scholarly journals THE SEX SYSTEM OF THE POPULATION OF SAGITTARIA SAITTIFOLIA AS AN INDICATOR OF THE ECOLOGICAL STATUS OF A RIVER

2017 ◽  
Vol 1 ◽  
pp. 150
Author(s):  
Tatyana Konchina ◽  
Viola Sidorskaya ◽  
Svetlana Oparina ◽  
Alexander Rostunov ◽  
Elena Baronova ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Environmental Conditions ◽  
Urban Areas ◽  
Ecological Status ◽  
Anthropogenic Pollution ◽  
Water Quality Assessment ◽  
Small Rivers ◽  
Important Place ◽  
Reproductive Differentiation ◽  
Sagittaria Sagittifolia

The ecological state of small rivers that define the water regime of the territory, as well as the water supply of larger rivers, the quality of their waters is a matter of a serious concern. The ecosystems of watercourses in urban areas exposed to pollution by industrial and domestic wastes are under the maximum anthropogenic load. Bioindicative methods, which let to assess directly the status of aquatic ecosystems and their individual components, occupy an important place in the system of ecological monitoring of water bodies. Plants respond to toxicants in an aquatic habitat by the abnormality of biosynthesis of chlorophyll, carotenoids and other pigments, change of mineral balance, phytohormones, which leads to a change in their reproductive differentiation. In this regard, water quality assessment was carried out on the basis of chemical analysis and bioindication concerning Sagittaria sagittifolia populations in the upper and middle stream ways of the river Tyosha flowing through the Nizhny Novgorod region. The article presents the results of some organoleptic and chemical parameters such as pH level of overall hardness, concentration of nitrates and nitrites, ions of ammonium, phosphates, mercury, concentration of oxygen and carbon dioxide in the water. It was detected that there were exceeding quantities of ammonium ions, nitrite ions, phosphates in the water of all ranges of the river Tyosha, and also high content of iron in the downstreams of the river. The findings suggest that the reproductive structure of arrowhead inflorescences can serve as a bio-indicator of the degree of water pollution. The harder the environmental conditions of the plant habitat in the water body, the more intensive is a shift in the ratio of flowers to the feminine side. It has been shown that due to the deterioration of environmental conditions, the number of compound inflorescences of the arrowhead and the numbers of whorls in them decrease and, on the other hand, there is an increase in the percentage of plants with simple typical inflorescences. A credible shift in the reproductive ratio of arrowhead inflorescences to the female side is spotted on the downstream river station near Lukoyanov and industrial community Shatky, where the complex of environmental factors for its growth is the least favorable. It was established that anthropogenic pollution of the river has a negative effect on the reproductive sphere of Sagittaria sagittifolia, causing a reduction in pollen fertility, which is confirmed by the chemical analysis of water. On the basis of the studies the assessment of the ecological status of the water in the Tyosha river was given.

scholarly journals Assessment of the ecological status of small rivers in urban areas.

2018 ◽  
Vol 2 (4) ◽  
pp. 56-62
Author(s):  
Yana Pysanko ◽  
Svitlana Madzhd
Keyword(s):  
Aquatic Ecosystem ◽  
Urban Areas ◽  
Ecological Status ◽  
Statistical Processing ◽  
Urban Systems ◽  
Small Rivers ◽  
Urban Rivers ◽  
Quality Class ◽  
Considerable Research

Rivers are important components of many urban systems, and research into urban rivers are considerable research. The object of the research is technogenically transformed aquatic ecosystem of small rivers passing through urban areas of Kyiv city. These small rivers are tributaries of the Irpin River. The study used an ecosystem-basin approach, statistical processing of data. The complex research on patterns of their development for the long-term period were made, the quality class of water and indexes characteristic were ostended.

