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Effect of Chromium and Other Heavy Metals on Microalgae
(2018-01-03)
Gulzina Yernazarova
;
Svetlana Kazbekovna Turasheva
;
Gulnur Omarova
This article is devoted to the identification of physiological and biochemical features of the influence of chromium and heavy metals (HM) on microalgae. The chromium-accumulating ability of some microalgae and influence of HM on the physiological-biochemical parameters of microalgae in monoculture and mixed cultures are shown. The allelopatic relationships of microalgae and their influence on the processes of chromium and HM absorption are considered Microalgae A. flos-aquae, A. arnoldii, N. linckia, C. paryethina actively absorb chromium from the culture medium are shown. The greatest absorption of chromium and HM occurs in microalgae cultures with positive allelopathic interference: A. flos-aquae, A. arnoldii, A. flos-aquae, N. linckia. In this article discusses the results of experiments with test-objects of different trophic levels. The unicellular algae is the most sensitive group of organisms to potassium dichromate that is shown. Particularly emphasized is the chromium accumulating capacity of certain plant objects, including microalgae. In studies on the effects of harmful substances on aquatic organisms, potassium dichromate is used as a reference toxicant. Their brief characteristics, pathways and migration, including intracellular and extracellular detoxification of HM ions, are given. The results of investigations are that physiological and biochemical processes of microalgae in conditions of environmental contamination with chromium ions have a general biological significance and can be used for the study of phytoremediation, ecological physiology and biotechnology. The data obtained in the research can be used to develop methods for biological treaHMent of wastewater and closed water systems contaminated with chromium.
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Soil morphological and chemical characteristics in the habitats of the rare, endemic plant Spiraeanthus schrenkianus in Karatau Mountains, Kazakhstan
(Instituto Internacional de Ecologia (Brazil), 2025-01-01)
A Muratbayeva
;
Akmaral Nurmahanova
;
Канат Кулымбет
;
A. T. Myltykbayeva
;
Aigul Аkhmetova
BACKGROUND: The article presents the results of the study of ecological characteristics of soils of three populations on the territory of Karatau. The populations were located in different geographical points with differences in soil types, depth of horizons and content of chemical elements. The study evaluated the main soil parameters including humus content, pH, CO2, macro- and microelements, and salinity level. It was found that population-1 (mountain gray-brown soils) was characterized by the highest content of humus and mobile nitrogen, indicating better availability of nutrients to plants. population-2 (mountain southern serozems) has higher potassium content, which is favourable for plant growth. population-3 (mountain gray-brown soils) showed the lowest content of mobile phosphorus and copper compared to other populations. Analysis of heavy metal concentrations showed that zinc exceeded the maximum permissible concentration only in population-2. At the same time, soil salinization at all three sites remains at a low level and does not pose a threat to the ecosystem. These findings are ecologically significant as they reveal the critical role of soil fertility and contamination in supporting the distribution and survival of the rare endemic species Spiraeanthus schrenkianus. These results provide new information for assessing the fertility and sustainability of land resources.
Цитирования (OpenAlex) 4Цитирования (OpenCitations) 1

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