cd, etc.). The smallest deviation from the actual FA values obtained on freshly harvested material is given by a method of herbarization of leaves. The correlation coefficients are 0,940,99. Plant material fixation in an alcohol solution leads to more than 10-fold deviation of FA values from the real ones. The correlation between the studied morphological parameters of fresh and alcoholic leaf blades is 0,170,70. The signs distance between the bases of the first and second veins of the second order from the base of the leaf and angle between the main vein and the second vein of the second order from the base of the leaf are more distorted. Correction coefficients are proposed that allow to level out the differences in the FA level between the results obtained on freshly collected material and recorded by different methods. For the herbarization method, regardless of where the plant material is collected, the correction factor to be entered for the FA values of the fixed leaf blades is () 0,0004. For the method of leaves fixation in an alcohol solution, the coefficient value is () 0,00075 for material collected in undisturbed communities, and (+) 0,0045 for technogenically disturbed communities.

The effect of mixed rot from the present tinder (Fomes fomentarius (L.:Fr.) Gill.) on the accumulation of heavy metals in the hanging birch (Betula pendula Roth.)

2021 ◽  
Author(s):  
S.S. Gnusarev ◽  
N.A. Mitrofanova ◽  
B.P. Churakov
Keyword(s):  
Heavy Metals ◽  
Betula Pendula ◽  
Betula Pendula Roth ◽  
Fomes Fomentarius ◽  
Cobalt Iron ◽  
Copper Zinc ◽  
Cadmium Lead ◽  
Zinc Nickel ◽  
Nickel Cadmium

A study was conducted on the effect of mixed rot from the present tinder on the accumulation of heavy metals (copper, zinc, nickel, cadmium, lead, cobalt, iron) by hanging birch Keywords: real tinder, mixed rot, heavy metals, hanging birch.

scholarly journals Distribution of heavy metals in plant communities of the West Siberian Arctic and Subarctic

2021 ◽  
Vol 284 ◽  
pp. 01009
Author(s):  
Elena Popova
Keyword(s):  
Heavy Metals ◽  
Plant Communities ◽  
Natural Ecosystems ◽  
The West ◽  
Low Concentrations ◽  
Siberian Arctic ◽  
Accumulation Of Metals ◽  
Long Time ◽  
High Concentrations ◽  
Excessive Accumulation

The paper presents the results of comprehensive studies on the problem of formation of a deposit of heavy metals in plant communities of the West Siberian Arctic and Subarctic. The regularities of the concentration and redistribution of heavy metals in the soil-plant system have been revealed. Excessive accumulation of heavy metals by different plant species is limited by the selectivity of root absorption in relation to certain elements, and therefore it is important to calculate the coefficient of biological absorption. The interrelation between the intensity of recreational loading and change in the nature, grass cover structure.Among the identified pollutants that accumulate by plants identified a group of heavy metals and microelements (Pb, Sr, Cu, Zn, Ni ). It is shown that the linear dependence of the accumulation of metals in the system “soil-plant” is observed only in the range of low concentrations of pollutants in the ground growing. With high concentrations the reverse dependence occurs. Formulated, justified and tested methodical approaches to preparation of complex long-time observations of the natural ecosystems.

scholarly journals Feeding of the willow leaf beetle Lochmaea capreae L. (Coleoptera, Chrysomelidae) on leaves of birch (Betula pendula Roth) contaminated by heavy metals

2012 ◽  
Vol 50 (No. 3) ◽  
pp. 109-117 ◽  
Author(s):  
L. Rokytová ◽  
E. Kula ◽  
L. Kodarová ◽  
A. Pešlová
Keyword(s):  
Heavy Metals ◽  
Betula Pendula ◽  
Leaf Beetle ◽  
Repellent Effect ◽  
Betula Pendula Roth ◽  
Laboratory Conditions ◽  
Willow Leaf Beetle

The effect of contamination of birch (Betula pendula Roth) leaves with heavy metals on the feeding of imagoes of the willow leaf beetle (Lochmaea capreae L.) was studied under laboratory conditions. The imagoes preferred feeding on leaves less contaminated by Cd, Mn and Zn. The Pb content was tolerated on all the studied levels. The repellent effect of Zn 8,000 &micro;g/mlin the Pb + Zn regime was compensated by Pb 500 <sup>&nbsp;</sup>in relation to Mn 10,000

scholarly journals Fluctuating asymmetry of silver birch Betula pendula Roth in industrial and recreational zones of the South-West of St. Petersburg

2020 ◽  
Vol 215 ◽  
pp. 03002
Author(s):  
Grigorii Kozlov ◽  
Mikhail Pushkarev ◽  
Anastasia Trubnikova ◽  
Anastasia Goreva ◽  
Miroslava Ivanova ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Fluctuating Asymmetry ◽  
Betula Pendula ◽  
Silver Birch ◽  
The South ◽  
Betula Pendula Roth ◽  
South West ◽  
Industrial Zones

The paper contains information on the fluctuating asymmetry of the silver birch in the recreational and industrial zones of the South-West of St. Petersburg. It is proposed to use the fluctuating asymmetry of silver birch to substantiate the choice of locations for isolating promising strains - destructors of toxic organic pollutants.

scholarly journals Raspodjela teških metala (Cd, Pb, Hg, As) i esencijalnih elemenata (Fe, Se) u šumskom tlu i biljnim zajednicama državnog otvorenog lovišta ˝Krndija II˝ XIV/23

2016 ◽  
Vol 140 (3-4) ◽  
pp. 153-153
Author(s):  
Neška Vukšić ◽  
Marcela Šperanda
Keyword(s):  
Heavy Metals ◽  
Plant Communities ◽  
Acid Soils ◽  
Essential Elements ◽  
Habitat Conditions ◽  
Natural Ecosystems ◽  
Ground Flora ◽  
Naturally Occurring ◽  
Maximum Permissible Concentrations ◽  
Main Factor

Elements such as Pb, Cd, Hg, and As, are an integral part of the biosphere, they do not decompose but circulating in nature in different oxidation and chemical forms. Human activity increases the naturally occurring levels of these elements in the environment. Wild animals that live in natural ecosystems are particularly exposed to the various environmental factors. The environment is the main factor that determines health status and population of wildlife. Therefore, the aim of this study was to determine the concentration of heavy metals (Cd, Pb, As and Hg) and essential elements (Fe and Se) in the soil and plant communities of the forests (litter and ground flora) in habitat conditions for two years. In the state open hunting area ˝KRNDIJA II˝ XIV/23 was taken 14 samples of soil and samples of litter and ground flora from four areas of hunting grounds. We performed a chemical analysis of the soil and analysis of heavy metals (Pb, Cd, As, Hg) and essential elements (Fe, Se) in samples of soil, litter and ground flora. It was found that the area of research is characterized by acid soils that are medium humus to humus, poor in potassium and phosphorus and medium provided with iron and deficient with selenium. The determined concentrations of heavy metals in soil were lower than the maximum permissible concentrations. Increased concentrations of cadmium and lower concentrations of iron and selenium from the desired concentration was determined in samples of litter and ground flora.

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