Classroom Management

2016 ◽  
Vol 1 (1) ◽  
pp. 201
Author(s):  
Elida Kurti
Keyword(s):  
Classroom Management ◽  
General Education ◽  
Urban Areas ◽  
Teaching And Learning ◽  
Educational Institutions ◽  
Important Place ◽  
Rural And Urban Areas ◽  
Rural And Urban ◽  
Intellectual Level

This paper aims to reflect an effort to identify the problems associated with the educational learning process, as well as its function to express some inherent considerations to the most effective forms of the classroom management. Mentioned in this discussion are ways of management for various categories of students, not only from an intellectual level, but also by their behavior. Also, in the elaboration of this theme I was considering that in addition to other development directions of the country, an important place is occupied by the education of the younger generation in our school environments and especially in adopting the methods of teaching and learning management with a view to enable this generation to be competitive in the European labor market. This, of course, can be achieved by giving this generation the best values of behavior, cultural level, professional level and ethics one of an European family which we belong to, not just geographically. On such foundations, we have tried to develop this study, always improving the reality of the prolonged transition in the field of children’s education. Likewise, we have considered the factors that have left their mark on the structure, cultural level and general education level of children, such as high demographic turnover associated with migration from rural and urban areas, in the capacity of our educational institutions to cope with new situations etc. In the conclusions of this study is shown that there is required a substantial reform even in the pro-university educational system to ensure a significant improvement in the behavior of children, relations between them and the sound quality of their preparation. Used literature for this purpose has not been lacking, due to the fact that such problems are usually treated by different scholars. Likewise, we found it appropriate to use the ideas and issues discussed by the foreign literature that deals directly with classroom management problems. All the following treatise is intended to reflect the way of an effective classroom management.

scholarly journals IMPACT OF THEILERIOSIS ON MILK IN NATURALLY INFECTED COWS AND BUFFALOES AT HYDERABAD

2017 ◽  
Vol 5 (8) ◽  
pp. 36-42
Author(s):  
M.I. Memon ◽  
Memon ◽  
Kachiwal ◽  
Soomro ◽  
Meh- ja- been Memon ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Urban Areas ◽  
Infected Cattle ◽  
Financial Loss ◽  
Total Solids ◽  
Financial Losses

Study was conducted to investigate the consequences of Theileriosis in naturally infected cattle and buffaloes of urban and peri urban areas of Hyderabad. Chemical analysis of milk of infected cows and buffaloes revealed that protein, ash and lactose were significantly declined (P<0.05) whereas, fat and total solids were significantly increased (P<0.05) in Theileria infected cows and buffaloes, but pH and acidity was unaffected. Financial losses occur in terms of reduced quality and severely decreased quantity of milk and meat. The total financial loss including the mortality and decreased quantity of milk and meat was recorded of Rs. 0.17 million / animal in the current study. Theileriosis is one of the main causes of financial losses for livestock holders.

scholarly journals Ivano-Frankivsk City Groundwater Landscapes Ecological State

2017 ◽  
Vol 11 (2) ◽  
pp. 247-253
Author(s):  
Gutsuleak Vasyl ◽  
Fomenko Nataliia
Keyword(s):  
Chemical Analysis ◽  
Urban Areas ◽  
Potable Water ◽  
Ecological State ◽  
Ecological Situation ◽  
Geochemical Monitoring ◽  
Geochemical Evaluation ◽  
Calculation Results ◽  
Maximum Allowable Concentrations ◽  
The City

Abstract Ecological state of groundwater used as a source of potable water in urban areas of the city of Ivano-Frankivsk and its satellites is dealt with. Groundwater is assessed as a ratio between the content of pollutants and the relevant hygiene standards. Environmental assessment grounded on the materials of chemical analysis (74 samples) compared to maximum allowable concentrations and background values. Calculations of the value of hazard and the intensity of pollutions were the methods of ecological and geochemical evaluation of groundwater contamination. Based on calculation results, geochemical maps were compiled depicting satisfactory, hazardous and critical degrees of hydro-ecological situation. Developed maps can serve for the purposes of further geochemical monitoring of ecological situation.

scholarly journals Its present state overmoistened landscape systems of Lviv Region

2014 ◽  
pp. 347-354
Author(s):  
N. Blazhko
Keyword(s):  
Key Words ◽  
Present State ◽  
Environmental Conditions ◽  
Ecological Status ◽  
Ecological Condition ◽  
Wetland Landscape ◽  
Current State ◽  
Destabilizing Factors ◽  
Good Ecological Status ◽  
Stabilizing Factors

