ISSN 1995-4301(Print)
ISSN 2618-8406
(Online)
Current issues:
Online version of the journal
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Select viewing optionsPhenology of the spawning migration start dates of anuran amphibians (Anura, Amphibia) in the river valleys of Saratov Right Bank region |
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| M.V. Yermokhin, V.G. Tabachishin | ||||
| Section: Population ecology |
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| The intra-century dynamics of the spawning migrations start of the three most numerous species of anuran amphibians (Pelobates vespertinus, Bombina bombina and Pelophylax ridibundus) was analyzed. Local populations of the above anurans in the valley of the middle course of the Medveditsa River (Don Basin, Saratov region) were the object of the study. From 1892 to 2023 the phenological norm of this phase of the annual cycle shifted to earlier dates by an average of 7 days for each species in a climate warming. By 2023, the henological norm of the spawning migration start of P. vespertinus, B. bombina and P. ridibundus was April 14, April 21, and April 22, respectively. In addition, the change rate of this phenological parameter in the model species was similar as well, about 8 days/100 years. The absolute value of the phenological norm change, as well as the rate of its transformation, is comparable among the three species of anuran amphibians, despite any differences in their thermobiological characteristics. The early snow clearence in the Northern Lower Volga region may be one of the reasons for shifting the start dates of amphibian spawning migrations to earlier dates. The continued phenological changes in the spring phase of the annual cycle require continued monitoring of this process. This will allow forming scientifically based forecasts of local population dynamics in the future. Possible consequences of this transformation of the spring phenology of anuran amphibians are increased probability of metamorph survival in low water availability in the floodplain, and spawning migration development in the false spring scenario and susceptibility to return cold weather. This is discussed in relation to the changes identified. | ||||
| Keywords: Pelobates vespertinus, Bombina bombina, Pelophylax ridibundus, phenology, spawning migrations |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-191-198 |
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Assessment of the soil and vegetation cover condition of the river basin based on remote sensing data |
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| P.S. Shutov, T.A. Trifonova, N.V. Mishchenko | ||||
| Section: Monitoring of natural and anthropogenically disturbed areas |
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| The aim of this work was to summarize the studies devoted to the soil and vegetation cover assessment of the river basin on the example of the Klyazma River catchment using remote data for a 17-year period. The remote data from the MODIS/Terra+Aqua Land Cover Land Cover, Landsat ETM+ and Meteor with different spatial resolutions were used in the work. The assessment of land use structure dynamics was carried out for the Klyazma River basin as a whole, as well as for individual landscapes. According to MODIS data there is a common trend towards an increase (about 9%) in the area of forest vegetation and a decrease in arable land and pastures for most of the basin. The exception is the interfluve of the Lukh River, where there is a decrease in forest lands and their transition to wetlands. Different landscapes of the Klyazma Rivers basin vary in both the rate and intensity of organic matter accumulation in the form of gross and net primary production as well as respond differently to climatic changes and land use change. However, the unified ecosystem of an entire river basin is more stable compared to its constituent landscapes. The remote sensing data allowed us to establish that the deep valley of the Rpen River (a tributary of the Klyazma River) forms an air flow that carries atmospheric pollution out of the Vladimir industrial zone. | ||||
| Keywords: basin approach, remote sensing, land use structure, phytoproductivity, ecological monitoring |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-073-081 |
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Sources, toxicity and bioaccumulation of rare earths in the environment: review |
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| A.S. Olkova, M.A. Sysolyatina | ||||
| Section: Theoretical problems of ecology |
