Ashagrie Gibtan, W. Abera, Mekuria Delelegn, Molla Maru, Adamu Emiru
Abstract Analysis of urban Land Use/Land Cover (LULC) dynamics in light of urban agriculture (UA) helps to understand its implication for UA practice and in turn making the necessary interventions. Therefore, the main objective of this study was to examine the LULC dynamics in selected urban centers of Ethiopia (Addis Ababa, Bahir Dar, Adama, and Hawassa cities) for the last seventeen years (2006–2022). SPOT 5 satellite imagery for the year 2006 and 2016 and Sentinel image for the year 2022 were analyzed. In addition, data from key informant interviews, focus group discussions, and field observations were used to triangulate LULC analyses information and to identify the main causes of LULC dynamics in the studied urban centers. The findings reveled that there were rapid expansion of urban built-up areas at the expense of other urban LULC types mainly of peri urban horticultural lands for the last 17 years (2006‒2022) in Addis Ababa, Hawassa, Bahir Dar, and Adama cities of Ethiopia. This has adverse impact on the sustainability of UA. Rapid urban population growth mainly because of high rural urban migration, expansion of squatter settlement, and increment of investment were the main driving forces of LULC dynamics. Based on the findings of this study (changes in LULC and driving factors) the studied cities administrations or authorities need to develop sustainable development plans by considering UA.
{"title":"Land Use/Cover Dynamics and its Implication on the Sustainability of Urban Agriculture in Selected Urban Centers of Ethiopia","authors":"Ashagrie Gibtan, W. Abera, Mekuria Delelegn, Molla Maru, Adamu Emiru","doi":"10.2478/eko-2024-0009","DOIUrl":"https://doi.org/10.2478/eko-2024-0009","url":null,"abstract":"Abstract Analysis of urban Land Use/Land Cover (LULC) dynamics in light of urban agriculture (UA) helps to understand its implication for UA practice and in turn making the necessary interventions. Therefore, the main objective of this study was to examine the LULC dynamics in selected urban centers of Ethiopia (Addis Ababa, Bahir Dar, Adama, and Hawassa cities) for the last seventeen years (2006–2022). SPOT 5 satellite imagery for the year 2006 and 2016 and Sentinel image for the year 2022 were analyzed. In addition, data from key informant interviews, focus group discussions, and field observations were used to triangulate LULC analyses information and to identify the main causes of LULC dynamics in the studied urban centers. The findings reveled that there were rapid expansion of urban built-up areas at the expense of other urban LULC types mainly of peri urban horticultural lands for the last 17 years (2006‒2022) in Addis Ababa, Hawassa, Bahir Dar, and Adama cities of Ethiopia. This has adverse impact on the sustainability of UA. Rapid urban population growth mainly because of high rural urban migration, expansion of squatter settlement, and increment of investment were the main driving forces of LULC dynamics. Based on the findings of this study (changes in LULC and driving factors) the studied cities administrations or authorities need to develop sustainable development plans by considering UA.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"77 1","pages":"91 - 98"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141395119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This study examines the spatial distribution of soil types and their susceptibility to erosion and accumulation processes in a study area in Slovakia. Field research involving 71 probes identified various soil types, with Regosols and Cutanic Luvisols being predominant. The study found that erosion-accumulation processes were detected in 69.97% of the probes, with changes observed in soil horizons. Soil analysis revealed different relations between soil depth, humus thickness, and terrain characteristics such as slope, slope length, and slope length and steepness factor (LS factor). Specifically, we confirmed a moderately strong positive correlation between soil depth and humus thickness (r = 0.597, n = 71, p < 0.001). Shallow soils (0–30 cm) exhibited a very strong positive correlation between soil depth and humus horizon thickness (r = 0.978, n = 33, p < 0.001). Conversely, no relationship was found in moderately deep soils (30–60 cm) (r = 0.018, n = 14, p < 0.948). For deep soils, we identified a moderately strong positive correlation (r = 0.345, n = 24, p = 0.098). While slope and slope length showed relationships with soil depth and humus thickness, the LS factor did not exhibit a clear correlation. These findings underscore the importance of understanding soil dynamics in informing land management practices, especially in areas susceptible to erosion. Recommendations include continued monitoring of eroded soils and implementing erosion control measures to maintain soil health and sustainability in agricultural production amidst climate change challenges.
