Article
Article name Ecological and Geochemical Studies in Dalat City, Vietnam, Using the Method of Dendrogeochemistry
Authors Baranovskaya N.V. Doctor of Biological Sciences, Professor, Professor, School of Natural Resources Engineering, nata@tpu.ru
Le Thi Hong Sang .. postgraduate, thihongshang1@tpu.ru
Bibliographic description Baranovskaya N. V., Le Thi Hong Sang. Ecological and Geochemical Studies in Dalat City, Vietnam, Using the Method of Dendrogeochemistry // Transbaikal State University Journal. 2025. Vol. 31, no. 1. P. 8–20. DOI: 10.21209/2227-9245-2025-31-1-8-20
Category Earth and Environmental Sciences
DOI 550.47
DOI 10.21209/2227-9245-2025-31-1-8-20
Article type Original article
Annotation Studying the chemical composition of annual tree rings facilitates effective enviromental monitoring. Dendrogeochemistry represents a range of new approaches that have been developed for purpose of evaluating the trace elements’ accumulation, including rare earth and radioactive elements, which indicate long-term changes in the biosphere. It is important to investigate and comprehend natural and technical processes to evaluate their nagative effects on the natural environment. The data obtained allowed us to assess the influence of local and global processes affecting the specific formation of dendrogeochemical indicators in the territory of the Republic of Vietnam. This research is relevant and pioneering in Vietnam. The object of the research is ecological and geochemical situation of the location of the city of Dalat, Republic of Vietnam. The purpose is identification of the dynamics of changes in the dendrogeochemical parameters of the Dalat pine (Pinus dalatensis Ferré), depending on the ecological and geochemical situation of the territory of the city of Dalat, Republic of Vietnam. Dendrogeochemical methods have identified indicators for the ratios of rare earth and radioactive elements in the natural anomalies found in Dalat city. It has been established that the maximum concentration of chemical elements, including fissile radionuclides, has been recorded in the period from the 40s to the 60s. In general, it has been shown that the elemental composition of bark and wood varied in concentrations of certain chemical elements. The maximum content is related to the presence of natural and technogenic sources, including those corresponding to the period of military conflict. The presence of hot particles in the tree rings indicates the influence of global nuclear engineering factors on the formation of the ecological and geochemical situation of the studied area and tree rings can be used as an indicator of the long-term state in the biosphere.
Key words tree rings, Pinus Dalatenis Ferré, dendrochemistry, instrumental neutron activation analysis, Socialist Republic of Vietnam, indicators of natural and technogenic situation, chemical elements, hot particles, f-radiography, geoecology monitoring
Article information
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