Reviewed the current state of wetland landscape systems (PLC) Lviv region. Highlighted areas PLC of good ecological status, with a satisfactory ecological condition and unsatisfactory environmental conditions. Key words: overmoistened landscape systems (OLS)peat, peat, drainage improvement, environmental stabilizing factors, environmental destabilizing factors.

scholarly journals Landscape and Climate Influence the Patterns of Genetic Diversity and Inbreeding in Cerrado Plant Species

Diversity ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 421
Author(s):  
Luciana Cristina Vitorino ◽  
Mateus Neri Oliveira Reis ◽  
Layara Alexandre Bessa ◽  
Ueric José Borges de Souza ◽  
Fabiano Guimarães Silva
Keyword(s):  
Genetic Diversity ◽  
Plant Species ◽  
Environmental Conditions ◽  
Urban Areas ◽  
Isolation By Distance ◽  
Buffer Size ◽  
Mean Annual Temperature ◽  
Plant Populations ◽  
Landscape Features ◽  
Center Periphery

The anthropization of the landscape of the Cerrado biome that has occurred over the past few decades has fragmented its natural environments, impacting the connectivity of the plant populations and altering their gene flow. Plant species may also reduce population size in response to sub-optimal climatic and environmental conditions, and observed distribution patterns may align with theoretical schemes, such as the center–periphery model, that is, it is possible that populations on the edge have lower genetic diversity than center populations, theoretically submitted to environmental conditions closer to the optimum. In this context, we evaluate whether the genetic diversity and inbreeding coefficients of Cerrado plant species are affected by landscape features and climate characteristics, and in particular, if the distribution of the genetic diversity of these plants is consistent with the center–periphery model. To do this, we conducted a literature search for genetic studies of Cerrado plant populations using Scopus, Web of Science, and Scielo databases and the species found were used as a proxy to explore patterns throughout the biome. The data were analyzed using generalized linear mixed models (GLMM) and multiple matrix regressions (MMRRs) to evaluate the effects of landscape features and climatic variables on the observed (HO) and expected heterozygosity (HE), allelic richness (AR) and inbreeding (Fis) patterns of the local populations. The landscape was evaluated in terms of the percentage land cover of agriculture (AG), forestry (FO), remnant vegetation (RV), urban areas (UA), pasture (PA), and water (WA) within buffers of 1 km, 3 km, and 5 km around the study populations. We analyzed 121 populations of 31 plant species. The GLMMs showed that HO was affected by FO regardless of buffer size, while HE was also affected by FO, but also by WA and UA. AR was affected by WA and UA in all three buffer zones while the Fis was affected by FO and AU. The MMRRs showed that WA may affect HO, HE, and Fis within the 1 km buffer, while FO affects HO and UA affects AR within the 5 km buffer. In the case of the 1 km and 3 km buffers, however, the geographic distance between populations was identified as a factor determining the genetic diversity and inbreeding indices, indicating that isolation by distance may be an important factor defining the breeding patterns of the Cerrado plant populations. The GLMMs and MMRRs also showed that the mean annual temperature (MAT) and, to a lesser extent, isothermality (ISO) can explain the variation in genetic diversity observed in the Cerrado plant populations. We also found that the center–periphery model fits the distribution pattern observed in most of the species evaluated, including Annona crassiflora,Annona coriacea, Copaifera langsdorffii, and Eugenia dysenterica. Our results indicate that changes in the climate and the landscape of Brazilian Cerrado must be considered carefully to guarantee minimizing the impacts of these processes on the genetic diversity of Cerrado plant species and ensuring the long-term conservation of these species in this biome.

Behaviour of Pigeon Excreta on Masonry Surfaces

2018 ◽  
Vol 23 (1) ◽  
pp. 15-28 ◽  
Author(s):  
Dirk HR Spennemann ◽  
Melissa Pike ◽  
Maggie J Watson
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Building Material ◽  
Urban Areas ◽  
Real Life ◽  
The Body ◽  
Individual Bird ◽  
Bird Droppings ◽  
Pigeon Droppings ◽  
The Impact

