Analysis of factors driving stream water composition and synthesis of management tools—A case study on small/medium Greek catchments

Skoulikidis, Nikolaos Th.; Amaxidis, Yorgos; Bertahas, Ilias; Laschou, Sofia; Gritzalis, Konstantinos

doi:10.1016/j.scitotenv.2005.05.018

Cited by 111 publications

(99 citation statements)

References 29 publications

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“…, K ? , HCO 3 -, CO 3 2-, Cl -and SO 4 2-), silicate and nutrients (nitrate, nitrite, ammonia, total nitrogen, phosphate and total phosphorous) were analysed in the laboratory (for detailed description of analytical and quality control procedures see Skoulikidis et al 2006, Skoulikidis 2008a). For the evaluation and classification of the physicochemical status of the sites, the Nutrient Classification System (Skoulikidis et al 2006) was used.…”

Section: Methodological Design and Data Collectionmentioning

confidence: 99%

“…In addition, it was observed that the sites selected for macroinvertebrate sampling were not affected by pollution, thus ensuring that any differences in assemblages may result solely from hydrological changes. All sites selected were well oxygenated (dissolved oxygen C7 mg/L, average 8.7 mg/L) and their nutrient quality ranged, according to the classification system of Skoulikidis et al (2006), between high (9 sites) and good (2 sites). The start of ichthyological research coincided with the end of a period of hydrologically wet years; thus we assume that adequate time had been provided for fish communities to recover from past drought events.…”

Section: Impacts Of Water Stress On Biotamentioning

confidence: 99%

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Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece

et al. 2011

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Water stress in Mediterranean countries is the result of both variable and changing climatic conditions and widespread anthropogenic pressures. Evrotas, an intermittent river located in Southern Greece, was used as a case study to assess the impacts of water stress on Mediterranean lotic ecosystems. Based on hydrological analyses, it was revealed that during prolonged drought years, such as the summers of 2007 and 2008, the vast majority of the Evrotas riverbed was completely desiccated, primarily as a result of substantial water abstraction for irrigation. The effects of desiccation on the riverine ecosystem were evaluated using fish and macroinvertebrate assemblages according to the demands of the Water Framework Directive 2000/60/EC (WFD). Faunal responses to water stress were assessed through comparisons of assemblages attributes in perennial and intermittent reaches and pre-drought versus postdrought communities. Effects of hydrological disturbance on fish species richness, density, percentage composition and size structure were more pronounced in intermittent than in perennial sites. The most obvious and immediate impact was the elimination of populations in the intermittent reaches. However, upon flow resumption, the recolonisation from upstream perennial reaches began, thereby permitting partial re-establishment of the depleted fish communities. Nevertheless, the structural integrity of fish communities remained severely impacted and recovery was markedly slow. On the contrary, post-drought macroinvertebrate assemblages were not affected by summer droughts, and the recruitment processes were rapid after flow resumption. Our findings point to the necessity of establishing a distinction between naturally and artificially driven intermittent rivers. We, therefore, propose the introduction of an ''artificially intermittent Mediterranean river'' condition within the context of the WFD assessment applications.

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Section: Methodological Design and Data Collectionmentioning

confidence: 99%

Section: Impacts Of Water Stress On Biotamentioning

confidence: 99%

Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece

et al. 2011

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“…Also in Table 1 are given the respective median values from Greece Mainland Rivers (Skoulikidis et al 2006) for comparison. The latter values are representative of water quality in more 'pristine' environments, away from urban centres, however they belong in the same geological and climatic zone with respect to national spatial scale.…”

Section: Major Parameters Of Water Chemistrymentioning

confidence: 99%

“…When compared to the Nutrient Classification System developed by Skoulikidis et al (2006), most samples fall within the 'moderate' to 'bad' quality categories. Overall concentrations of the measured nutrients in the studied streams showed differences within the same sampling period (March-May 2012) (Figure 3).…”

