Evaluating the potential risk of microcystins to blue crab (Callinectes sapidus) fisheries and human health in a eutrophic estuary

Garcia, Ana Cristina de Almeida; Bargu, Sibel; Dash, Padmanava; Rabalais, Nancy N.; Sutor, Malinda; Morrison, Wendy; Walker, Nan D.

doi:10.1016/j.hal.2009.08.011

Cited by 61 publications

(42 citation statements)

References 42 publications

(46 reference statements)

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“…Fish viscera and the hepatopancreas of shellfish and mollusks usually contained higher levels than edible parts [71]. Significant levels of MCs have also been found in the tissues of the demersal blue crab Callinectes sapidus (up to 820, 65 and 105 μg MC/kg in hepatopancreas, viscera and muscle, respectively), during a bloom of toxic cyanobacteria in the hypereutrophic Lac des Allemands, that is the end-member of the Barataria estuary (Luoisiana) [72].…”

Section: Fish Shellfish and Molluscsmentioning

confidence: 99%

Emerging health issues of cyanobacterial blooms

Manganelli

Scardala

Stefanelli

et al. 2012

Annali Dell'Istituto Superiore Di Sanità

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Abstract. This paper describes emerging issue related to cyanobacterial dynamics and toxicity and human health risks. Data show an increasing cyanobacteria expansion and dominance in many environments. However there are still few information on the toxic species fitness, or on the effects of specific drivers on toxin production. Open research fields are related to new exposure scenario (cyanotoxins in water used for haemodialysis and in food supplements); to new patterns of co-exposure between cyanotoxins and algal toxins and/or anthropogenic chemicals; to dynamics affecting toxicity and production of different cyanotoxin variants under environmental stress; to the accumulation of cyanotoxins in the food web. In addition, many data gaps exist in the characterization of the toxicological profiles, especially about long term effects.

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Section: Fish Shellfish and Molluscsmentioning

confidence: 99%

Emerging health issues of cyanobacterial blooms

Manganelli

Scardala

Stefanelli

et al. 2012

Annali Dell'Istituto Superiore Di Sanità

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“…This increase can be both natural and human induced (Moss 1988;Wetzel 2001). Various studies have already addressed the problems related to aquatic system eutrophication which impairs its ability to supply both human needs and maintenance of aquatic life (Espíndola et al, 2000;Sampaio et al, 2002;Sotero-Santos et al, 2008;Garcia et al, 2010). Moreover, this phenomenon can cause major functional and compositional shifts in ecosystems (Scheffer et al, 2001;Schindler, 2006) and the increase in diseases in humans and wildlife (Johnson et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Water quality changes in floodplain lakes due to the Amazon River flood pulse: Lago Grande de Curuaí (Pará)

Affonso¹,

Barbosa²,

Novo³

2011

Braz. J. Biol.

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Assurance of water quality for human consumption is essential for public health policies. In the Amazon floodplain, the seasonal water level variation causes periodic flooding of marginal areas that are usually used for settlements, agriculture and livestock. Therefore, the exchange of materials between the terrestrial and aquatic ecosystem affects the proportion of suspended and dissolved components in water and its physical-chemical characteristics, and consequently the quality of the water used by local people. Following this approach, the aim of this study is to evaluate changes in water quality in Lago Grande de Curuaí floodplain, Óbidos, Pará in response to the flood pulse, during one hydrological year from 2003 to 2004, based on water use classes (according to National Water Agency 357/2005 resolution) using chlorophyll-a and dissolved oxygen concentration as parameters and the eutrophication index. Ordinary kriging was applied to interpolate chlorophyll-a and dissolved oxygen and to predict values at non sampled locations. Each location was then classified according to water use acceptable parameters and to Carlson Trophic State Index modified by Toledo to map lake water classes and trophic status. The result showed that Lago Grande de Curuaí floodplain is a supereutrophic system, with levels of dissolved oxygen and chlorophyll-a not suitable for human supply during the receding water phase. These areas are located near the riverine communities, which can cause health problems due to the presence of potentially toxic algae. Therefore, monitoring water quality in Amazon lakes is essential to ensure the availability has appropriate quality for human and animal supplies.Keywords: Amazon várzea, chlorophyll-a, dissolved oxygen, eutrophication index, seasonality.Mudanças na qualidade da água nos lagos de planície de inundação em função do pulso de inundação do rio Amazonas: lago Grande de Curuaí, Pará ResumoA garantia da qualidade da água para consumo humano é essencial para as políticas de saúde pública. Na planície Amazônica a variação sazonal do nível de água provoca inundações periódicas das áreas marginais que são normalmente utilizadas para os assentamentos humanos, a agricultura e a pecuária. Portanto, a troca de materiais entre os ecossistemas terrestres e aquáticos afeta a proporção de componentes em suspensão e dissolvidos na água e suas características físico-químicas, o que, consequentemente, afeta a qualidade da água utilizada pela população local. Seguindo essa abordagem, o objetivo deste trabalho é avaliar as mudanças na qualidade da água na planície de inundação do lago Grande de Curuaí, Óbidos, Pará, em função do pulso de inundação, durante um ano hidrológico de 2003 a 2004, tendo por base tanto as classes de uso da água (de acordo com a Resolução nº 357/2005 da Agência Nacional de Água), usando como parâmetros tanto a concentração de clorofila-a e o oxigênio dissolvido, quanto o índice de eutrofização. Utilizou-se o método de krigagem para interpolar os dados de clorofila-a e de oxig...