Abstract Pigeon droppings are implicated in spoiling and decay of buildings. Several studies have examined the effects and chemistry of accumulations of pigeon droppings under highly localised pigeon roosts. Scant information exists on the impact caused by individual pigeon droppings at perch sites, even though these constitute the majority of bird use in urban areas. This study experimentally examined the processes that affect masonry immediately after pigeon excreta have been voided from the body and what effects discrete, fresh pigeon droppings have on different kinds of sandstone. The experiments demonstrated the susceptibility of freshly deposited excreta to environmental conditions (relative humidity and precipitation). In real-life situations, with pigeon excreta deposited on window ledges, cornices and parapets, the majority of damage would occur within the first two weeks of deposition. After that, the majority of individual droppings would have either dissolved or desiccated to such a degree that they would have rolled off. Much of the observed staining is superficial. While individual bird droppings make a building look dirty, even for months at a time, the effect on the building material is not substantial unless other factors come into play such as colonisation of the excreta by mould or leaching of salts from the excreta.

scholarly journals 2008–2017 Bogota River Water Quality Assessment based on the Water Quality Index

2019 ◽  
Vol 11 (6) ◽  
pp. 1668 ◽  
Author(s):  
Daissy Milena Díaz-Casallas ◽  
Mario Fernando Castro-Fernández ◽  
Elvira Bocos ◽  
Carlos Enrique Montenegro-Marin ◽  
Rubén González Crespo
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Water Quality Index ◽  
Quality Index ◽  
Wastewater Treatment Plants ◽  
Ecological Status ◽  
Monitoring And Evaluation ◽  
Water Quality Assessment ◽  
Sampling Station ◽  
Quality Of Water

This article provides a deep analysis of the water quality at the upper basin of the Bogota River (Colombia) between 2008 and 2017. The Water Quality Index has been the indicator employed to determine the ecological status of the river. This index was chosen in order to normalize the analysis, given that it is commonly used by the Institute of Hydrology, Meteorology and Environmental Studies, a government agency of the Ministry of Environment and Sustainable Development of Colombia, to determine the state of surface effluents. The results obtained were organized in a double-entry matrix in order to relate the variables of the sample period and the sampling station. The research revealed an insufficient quality of water, demonstrating that the high stretch of the Bogota River basin has, in general, regular or acceptable water quality, while only five stations showed an acceptable status. Surprisingly, the stations located close to the wastewater treatment plants of the municipalities of Choconta, Suesca, Gachancipa, and Tocancipa, as well as Rio Negro, have a poor water quality, discharging a high load of contaminants into the river. Although great efforts have been made by Colombian authorities to restore the critical state of the majority of their aquatic ecosystems, recent implementation of policies and instruments have not shown significant achievements yet. For this reason, this study aims to present a powerful decision-tool for the monitoring and evaluation of correction measures implemented on this river basin. The data used in this research were provided by the Regional Autonomous Corporation of Cundinamarca.

scholarly journals Chemical pollution imposes limitations to the ecological status of European surface waters

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Leo Posthuma ◽  
Michiel C. Zijp ◽  
Dick De Zwart ◽  
Dik Van de Meent ◽  
Lidija Globevnik ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Waters ◽  
Water Quality Management ◽  
Ecological Status ◽  
Water Quality Assessment ◽  
Current Approach ◽  
Toxicity Tests ◽  
Chemical Pollution ◽  
Applied Ecology ◽  
Good Ecological Status

Abstract Aquatic ecosystems are affected by man-made pressures, often causing combined impacts. The analysis of the impacts of chemical pollution is however commonly separate from that of other pressures and their impacts. This evolved from differences in the data available for applied ecology vis-à-vis applied ecotoxicology, which are field gradients and laboratory toxicity tests, respectively. With this study, we demonstrate that the current approach of chemical impact assessment, consisting of comparing measured concentrations to protective environmental quality standards for individual chemicals, is not optimal. In reply, and preparing for a method that would enable the comprehensive assessment and management of water quality pressures, we evaluate various quantitative chemical pollution pressure metrics for mixtures of chemicals in a case study with 24 priority substances of Europe-wide concern. We demonstrate why current methods are sub-optimal for water quality management prioritization and that chemical pollution currently imposes limitations to the ecological status of European surface waters. We discuss why management efforts may currently fail to restore a good ecological status, given that to date only 0.2% of the compounds in trade are considered in European water quality assessment and management.

Sign in / Sign up

Export Citation Format

Share Document