Bio-assessment of surface waters in the south-east of Gaziantep (Turkey) using diatom metrics

2019 ◽  
Vol 55 ◽  
pp. 11
Author(s):  
Abuzer Çelekli ◽  
Hamdullah Arslanargun
Keyword(s):  
Surface Waters ◽  
Ecological Status ◽  
Pollution Index ◽  
Ecological Condition ◽  
Diatom Assemblages ◽  
Sensitive Species ◽  
The South ◽  
Explanatory Variables ◽  
Trophic Index ◽  
High Nutrient

Diatom metrics can be used to identify the ecological status of water bodies due to their good responses to anthropogenic disturbances. Our study is aimed to use diatom metrics developed from different ecoregions for assessing the ecological status of 11 surface waters in the south-east of the Gaziantep catchment (Turkey). Ecological characterizations of the sampling stations were introduced by Trophic Index Turkey (TIT), Trophic Index (TI), and Eutrophication and/or Pollution Index-Diatom (EPI-D). According to TIT and TI, Karkamış Reservoir had a good ecological condition while it had high ecological status based on EPI-D. This good ecological condition was approved by the presence of pollution sensitive species (e.g., Cymbella affinis, Encyonema minutum, E. silesiacum, Cymbopleura amphicephala, and Navicula radiosa) and relatively low nutrients. Kayacık (TIT ranging 3.15–3.23) and Hancağız (TIT = 3.35) reservoirs had poor and bad ecological conditions, respectively. High nutrient, conductivity, and pollution-tolerant species (e.g., Nitzschia amphibia, N. palea, N. umbonata, N. linearis, N. phyllepta, Tryblionella calida, and Pinnularia brebissonii) supported the ecological statuses of the Hancağız and Kayacık reservoirs. The first two axes of canonical correspondence analysis explained 0.943 of relationships between diatom species and explanatory variables. Explanatory variables, e.g., calcium, conductivity, orthophosphate, nitrate, nitrite, sodium, pH, and sulfur, had strong impacts on the distribution of diatom assemblages among the sampling stations. TIT and TI separated ecological statuses of sampling stations in the south-east of the Gaziantep catchment, which correlated well with the evidence of water chemistry and response of diatom assemblages.

scholarly journals ORGANIZATION OF SURFACE WATER MONITORING IN SUMY REGION

2021 ◽  
pp. 17-22
Author(s):  
Larysa Hurets ◽  
Olena Vakarchuk ◽  
Inna Trunova ◽  
Roman Ponomarenko ◽  
Eleonora Darmofal ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Water Resources Management ◽  
Surface Waters ◽  
Ecological Status ◽  
Ecological Condition ◽  
The State ◽  
Water Monitoring ◽  
Resources Management ◽  
Transboundary Watercourses

The article presents an analysis of water monitoring organization in the Sumy region. The reform of water resources management has placed the main burden on the implementation of the state water policy and ensuring the proper ecological condition of the water basin at the regional level of management. The European approach in the field of water resources management pays attention to water monitoring, which is an integral part of the state system of environmental monitoring in Ukraine. An analysis of implementation the basin principle in the region had been conducted. There are two sub-basins in the region: Desna Sub-Basin and Middle Dnieper Sub-Basin. Within the Desna sub-basin 121 massifs of surface waters have been identified, within the middle Dnieper sub-basin 230 massifs have been identified. The analysis of monitoring data on the state of surface waters, on the organization of monitoring of transboundary watercourses is carried out. The study found that farms have a significant impact on the condition of rivers. Due to the aggravation of the political situation, monitoring of transboundary watercourses is carried out only on the territory of Ukraine. The beginning of the introduction of a new approach to monitoring in Sumy region lays the foundations for the accumulation, systematization of data on the state of surface water bodies with the subsequent possibility of analyzing the existing situation with effective management decisions to achieve "good" ecological status of river basins.