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| The anthropogenic part of the rare earth elements (REE) cycle is becoming increasingly noticeable due to its increasing mining, using, accumulating in wastes. The aim of the work is to summarize current scientific data of the REE effect on living organisms in different habitats, including the mechanisms and specificity of their action, as well as bioaccumulation. Both REE’s natural geochemical anomalies and anthropogenic polluted zones are known. The REE soil accumulation in industrial areas is up to 2.3 µg/kg; in urban snow the REE content varies from 0.411 µg/kg to 1.463 µg/kg. The REE negative molecular mechanism provokes oxidative stress; the latter can be expressed as stimulation of vital functions at low doses of toxicants, and as inhibition of organisms with increasing concentrations. The REE toxic concentrations depends on the chemical element nature, as well as on set of environmental factors and the exposure target, but they are often 2–3 orders of magnitude higher than those of heavy metals. In the early 21th century, this served as a basis to consider REEs environmentally safety. But many sublethal and delayed effects of REEs including endocrine disorders and negative effects on the breeding potential of populations have now been shown. The complexity of REEs study is due to additive, antagonistic, or synergistic effects of their mixtures and combinations with other elements. Thus, a comprehensive study of rare earth elements remains an urgent task with preventive environmental importance. The vulnerable species identification, REEs delayed effects and the REEs co-action with other substances are the most promising scientific issues. | ||||
| Keywords: rare earth elements, biotesting, bioindication, bioaccumulation, toxic effects |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-019-030 |
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Primary pedogenesis on different texture substrates in post-technogenic ecosystems of the taiga zone |
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| I.A. Likhanova, E.G. Kuznetsova, Yu.V. Kholopov, S.V. Deneva, E.M. Lapteva | ||||
| Section: Remediation and rehabilitation |
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| The paper focuses on the primary soil formation under automorphic conditions in the middle taiga sub-zone of the European North-East of Russia (Komi Republic) on the post-technogenic territories (quarries for the extraction of minerals (construction sand)) with different soil materials (ancient alluvial sands; fluvioglacial sands and sandy loams, moraine loams). In the quarries, the processes of soil formation and vegetation cover development are interdependent and are affected by the properties of soil-forming rocks. Along with the improvement of soil properties (from sandy loam to loam), the biometric parameters of pine stands increase; in the ground cover, dominating lichens are replaced by mosses, and then by grasses. The biogenic accumulation rates of organic matter increase along with the transition of soil material to fine-textured. In automorphic conditions, the accumulation rate of Corg. in soil of sandy quarry under sparse young lichen pine forest reaches 0.1, in sandy loam under young forb-moss pine forest – 0.3, in loam under young grass-forb pine forest – 0.6 t/ha/year. Already in the first succession decades, every study soil demonstrates weakly expressed processes of eluviation and illuviation (the beginning of podzolization). These processes are evidenced by morphological signs (the appearance of bleached quartz grains and whitish patches under organic horizon and in its lower part), redistribution of silicon, iron, and aluminum compounds, as well as of silty particles proportion. | ||||
| Keywords: middle taiga, quarries, primary soil formation, soil carbon, podzol formation |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-122-130 |
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The assessment of potential risks of chloride salts and their effect on seed germination and plant development |
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| L.P. Voronina, V.L. Flerchuk, K.E. Ponogaybo, A.V. Sbitnev, M. Abdelkader | ||||
| Section: Ecotoxicology |
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| The article discusses the negative effect of de-icing materials (DM) and salts in their composition on plant seedlings germination and development. The influence of sodium and potassium cations and chlorine anion on phytotoxicity index is considered. The dynamics of test-plants (Avena sativa L., Raphanus sativa L., Hordeum vulgare L.) response on a number of test-indicators depending on the concentration of basic salts in DM by a promising method of phytotesting was analyzed. The analyzed DMs in concentrations higher than 1% have an inhibitory effect. The DM at 14–16 g/L suppresses root length of test plants (more than 50%) relative to the control. The low content of heavy metals, such as Cd, Cu, Pb, in the analyzed DM samples indicates the toxicity of sodium chloride as an active de-icing agent. The results of statistical analysis convincingly prove the high phytotoxicity of sodium chloride (NaCl) in relation to such indicators of the juvenile test-plant development as germination, the primary root length and the coleoptile height. Increasing the NaCl concentration in the solution from 0.75 to 1% was strongly toxic to the test-plants (more than 50%). Potassium chloride (KCl) in the concentration range of 0.1–1.0% showed no phytotoxicity. The KCl presence in the NaCl-included de-icing reagent reduces its phytotoxicity and allows the toxicity level of the agent to be assessed as “moderately toxic”. | ||||
| Keywords: deicing material (DM), sodium chloride, potassium chloride, seed germination, phytotoxicity, salinity |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-156-165 |
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Cyanobacteria and Algae in the Karlamanskaya Cave (Bashkortostan Republic, Russia) |
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| M. Yu. Sharipova, I.Е. Dubovik | ||||