{"title":"Influence of Morphometric Relief Parameters on Soil Depth Changes and Humus Horizon Thickness in Relation to Erosion-Accumulation Processes: A Study in the Ipeľská Pahorkatina Hills, Slovakia","authors":"Marek Moravčík, V. Petlušová, P. Petluš","doi":"10.2478/eko-2024-0001","DOIUrl":"https://doi.org/10.2478/eko-2024-0001","url":null,"abstract":"Abstract This study examines the spatial distribution of soil types and their susceptibility to erosion and accumulation processes in a study area in Slovakia. Field research involving 71 probes identified various soil types, with Regosols and Cutanic Luvisols being predominant. The study found that erosion-accumulation processes were detected in 69.97% of the probes, with changes observed in soil horizons. Soil analysis revealed different relations between soil depth, humus thickness, and terrain characteristics such as slope, slope length, and slope length and steepness factor (LS factor). Specifically, we confirmed a moderately strong positive correlation between soil depth and humus thickness (r = 0.597, n = 71, p < 0.001). Shallow soils (0–30 cm) exhibited a very strong positive correlation between soil depth and humus horizon thickness (r = 0.978, n = 33, p < 0.001). Conversely, no relationship was found in moderately deep soils (30–60 cm) (r = 0.018, n = 14, p < 0.948). For deep soils, we identified a moderately strong positive correlation (r = 0.345, n = 24, p = 0.098). While slope and slope length showed relationships with soil depth and humus thickness, the LS factor did not exhibit a clear correlation. These findings underscore the importance of understanding soil dynamics in informing land management practices, especially in areas susceptible to erosion. Recommendations include continued monitoring of eroded soils and implementing erosion control measures to maintain soil health and sustainability in agricultural production amidst climate change challenges.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"187 1","pages":"1 - 15"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141405566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sabína Farkasová, Henrik Kalivoda, Vladimír Langraf, M. Holecová
Abstract The aim of this study is to elaborate on the prior information about Hipparchia hermione ecology, examine its behaviour and find the habitat preferences of the species in specific study areas. The obtained results contribute to better management and conservation of the species and its habitats in Slovakia. Six types of behaviour were observed, with the exception of courtship dances, mating and perching. The most common types of behaviour observed were flight and food intake. The RDA analysis of behaviour and environmental variables resulted in a positive effect of free substrate and tall-herb vegetation on H. hermione abundance. The free substrate had a significant positive effect on all types of H. hermione behaviour. The results of the RDA analysis indicate butterflies’ shrub preference. The notion of shrubs’ presence having a positive effect on the representation of H. hermione is supported by another data set, according to which shrub vegetation provided ideal conditions for all types of observed behaviour. The abundance and diversity of nectaring plants did not have a statistically significant effect on species representation. Due to the environmental variables, the tree crowns’ significance plays a vital role. The average values are of 50%. The number of H. hermione individuals in the study areas increased with the growing number of tree trunks over 20 cm and heights over 3 m and the growing number of caterpillar host plants (Festuca ovina). The data show that Hipparchia hermione butterflies depend more on the spatial and structural arrangement of the forest than on abundance or diversity of the flora in the study areas.
