Environmental monitoring of Micro Prespa Lake basin (Western Macedonia, Greece): hydrogeochemical characteristics of water resources and quality trends

Tziritis, Evangelos

doi:10.1007/s10661-014-3719-4

Cited by 22 publications

(2 citation statements)

References 30 publications

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“…FA seeks to reproduce intercorrelations among variables, in which the factors represent their common variance. The relationship among several observed quantitative variables is represented in terms of a few underlying, independent variables, called factors, which may not be directly measured or even measurable [41]. The exact number of factors was chosen by Kaiser criterion [42] in which factors with eigenvalues smaller than 1 were eliminated.…”

Section: Data Processingmentioning

confidence: 99%

Hydrogeochemical and Hydrodynamic Assessment of Tirnavos Basin, Central Greece

Vrouhakis

Tziritis²,

Παναγόπουλος³

et al. 2021

Water

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A combined hydrogeochemical and hydrodynamic characterization for the assessment of key aspects related to groundwater resources management was performed in a highly productive agricultural basin of the Thessaly region in central Greece. A complementary suite of tools and methods—including graphical processing, hydrogeochemical modeling, multivariate statistics and environmental isotopes—have been applied to a comprehensive dataset of physicochemical analyses and water level measurements. Results revealed that the initial hydrogeochemistry of groundwater was progressively impacted by secondary phenomena (e.g., ion exchange and redox reactions) which were clearly delineated into distinct zones according to data processing. The progressive evolution of groundwater was further verified by the variation of the saturation indices of critical minerals. In addition, the combined use of water level measurements delineated the major pathways of groundwater flow. Interestingly, the additional joint assessment of environmental isotopes revealed a new pathway from E–NE (which had never before been validated), thus highlighting the importance of the joint tools/methods application in complex scientific tasks. The application of multivariate statistics identified the dominant processes that control hydrogeochemistry and fit well with identified hydrodynamic mechanisms. These included (as dominant factor) the salinization impact due to the combined use of irrigation water return and evaporitic mineral leaching, as well as the impact of the geogenic calcareous substrate (mainly karstic calcareous formations and dolostones). Secondary factors, acting as processes (e.g., redox and ion exchange), were identified and found to be in line with initial assessment, thus validating the overall characterization. Finally, the outcomes may prove to be valuable in the progression toward sustainable groundwater resources management. The results have provided spatial and temporal information for significant parameters, sources, and processes—which, as a methodological approach, could be adopted in similar cases of other catchments.

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Section: Data Processingmentioning

confidence: 99%

Hydrogeochemical and Hydrodynamic Assessment of Tirnavos Basin, Central Greece

Vrouhakis

Tziritis²,

Παναγόπουλος³

et al. 2021

Water

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“…Warming can affect the availability of nutrients in lakes [20,21,53], changing the dynamics [52]. In Lesser Prespa a mean annual temperature of 16.7˚C, with a median maximum of 26.7 in July and August, was recorded in 2012-2013 [54], while an annual mean of 13.1 was found in 1990-1991 [13]. In the nutrient treatments, the added nutrients may compensate the increased resource demand [55], as can happen in warming lakes by e.g.…”

Section: Plos Onementioning

confidence: 99%

Effects of guanotrophication and warming on the abundance of green algae, cyanobacteria and microcystins in Lake Lesser Prespa, Greece

et al. 2020

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Lake Lesser Prespa in Greece is a vital breeding habitat for the Dalmatian and Great White Pelican and a shelter for numerous rare and endemic species. However, eutrophication processes are distressing the lake system and the outbreaks of cyanobacterial blooms during the warm months may pose a threat to aquatic organisms due to the presence of microcystins (MCs). In this study we hypothesize that nutrients (eutrophication), nutrient-rich pelican droppings (guanotrophication) and warming (climate change) can affect the algal growth and MCs production in the water layer of Lake Lesser Prespa. Seston collected from three lake sites was incubated at ambient (20˚C) and high (30˚C) temperature with or without the addition of nutrients (nitrogen (N), phosphorus (P)), or pelican droppings. Results showed increased chlorophyll-a at higher temperature (30˚C). N addition yielded higher chlorophylla levels than the non-treated water or when only P was added. The addition of both N and P as well as the addition of pelican dropping resulted in the highest chlorophyll-a at both temperatures. Notably, in the dropping-treatments, cyanobacteria and MCs were promoted while changes were evoked in the relative contribution of toxic MC-variants. Guanotrophication may thus influence the cyanobacterial dynamics and most likely their toxicity profile at Lesser Prespa. OPEN ACCESS Citation: Maliaka V, Verstijnen YJM, Faassen EJ, Smolders AJP, Lürling M (2020) Effects of guanotrophication and warming on the abundance of green algae, cyanobacteria and microcystins in Lake Lesser Prespa, Greece. PLoS ONE 15(3): e0229148. https://doi.org/10.

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Pollution of Small Lakes and Ponds of the Western Balkans—Assessment of Levels of Potentially Toxic Elements

et al. 2021

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Small lakes and ponds are among the most sensitive ecosystems, vulnerable to changes that have little or no effect on larger water bodies. Therefore this topic should be given more attention around the world. Anthropogenic impacts, which have been extensively researched in larger water bodies, have been barely examined in small lakes and ponds. Considering that most of the studies are related to lakes bigger than 50 ha, a significant knowledge gap was left regarding small lakes and ponds. The same situation is in the Western Balkans, where studies related to pollutants in small lakes and ponds are limited. This chapter presents an overview of studies related to the contamination of small lakes and ponds of the Western Balkans, with special reference to pollution with potentially toxic elements PTEs. Since massive fish mortality happened several times, an assessment of PTEs in fish species Carassius gibelio from small Aleksandrovac Lake in Serbia is presented. The results indicate that fish muscle (meat) was exposed to the lower pressure of PTEs pollution than liver and gills, suggesting that, despite massive fish mortality, there was no risk for human health by fish consumption.Keywords Small water bodies • Fish • Human health risk • Aleksandrovac Lake IntroductionSmall water bodies, including ponds and small lakes, are freshwater ecosystems of high ecological relevance [1]. They occur in practically all terrestrial environments,

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Environmental monitoring of Micro Prespa Lake basin (Western Macedonia, Greece): hydrogeochemical characteristics of water resources and quality trends

Cited by 22 publications

References 30 publications

Hydrogeochemical and Hydrodynamic Assessment of Tirnavos Basin, Central Greece

Hydrogeochemical and Hydrodynamic Assessment of Tirnavos Basin, Central Greece

Effects of guanotrophication and warming on the abundance of green algae, cyanobacteria and microcystins in Lake Lesser Prespa, Greece

Pollution of Small Lakes and Ponds of the Western Balkans—Assessment of Levels of Potentially Toxic Elements

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