| Section: Population ecology |
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| The article presents data on the composition and structure of cyanobacterial-algal cenoses of various habitats of the Karlamanskaya Cave. The study identified 46 species and intraspecific taxa of cyanobacteria and algae belonging to 5 divisions (Cyanobacteria – 17 species and intraspecific taxa, Bacillariophyta – 12 species and intraspecific taxa, Chlorophyta – 14 species, Charophyta – 1 species, Ochrophyta – 2 species), 7 classes, 16 order, 28 families and 36 genera. Leptolyngbya boryana (Gom.) Anagn. et Kom., Oscillatoria rupicola (Hansgirg) Hansgirg ex Forti, Luticola mutica (Kütz.) Mann, Mychonastes homosphaera (Skuja) Kalina et Punс., Chlorella vulgaris Beijerink present the dominant complex of cyanobacteria and algae in all studied habitats. Cyanobacteria dominate in all biotopes of the cave except aquatic ones where diatoms predominated. The maximum number of species was found in the soil at the cave entrance and in the soil of the illuminated cave zone: 31 and 29 species respectively. The lowest number was found in the soil and on the walls (16 and 11 species respectively). Ecological analysis of cyanobacterium and algae revealed 12 life forms: Сh9B9P5X5CF5hydr4amph2PF1NF1C1M1H1. Most of the life forms were found in the illuminated cave zone: in the soil (10 forms), on the wall (10 forms) and at the cave entrance (11 forms). The ecobiomorphs composition of the dark zone is the poorest (5 forms). | ||||
| Keywords: karst cave, cyanobacteria-algal cenoses |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-184-190 |
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Comprehensive assessment of the ecological state of the transboundary Narva River |
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| T.V. Kuznetsova, A.B. Manvelova, Y.M. Polyak | ||||
| Section: Monitoring of natural and anthropogenically disturbed areas |
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| A comprehensive study of the ecological state on the transboundary Narva River (Russia –Estonia border) downstream of Ivangorod, Kingisepp District, Leningrad Region, was carried out. It included the determination of chemical indicators of pollution of the natural river water, with an emphasis on some heavy metals content in water, sediments and soft tissues of local filter-feeding mollusks; the latter were used as bioindicators of river pollution in this location. Zn was determined in maximum concentrations in bottom sediments, then Cu, to a lesser extent Pb, Cd and Ni. The coefficient of metal bioconcentration calculated in soft tissues of mollusks showed maximum for Zn and Cu, to a lesser extent for Pb, Cd and minimum for Ni. However, such values have no negative effect on local biota as shown by physiological testing of bivalves from study site. The functional assessment of bivalves by non-invasive cardiac rhythm recording made it possible to characterize their functional status and adaptive capabilities as good. The relative abundance of hydrocarbon-oxidizing bacteria in the digestive tract of mollusks from the Narva River has been determined as an indicator of environmental pollution by oil products. It was noted that the number of hydrocarbon-oxidizing bacteria does not exceed the values characteristic of the reference waters of the Eastern Gulf of Finland. Based on the totality of the studies, it was concluded that the river waters in the studied location can be characterized as slightly polluted and its ecological status as of a good quality. | ||||
| Keywords: comprehensive assessment of the ecological status, chemical indicators of water quality, heavy metals in sediments and tissues of mollusks, hydrocarbon-oxidizing bacteria, functional status of bivalves |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-064-072 |
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Toxic effect of ciprofloxacin on the photosynthesis reactions in microalga Scenedesmus quadricauda (Turp.) Bréb. |
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| D.N. Matorin, N.P. Timofeev, A.D. Batakov, D.A. Todorenko, T.K. Antal | ||||
| Section: Ecotoxicology |
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| Ciprofloxacin (CIP) is widely used broad-spectrum antimicrobial drug of fluoroquinolone family. The widespread use of ciprofloxacin increases its release into the environment. Ciprofloxacin is detected in aquatic ecosystems potentially harming aquatic organisms. The CIP effect on photosynthetic organisms is not fully studied. In this study we examined the CIP effect on green freshwater microalgae Scenedesmus quadricauda (Turp.) Bréb. using chlorophyll fluorescence methods (JIP test parameters and rapid light curves). A significant decrease in the cell number was observed at ≥10 mg/L of сiprofloxacin in comparison with control. Analysis of chlorophyll fluorescence parameters obtained from OJIP transients revealed the changes in photosynthetic reactions in сiprofloxacin treatment. Ciprofloxacin was found to inhibit electron transport rate in photosystem II (PSII). The decrease in the quantum yield of electron transport in photosystem II (φEo) was accompanied by the decrease in performance index (PIABS) and an increase in energy dissipation (DI0/RC). Ciprofloxacin enhanced the photosensitivity of microalgae but did not inhibit the recovery of photosynthetic activity after the photooxidative stress. In this regard the effect of CIP differs from that of the well-known antibiotic chloramphenicol that inhibits the resynthesis of plastid proteins and, accordingly, the recovery of photosynthetic activity associated with the resynthesis of PSII protein D1. Among the fluorescence parameters, PIABS was found to be the most stress-specific; therefore it can be proposed to detect an early toxic CIP effect in microalgae. | ||||