摘要 本研究的目的是详细阐述有关 Hipparchia hermione 生态学的现有信息，研究其行为并发现该物种在特定研究区域的栖息地偏好。研究结果有助于更好地管理和保护该物种及其在斯洛伐克的栖息地。除了求偶舞蹈、交配和栖息外，共观察到六种行为。最常见的行为类型是飞行和摄食。行为和环境变量的 RDA 分析结果表明，自由基质和高草丛植被对 H. hermione 的数量有积极影响。自由基质对所有类型的 H. hermione 行为都有显著的积极影响。RDA 分析结果表明蝴蝶偏好灌木。灌木的存在对 H. hermione 的表现有积极影响的观点得到了另一组数据的支持，根据这组数据，灌木植被为所有类型的观察行为提供了理想的条件。蜜源植物的丰度和多样性对物种代表性没有显著的统计学影响。由于环境变量，树冠的重要性起着至关重要的作用。平均值为 50%。随着树干超过 20 厘米、树高超过 3 米的树木数量的增加，以及毛虫寄主植物（Festuca ovina）数量的增加，研究区域的 H. hermione 个体数量也在增加。这些数据表明，在研究区域内，大翅蟹蝶对森林空间和结构布局的依赖程度高于植物群的丰度或多样性。
{"title":"Habitat Structure Impact on the Occurrence Preferences and Behaviour of the Endangered Species Hipparchia hermione (Lepidoptera, Nymphalidae) in Slovakia","authors":"Sabína Farkasová, Henrik Kalivoda, Vladimír Langraf, M. Holecová","doi":"10.2478/eko-2024-0007","DOIUrl":"https://doi.org/10.2478/eko-2024-0007","url":null,"abstract":"Abstract The aim of this study is to elaborate on the prior information about Hipparchia hermione ecology, examine its behaviour and find the habitat preferences of the species in specific study areas. The obtained results contribute to better management and conservation of the species and its habitats in Slovakia. Six types of behaviour were observed, with the exception of courtship dances, mating and perching. The most common types of behaviour observed were flight and food intake. The RDA analysis of behaviour and environmental variables resulted in a positive effect of free substrate and tall-herb vegetation on H. hermione abundance. The free substrate had a significant positive effect on all types of H. hermione behaviour. The results of the RDA analysis indicate butterflies’ shrub preference. The notion of shrubs’ presence having a positive effect on the representation of H. hermione is supported by another data set, according to which shrub vegetation provided ideal conditions for all types of observed behaviour. The abundance and diversity of nectaring plants did not have a statistically significant effect on species representation. Due to the environmental variables, the tree crowns’ significance plays a vital role. The average values are of 50%. The number of H. hermione individuals in the study areas increased with the growing number of tree trunks over 20 cm and heights over 3 m and the growing number of caterpillar host plants (Festuca ovina). The data show that Hipparchia hermione butterflies depend more on the spatial and structural arrangement of the forest than on abundance or diversity of the flora in the study areas.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"2013 29","pages":"66 - 75"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141400622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fairouz Dghim, M. Boukhris, M. Neffati, Mohamed Chaieb
Abstract Periploca angustifolia (Labill.) is a multipurpose xerophytic shrub in the Apocynaceae, which is widely disturbed in arid zones. This shrub is often used in programs for the rehabilitation of degraded areas, so it is essential to investigate the impact of environmental factors (drought, burial depth) on seed germination patterns. During 20 days, germination responses of seeds were determined over a wide range of constant temperatures (25 °C), polyethylene glycol PEG-6000 solutions of different osmotic potentials (0 to -1.6 MPa), and burial depths (1–8 cm). The highest germination percentages (99%) were obtained under control conditions without PEG, and increasing osmotic pressure progressively inhibited seed germination, which was about 2% at -1.6 MPa. When seeds were buried deep, there was a significant decrease in seedling emergence percentage and rate. Seedlings of P. angustifolia emerged well at depths of 1–2 cm with the highest emergence percentage of 74 and 69%, respectively. They could not emerge when the sand burial depth was higher than 4 cm.
