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METHODOLOGY OF TOXICOLOGICAL EFFECTS ASSESSMENT IN AQUATIC ECOSYSTEMS BY BIODIVERSITY INDICATORS USE Texto completo
2024
Fedoniuk, Tetiana | Skydan, Oleh | Fedoniuk, Roman
The implementation of the EU Water Framework Directive 2000/60/EC within Eastern European is now becoming of utmost significance. This is especially relevant to the territory of Ukrainian Polessie, which is characterized by specific geological and geomorphological conditions, excessive humidification and significant anthropogenic pressure on all components of ecosystems. In this section, we present a methodology for evaluating the content of specific toxicological substances based on a diversitological approach to the macrophyte composition of reservoirs. At the same time, the possibility to apply diversisologic indicators for the bio-indication of the content of heavy metals in coastal soils and bottom deposits was assessed. The most striking changes in the species composition are manifested at the points of the most significant anthropogenic pressure in the presence of toxic compounds in aquatic ecosystems. Significant variations in view indices were noted when the high concentration of heavy metals was reached in the bottom soil. The most significant influence on the species composition is due to high concentrations of the active forms of zinc and cuprum cations in both coastal soils and bottom deposits, although the excessive maximum limits allowed were only in the second group of substances. The close correlation between the content of all investigated groups of heavy metals in bottom deposits and species numbers, the index of dominance, Shannon Diversity Index, and Pielou’s Evenness Index were established. For Margalef Species Richness Index, close dependencies were established for active forms of cations of nickel, cobalt, zinc and cadmium, for other groups the bonds were weak. For Sørensen–Dice Index weaknesses were found with the contents of active forms of cations of nickel and chromium; for other groups of active forms of heavy metals, except cobalt cations, close ties were established as well.
Mostrar más [+] Menos [-]THE INFLUENCE OF DIFFERENT SPECIES OF YEAST ON MYCOTOXINS CONCENTRATIONS IN WHEAT Texto completo
2024
Vaičiulienė, Gintarė | Paškevičius, Algimantas | Knizikevičiūtė, Laura | Gerulis, Gediminas
The aim of this study was to evaluate the effect of Saccharomyes cerevisiae, Geotrichum fermentans, Rhodotorula rubra and Kluyveromyces marxianus yeast cell suspensions and Saccharomyces cerevisiae cell wall’s polysaccharides and fermentation time on mycotoxins concentrations in feed wheat. The 2018 harvest three feed wheat samples were taken from grain processing companies and the research was carried out at the Lithuanian University of Health Sciences, Veterinary Academy, Mycotoxicology Laboratory. The thin – layer chromatography technique (TLC) was used to determine mycotoxins concentrations in the samples. The wheat samples were inoculated with Saccharomyces cerevisiae, Geotrichum fermentans Rhodotorula rubra and Kluyveromyces marxianus yeast 104 cells` ml-1 suspensions and Saccharomyces cerevisiae cell wall`s polysaccharides, duration of the wheat fermentation with the yeast was – 30 min. and 60 min. It was found that all species the yeast suspensions – reducing effect of mycotoxins concentrations correlated with longer duration of fermentation. Saccharomyces cerevisiae yeast suspension after 60 min. reduced AFB1 and DON by 100% (p<0.05) and ZEA up to 80.1 ± 0.50% (p<0.05). Saccharomyces cerevisiae yeast cell wall`s polysaccharides decreased the concentrations of AFB1 (p>0.05), ZEA (p<0.05), DON (p<0.05) during the experiment better than Saccharomyces cerevisiae 104 cells` ml-1 suspension and after 60 min. exposure polysaccharides absorbed all wheat mycotoxins by 100% (p<0.05). The AFB1 were best absorbed by Kluyveromyces marxianus yeast after 60 min. of fermentation by 100% (p<0.05). The DON concentration was below the detection limit after 60 min. of fermentation with Geotrichum fermentans and Rhodotorula rubra yeast.
Mostrar más [+] Menos [-]THE CHANGE OF NATURAL LANDSCAPE IN PALANGA CITY (LITHUANIA) Texto completo
2024
Ivavičiūtė, Giedrė
The paper presents the comparative analysis of the Palanga city landscape change during the period between 2008 and 2019. For this analysis, the land fund statistics of the Republic of Lithuania, which had been grouped into a relatively natural and anthropogenic landscape, were used. Landscape change is graphically shown in the figures. Lithuanian and foreign scientific literature and legal acts were analyzed for the fulfillment of the work. The Palanga city landscape analysis of the current situation was done. During the analysis the Palanga city statistics were compared with the data of Klaipeda County and the Republic of Lithuania. Landscape structure maintenance is the subject important and relevant to this day, as the landscape shapes the country's culture and is the component of natural and cultural heritage contributing to the quality of life and it consolidates Lithuanian identity, uniqueness in Europe and the world. The topic is actual because it is necessary to analyze landscape change in Palanga in order to evaluate and preserve the components of natural landscape in Lithuanian resort. The analysis showed that during the analyzed period the Palanga city natural landscape area 46.34 ha or 1.39 percent. The increase of the natural landscape area was determined by the development of water bodies and wetland areas.
