Evaluation of the trophic state of Lake Pamvotis Greece, a shallow urban lake

Kagalou, Ifigenia; Papastergiadou, Eva; Tsimarakis, G.; Petridis, D.

doi:10.1023/b:hydr.0000008603.69847.9e

Cited by 34 publications

(30 citation statements)

References 5 publications

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“…Regarding at the two sampling stations the shallow S2 station, as expected, appeared relatively higher values than the deeper S1 station. The shallow lake Pamvotis has a long eutrophication history (Anagnostidis and Economou 1980;Albanis et al 1986;Stalikas et al 1994;Kagalou et al 2001Kagalou et al , 2003a due to the heavy point and non-point loading of nutrients, with cyanophyte blooms occurring since 1978 (Anagnostidis and Economou 1980). As reported by Kagalou et al (2003a,b) the in-lake nitrogen/ phosphorous concentrations ratio is less than the threshold of 10:1 which is considered as indicator for strong nitrogen-limiting conditions, thus favouring the Fig.…”

Section: Environmental Conditionsmentioning

confidence: 99%

“…In Lake Pamvotis a suitable combination of these factors for cyanobacteria growth is seen (Kagalou et al 2007). The fact that Lake Pamvotis has a polymictic regime, and is only weakly stratified from July to September (Romero et al 2002;Kagalou et al 2003a), prevents the continuous duration of cyanobacterial blooms through the whole year. Ecological studies of phytoplankton population in other Greek lakes have shown that prolonged cyanobacterial blooms occur which last up to 8-9 months (Moustaka-Gouni 1993; Tryfon et al 1994;Temponeras et al 2000;Mitraki et al 2004).…”

Section: Environmental Conditionsmentioning

confidence: 99%

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Assessment of microcystins in lake water and the omnivorous fish (Carassius gibelio, Bloch) in Lake Pamvotis (Greece) containing dense cyanobacterial bloom

Kagalou

Papadimitriou

Bacopoulos

et al. 2007

Environ Monit Assess

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Toxin-producing cyanobacteria in lakes and reservoirs form a threat to humans as well as various forms of aquatic life. This study examined the occurrence and distribution of Microcystins (MCYST) in the shallow eutrophic lake Pamvotis (Greece). MCYST concentrations in the tissues (liver, kidneys, intestine, gonads, brain and muscle) of the fish species Carassius gibelio were also examined. Tests were performed with an enzyme-linked immunosorbent assay (ELISA). MCYST concentration in water and in the scum of Lake Pamvotis were highest during the warm period (April-October, 2005). Phytoplankton samples were dominated by the genera Microcystis and Anabaena during the same period. MCYST values were always below the WHO Guide level for recreational waters but much higher than the WHO Guide level for drinking water. It was found that MCYST can accumulate in the fish tissues of C. gibelio. Even though the target organ for MCYST is the liver, in our study MCYST were found also in the rest of C. gibelio tissues in the following order: intestine> kidney> > brain>gonads> muscle. Muscle tissue contained concentrations of microcystins that correspond to 0.096 microg/kg/day well above the recommended limit for human consumption (0.04 microg/Kg/day).

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Section: Environmental Conditionsmentioning

confidence: 99%

Section: Environmental Conditionsmentioning

confidence: 99%

Assessment of microcystins in lake water and the omnivorous fish (Carassius gibelio, Bloch) in Lake Pamvotis (Greece) containing dense cyanobacterial bloom

Kagalou

Papadimitriou

Bacopoulos

et al. 2007

Environ Monit Assess

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“…The changes in δ 15 N values indicate that sources of dissolved inorganic nitrogen (DIN) changed during the last centuries in both lakes. The considerable increase in δ 15 N values in Lake Pamvotis could be attributed to release of soil nitrogen (ROUTH et al, 2007), as well as agricultural runoff and sewage input from the city of Ioannina that stopped in the 1990s (KAGALOU et al, 2003). In contrast, the decrease in δ 15 N values in Lake Bohinj shows a similar trend as observed in other lakes in the area of Triglav National Park (e.g.…”

Section: Analysesmentioning

confidence: 71%

“…In contrast, at B1 the deeper water column depth (i.e., 40 m) would favour a longer sinking time, and thus higher degradation of sinking organic matter. The increasing C org and N content with time in both lakes is most probably a result of progressive nutrient enrichment and also the eutrophication process caused by changes in the past trophic state, inferred by natural development of the lake ecosystems (VRE~A & MURI, 2006), as well as human activities that were intense, especially in the surroundings of Lake Pamvotis (KAGALOU et al, 2003, LAWSON et al, 2004.…”