{"title":"Effect of Water Deficit and Burial Depth on The Germination of Periploca angustifolia","authors":"Fairouz Dghim, M. Boukhris, M. Neffati, Mohamed Chaieb","doi":"10.2478/eko-2024-0003","DOIUrl":"https://doi.org/10.2478/eko-2024-0003","url":null,"abstract":"Abstract Periploca angustifolia (Labill.) is a multipurpose xerophytic shrub in the Apocynaceae, which is widely disturbed in arid zones. This shrub is often used in programs for the rehabilitation of degraded areas, so it is essential to investigate the impact of environmental factors (drought, burial depth) on seed germination patterns. During 20 days, germination responses of seeds were determined over a wide range of constant temperatures (25 °C), polyethylene glycol PEG-6000 solutions of different osmotic potentials (0 to -1.6 MPa), and burial depths (1–8 cm). The highest germination percentages (99%) were obtained under control conditions without PEG, and increasing osmotic pressure progressively inhibited seed germination, which was about 2% at -1.6 MPa. When seeds were buried deep, there was a significant decrease in seedling emergence percentage and rate. Seedlings of P. angustifolia emerged well at depths of 1–2 cm with the highest emergence percentage of 74 and 69%, respectively. They could not emerge when the sand burial depth was higher than 4 cm.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"4 8","pages":"26 - 33"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141405004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Olga Kunakh, O. Lisovets, N. Podpriatova, O. Zhukov
Abstract Reliable indicators of success are needed to monitor the process of reclaiming disturbed land in order to understand the achievement of reclamation objectives. The formation of coherent dynamics of vegetation and soil development is ultimately a crucial condition for the success of reclaiming territory disturbed by surface mining and the possibility of using reclaimed land in agricultural production. The study revealed a relationship between the phytoindicator of vegetation hemeroby and the physical properties of technosols to prove its application as a measure of the restoration of the disturbed ecosystem in the reclamation process. The plant communities were classified into beta-, alpha-euhemerobic, polyhemerobic and metahemerobic levels of anthropogenic transformation. The technosols varied in the proportion of hemeroby levels of plant communities. The hemeroby level was consistent with the physical properties of technosols. A decrease in hemeroby level resulted in increased soil electrical conductivity, decreased soil penetration resistance and altered soil aggregate structure. The hemeroby of plant communities is a dependable phytoindicator of ecosystem restoration during reclamation.
{"title":"Plant Community Hemeroby is a Reliable Indicator of the Dynamics of Reclamation of Lands Disturbed by Mining","authors":"Olga Kunakh, O. Lisovets, N. Podpriatova, O. Zhukov","doi":"10.2478/eko-2024-0005","DOIUrl":"https://doi.org/10.2478/eko-2024-0005","url":null,"abstract":"Abstract Reliable indicators of success are needed to monitor the process of reclaiming disturbed land in order to understand the achievement of reclamation objectives. The formation of coherent dynamics of vegetation and soil development is ultimately a crucial condition for the success of reclaiming territory disturbed by surface mining and the possibility of using reclaimed land in agricultural production. The study revealed a relationship between the phytoindicator of vegetation hemeroby and the physical properties of technosols to prove its application as a measure of the restoration of the disturbed ecosystem in the reclamation process. The plant communities were classified into beta-, alpha-euhemerobic, polyhemerobic and metahemerobic levels of anthropogenic transformation. The technosols varied in the proportion of hemeroby levels of plant communities. The hemeroby level was consistent with the physical properties of technosols. A decrease in hemeroby level resulted in increased soil electrical conductivity, decreased soil penetration resistance and altered soil aggregate structure. The hemeroby of plant communities is a dependable phytoindicator of ecosystem restoration during reclamation.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"94 10","pages":"43 - 53"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141390683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Wildlife crime has emerged as one of the most crucial threats to biodiversity conservation and is particularly severe in south and southeast Asia. Addressing the ever-increasing challenges of wildlife crime in Nepal requires strategies informed by rigorous analysis of spatiotemporal patterns of wildlife crime. However, little do we know about the nature and trends of wildlife crimes in Nepal. Retrieving the information on the registered wild-life crime cases of Annapurna Conservation Area (ACA) from the Annapurna Conservation Area Liaison Office (ACALO) and Kaski District Court, this study assessed the temporal trend and spatial pattern of wildlife crime in the ACA from 1994 to 2019. Additionally, this study assessed the sociodemographic characteristics of the people convicted in wildlife crime cases. A total of 48 cases of crimes were registered over the last 25 years among which the majority of the cases were of poaching and wildlife trophies transportation (89.6%) mainly from Kaski district (60%). For those cases, a total of 132 people were convicted (65% from local villages and 35% from outside the ACA). About 68% of the convicted perpetrators were from Janajati ethnicity with poor economic conditions. These inferences emphasize the necessity of understanding the severity and pattern of the crime to prevent it by synthesizing and implementing conservation programs such as educating targeted groups and providing alternative sources of income.
