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1

Juniperus communis L. at the southern limit of its distribution in Eastern Polesie

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Lukash O., Buzunko P., Kyriienko S., Sliuta A.
Ecological Questions
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2017
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tom 25
The authors investigated the occurrence of Juniperus communis in different vegetation syntaxa at the southern limit of its distribution in Eastern Polesie: pine forest communities representing the associations Peucedano-Pinetum W. Mat. (1962) 1973, Cladonio-Pinetum Juraszek 1927, Veronico incanae-Pinetum Bulokhov et Solomeshch and oak-pine forests – the Querco-Pinetum association (W. Matuszkiewicz 1981) J. Matuszkiewicz 1988.New localities of J. communis were found for the first time in Eastern Polesie. The largest populations of the species (in terms of area covered and the number of individuals) in Eastern Polesie occur in the territory of Ukraine (Pridesnyansky physical-geographic region) and Russia (Nerusso-Desnyansky and Snovsky physical-geographic regions). In Eastern Polesie, the population of the spe- cies occupies the largest area (22 ha) in the Klimovo forest district (Bryansk region, Russia), and is characterised by the dynamic equilibrium between the death and replacement of individuals.The southern limit (in Eastern Polesie) of the distribution of communities with J. communis codominance was established in the course of the study. It passes through the villages Brahlov–Razlyoty–Ochkino–Navlya. J. communis occurs sporadically south of the distribution limit and shows signs of climate impact: seedlings and juvenile plants are absent, while reproductive individuals are characterised by very low seed production
2

The mechanical degradation of land surface and the present state of the loess “islands” plant cover of Chernihiv Polesie (Ukraine)

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Lukash O., Yakovenko O., Miroshnyk I.
Ecological Questions
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2018
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tom 29
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nr 4
The causes of the mechanical degradation of the loess lands of Chernihiv Polesie have been determined, in particular, the ability of the loess to be washed out and subside easily, deforestation (the end of the 13th – the beginning of the 14th centuries) and the excessive increase of the anthropogenic pressure on the agricultural lands (the end of the 19th – the beginning of the 21st centuries). It has been cleared that the degradation of the loess “islands” soils of Chernihiv Polesie is manifested in the form of erosion and suffusion. The areas at the fifth stage of erosion prevail. The largest percentage of the eroded areas is on the Mykhailo-Kotsiubynsk and Ripky-Chernihiv loess “islands”. The lands with suffusion forms dominate on the Berezna-Mena-Sosnytsia loess “island”. Long-term use of the arable lands contributed to the increase of erosion and suffusion forms of the relief. The potential places of the beginning of the mechanical degradation are post-sowing, neglected lands, which were repeatedly violated mechanically. The plant communities, which are the indicators of different stages of mechanical degradation of the lands, have been identified. The plant communities of Digitario sanguinalis-Eragrostietea minoris Mucina, Lososová et Šilc 2016 and Bidentetea Tx. et al. ex von Rochow 1951 are the indicators of eroded lands at the stages of formation, expansion and deepening of washouts. The phytocenoses of Bidentetea tripartiti are the indicators of the initial stages of suffusion, and the complexes of Magnocaricetalia are the indicators of suffusion increase and deepening. Over the past 120 years, there has been a slight increase in the area occupied by plant communities other than agrocenoses on the loess “islands” due to the anti-erosion planting of Pinus sylvestris and Robinia pseudoacacia. The agronomic, fitomeliorative and prohibitive measures that can slow down the pace of the mechanical degradation of the loess lands of Chernihiv Polesie have been suggested.
3

The vegetation of the cretaceous outcrops of Novhorod-Siverskyi Polesie loess “islands” (Ukraine) and the new locality of Gentiana cruciata L.

