Measurement of phycocyanin fluorescenceas an online early warning system for cyanobacteria in reservoir intake water

Izydorczyk, Katarzyna; Tarczynska, M.; Jurczak, Tomasz; Mrówczyński, Jarosław; Zalewski, Maciej

doi:10.1002/tox.20128

Cited by 99 publications

(62 citation statements)

References 28 publications

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“…This suggests that short-term measurements of antenna pigments may not reflect the overall behaviour of cyanobacterial colonies, particularly if blooms are collapsing from human intervention or natural means. This is an important consideration for water managers, as many technologies for determining algal biomass using chl a and phycocyanin fluorescence are currently being developed and commercialized (see for example Gregor and Marsalek, 2004;Izydorczyk et al, 2005;Richardson et al, 2010). In the field experiment, cyanobacteria at the pond outlet decreased significantly in the week following H 2 O 2 treatment, and then exhibited exponential growth (ANOVA, P < 0.01) for the final three weeks of the monitoring period (Fig.…”

Section: Cyanobacterial Dynamicsmentioning

confidence: 99%

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Barrington

Ghadouani

Ivey

2013

Hydrol. Earth Syst. Sci.

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Abstract. Cyanobacteria and cyanotoxins are a risk to human and ecological health, and a hindrance to biological wastewater treatment. This study investigated the use of hydrogen peroxide (H 2 O 2 ) for the removal of cyanobacteria and cyanotoxins from within waste stabilization ponds (WSPs). The daily dynamics of cyanobacteria and microcystins (commonly occurring cyanotoxins) were examined following the addition of H 2 O 2 to wastewater within both the laboratory and at the full scale within a maturation WSP, the final pond in a wastewater treatment plant. Hydrogen peroxide treatment at concentrations ≥ 0.1 mg H 2 O 2 µg −1 total phytoplankton chlorophyll a led to the lysis of cyanobacteria, in turn releasing intracellular microcystins to the dissolved state. In the full-scale trial, dissolved microcystins were then degraded to negligible concentrations by H 2 O 2 and environmental processes within five days. A shift in the phytoplankton assemblage towards beneficial Chlorophyta species was also observed within days of H 2 O 2 addition. However, within weeks, the Chlorophyta population was significantly reduced by the re-establishment of toxic cyanobacterial species. This re-establishment was likely due to the inflow of cyanobacteria from ponds earlier in the treatment train, suggesting that whilst H 2 O 2 may be a suitable short-term management technique, it must be coupled with control over inflows if it is to improve WSP performance in the longer term.

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Section: Cyanobacterial Dynamicsmentioning

confidence: 99%

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Barrington

Ghadouani

Ivey

2013

Hydrol. Earth Syst. Sci.

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“…O estudo realizado confirma o potencial de detecção de cianobactérias por meio da fluorescência in vivo, apontado por Bastien et al (2011), Brient et al (2008 e Izydorczyk et al (2005), entre outros, e indica que esse tipo de abordagem pode constituir-se em um mecanismo eficiente de alerta de cianobactérias em estágio inicial de florescimento.…”

Section: Methodsunclassified

Mapeamento de cianobactérias por meio da fluorescência da ficocianina e de análise geoestatística

Utsumi

Galo

Tachibana

2015

Rev. bras. eng. agríc. ambient.

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R E S U M OO florescimento de cianobactérias em águas continentais é um problema mundial que deve ser monitorado pelo potencial risco que representa à saúde humana. O objetivo deste estudo foi mapear a ocorrência de cianobactérias por meio da integração de medidas de fluorescência in vivo do pigmento ficocianina e da análise geoestatística. Os dados fluorimétricos foram coletados em 59 pontos de amostragem georreferenciados no reservatório de Nova Avanhandava, São Paulo, em dezembro de 2011. Analisaramse, para caracterização do ambiente aquático, parâmetros limnológicos da água além da identificação dos grupos fitoplanctônicos constatando-se a presença de gêneros tóxicos de cianobactérias. Os valores de concentração de ficocianina variaram entre 1 a 10 μg L -1 , sinalizando o potencial do método em detectar cianobactérias, mesmo em estágio inicial de florescimento. A análise geoestatística permitiu detectar a anisotropia dos dados de concentração de ficocianina, de modo que o modelo esférico se ajustou melhor para realizar a krigagem ordinária. A validação do modelo resultou em um erro médio quadrático de 0,98, além de permitir modelar a incerteza associada à inferência.Mapping of cyanobacteria using phycocyanin fluorescence and geostatistical analysis A B S T R A C T Bloom of cyanobacteria in continental waters is a worldwide problem that should be monitored by the potential risk posed to human health. This study aimed to map the occurrence of cyanobacteria through integration of fluorimetric in vivo phycocyanin pigment method and geostatistical analysis. Fluorimetric data were collected from 59 georeferenced sampling points in New Avanhandava reservoir, São Paulo, in December 2011. In order to characterize aquatic environment, limnological parameters were analysed. Besides, phytoplankton groups identification were performed, noting the presence of toxic cyanobacterial genera. Values of phycocyanin concentration ranged between 1 to 10 mg L -1 , indicating the potential of the method for cyanobacteria detection, even in early stages of bloom. Geostatistical analysis allowed detecting phycocyanin concentration anisotropy, which adjusted better in spherical model to perform ordinary kriging. Model validation resulted in Root Mean Square equal to 0.98, besides allows modeling the inference uncertainty.Palavras-chave: fluorescência in vivo grupos fitoplanctônicos krigagem ordinária Key words: in vivo fluorescence phytoplankton groups ordinary kriging

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“…The Sulejów Reservoir suffers from significant eutrophication due to the supply of nutrient compounds from both point and nonpoint (diffuse) sources. A particularly difficult problem for water managers has been the massive blooms of toxic algae (specifically cyanobacteria) which often occur in the summer (Tarczyńska et al 2001, Izydorczyk et al 2005.…”

Section: Methodsmentioning

confidence: 99%

Gis Approach to Estimation of the Total Phosphorous Transfer in the Pilica River Lowland Catchment

Magnuszewski

Kiedrzyńska

Kiedrzyński

et al. 2014

Quaestiones Geographicae

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In this paper, the Pilica River catchment (central Poland) is analyzed with a focus on understanding the total phosphorous transfer along the river system which also contains the large artificial Sulejów Reservoir. The paper presents a GIS method for estimating the total phosphorous (TP) load from proxy data representing sub-catchment land use and census data. The modelled load of TP is compared to the actual transfer of TP in the Pilica River system. The results shows that the metrics of connectivity between river system and dwelling areas as well as settlement density in the sub-catchments are useful predictors of the total phosphorous load. The presence of a large reservoir in the middle course of the river can disrupt nutrient transport along a river continuum by trapping and retaining suspended sediment and its associated TP load. Analysis of the indirect estimation of TP loads with the GIS analysis can be useful for identifying beneficial reservoir locations in a catchment. The study has shown that the Sulejów Reservoir has been located in a subcatchment with a largest load of the TP, and this feature helps determine the problem of reservoir eutrphication.key worDs: total phosphorus load, Pilica River catchment, GIS, central Poland.

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Measurement of phycocyanin fluorescenceas an online early warning system for cyanobacteria in reservoir intake water

Cited by 99 publications

References 28 publications

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Mapeamento de cianobactérias por meio da fluorescência da ficocianina e de análise geoestatística

Gis Approach to Estimation of the Total Phosphorous Transfer in the Pilica River Lowland Catchment

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