{"title":"Temporal Wildlife Crime Trend and Sociodemographic Attributes of Offenders in Annapurna Conservation Area, Nepal","authors":"Dayaram Pandey, Pratistha Shrestha, Dipesh Kumar Sharma, Thakur Silwal, Anita Thapaliya","doi":"10.2478/eko-2024-0011","DOIUrl":"https://doi.org/10.2478/eko-2024-0011","url":null,"abstract":"Abstract Wildlife crime has emerged as one of the most crucial threats to biodiversity conservation and is particularly severe in south and southeast Asia. Addressing the ever-increasing challenges of wildlife crime in Nepal requires strategies informed by rigorous analysis of spatiotemporal patterns of wildlife crime. However, little do we know about the nature and trends of wildlife crimes in Nepal. Retrieving the information on the registered wild-life crime cases of Annapurna Conservation Area (ACA) from the Annapurna Conservation Area Liaison Office (ACALO) and Kaski District Court, this study assessed the temporal trend and spatial pattern of wildlife crime in the ACA from 1994 to 2019. Additionally, this study assessed the sociodemographic characteristics of the people convicted in wildlife crime cases. A total of 48 cases of crimes were registered over the last 25 years among which the majority of the cases were of poaching and wildlife trophies transportation (89.6%) mainly from Kaski district (60%). For those cases, a total of 132 people were convicted (65% from local villages and 35% from outside the ACA). About 68% of the convicted perpetrators were from Janajati ethnicity with poor economic conditions. These inferences emphasize the necessity of understanding the severity and pattern of the crime to prevent it by synthesizing and implementing conservation programs such as educating targeted groups and providing alternative sources of income.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"2011 7","pages":"112 - 119"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141400715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sergey Shevchenko, K. Derevenets-Shevchenko, Mikhail Shevchenko, Oleksandr Shevchenko
Abstract An important reserve for increasing the productivity of agricultural production is a scientifically based crop structure and the use of rational crop rotations, which implement the optimal ratio of agroecological standards. The aim of the research was to determine the influence of elements of agrotechnical measures, in particular, the saturation of crop rotations with sunflower, soil tillage system on the number and species composition of various agrobiological groups of weeds in sunflower crops, including the weed parasite sunflower broomrape (Orobanche cumana Wallr.). Weed control measures and the spread of the parasitic weed sunflower broomrape in sunflower crops have been carried out according to the methods generally accepted in agriculture and weed science. The scheme of the experiment included crop rotations with saturation in the structure of sunflower sowing of 12.5, 20, 25, 33.3, 50, 100% and three systems of basic tillage: moldboard plowing, disc tillage, and no-tillage. As a result of the research, it has been found that the systems of disc tillage and no-tillage cause an increase in the number of weeds in sunflower crops compared to the moldboard plowing by 1.3–1.5 times. On average, over the years of research, the abundance of weeds in the plots when using disk tools was 10.4–15.1 pcs./m2, moldboard plowing was 7.1–12.4 pcs./m2, and before harvesting was 2.6–5.2 and 4.1–12.4 pcs./m2. The highest degree of sunflower broomrape damage has been observed in 2-fields crop rotation (winter wheat—sunflower) and permanent sunflower cultivation, as 16.0–32.4% of affected sunflower plants have been observed here. The intensity of sunflower broomrape damage to sunflower plants was higher in the moldboard plowing system and amounted to 1.2–8.3 pcs./per plant, which exceeded disc tillage and no-tillage by 1.2–1.6 times. The maximum seed yield of 2.92–2.95 t/ha has been obtained in 8- and 5-fields rotations with the use of moldboard plowing. The lowest yields of sunflower seeds were in short-rotation crop rotations with a sunflower saturation of 50% in the structure of sown areas and permanent cultivation and amounted to: moldboard plowing—1.75–2.21 t/ha, disk tillage—1.57–2.01 t/ha, and no-tillage—1.49–1.95 t/ha. Given the urgency of supplying the global market with sunflower oil, in the future it is necessary to increase the concentration of sunflower in the structure of sown areas to 30-40% through the system of basic tillage, selection of resistant hybrids, and use of herbicides.