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Lukash O., Miroshnyk I., Yakovenko O., Strilets S.
Ecological Questions
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2019
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tom 30
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nr 1
The vegetation of the cretaceous outcrops of Novhorod-Siverskyi Polesie loess “islands” is represented by the grasslands communities of the Artemisietea vulgaris Lohmeyer et al. in Tx. ex von Rochow1951, Festuco-Brometea Br.-Bl. et Tx. ex Soó 1947, TrifolioGeranietea sanguinei T. Müller 1962 classes and shrubby phytocoenoses of the Robinietea Jurko ex Hadač et Sofron 1980 class. The structure and composition of the plant communities are influenced by the degree of anthropogenic influence (both in the past and present) on the ecosystems of cretaceous outcrops. The determining anthropogenic factors contributing to the formation of the ruderal communities were chalk mining and gardening. The influence of erosive processes is manifested in the spatial delimitation of plant communities of various syntaxonomic belongings. The anthropogenic successional communities: semiruderal grasslands and herblands of the immoral and subboreal zones of Europe (ConvolvuloAgropyretum repentis Felföldy (1942) 1943, Poo compressae-Tussilaginetum farfarae R. Tx. 1931) and scrub communities of temperate Europe, represented by the Elytrigio repentisRobinietum Smetana 2002 phytocoenoses typical for Steppe zones, prevail. Semixerothermic communities were found on the steep slopes of the cretaceous outcrops (eastern and southwestern expositions) – early successional stages with a significant amount of the characteristic species of the Festuco-Brometea Br.-Bl. et Tx. ex Soó 1947 class. On the cretaceous outcrops of Novhorod-Siverskyi Polesie loess “islands” the communities of Trifolion medii T. Müller 1962 (meso-subxerophytic fringe phytocoenoses on nutrient-poor but base-rich soils at lower altitudes of temperate Western and Central Europe) is localized on the slopes of the eastern and southeastern parts of the expositions which do not undergo anthropogenic influence and are separated by erosion forms. Such conditions were favorable for preserving the Gentiana cruciata L. relict species in this locality. The population of this species was found in the area of 50 m2 in the Trifolio medii-Agrimonietum Th. Müller 1962 association community and represented by two compact groups of individuals (the area of 0.5 m 2 each) and individual plants. In order to preserve the habitat of this rare species, it is worth creating here a reserve.
4

Dynamics of riverbank ephemeral plant communities in the Stryzhen’ river estuary (Chernihiv, Ukraine)

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Lukash O., Kupchyk O., Karpenko Y., Sliuta A., Kyrienko S.
Ecological Questions
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2016
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tom 24
The authors investigated the dynamics of ephemeral plant communities in the Stryzhen’ river estuary (N51°29’17’’, E31°18’57’’; Chernihiv, Ukraine; Eastern Polesia) after exposure to stress factors. The study of plant communities was carried out with generally accepted geobotanical methods. Samples of soil and water were analysed (in laboratory) using colorimetric methods and stripping voltammetry. The research shows that edaphic and hydrological conditions in the riverside alluvial sediment near the Stryzhen’ river estuary have changed under the influence of meteorological factors (mainly rainfalls). These changes have induced vegetation succession. In the monitored area, we observed a decrease in the concentration of nitrate, an increase in ammonia nitrogen content, the accumulation of sulphates, phosphates and salts of Zn2+, Pb2+, Cu2+, which came from rainfall and melt water. The accumulation of heavy metal salts did not reduce the formation of plant communities. The prognosis of further vegetation changes in the monitored alluvial area has been made. An increase in the area of communities on rich, low salified soils (order Agrostietalia stoloniferae Oberdorfer in Oberdorfer et al. 1967) is anticipated. Locations of Crypsis schoenoides (L.) Lam. and Dichostylis micheliana (L.) Nees. were identified for the first time in the Chernihiv region. Diaspora of these plants arrived in the Stryzhen’ river estuary through hydrochory along the northwest migratory route and the upper river that originates near the border of Ukraine and Belarus.
5
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Antibacterial effects of celandine oil and extracts derived from roots and stalks of greater celandine (Chelidonium majus L.) collected from central Pomeranian region

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Stefanowski N., Tkachenko H., Kurhaluk N., Lukash O., Buyun L.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
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2021
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tom 25
6
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Lipid and protein oxidation in the muscle tissue of rainbow trout after in vitro treatment by extracts derived from greater celandine (Chelidonium majus L.) collected from rural and urban aglomerations of Pomeranian region

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Stefanowski N., Tkachenko H., Kurhaluk N., Lukash O., Aksonov I., Buyun L.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
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2021
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tom 25
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