Ecological status estimation of eight creeks in the Lake Sapanca Basin (Sakarya, Turkey) using diatom indices

2021 ◽  
Vol 57 ◽  
pp. 14
Author(s):  
Tuğba Ongun Sevindik ◽  
Esra Alemdar ◽  
Ali Uzun ◽  
Tolga Coşkun ◽  
Hatice Tunca
Keyword(s):  
Seasonal Pattern ◽  
Ecological Status ◽  
Environmental Parameters ◽  
Ecological Condition ◽  
Specific Conductance ◽  
The Other ◽  
Running Waters ◽  
Diatom Assemblages ◽  
Ecological Conditions ◽  
Diatom Indices

It is important to determine the water quality of the creeks in the Lake Sapanca basin since it is used for drinking water supply. For this purpose, environmental parameters and diatom assemblages as biological quality components were investigated to determine the ecological status of eight creeks with monthly intervals between March 2015 and February 2016. During the studied period, 19 taxa increased their relative abundance higher than 30% in at least one sample and showed a different seasonal pattern. Main nutrients [(nitrate-nitrogen, orthophosphate, total phosphorus (TP)] and some other parameters (specific conductance, temperature, pH, and dissolved oxygen) had strong impacts on the distribution of diatom assemblages. The ecological status of the creeks was characterized by using four different diatom indices, however, only Trophic Index Turkey (TIT) represented significant positive correlations with log (TP) gradient and separated the creeks as good and moderate ecological status. According to TIT, the 4th and 6th stations had a good ecological condition and were characterized by pollution-sensitive species such as Cymbella affinis, Reimeria sinuata, and Nitzschia dissipata. On the other hand, TIT resulted in the other stations having moderate ecological conditions, which had high nutrient levels and EC. Moreover, the occurrence of pollution-tolerant taxa such as Gomphonema angustatum, Ulnaria ulna, and Achnanthidium affine endorsed the moderate ecological conditions in these creeks. Based on the results, the TIT as a biological metric could be a useful tool for the assessment of running waters in the Sakarya river basin.

scholarly journals Use of Biotesting Methods for Assessing the Ecological Condition of Surface Waters

2021 ◽  
Keyword(s):  
Surface Waters ◽  
System Analysis ◽  
Ecological Status ◽  
Ecological Condition ◽  
Economic Consequences ◽  
Chemical Pollution ◽  
Environmental Consequences ◽  
Sources Of Pollution ◽  
Basic Set ◽  
Water Legislation

Purpose. Analysis of national and foreign experience in solving the problem of chemical pollution of surface waters and its economic consequences in accordance with the provisions of European legislation. Methods. System analysis. Results. Selection of the optimal set of biotesting methods for assessing the environmental consequences of chemical pollution of surface waters; study of the system of environmental liability, which operates in European and other foreign countries, and national regulations on the recovery of damages for violations of water legislation. The analysis of foreign and national sources on the use of biotesting techniques to assess the ecological status of surface waters and determine the toxic properties of water and chemicals. In world practice, a biotesting method is used to obtain data on the effects of hazardous toxic chemicals on aquatic ecosystems. Biotests are available and cheap (when using specially designed modifications for practical needs), do not require special training of performers and can be easily mastered in practical laboratories. Conclusions. To assess and control the quality of surface waters and their sources of pollution in accordance with the recommendations of the Water Framework Directive 2000/60 / EC, biotesting techniques are used using a "basic set of taxa" - algae, crustaceans and fish.

scholarly journals Environmental problems of water resources the Busk district

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
O. V. Mudrik ◽  
R. P. Paranyak ◽  
O. V. Matsuska
Keyword(s):  
Surface Waters ◽  
Ecological Status ◽  
Ecological Condition ◽  
Ammonium Ions ◽  
Fixed Position ◽  
Limit Values ◽  
Treated Sewage ◽  
The City ◽  
Hydrological Monitoring ◽  
Position State