{"title":"Sunflower Broomrape (Orobanche cumana Wallr.) and Weeds in Sunflower Crops with Minimized Tillage in a Steppe Ecotype Crop Rotation","authors":"Sergey Shevchenko, K. Derevenets-Shevchenko, Mikhail Shevchenko, Oleksandr Shevchenko","doi":"10.2478/eko-2024-0004","DOIUrl":"https://doi.org/10.2478/eko-2024-0004","url":null,"abstract":"Abstract An important reserve for increasing the productivity of agricultural production is a scientifically based crop structure and the use of rational crop rotations, which implement the optimal ratio of agroecological standards. The aim of the research was to determine the influence of elements of agrotechnical measures, in particular, the saturation of crop rotations with sunflower, soil tillage system on the number and species composition of various agrobiological groups of weeds in sunflower crops, including the weed parasite sunflower broomrape (Orobanche cumana Wallr.). Weed control measures and the spread of the parasitic weed sunflower broomrape in sunflower crops have been carried out according to the methods generally accepted in agriculture and weed science. The scheme of the experiment included crop rotations with saturation in the structure of sunflower sowing of 12.5, 20, 25, 33.3, 50, 100% and three systems of basic tillage: moldboard plowing, disc tillage, and no-tillage. As a result of the research, it has been found that the systems of disc tillage and no-tillage cause an increase in the number of weeds in sunflower crops compared to the moldboard plowing by 1.3–1.5 times. On average, over the years of research, the abundance of weeds in the plots when using disk tools was 10.4–15.1 pcs./m2, moldboard plowing was 7.1–12.4 pcs./m2, and before harvesting was 2.6–5.2 and 4.1–12.4 pcs./m2. The highest degree of sunflower broomrape damage has been observed in 2-fields crop rotation (winter wheat—sunflower) and permanent sunflower cultivation, as 16.0–32.4% of affected sunflower plants have been observed here. The intensity of sunflower broomrape damage to sunflower plants was higher in the moldboard plowing system and amounted to 1.2–8.3 pcs./per plant, which exceeded disc tillage and no-tillage by 1.2–1.6 times. The maximum seed yield of 2.92–2.95 t/ha has been obtained in 8- and 5-fields rotations with the use of moldboard plowing. The lowest yields of sunflower seeds were in short-rotation crop rotations with a sunflower saturation of 50% in the structure of sown areas and permanent cultivation and amounted to: moldboard plowing—1.75–2.21 t/ha, disk tillage—1.57–2.01 t/ha, and no-tillage—1.49–1.95 t/ha. Given the urgency of supplying the global market with sunflower oil, in the future it is necessary to increase the concentration of sunflower in the structure of sown areas to 30-40% through the system of basic tillage, selection of resistant hybrids, and use of herbicides.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"15 6","pages":"34 - 42"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141398919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract To ensure safe and quality drinking water for residents of rural settlements who use their own wells, boreholes, and natural sources for domestic water supply, a comprehensive approach to evaluating the quality of underground drinking water using geographic information system (GIS) technologies is necessary. The purpose of the study was to assess the quality of drinking water sources of noncentralized water supply in rural settlements of the united territorial communities (UTCs) of Zhytomyr district and to create geoinformation models based on the research results. The following research methods were used during the research: analytical, field, laboratory, statistical, calculation, and cartographic. The research was conducted in 129 settlements of 12 UTCs of Zhytomyr district, where drinking water samples were collected from noncentralized water supply sources for further analysis in the Measurement Laboratory of Polissia National University, and the creation of geoinformation models using the ArcGIS Pro software package. It has been proven that the average pH level in none of the studied settlements exceeded the norm. The average nitrate concentration in the drinking water from noncentralized water sources exceeded the norm by 1.4–3.5 times, specifically in the water of the Pulyny, Cherniakhiv, Vilshanka, Volytsia, and Oliivka communities, exceeding the maximum acceptable concentration (MAC) limit by more than two times. Only in rural settlements in the Liubar community was the average iron content found to be above the norm by more than 1.9 times. Overall, it was established that the calculated value of the overall water quality class in the Zhytomyr district was 2.03, which is determined as “good,” clean water of acceptable quality. The best water quality was found in the Vilshanka, Cherniakhiv, and Stanyshivka communities, with a quality class range of 1.85–1.93, while the worst water quality was recorded in the Oliivka, Teterivka, and Liubar communities, with a quality class range of 2.13–2.31. It was determined that the highest contribution to the overall water quality was made by nitrate and iron content. The obtained research results and models based on them can be used by local governments of the studied communities to inform the population about the quality of drinking water and to develop a plan for improving the state of drinking water supply with the aim of increasing the level of environmental safety of drinking water.