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“…However, use of satellite remote sensing for monitoring small lakes and estuaries is a challenge due to the optical complexities of these Case 2 water bodies leading to atmospheric correction problems (-Case 1‖ and -Case 2‖ defined in Morel and Prieur [2]). One such small lake is Lac des Allemands in Louisiana, USA, where high concentrations of cyanobacteria are known to occur in spring and summer [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Correction and Vicarious Calibration of Oceansat-1 Ocean Color Monitor (OCM) Data in Coastal Case 2 Waters

et al. 2012

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Abstract:The Ocean Color Monitor (OCM) provides radiance measurements in eight visible and near-infrared bands, similar to the Sea-viewing Wide Field-of-View Sensor (SeaWiFS) but with higher spatial resolution. For small-to moderate-sized coastal lakes and estuaries, where the 1 × 1 km spatial resolution of SeaWiFS is inadequate, the OCM provides a good alternative because of its higher spatial resolution (240 × 360 m) and an exact repeat coverage of every two days. This paper describes a detailed step-by-step atmospheric correction procedure for OCM data applicable to coastal Case 2 waters. This development was necessary as accurate results could not be obtained for our Case 2 water study area in coastal Louisiana with OCM data by using existing atmospheric correction software packages. In addition, since OCM-retrieved radiances were abnormally low in the blue wavelength region, a vicarious calibration procedure was developed. The results of our combined vicarious calibration and atmospheric correction procedure for OCM data were compared with the results from the SeaWiFS Data Analysis System (SeaDAS) software package outputs for SeaWiFS and OCM data. For Case 1 waters, our results matched closely with SeaDAS results. For Case 2 waters, our results demonstrated closure with in situ radiometric measurements, while SeaDAS produced negative normalized water leaving radiance ( n L w ) and remote sensing reflectance (R rs ). In summary, our procedure OPEN ACCESSRemote Sens. 2012, 4 1717 resulted in valid n L w and R rs values for Case 2 waters using OCM data, providing a reliable method for retrieving useful n L w and R rs values which can be used to develop ocean color algorithms for in-water substances (e.g., pigments, suspended sediments, chromophoric dissolved organic matter, etc.) at relatively high spatial resolution in regions where other software packages and sensors such as SeaWiFS and Moderate Resolution Imaging Spectrometer (MODIS) have proven unsuccessful. The method described here can be applied to other sensors such as OCM-2 or other Case 2 water areas.

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Evaluating the potential risk of microcystins to blue crab (Callinectes sapidus) fisheries and human health in a eutrophic estuary

Cited by 61 publications

References 42 publications

Emerging health issues of cyanobacterial blooms

Emerging health issues of cyanobacterial blooms

Water quality changes in floodplain lakes due to the Amazon River flood pulse: Lago Grande de Curuaí (Pará)

Atmospheric Correction and Vicarious Calibration of Oceansat-1 Ocean Color Monitor (OCM) Data in Coastal Case 2 Waters

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