There is studied the ecological status of surface waters in Busk district. The attention is focused on the largest river Western Bug and its tributaries which essentially influence on the ecological condition. The analysis of hydrological monitoring in the basin of the Western Bug is done. Analysis of water pollution in the river is performed with use of fixed position state hydrological monitoring system posts. There are studied the data concerning pollution indicators for 2015 year and 3 seasons of 2016. A comparison of contamination in two points outside the district is carried out. There are considered river Poltva before its waters reach the district and flow into Western Bug and the river Western Bug after it lefts the district. The exceeding of the threshold limit values for some indicators is revealed. In all cases there is a slight excess of the TLV over the content of iron and ammonium ions. In Poltva have been considerable (3–6 times) exceeding the TLV for COD and BOD5, ammonium salt 8.4 times, total iron – 4.3 times, nitrites – in 6.75 times, suspended solids – 3.3 times, phenol – at 2.45 times. Therefore, the section of the city Buzka to the city Kamenka–Bug, Radekhiv bridge river water is not suitable for any water use. The self–cleaning of the water is happening within the district is and the second point of monitoring shows these indicators are within limits. The largest source of organic pollutants and nutrients into Western Bug River is the river Poltva. Insufficiently treated sewage of Lviv increases the level of water contamination. In the district however there are also a source of pollution of surface water with ions of ammonium and iron. For their identification the further observation are required.

scholarly journals Mixtures of chemicals are important drivers of impacts on ecological status in European surface waters

2019 ◽  
Vol 31 (1) ◽  
Author(s):  
Leo Posthuma ◽  
Werner Brack ◽  
Jos van Gils ◽  
Andreas Focks ◽  
Christin Müller ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Surface Waters ◽  
Water Quality Management ◽  
Ecological Status ◽  
Ecological Impacts ◽  
Chemical Pollution ◽  
Individual Species ◽  
Integrated Analysis ◽  
Chemical Mixtures

Abstract The ecological status of European surface waters may be affected by multiple stressors including exposure to chemical mixtures. Currently, two different approaches are used separately to inform water quality management: the diagnosis of the deterioration of aquatic ecosystems caused by nutrient loads and habitat quality, and assessment of chemical pollution based on a small set of chemicals. As integrated assessments would improve the basis for sound water quality management, it is recommended to apply a holistic approach to integrated water quality status assessment and management. This allows for estimating the relative contributions of exposure to mixtures of the chemicals present and of other stressors to impaired ecological status of European water bodies. Improved component- and effect-based methods for chemicals are available to support this. By applying those methods, it was shown that a holistic diagnostic approach is feasible, and that chemical pollution acts as a limiting factor for the ecological status of European surface waters. In a case study on Dutch surface waters, the impact on ecological status could be traced back to chemical pollution affecting individual species. The results are also useful as calibration of the outcomes of component-based mixture assessment (risk quotients or mixture toxic pressures) on ecological impacts. These novel findings provide a basis for a causal and integrated analysis of water quality and improved methods for the identification of the most important stressor groups, including chemical mixtures, to support integrated knowledge-guided management decisions on water quality.

scholarly journals Relationship between Bacterial Community Composition and Bottom-Up versus Top-Down Variables in Four Eutrophic Shallow Lakes

2002 ◽  
Vol 68 (10) ◽  
pp. 4740-4750 ◽  
Author(s):  
Koenraad Muylaert ◽  
Katleen Van der Gucht ◽  
Nele Vloemans ◽  
Luc De Meester ◽  
Moniek Gillis ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Shallow Lakes ◽  
Bacterial Community Composition ◽  
Top Down ◽  
Bottom Up ◽  
Rdna Genes ◽  
Explanatory Variables ◽  
High Nutrient ◽  
Eutrophic Shallow Lakes

ABSTRACT Bacterial community composition was monitored in four shallow eutrophic lakes during one year using denaturing gradient gel electrophoresis (DGGE) of PCR-amplified prokaryotic rDNA genes. Of the four lakes investigated, two were of the clearwater type and had dense stands of submerged macrophytes while two others were of the turbid type characterized by the occurrence of phytoplankton blooms. One turbid and one clearwater lake had high nutrient levels (total phosphorus, >100 μg liter−1) while the other lakes had relatively low nutrient levels (total phosphorus, <100 μg liter−1). For each lake, seasonal changes in the bacterial community were related to bottom-up (resources) and top-down (grazers) variables by using canonical correspondence analysis (CCA). Using an artificial model dataset to which potential sources of error associated with the use of relative band intensities in DGGE analysis were added, we found that preferential amplification of certain rDNA genes over others does not obscure the relationship between bacterial community composition and explanatory variables. Besides, using this artificial dataset as well as our own data, we found a better correlation between bacterial community composition and explanatory variables by using relative band intensities compared to using presence/absence data. While bacterial community composition was related to phytoplankton biomass in the high-nutrient lakes no such relation was found in the low-nutrient lakes, where the bacterial community is probably dependent on other organic matter sources. We used variation partitioning to evaluate top-down regulation of bacterial community composition after bottom-up regulation has been accounted for. Using this approach, we found no evidence for top-down regulation of bacterial community composition in the turbid lakes, while grazing by ciliates and daphnids (Daphnia and Ceriodaphnia) was significantly related to changes in the bacterial community in the clearwater lakes. Our results suggest that in eutrophic shallow lakes, seasonality of bacterial community structure is dependent on the dominant substrate source as well as on the food web structure.