Section: -mentioning

confidence: 99%

Comparative geochemistry of three urban streams in Athens: Kifissos-Podoniftis-Pikrodafni

et al. 2017

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The geochemistry of three urban streams in Athens was analysed and compared on the basis of major elements and heavy metals content in water and active sediment. The studied streams of Kifissos, Podoniftis and Pikrodafni run through the Athens basin of a total area of 540 km2 but differ with respect to the origin of their headwaters i.e., Parnitha, Penteli and Hymettus mountains. The main aim of the study was to determine the geochemical signature of water and sediment within the Athens hydrological basin and evaluate the effect of natural and anthropogenic environment on these water courses. A total of 56 stream water samples were obtained and analysed for major anions, cations and heavy metals (Mn, Cr, Cu, Zn, Pb) as well as nitrate and phosphate concentrations. Active stream sediments were collected at 22 locations along the streams and were analysed for heavy metals (Pb, Zn, Cu, Mn, Cr, Ni, Cd). Results indicated that rock weathering, rather than atmospheric or pollution influx is the dominant process affecting the major ion geochemistry of stream flow in the urban setting. However, Kifissos and Podoniftis waters had higher nitrate and phosphate concentrations indicating greater influence by anthropogenic activities. In general the quality characteristics of water and sediment in the study area were found to be in a good state regarding the studied parameters.

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“…In parts of Central and Northeastern Greece, catchment geology is dominated by silicate rocks (average 60%) followed by carbonate rocks (average 24%). The rivers in that areas have relatively low conductivity (average 297 mS.cm x1 ) and total hardness (average 172 mg.L x1 CaCO 3 ) while waters in western and southern basins are characterized by relatively higher levels of conductivity (average 428 mS.cm x1 ), total hardness (average 367 mg.L x1 CaCO 3 ) and alkalinity (average 3.41 mval.L x1 ) (Skoulikidis et al, 1998(Skoulikidis et al, , 2006. Due to the topography and geological history of Greece, endemism is particularly high in mainland Greece and its island complexes.…”

Section: Introductionmentioning

confidence: 99%

The Chironomidae (Diptera) fauna of Greece: ecological distributions and patterns, taxalist and new records

Płóciennik

Karaouzas

2014

Ann. Limnol. - Int. J. Lim.

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-For the first time, a faunistic list of the Chironomidae fauna of Greece is presented along with its ecological distribution. Chironomidae larvae and pupal exuviae were collected from 61 locations in mainland Greece during 2006-2008. 76 taxa (genera to species) were recorded. The genera Potthastia, Brillia, Euorthocladius, Synorthocladius, Tvetenia and Xenochironomus are recorded for the first time from Greece. Furthermore, 12 species are new for Greece and five are new for mainland Greece. Chironomidae collected from running waters were analysed with ordination techniques. The results revealed that Chironomidae assemblages were distinguished into three ecoregions with distinct climatic, geological and hydrochemical features. Running waters in Northwestern Greece were generally dominated by species tolerant to water acidification. Chironomids typical of eastern uplands preferred relatively slow current and soft bottom sediments. Assemblages of the southern Peloponnese Peninsula were represented by species of relatively fast flowing, warm streams. However, these are only preliminary results and many more data are needed to justify this ecological distinction of Chironomidae assemblages. This is the first study contributing to the knowledge of a rather neglected insect group of the Greek fauna. It is expected that more species remain to be identified and recorded and future works will contribute to this initial faunal list.

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Analysis of factors driving stream water composition and synthesis of management tools—A case study on small/medium Greek catchments

Cited by 111 publications

References 29 publications

Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece

Assessing water stress in Mediterranean lotic systems: insights from an artificially intermittent river in Greece

Comparative geochemistry of three urban streams in Athens: Kifissos-Podoniftis-Pikrodafni

The Chironomidae (Diptera) fauna of Greece: ecological distributions and patterns, taxalist and new records

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