Section: Analysesmentioning

confidence: 98%

“…Location map of Ioannina and Lake Pamvotis from the lake along with industrial discharges on the southern shoreline. Biological analyses in lake Pamvotis showed that chlorophytes and diatoms are the most abundant algae, while among zooplankton copepods, cladoserans and rotifers prevail (ROMERO et al, 2002, KAGALOU et al, 2003. Heavy surface blooms of planctonic cyanobacteria were also observed (KAGALOU et al, 2008).…”

Section: Study Sitementioning

confidence: 99%

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C and N elemental and stable isotopic signatures in sedimentary organic matter from Lake Pamvotis (Greece)

Vreča¹,

Stalikas²,

Muri³

et al. 2008

Geologija

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Organic carbon (C org ) and total nitrogen (N) concentrations in combination with stable organic carbon (δ 13 C org ) and nitrogen (δ 15 N) isotopic composition were used to investigate the organic matter sources and influence of anthropogenic activities on recent sediments of eutrophic Lake Pamvotis (Greece) and oligotrophic Lake Bohinj (Slovenia). C org and N concentrations increase upcore showing a progressive nutrient enrichment in both lakes. The C/N ratios vary with depth and indicate that allochthonous and autochthonous sources contributed to sedimentary organic matter. Nevertheless, an excursion to relatively low surface sediment C/N ratios suggests that recently the latter predominates. Finally, δ 13 C org and δ 15 N records showed changes in carbon and nitrogen cycles related predominantly to local anthropogenic activities in Lake Pamvotis and to anthropogenic activities (i.e. woodcutting) and global atmospheric changes in Lake Bohinj. Izvle~ekNa osnovi dolo~itev koncentracij organskega ogljika (C org ) in celotnega du{ika (N) ter njune izotopske sestave (δ 13 C org , δ 15 N) smo raziskali izvore organske snovi in vpliv antropogenih aktivnosti na recentne sedimente evtrofnega jezera Pamvotis (Gr~ija) in oligotrofnega Bohinjskega jezera (Slovenija). Koncentracije C org in N, ki nara{~ajo proti povr{ini sedimenta v obeh jezerih, nakazujejo postopno pove~anje vnosa hranil. Razmerje C/N se z globino spreminja ter nakazuje spreminjanje deleža alohtone in avtohtone komponente v sedimentirani organski snovi, vendar relativno nizka razmerja C/N v povr{inskem sedimentu nakazujejo na pove~an vpliv avtohtone komponente. Spreminjanje δ 13 C org in δ 15 N z globino nakazuje spremembe v kroženju ogljika in du{ika, ki so v jezeru Pamvotis predvsem posledica lokalnih antropogenih dejavnosti, v Bohinjskem jezeru pa jih lahko pripi{emo antropogenim vplivom (sekanje gozdov) in globalnim vplivom preko atmosfere.

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Seasonally Accumulation of Microcystins in the Various Tissues of an Endemic and Protected Fish Species (Rutilus panosi) with Different Sizes

Papadimitriou

Kagalou

Leonardos

2012

CLEAN Soil Air Water

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The present study was undertaken to investigate the accumulation of microcystins (MCYST) in the various tissues of an endemic and protected fish species (Rutilus panosi). We also tried to identify any differences in sensitivity and accumulation of MCYST, for various specimens of the same fish species related to body length. MCYST concentrations in lake water and fish tissues were determined by a commercial Microcystin ELISA kit. Results showed that considerable amount of toxins were found to be accumulated in tissues of R. panosi throughout the year. Among them, liver had the highest MCYST concentrations (407.97 ± 32.43 ng/g). This study confirmed the accumulation of high MCYST concentrations in fish brain (308.75 ± 26.49 ng/g). Our results suggest, that MCYST accumulation in R. panosi tissues is size depended. High MCYST concentration in the muscle of the fish increases the risk of unsafe consumption, thus threatening human health.

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Evaluation of the trophic state of Lake Pamvotis Greece, a shallow urban lake

Cited by 34 publications

References 5 publications

Assessment of microcystins in lake water and the omnivorous fish (Carassius gibelio, Bloch) in Lake Pamvotis (Greece) containing dense cyanobacterial bloom

Assessment of microcystins in lake water and the omnivorous fish (Carassius gibelio, Bloch) in Lake Pamvotis (Greece) containing dense cyanobacterial bloom

C and N elemental and stable isotopic signatures in sedimentary organic matter from Lake Pamvotis (Greece)

Seasonally Accumulation of Microcystins in the Various Tissues of an Endemic and Protected Fish Species (Rutilus panosi) with Different Sizes

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