SENSITIVITY OF FORSYTHIA POLLEN TO THE FACTORS OF THE ENVIRONMENT OF THE MEGAPOLIS

2021 ◽  
pp. 56-74
Author(s):  
Matiashuk R. ◽  
Tkachenko I.
Keyword(s):  
Air Pollution ◽  
Ecological Status ◽  
Pollution Index ◽  
Weather Conditions ◽  
Botanical Garden ◽  
Control Value ◽  
Adverse Weather ◽  
Long Time ◽  
Growing Conditions ◽  
High Level

The sensitivity of the reproductive structures of Forsythiasuspensato the complex influence of undifferentiated environmental factors has been studied.The monitoring sites are located in 15 different park ecosystems in 6 administrative districts of Kyiv. Data from the Borys Sreznevsky Central Geophysical Observatory (air pollution index (API) and meteorological conditions for 2018-2020) were used to assess the conditions of the growthenvironment. The influence of a complex of ecologically important factors during the flowering offorsythia on the quality of the formedpollen is noted. Thus, growing plantsfor a long time in conditions with a low level of air pollution (APIup to 5.0) in abnormal weather conditions in 2020,40-50% less fertile grainswere formed. And forplants, which grow in areas with increasedlevel (API5.0-7.0) and high level (API7.0-14.0) of air pollution, the share of fertile grains in the pollen population decreased by 60-80%. In the closed bud,the pollen has higher resistance to a complex of exogenous growth factors. Forsythia plants, which are located in large parklands, lose less pollen quality in adverse weather conditions and affected byurbotechnogenic factors. F. suspensa is an acceptable indicator of the level of environmental pollution by the deviation of pollen fertility from the control value. In areas with high aerogenic load, for example, areas with large highways (Bus Station «Darnytsia»), as well as with a significant recreational load (HolosiivskyiPark, Recreation Park on the Olena Teliha Street) much smaller pollen is formed. Itis noted that the conditions of forsythia growth affect the quantitative indicators of the formed pollen not only in the flower but also in the closed bud, which confirms the chronic effect of the complex of ingredients of aerotechnogenic emissions on plants of this species. The coefficient of sterility of pollen (CS) was used to objectively compare the data of 2019 and 2020 on the condition of the generative organs of F. suspensa in the studied areas. The calculation of the CS confirmed that in the closedbud pollen has a higher resistance to exogenous factors. In areas with high and increased levels of air pollution,during budding and flowering of plants (March-May,) there is a much higher CS of pollen of F. suspensа. Significant parkland territoriesof the city (for example, HolosiivskyiPark, Botanical Garden named after O. V. Fomin) provide less stressful conditions for growth and development of plants, even with the "very high" level of air pollution (ISA above 14.0) observed in April 2020 on this territory.The study of the susceptibility of F. suspensаpollen to growing conditions will be continued, as the prospects of using this species for bioindication of ecological status and zoning of park ecosystems of Kyiv according to the gradient of anthropogenic impact have been revealed.Key words:forsythia, fertility, coefficient of sterility of pollen, bioindication. Проведене дослідження чутливості репродуктивних структур Forsythiasuspensaдо комплексного впливу недиференційованих факторів навколишнього середовища. Моніторингові ділянки розташовані в 15 різних паркових екосистемах 6 адміністративних районівКиєва. Для оцінки умов середовища вирощування рослин використані дані Центральної геофізичної обсерваторії імені Бориса Срезневського (індекс забруднення атмосферного повітря (ІЗА) та метеорологічні умови за 2018-2020 рр.). Відмічено