Mostrar más [+] Menos [-]SHORT-TERM IMPACT OF AMMONIUM NITRATE AND WOOD ASH APPLICATION ON GROUND VEGETATION DIVERSITY AND SPECIES COMPOSITION IN DRAINED FORESTS Texto completo
2024
Petaja, Guna | Zvaigzne, Zaiga
Fertilization is a way of improving tree growth and thus profitability of forestry, however this practice may cause negative side effects, such as loss of biodiversity. Ground vegetation represents a major part of plant biodiversity in forest and it is sensitive to environmental changes. The aim of the study was to characterize a short-term impact of ammonium nitrate and wood ash application on floristic composition and species diversity in conifer and deciduous forests on drained mineral and peat soils. The study was conducted in 6 stands representing Myrtillosa, Myrtillosa turf.mel., Vacciniosa mel. and Vacciniosa turf. mel. forest types. The projective cover of each species was estimated visually, separately for moss, herb and shrub layer. Shannon diversity index was calculated and compared between the plots, where fertilizers were added, and control plots. Results show that species composition corresponds to the respective forest types regardless of the application of fertilizers. In Myrtillosa mel. stands, Myrtillosa turf. mel. birch stand and Vacciniosa mel. stand nitrophilous species were more frequently observed and had a slightly larger projective cover in treatment plots, which could be explained by the impact of fertilization. Species diversity in the moss layer might have lowered as a result of fertilization, whereas no consistent patterns were observed for the herb layer. A repeated survey will show, if changes in ground vegetation persist longer.
Mostrar más [+] Menos [-]ASSESSMENT OF THE AGRARIAN LANDSCAPE STRUCTURE IN THE DEVELOPMENT AREA OF THE MAJOR CITIES OF LITHUANIA Texto completo
2024
Valčiukienė, Jolanta | Juknelienė, Daiva | Atkocevičienė, Virginija
Agrarian landscape structure in Lithuania is relatively stable and changes only due to intensive economic activities such as construction of buildings, land reclamation, and afforestation. The changes due to the aforementioned activities are most evident in the development areas of the major cities, which are characterized by the increasing process of chaotic urbanization. The suburban municipalities, bordering the three major cities of Lithuania (Kaunas, Vilnius, Klaipėda), were chosen for the research. To determine areas that were influenced by the urban development among the analyzed cities, the multicriteria analysis method was chosen, which helped to assess the intensity of the suburban area development. The determined areas, which were influenced by the urban development, were divided into three categories, in which the villages of 583 agrarian territories are included. The greatest influence of the urban development on the agrarian landscape is evident in the territories that are closest to the major cities (in the areas of category I) and in which the structure of the components of the agrarian landscape changes mostly by reducing the agricultural land. To ensure a balanced influence of urban development on the agrarian landscape, the average built-up area in the development area of the major cities should not be higher than 20%–30% and the agricultural land area should not be lower than 30%–45%. To preserve the fertile land, the built-up areas should be designed in the agricultural lands with lower productivity.
Mostrar más [+] Menos [-]COLLECTION OF THE PLANT SYMPHYOTRICHUM NEES GENUS IN VYTAUTAS MAGNUS UNIVERSITY BOTANICAL GARDEN Texto completo
2024
Lukšytė, Indrė | Kazlauskaite, Sonata | Balsevičius, Arūnas | Narijauskas, Ričardas
The collection of 82 collection numbers of the plant Symphyotrichum Nees genus has been accumulated in the period of 1923 - 2018 at Vytautas Magnus University Botanical Garden. The collection consists of Symphyotrichum cordifolium, S. dumosum, S. ericoides, S. laeve, S. lanceolatum, S. lateriflorum, S. novae-angliae, S. novi-belgii, S. oblongifolium, S. pilosum, S. × salignum, S. tradescantii, S. turbinellum, S. urophyllum, and their infraspecific taxa and cultones. The major part of the collection consists of S. novi-belgii (32 collection numbers) and S. novae-angliae (19 collection numbers) infraspecific taxa and cultones. 57 collection numbers were acquired by sproutings from other botanical gardens, private collections, nurseries, the origin of 21 collection numbers is unknown, 4 collection numbers were acquired by seed exchange with other botanical gardens. Phenological observations and biometric measurements of plants were performed according to methodological manual "Methodology of phenological observations, biometric measurements and assortment formation of ornamental herbaceous plants" prepared by J. Vaidelys in 2005. When assessing the phytopathological status of plants, powdery mildew (Erysiphe cichoracearum) was determined as the main disease affecting the plants. S. dumosum and S. novi-belgii interspecific taxa and cultones were the most susceptible to the disease. Plants grown in the same location for more than 3 years were more susceptible to the disease. The aim of the study was to review the Symphyotrichum collection and to evaluate the susceptibility of different groups of cultivars to powdery mildew.