{"title":"Geographic Information Systems for Water Quality Modeling in the Zhytomyr District Communities","authors":"R. Valerko, L. Herasymchuk, Oleksandr Kratiuk","doi":"10.2478/eko-2024-0010","DOIUrl":"https://doi.org/10.2478/eko-2024-0010","url":null,"abstract":"Abstract To ensure safe and quality drinking water for residents of rural settlements who use their own wells, boreholes, and natural sources for domestic water supply, a comprehensive approach to evaluating the quality of underground drinking water using geographic information system (GIS) technologies is necessary. The purpose of the study was to assess the quality of drinking water sources of noncentralized water supply in rural settlements of the united territorial communities (UTCs) of Zhytomyr district and to create geoinformation models based on the research results. The following research methods were used during the research: analytical, field, laboratory, statistical, calculation, and cartographic. The research was conducted in 129 settlements of 12 UTCs of Zhytomyr district, where drinking water samples were collected from noncentralized water supply sources for further analysis in the Measurement Laboratory of Polissia National University, and the creation of geoinformation models using the ArcGIS Pro software package. It has been proven that the average pH level in none of the studied settlements exceeded the norm. The average nitrate concentration in the drinking water from noncentralized water sources exceeded the norm by 1.4–3.5 times, specifically in the water of the Pulyny, Cherniakhiv, Vilshanka, Volytsia, and Oliivka communities, exceeding the maximum acceptable concentration (MAC) limit by more than two times. Only in rural settlements in the Liubar community was the average iron content found to be above the norm by more than 1.9 times. Overall, it was established that the calculated value of the overall water quality class in the Zhytomyr district was 2.03, which is determined as “good,” clean water of acceptable quality. The best water quality was found in the Vilshanka, Cherniakhiv, and Stanyshivka communities, with a quality class range of 1.85–1.93, while the worst water quality was recorded in the Oliivka, Teterivka, and Liubar communities, with a quality class range of 2.13–2.31. It was determined that the highest contribution to the overall water quality was made by nitrate and iron content. The obtained research results and models based on them can be used by local governments of the studied communities to inform the population about the quality of drinking water and to develop a plan for improving the state of drinking water supply with the aim of increasing the level of environmental safety of drinking water.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"7 6","pages":"99 - 111"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141396839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract With an average annual rainfall below 150 mm, the steppe with Hammada scoparia emerges, constituting the transition between the arid steppes and the Saharan vegetation. The distribution of the vegetation is very irregular, which depends on the nature and structure of the soils. A soil study, based on observations and the sampling of 42 profiles, was carried out within a range of species located in the southern part of Naâma. The principal component analysis enables the identification of relationships between the different soil profiles and the species studied. The results obtained show that the woody steppe with H. scoparia occupies habitats characterized by a sandy-loamy to sandy and stony texture on the surface of carbonate crusts, often in the form of slabs with a variable carbonate content of 1.22 to 12.7% in certain types of soil; this element tends to be carried to a depth of 40 to 60 cm. In other types of soil, on the contrary, it remains distributed throughout the entire profile. Colonized soils are generally shallow and poor in organic matter, varying from 2 to 3.65%, with an alkaline pH ranging between 6.7 and 8.8. The measured electrical conductivity varies between 0.1 and 0.7 mS/cm. This variation largely depends on the texture of the soil, the bioclimate and the steppe vegetation. The results obtained enable the valorization of this species, which has a socio-economic and ecological role, as it practically adapts to the different types of soil of the steppe space.
