Bryophytes possess a wide ecological diapason allowing them to populate substrates of technogenic origins which are scarcely suitable or completely unsuitable for viability of vascular plants. 49 bryophyte species, which belong to 2 divisions, 3 classes, 8 orders, 17 families, and 33 genera have been found on the dump territory of sulphur extraction of the mining-chemical enterprise “Sirka” (Yavoriv district, Lviv region). Seven transects, three on the north slope (base, slope, top), three on the south slope and one on the plateau were laid for sample selections. 20 investigated 0.5 × 0.5 m plots located 2 m apart were analyzed within each 10 × 10 m transect. Specific composition, life forms, projective cover, biomass of bryophytes, numbers of male, female and sterile plants, moisture content in the turfs, pH and physiological investigation of mosses were determined on each plot. The quantitative analysis of the biomorphological structure allowed us to establish the dependence of the spread of life forms on exposition and slope height; essential variability of the projective cover and moss biomass. Bryophyte cover plays an essential part in optimization of the moisture regime and surface layer temperature of technogenic substrates, improving the conditions of growth localities. We established that on the dump the dominant moss species are dioecious with a high level of reproductive effort (sexual and sexless), with short ontogenesis and age of first reproduction, which provides the chance to produce the maximum number of progeny in the minimum period and to form a complete moss cover. The analysis of seasonal moss photosynthesis dynamics has demonstrated the adaptability of moss photosynthetic apparatus to contrasting climatic conditions and the ability to support the intensity of photosynthetic processes on a rather stable level during the vegetative period. Our research showed that bryophytes play an important role in productivity of plant cover on the post-technogenic territories of sulphur extraction. It was found that bryophytes play a role in accumulation of organic carbon and biogenic elements in the substrate of the sulphur extraction dump . Carrying out research of specific composition dynamics and species activity is the precondition for revealing the essence of the dynamic processes taking place in the structure of the bryophyte communities on devastated territories and the influence of these processes on the formation of vegetation on dump complexes.
Медицинская этика-основа духовно-нравственного воспитания в медицинском ВУЗе Со времен Гиппократа общепризнано и бесспорно, что «нравственная культура врача-это не просто заслуживающее уважение свойство его личности, но и качество, определяющее его профессионализм». К особенностям
Роль православия в духовно-нравственном воспитании врача Нельзя представить современное понятие о нравственной личности без понимания того, что истоки его лежат в истории возникновения мировых
The tolerance of vegetative and generative clones of mosses of B. argenteum and F. hygrometrica from background and anthropogenically transformed territories to the influence of heavy metal ions was experimentally investigated. It has been established that the increase of the resistance of moss to the influence of heavy metal ions occurs through the activation of growth and physiological-biochemical processes. The level of adaptability of mosses depended on the concentration of toxic ions, the growing environment, and the vital strategy of the moss. It was established that with increasing concentration of lead ions in the environment, the generative propagation of mosses was suppressed, the percentage of germination of spores decreased, the differentiation of protonema and the speed of gametophore development slowed down, the size of cells, number and size of leaves decreased. Obviously, under the influence of elevated lead concentrations, significant changes in metabolic processes occurred in moss cells and showed signs of xeromorphism. The results of the analysis of the rates of gametophyte differentiation and the state of the antioxidant system of mosses B. argenteum and F. hygrometrica, depending on the content of heavy metal ions, show different adaptive capacity. Changes in the rate of gametophyte differentiation and the activity of superoxide dismutase and catalase antioxidant enzymes have been shown to be sensitive biomarkers of the resistance of generative and vegetative moss clones to heavy metal contamination of man-made territories.
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