Tracing calcite precipitation with specific conductance in a hard water alpine lake (Lake Bourget)

Groleau, Alexis; Sarazin, Gérard; Vinçon‐Leite, Brigitte; Tassin, Bruno; Quiblier-Llobéras, Catherine

doi:10.1016/s0043-1354(00)00191-3

Cited by 26 publications

(17 citation statements)

References 22 publications

(28 reference statements)

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“…The survey (including microscopic counting) started in September 1999, after a bloom of Planktothrix rubescens had been detected in Lake Bourget, the largest natural lake in France (for a physical description, see Groleau et al 2000). The outbreak of the bloom became evident when dead filaments of P. rubescens appeared at the outlet from a drinking water plant that processes lake water pumped from a depth of 30 m. From September 2000, the FluoroProbe (see below) was used for depth profiling once or twice a month, from the surface down to 45 m (which is well below the photic layer), in addition to discrete water sampling for the purposes of cell counting and identification.…”

Section: Methodsmentioning

confidence: 99%

Application of a submersible spectrofluorometer for rapid monitoring of freshwater cyanobacterial blooms: a case study

Leboulanger¹,

Dorigo²,

Jacquet³

et al. 2002

Aquat. Microb. Ecol.

121

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A recently available submersible fluorescent probe was configured and used to survey the vertical distribution of the deep-living toxic and filamentous cyanobacterium Planktothrix (Oscillatoria) rubescens among the autochthonous algal communities in Lake Bourget, France. This in situ measuring spectrofluorometer, which can be used to perform chlorophyll analysis and integrated algal class determination, provides a realistic estimation of the abundance and dynamics of the cyanobacterial population that is known to produce the hepatotoxic heptapeptides microcystin RR and LR. Data provided from in-line measurements using the probe and from P. rubescens cell counts obtained by discrete sampling were closely correlated (r = 0.899, p < 0.01), as were in-line data and spectrophotometric total chlorophyll a measurements (r = 0.775, p < 0.01). A survey conducted from December 1999 to May 2001 revealed that P. rubescens exhibits a deep maximum level (typically between 10 and 15 m) in spring and summer (reaching concentrations of up to 20 µg equivalent chl a l -1 , i.e. 27 000 cells ml -1 ), whereas it spreads from the surface either to the top of the thermocline or to the bottom of the lake, in autumn and winter respectively. We propose that the probe could be used as a powerful tool for assaying the occurrence and dynamics of microalgal blooms, typically toxic cyanobacteria, that call for accurate and rapid monitoring to assess the health of the ecosystem and to alert the authorities about potential risks regarding pumping and use of the lake water for drinking-water production purposes.KEY WORDS: Cyanobacteria · Fluorescence · Bloom · Monitoring · Water supply Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 30: [83][84][85][86][87][88][89] 2002 the organisations that are responsible for these surveys. Hence it is of crucial importance to develop tools to make it possible to carry out rapid and reliable screening for potential contaminants in water. Molecular fingerprinting is often proposed as an alternative method for identifying potentially toxic species, but it involves delay, and still calls for discrete sampling of water and skilled personnel to perform the analysis. Consequently, any system that can cope with the constraints associated with water monitoring, such as immediacy of response, low maintenance costs, specificity, sensitivity, ease of handling, and rapidity of interpretation, is bound to be of interest. The in vivo auto-fluorescence characteristic of pigment-containing microorganisms, such as cyanobacteria and microalgae, has long been envisaged as a potential diagnostic signal (e.g. Yentsch & Yentsch 1979, Yentsch & Phinney 1985, provided that differences in pigment compositions among these phytoplankters lead to differences in fluorescence patterns. A new multi-wavelength submersible probe (FluoroProbe, bbe-Moldaenke) has recently been made available to scientists (Beutler et al. 2002). We used this tool, after simple reconfiguration, to mon...

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Section: Methodsmentioning

confidence: 99%

Application of a submersible spectrofluorometer for rapid monitoring of freshwater cyanobacterial blooms: a case study

Leboulanger¹,

Dorigo²,

Jacquet³

et al. 2002

Aquat. Microb. Ecol.

121

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“…During warm seasons we observed a strong decrease in Ca 2+ concentrations in the epilimnion along with an increase of CaCO 3 flux to the sediment (r=-0.58, P=0.01). This suggests that the development of phytoplankton and photosynthetic activity together with rapidly increasing temperatures in the epilimnion affect carbonate oversaturation by decreasing CO 2 (aq), increasing pH, and favouring calcite precipitation (Kelts and Hsü, 1978;Groleau et al, 2000). Calcite has clearly the most important contribution to the total sediment mass flux.…”

Section: Annual Variability Of Sediment Depositionmentioning

confidence: 99%

Modern limnology, sediment accumulation and varve formation processes in Lake Żabińskie, northeastern Poland: comprehensive process studies as a key to understand the sediment record

et al. 2014

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“…Furthermore, Lake Bourget is one of the most regularly monitored lakes in France; research projects concerning its main functioning features have been conducted for many years (e.g. Groleau et al 2000;Dorigo et al 2006;Vinçon-Leite et al 2002).…”

Section: Study Sitementioning

confidence: 99%

High-frequency monitoring of phytoplankton dynamics within the European water framework directive: application to metalimnetic cyanobacteria

Vinçon‐Leite

Lemaire

et al. 2010

Biogeochemistry

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Large, sub-alpine, stratified lakes are directly within the scope of the European Water Framework Directive (WFD) and need adapted monitoring systems. Moreover, anthropogenic eutrophication was frequently the main cause of their water quality degradation in the 20th century. This paper is primarily aimed at demonstrating how in situ sensor-equipped buoys could be the base of monitoring designs to support the WFD objectives. The core of this paper, mainly methodological, focuses on single-depth, high frequency (4 per hour) fluorescence measurements. It shows that the internal wave pattern provides additional information to the singledepth time series to assess phytoplankton dynamics in a stratified water column displaying strong, vertical biomass heterogeneity. The paper deals with the following three aspects: (1) definition of an indicator to determine whether or not the sensor actually

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Tracing calcite precipitation with specific conductance in a hard water alpine lake (Lake Bourget)

Cited by 26 publications

References 22 publications

Application of a submersible spectrofluorometer for rapid monitoring of freshwater cyanobacterial blooms: a case study

Application of a submersible spectrofluorometer for rapid monitoring of freshwater cyanobacterial blooms: a case study

Modern limnology, sediment accumulation and varve formation processes in Lake Żabińskie, northeastern Poland: comprehensive process studies as a key to understand the sediment record

High-frequency monitoring of phytoplankton dynamics within the European water framework directive: application to metalimnetic cyanobacteria

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