{"title":"Physico-Chemical Properties of Steppe Soils with Hammada scoparia (Pomel) in The Naâma Region (Algeria)","authors":"H. Boucherit, A. Benaradj","doi":"10.2478/eko-2024-0002","DOIUrl":"https://doi.org/10.2478/eko-2024-0002","url":null,"abstract":"Abstract With an average annual rainfall below 150 mm, the steppe with Hammada scoparia emerges, constituting the transition between the arid steppes and the Saharan vegetation. The distribution of the vegetation is very irregular, which depends on the nature and structure of the soils. A soil study, based on observations and the sampling of 42 profiles, was carried out within a range of species located in the southern part of Naâma. The principal component analysis enables the identification of relationships between the different soil profiles and the species studied. The results obtained show that the woody steppe with H. scoparia occupies habitats characterized by a sandy-loamy to sandy and stony texture on the surface of carbonate crusts, often in the form of slabs with a variable carbonate content of 1.22 to 12.7% in certain types of soil; this element tends to be carried to a depth of 40 to 60 cm. In other types of soil, on the contrary, it remains distributed throughout the entire profile. Colonized soils are generally shallow and poor in organic matter, varying from 2 to 3.65%, with an alkaline pH ranging between 6.7 and 8.8. The measured electrical conductivity varies between 0.1 and 0.7 mS/cm. This variation largely depends on the texture of the soil, the bioclimate and the steppe vegetation. The results obtained enable the valorization of this species, which has a socio-economic and ecological role, as it practically adapts to the different types of soil of the steppe space.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"95 5","pages":"16 - 25"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141395547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The sustainability of forests and forestland resources is essential in ensuring the long-term well-being of ecosystems, biodiversity, and human society. This study analyzed available data from triangulated sources that produced information about extent and locations of the current assets, threats, and opportunities that were analyzed using various statistical methods, image and spatial analysis, and situational analysis in order to develop and sustain applicable management, conservation, and protection strategies for forest and forestland (FFL) resources of Baler, Aurora. Results revealed that there were significant changes of FFL assets from 2003 to 2018, and the recent data showed that closed forest was still the dominant cover of the area along with other assets like biodiversity, tourism, water resources, and others. The decreasing trend of the forest cover was the result of expansion of cultivated lands that follows the occurrence of several threats both from natural and anthropogenic sources. The most severe among the anthropogenic threats is timber poaching followed by charcoal making, pole timber collection, and firewood gathering. These threats were driven by the number of dependents, home-to-threat distance, conveyances used, and income earned per activity. Social geomatics of the identified threats shows that the human activities had extended almost to the farthest portions of each sub-watersheds that affects opportunities for development and sustainable utilization of resources. Assets, threats, and opportunities were considered as inputs used in situational analysis of sub-watersheds of which prior-itization of use was decided and FFL management strategies were developed and proposed to be sustained in order to produce optimum ecological, socio-cultural, and economical benefits in the future.
{"title":"Assets, Threats, and Opportunities in Developing and Sustaining the Management of Forest and Forestland Resources of Baler, Aurora, Philippines","authors":"Rb Juarez Gallego","doi":"10.2478/eko-2024-0008","DOIUrl":"https://doi.org/10.2478/eko-2024-0008","url":null,"abstract":"Abstract The sustainability of forests and forestland resources is essential in ensuring the long-term well-being of ecosystems, biodiversity, and human society. This study analyzed available data from triangulated sources that produced information about extent and locations of the current assets, threats, and opportunities that were analyzed using various statistical methods, image and spatial analysis, and situational analysis in order to develop and sustain applicable management, conservation, and protection strategies for forest and forestland (FFL) resources of Baler, Aurora. Results revealed that there were significant changes of FFL assets from 2003 to 2018, and the recent data showed that closed forest was still the dominant cover of the area along with other assets like biodiversity, tourism, water resources, and others. The decreasing trend of the forest cover was the result of expansion of cultivated lands that follows the occurrence of several threats both from natural and anthropogenic sources. The most severe among the anthropogenic threats is timber poaching followed by charcoal making, pole timber collection, and firewood gathering. These threats were driven by the number of dependents, home-to-threat distance, conveyances used, and income earned per activity. Social geomatics of the identified threats shows that the human activities had extended almost to the farthest portions of each sub-watersheds that affects opportunities for development and sustainable utilization of resources. Assets, threats, and opportunities were considered as inputs used in situational analysis of sub-watersheds of which prior-itization of use was decided and FFL management strategies were developed and proposed to be sustained in order to produce optimum ecological, socio-cultural, and economical benefits in the future.","PeriodicalId":11593,"journal":{"name":"Ekológia (Bratislava)","volume":"66 6","pages":"76 - 90"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141390079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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