Study of the anatomical and morphological features of the photosynthetic apparatus of Tilia cordata Mill. showed that the volume of leaf mesophyll cells in an urbanized environment is higher than in natural plantings. The cells of the palisade mesophyll of the leaf have a greater variability of this indicator during the growing season as compared to the cells of the spongy mesophyll. Positive correlations of the indicator of the volume of cells of the palisade mesophyll with the indicator of the air pollution index, the content of phenol, formaldehyde, benzo(a)pyrene and negative correlations with the content of nitrogen dioxide were noted. The indicator of the volume of cells of the leaf spongy mesophyll positively correlates only with the indicator of the atmospheric pollution index and the content of formaldehyde.
Of the goal of study is to investigate the formation of such skills of strengthening of practical component of environmental training of students, having technical specialization. It is achieved by the introduction of such forms and methods of training,as the research of technical projects and scientific articles in the subjected area (using the method of diversionary analysis), the participation of students in the work of scientific departments at the enterprises, in eco-oriented production practice and in the interdisciplinary designing. The results of the experiment show a positive dynamics in the changes of formedness levels of the main characteristics of the students' ecological culture, and confirm the effectiveness of introduction the considered.
The article presents the results of a research of the mesostructural indicators of small-leaved linden leaves in different ecological types of urban plantations. The research was carried out in Naberezhnye Chelny, one of the leading centers of machine building in Russia, where the township-forming enterprise is PJSC “Kama Automobile Plant”. Small-leaved linden is widely used in landscaping of the city. Under the urban environment small-leaved linden exhibits significant increases in anthropogenic load (mainly, with an increase in the API value and formaldehyde content), the number of mesophyll cells and their linear sizes increase.
The article considers one of the aspects of anthropogenic impact on river ecosystems – the accumulation of pollutants in bottom sediments. The authors analyze the state of small rivers, the study of which is not given enough attention, while their importance for maintaining the ecological well-being of local territories and the formation of their biological diversity can hardly be overestimated. The bottom sediments of two rivers (according to V.L. Rokhmistrov’s classification - the smallest and small) are being investigated for the content of heavy metal ions; the granulometric composition of sediments and the content of organic matter in them are also determined. The results of the study indicate the presence of some regularities in the distribution of certain metals in bottom sediments of the river core, heavy pollution of sediments with mobile forms of heavy metals and their possible impact on the ecological state of its own drainage basin and the state of the large river fed by them.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.