вплив комплексу екологічно важливих факторів (за показниками відхилення від норми середньої місячної температури повітря та місячної кількості опадів у Києві) уперіод квітування форзиції на якість сформованого пилку. Так, за тривалої експозиції рослин в умовах з низьким рівнем забруднення повітря (ІЗА до 5,0) в аномальних погодних умовах 2020 р. сформувалось на 40-50% менше фертильних зерен. А у форзиції, яка росте на територіях з підвищеним (ІЗА 5,0-7,0) та високим (ІЗА 7,0-14,0) рівнями забруднення частка фертильних зерен в популяції пилку зменшилась на 60-80%. У закритому бутоні пилок має вищу стійкість до комплексу екзогенних факторів середовища зростання. Рослини форзиції, які розташовані у значних за площею паркових насадженнях, менше втрачають якість пилку за несприятливих погодних умов та дії урботехногенних чинників. За відхиленням показника фертильності пилку від контрольного значення F. suspensaє допустимим індикатором рівня забруднення середовища. На територіях з підвищеним аерогенним навантаженням, наприклад, ділянки з автотранспортними магістралями (Автостанція «Дарниця»), а також зі значним рекреаційним навантаженням (Голосіївський парк імені М. Рильського, Парк відпочинку по вул. Олени Теліги)формується значно дрібніший пилок. Відмічено, що умови росту позначаються на кількісних показниках сформованого пилку не лише в квітці, але й в закритому бутоні, що підтверджує хронічний вплив комплексу інгредієнтів аеротехногенних викидів нарослини цього виду. Для об’єктивного співставлення даних 2019 і 2020 рр. щодо стану генеративних органів F. suspensaна досліджених ділянках був використаний коефіцієнт стерильності (КС) пилку. Розрахунок КС підтвердив, що в закритому бутоні пилок має вищу стійкість до впливу екзогенних чинників. Вищий КС був у F. suspense, з ділянок, на яких в період бутонізації і квітування рослин (березень-травень) відмічений високий і підвищений рівень забруднення атмосфери. Значні за площею паркові насадження міста (наприклад, Голосіївський парк, Ботанічний сад ім.акад. О.В. Фоміна) забезпечують менш напружені умови росту і розвитку рослин навіть при відміченому в квітні 2020 р. «дуже високому» рівні забруднення повітря (ІЗА вище 14,0) на цих територіях. Дослідження чутливості пилку F. suspenseдо умов вирощування буде продовжене,оскільки виявлена перспективність використання цього виду для біоіндикації екологічного стану та зонування паркових екосистем Києва за градієнтом антропогенного впливу.Ключові слова: форзиція, фертильність, індекс стерильності, біоіндикація.

Nutrients, Chlorophyll, and Internal Tides in the St. Lawrence Estuary

1976 ◽  
Vol 33 (12) ◽  
pp. 2747-2757 ◽  
Author(s):  
Jean-Claude Therriault ◽  
Guy Lacroix
Keyword(s):  
Surface Waters ◽  
Internal Tides ◽  
Upstream Region ◽  
Mixing Process ◽  
Low Oxygen ◽  
Lawrence Estuary ◽  
Deep Waters ◽  
High Nutrient ◽  
Phosphate Nitrate ◽  
St Lawrence Estuary

Tide-dependent variations of temperature, salinity, dissolved oxygen, phosphate, nitrate, and chlorophyll a support the existence of internal tides (longitudinal and transversal) in the St. Lawrence estuary. Vertical oscillations of the poorly oxygenated and nutrient-rich intermediate and deep waters of the estuary have been documented at the head of the Laurentian Channel, the region in which the internal tides are thought to be generated. Penetration of intermediate waters (high-nutrient and low-oxygen concentrations) beyond the Laurentian Channel associated with the internal tides and linked with an intense mixing process in the upstream region permits the nutrient enrichment of the surface waters and their eventual advection in the seaward direction.

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.

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