The effect of tree roots on the redistribution of 137Cs in the soils of pine and birch forests of the radioactive contamination zone

Scheglov, A. I.; Цветнова, О. Б.; Попова, Е. П.

doi:10.3103/s014768741602006x

Cited by 4 publications

(4 citation statements)

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“…The contamination of trees with 137 Cs is the result of different processes such as uptake by the root system, internal translocation and immobilization [25]. Cesium is strongly accumulated by tree roots, especially by birch roots [8,26]. The differences in the greater activity of cesium in birch wood than in pine can be explained by the fact that deciduous trees generally show a greater tendency to branching roots than conifers [27,28], which results in a larger surface for uptake of substances from the soil.…”

Section: Discussionmentioning

confidence: 99%

Activity of 137Cs and 40K Isotopes in Pine (Pinus sylvestris L.) and Birch (Betula pendula Roth) Stands of Different Ages in a Selected Area of Eastern Poland

Strzałek

Barczak²,

Karwowska³

et al. 2021

Forests

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Research Highlights: a forest is an ecosystem that allows for the assessment of radioactive contamination of the environment over several decades. (1) Background and Objectives: measurements of the activity of the 137Cs isotope in various elements of a forest ecosystem are one of the most important parameters in the assessment of radioisotope contamination. The translocation of 137Cs in the environment is determined by the activity of the natural 40K isotope in soil. The activities of 137Cs and 40K isotopes were assessed in two stands of Betula pendula and Pinus sylvestris, differing in age (30, 50, and 80 years old); (2) Materials and Methods: the research was conducted in one of the forest districts of eastern Poland. Wood, litter, and soil were collected for the tests from the sampling sites. The activity of 137Cs and 40K was determined using the γ-spectrometric method. Based on the activity of these isotopes in wood and soil, the values of translocation factors (TF) were determined; (3) Results: the highest activity of 137Cs was recorded in the wood of the oldest stands, the growth period of which coincided with the time period of intensive testing with nuclear weapons. With the growing age of the stand, the value of TF 137Cs increased, while the value of TF 40K was not dependent on the age of the stands. Birch wood accumulated more 137Cs and 40K isotopes than pine wood. (4) Conclusions: the results show a much greater radioactive contamination of the environment in eastern Poland during the testing with nuclear weapons than after the Chernobyl nuclear reactor explosion. The greater accumulation of radiocesium in birch wood than in pine wood predisposes this species to be more useful when assessing the radioactive contamination of the environment from the past.

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Section: Discussionmentioning

confidence: 99%

Activity of 137Cs and 40K Isotopes in Pine (Pinus sylvestris L.) and Birch (Betula pendula Roth) Stands of Different Ages in a Selected Area of Eastern Poland

Strzałek

Barczak²,

Karwowska³

et al. 2021

Forests

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“…We will not elaborate on the point, but just mention that the model was created based on information obtained in the course of our work in the 30 Kilometer Zone around the site of Chernobyl nuclear reactor accident in 1986-1993 and involved the literature data of other researchers. Our own field and laboratory data, pertaining to a long term following the accident, were utilized as a module in the EcoradOak_CS_FW trophic web with the view to adjust the module parameters and additionally check on its performance for further the use of the EcoradOak_CS model [13,17,[29][30][31][32].…”

Section: Algorithm Of 137 Cs Transfer In Food Web Of Ecoradoak_cs_fw Simulation Modelmentioning

confidence: 99%

Simulation Model of 137Cs Daily Dynamics in the Food Web of the Deciduous Forest Ecosystem

Mamikhin

Badawy

Lipatov

et al. 2021

Moscow Univ. Soil Sci. Bull.

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The simulation model of seasonal dynamics of 137 Cs in the components of the oak forest ecosystem EcoradOak_CS_FW has been further developed, which now includes first-and second-order consumers. The radiocesium redistribution is modeled in a full-scale food web of a forest ecosystem of the soil-vegetation-herbivores-predator type. The algorithm used in the model allows us to take into account the effects of the soil, meteorological, phenological, and physiological factors on the behavior of radionuclide in the food web and predict radiological situations under various conditions of radioactive fallout. Data obtained with the model on the contamination of animals with radiocesium are used to calculate the dynamics of the internal dose. The results of modeling can be used in the rationing of forest products of deciduous forests. The model is also applicable to the study of potassium redistribution in the trophic chain of a deciduous forest ecosystem.

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“…It is known that the distribution of the specific activity of radiocaesium in the soil profile changes over time, due to a number of factors, among which the biogeocenosis type and its vegetation play a significant role. The factors influencing the radionuclide distribution in soil and in natural ecosystems as a whole have been considered by many scientists [1][2][3][4][5]13]. Information on the participation of plant roots in this process is limited to a quantitative assessment of the contribution of dieback of a root system [6,9,10,13].…”

Section: Introductionmentioning

confidence: 99%

“…The factors influencing the radionuclide distribution in soil and in natural ecosystems as a whole have been considered by many scientists [1][2][3][4][5]13]. Information on the participation of plant roots in this process is limited to a quantitative assessment of the contribution of dieback of a root system [6,9,10,13]. Some studies indicate the importance of the compounds of root exudates in migration and demonstrate the possibility of movement of elements along the surface of the roots [7][8][9]11].…”

Section: Introductionmentioning

confidence: 99%

Some Indicators of the 137Cs Intake in Nutrient Solution with Root Exudates of Norway Spruce (Picea abies) in a Model Experiment

Попова

Shcheglov

Komarov

2018

Moscow Univ. Soil Sci. Bull.

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This study presents the results of a model experiment with Picea abies determining the role of root exudates in the intake of radiocaesium into soil solution. It has been established that the amount of consumed 137 Cs depends on the weight of the root system, with the majority of the radionuclide presumably accumulating in the primary cortex of the root; i.e., it was not redistributed further between the structural components of the plant. The amount of 137 Cs entering the aerial part is approximately 2.5% of its total storage in the plant. During the experiment (7 days), 37.4-53.8% of the radionuclide accumulated in the assimilating organs were transported into pure solution with root exudates and the radiocaesium storage transported into the solution exceeded that of the roots. The movement of 137 Cs in the aqueous film on the surface of the root systems have not been recorded.

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The effect of tree roots on the redistribution of 137Cs in the soils of pine and birch forests of the radioactive contamination zone

Cited by 4 publications

References 1 publication

Activity of 137Cs and 40K Isotopes in Pine (Pinus sylvestris L.) and Birch (Betula pendula Roth) Stands of Different Ages in a Selected Area of Eastern Poland

Activity of 137Cs and 40K Isotopes in Pine (Pinus sylvestris L.) and Birch (Betula pendula Roth) Stands of Different Ages in a Selected Area of Eastern Poland

Simulation Model of 137Cs Daily Dynamics in the Food Web of the Deciduous Forest Ecosystem

Some Indicators of the 137Cs Intake in Nutrient Solution with Root Exudates of Norway Spruce (Picea abies) in a Model Experiment

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