| Keywords: ciprofloxacin, Scenedesmus quadricauda, chlorophyll fluorescence, photosynthesis, bioassay |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-150-156 |
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Photodegradation of polylactide with phenol and aniline terpene derivatives additives |
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| V.A. Belyy, I.M. Kuzivanov, I.V. Fedorova, O.A. Shumova, E.M. Tropnikov, E.I. Istomina, I.Yu. Chukicheva, A.V. Kuchin | ||||
| Section: Ecologization of industry |
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| The article is devoted to the development of new photostabilizers of polylactide, a polymer that is an environmentally friendly alternative to fossil-based polymers. The new photostabilizers are designed to extend the life of products when exposed to ultraviolet radiation and maintain the performance of the polymer when recycled. Photostabilizers 2-isobor-nylphenol and N-para-mentenaniline were obtained while the available natural monoterpene camphene alkylation of phenol or aniline. Irradiation of polylactide samples with a photostabilizer was carried out by radiation with 253,7 nm wavelength for 4 h. The effectiveness of the photostabilizer was evaluated on the basis of IR spectrometric data, as well as by scanning electron microscopy and simultaneous thermal analysis. The introduction of each of the selected stabilizers at the concentration of 0.05% by weight resulted in the protection of ester bonds between the monomer units of the polymer. However, 2-isobornylphenol was more effective. The IR spectra analysis of the irradiated samples revealed a 15% decrease in the absorption intensity of the characteristic bands of the ester groups in the sample with 2-isobornyl-phenol, 46% in the sample with N-para-mentenaniline, and 50% in the sample without stabilizer addition. Thus, the use of 2-isobornylphenol as a photoprotective additive will extend the service life of polylactide plastic products under exposure to aggressive UV-C radiation. The protection of polylactide from UV radiation opens up prospects for expanding the areas of application of polylactide, a polymer synthesized from renewable raw materials. | ||||
| Keywords: bioplastics, photodegradation, polylactide, photoprotectors |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-106-112 |
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Fire frequency index of linden forests in the Jewish Autonomous Region |
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| A.M. Zubareva, T. A. Rubtsova, V.A. Zubarev | ||||
| Section: Monitoring of natural and anthropogenically disturbed areas |
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| Based on expeditionary work in the period 2003–2018 we compile a map of linden forests locations in the Jewish Autonomous Region (JAR). An inventory map of forest fires was created using data on forest fire registration of the Forest Management Department of the JAR Government for 2017–2020. The number, area, and configuration of the burned areas were determined by superimposing of these maps. The analysis of fire-damaged forests shows that during the study period fires were observed in all forest formation with linden. Their total number was 174. The most of fires (33%) noted in 2018 and the fewest (15%) – in 2017. The average annual number of fires in 2017–2020 was 44. The largest area affected by the pyrogenic factor was observed in 2018. The smallest area (7.5%) of linden forests were fire-transformed in 2020. The average area of one fire is 653 hectares. This corresponds to 64% of the total fire-affected area in the studied vegetation formations. The black birch and oak park-type forests, sometimes with linden, larch, with silverspike-and-forbs cover and forbs-and-pinegrass meadows were most affected by fire. We analyzed the spatial distribution of the fire-damaged forests and established its main patterns as well as identified the areas of repeated burnout. In the most of the JAR linden forests fires have a one-time character. Local areas are subject to multiple burnout; the causes of their high multiple ignition require further study. In this regard, forest fires is a factor that significantly contributes to the reduction of the honey-bearing lands of the JAR. | ||||
| Keywords: forest fires, fire frequency index, linden forests, Russian Far East |
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| Article published in number 1 for 2024 DOI: 10.25750/1995-4301-2024-1-090-096 |
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36, Moskovskya street, Kirov, 610000, Editorial Board "Theoretical and Applied Ecology." Phone/fax: (8332) 37-02-77 e-mail: envjournal@vyatsu.ru The journal was founded in 2007 |
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