Mostrar más [+] Menos [-]APPLICATION OF OZONE IN GRAIN DRYING: AUTONOMOUS SENSOR SYSTEM CONSTRUCTION AND PECULARITIES Texto completo
2024
Kleperis, Janis | Kristiņš, Alberts | Veinbergs, Juris | Gvardina, Irina | Viesturs, Dainis | Ruciņš, Adolfs | Straumīte, Evita | Sloka, Biruta | Brūveris, Juris
The capabilities of modern electronics for autonomous environmental monitoring with wireless data transmission and storage are diverse and give the network operator some freedom in performing any task. The aim of the study is to develop a sensor system for monitoring and controlling the active drying process of grain. An experimental prototype was developed and installed on the farm for two grain drying tanks of the same volume; for one of which the intake air was blended with ozone as a grain drying agent. The paper analyzes the desired and minimum number of monitoring parameters, sensor requirements, their optimal placement in grain drying tanks, data collection, transmission and storage, and data processing and display capabilities. By way of example, the preliminary results of grain drying in tank with ozone-enriched intake air are demonstrated.
Mostrar más [+] Menos [-]HYDROPONIC DEVICES FOR GREEN FODDER PRODUCTION: A REVIEW Texto completo
2024
Grigas, Andrius | Kemzūraitė, Aurelija | Steponavičius, Dainius
In traditional farming, plants require a lot of space (growing area), they consume a large amount of water, absorb a small percentage of nutrients in soil and are completely dependent on meteorological conditions. Therefore, growing crops in this way entails high costs and a high risk of invested funds. One of the measures to reduce these factors is the use of hydroponics.In the study six types of hydroponic systems (HS) plant constructions based on plant nutrient supply technology were reviewed: ebb and flow HS; nutrient film technique (NFT) HS; aeroponics; deep water culture HS; “wick” HS and drip-irrigation HS. In addition, a review of the structural design of the hydroponic systems identified their advantages and disadvantages in green fodder production.The most promising technology for the cultivation of green fodder is the NFT HS. This cultivation technology is appreciated in feed production for its highly utilized growing room volume and closed-loop irrigation solution to plants, which allows it to be easily automated based on solution parameters. Seven farms already have this technology in place in Lithuania. In order to optimize hydroponic fodder cultivation technology, it is expedient to improve NFT equipment and process control systems.
Mostrar más [+] Menos [-]INTERNATIONAL TRADE IMPACT ON GLOBAL WARMTH IN TEXTILE AND CLOTHING INDUSTRY Texto completo
2024
Valodka, Ignas | Snieska, Vytautas
In the last decade we can observe changes in the fashion industry due to the rising demand of textile and clothing products in Europe. We investigate its sustainability implications by re-calculating carbon emissions and addressing each countries responsibility rather than current traditional way of calculating CO2 emissions. A multi-regional input-output model is built to calculate carbon emissions embodied in trade in EU textile and clothing industry from 2000 to 2016. World Input-Output Database and other databases are used for the recounting of CO2 emissions embodied in EU textile and clothing international trade. The results show that 1) Germany and United Kingdom were biggest EU CO2 emission importers in 2000 and 2016 what makes them biggest contributors to global CO2 pollution in textile and clothing industry in Europe. 2) India and China has big direct emission coefficients and perform under low energy efficiency levels compared to Turkey 3) Higher direct carbon emission coefficient result in a higher CO2 imports. 4) Increasing textile and clothing products imports result in higher CO2 emission imports. Therefore in order to reduce carbon emissions producing countries should invest in “low-carbon” industries and might regulate textile and clothing products imports.
Mostrar más [+] Menos [-]WELLBEING IN RURAL AREAS OF LITHUANIA: FINDINGS FROM THE EUROPEAN SOCIAL SURVEY Texto completo
2024
Vaznonienė, Gintarė | Jarašiūnaitė-Fedosejeva, Gabija
This article reports on the evaluation of the wellbeing of rural people in Lithuania. Literature analysis and empirical findings suggest that research on wellbeing has received scant attention, especially at the local level in Lithuania. Although, to date, some research has been carried out on other specific factors of wellbeing such as belonging to a particular social group, wellbeing in the city, or wellbeing related to job environment, etc., far too little attention has been paid to socio-demographic variables. These limitations call for a more comprehensive discussion and analysis of the situation of a wellbeing and its tendencies in rural areas. The aim of this research is to evaluate the relationship between wellbeing and socio-demographic characteristics of residents of rural areas in Lithuania. Statistical calculations evaluating the wellbeing of rural people were made by using data from the last Round 8 of the European Social Survey. The findings show that the wellbeing of rural people is related to socio- demographic characteristics. People living in big cities of Lithuania rate their happiness higher than those living in towns or small cities and rural areas; residents of rural areas of Lithuania who live with children are happier and more satisfied with life than those living without children at household grid; weak and negative, but statistically significant, correlations between happiness and age, and satisfaction with life and age were observed; younger residents in rural areas of Lithuania are happier and more satisfied with life in comparison to older ones; the longer people study, the happier and more satisfied with life they are; divorced are less happy and satisfied with life than those who have never been married as well as those who are legally married or are widows/widowers; people who study are happier and more satisfied with life than those who work, are unemployed or retired. Key words: Wellbeing, rural areas, happiness, satisfaction with life, European social survey.
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