Intracellular and dissolved microcystin in reservoirs of the river Segura basin, Murcia, SE Spain

Aboal, Marina; Puig, Mariàngels

doi:10.1016/j.toxicon.2004.12.012

Cited by 71 publications

(50 citation statements)

References 38 publications

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“…There have been few reports of microcystins in the Mediterranean region (Cook et al, 2004) and information about the prevalence of microcystin in Spanish reservoirs is particularly scarce (Barco et al, 2004;Quesada et al, 2004;Aboal & Puig, 2005). Our data, together with previously published data (Barco et al, 2004) obtained from another reservoir of the region, and from the Santillana reservoir (Gordo et al, 1999;Sanchis et al, 2002) indicate that potentially toxic cyanobacteria, cyanobacterial blooms and microcystins are common in the Madrid region.…”

Section: Discussionsupporting

confidence: 49%

“…e-mail: antonio.quesada@uam.es (Quesada et al, 2004). However, the prevalence of microcystin in Spanish waterbodies has been thoroughly investigated only recently (Bradt & Villena, 2001;Almodovar et al, 2004;Barco et al, 2004;Quesada et al, 2004;Aboal & Puig, 2005). Many Spanish reservoirs have elevated trophic levels (Avile´s & Gonza´lez, 1975;CEDEX, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Cyanobacterial abundance and microcystin occurrence in Mediterranean water reservoirs in Central Spain: microcystins in the Madrid area

Carrasco

Moreno

Sanchis

et al. 2006

European Journal of Phycology

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The occurrence and concentration of microcystins were analysed in sestonic samples from seven water reservoirs in the Madrid region (Spain) between July and November in two consecutive years (2002 and 2003). The data collected indicate that microcystins were present on several occasions in both years in all the reservoirs studied. The months of maximum risk for cyanotoxin occurrence were July, September and October, when Microcystis typically dominated the phytoplankton community. Four of the seven reservoirs exhibited conspicuous blooms, three of which were toxic. Of the samples in 2003, 45% and 70%, respectively, contained microcystins (Mc). In four of the reservoirs, microcystin concentrations were higher than the WHO recommended limit for drinking water (1 mg Mc l . From the data obtained we can conclude that M. aeruginosa is the main producer of microcystins in freshwaters from the Madrid region.

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Section: Discussionsupporting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Cyanobacterial abundance and microcystin occurrence in Mediterranean water reservoirs in Central Spain: microcystins in the Madrid area

Carrasco

Moreno

Sanchis

et al. 2006

European Journal of Phycology

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“…Nevertheless, recently, benthic cyanobacteria species of the genera Anabaena, Calothrix, Cyanothece, Nostoc, Oscillatoria and Phormidium, have been shown to produce toxins such as MCs, anatoxin and BMAA, and other cytotoxic and apoptosis-inducing compounds in several European estuarine systems, such as in France, Norway, Finland, Switzerland, Poland, Scotland and Portugal (Edwards et al, 1992;Mez et al, 1997;Vasconcelos & Cerqueira, 2001;Aboal & Puig, 2005;Herfindal et al, 2005;Surakka et al, 2005;Jonasson et al, 2008;Oftedal et al, 2010). Furthermore, the presence of anabaenopeptins A and D in a benthic brackish-water Nostoc isolate from an Atlantic estuary (Minho River, Portugal) has been reported by Lopes and co-workers (unpublished information).…”

Section: Further Cyanotoxinsmentioning

confidence: 99%

Planktonic and benthic cyanobacteria of European brackish waters: a perspective on estuaries and brackish seas

Lopes

Vasconcelos

2011

European Journal of Phycology

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Cyanobacteria are photosynthetic organisms found in aquatic and terrestrial biotopes and ecosystems throughout the world. Marine and freshwater cyanobacteria have been extensively studied due to the toxic hazards that some of them create and biotechnological interest. In contrast, the cyanobacteria of brackish waters have been less studied despite being able to form toxic blooms like their freshwater and marine counterparts. We review the occurrence, diversity and toxicity of cyanobacteria species in the brackish waters of Europe, mainly estuaries and brackish environments of the Atlantic Ocean and the Mediterranean and Baltic Seas. The dominant cyanobacteria belong mainly to the planktonic genera Nodularia, Aphanizomenon, Microcystis and Anabaena, but also the benthic forms of Anabaena and Phormidium. Most genera from brackish waters are reported to be hepatotoxin producers (microcystin and nodularin). However, anatoxin-a and other bioactive compounds (e.g. apoptogens) can also be found and are produced exclusively by benthic forms. Nodularin is the best-characterized brackish-water cyanotoxin, being primarily produced by N. spumigena. Data are presented on cyanotoxin production, accumulation, and potential food chain transfer, with a particular focus on nodularin, which induces multiple effects on food-chain dynamics. Microcystins and anatoxin-a are also considered. Potential risks to animals and humans from cyanotoxin exposure are discussed, although reports of animal poisoning by brackish-water toxic cyanobacteria are scarce and no cases of human intoxication are yet known.

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“…Numerous studies and investigations in specific lakes had examined the effects of various environmental factors (e.g. nutrients, light, and temperature) on microcystin production [23,24]. In addition to these, MC concentrations in water could vary substantially among reservoirs because of buoyancy and windblown cell accumulation along shorelines.…”

Section: Contents and Species Of Microcystin In Water Samplesmentioning

confidence: 99%

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

Dai

Liu

et al. 2008

Journal of Hazardous Materials

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The present study investigated the cyanobacteria and one family of their toxins-microcystins (MCs) in Guanting Reservoir of Beijing, China. The dominant species in the cyanobacteria found in August and September of 2006 was Microcystis, which accounted 99% of total algal cells. The specific species of the Microcystis in the cyanobacteria included Microcystis ichthyobalbe, Microcystis novacekii, Microcystis botrys and Microcystis aeruginosa which had different ratios in different sites. The qualitative analysis by HPLC showed that two microcystins were contained in cyanobacteria and one microcystin was in water of the reservoir. The major microcystins were microcystin-RR (MC-RR) and microcystin-LR (MC-LR), but only MC-LR was detected in water. The quantitative analysis by HPLC indicated that the maximum concentrations of MC-RR and MC-LR contained in cyanobacteria were 0.74 and 0.41 mg/g dry weight, respectively. The maximum microcystin concentration in water was 1.15 g/L and others were below 1 g/L.

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Intracellular and dissolved microcystin in reservoirs of the river Segura basin, Murcia, SE Spain

Cited by 71 publications

References 38 publications

Cyanobacterial abundance and microcystin occurrence in Mediterranean water reservoirs in Central Spain: microcystins in the Madrid area

Cyanobacterial abundance and microcystin occurrence in Mediterranean water reservoirs in Central Spain: microcystins in the Madrid area

Planktonic and benthic cyanobacteria of European brackish waters: a perspective on estuaries and brackish seas

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

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