Project

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Metal Bioavailability to Aquatic Photosynthetic Organisms in Changing Environment (BioChEn)

English title Metal Bioavailability to Aquatic Photosynthetic Organisms in Changing Environment (BioChEn)
Applicant Slaveykova-Startcheva Vera
Number 134627
Funding scheme Project funding (Div. I-III)
Research institution Institut F.-A. Forel Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Other disciplines of Environmental Sciences
Start/End 01.09.2011 - 31.12.2014
Approved amount 190'762.00
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All Disciplines (2)

Discipline
Other disciplines of Environmental Sciences
Other disciplines of Earth Sciences

Keywords (6)

metal speciation dynamics; bioavailability; toxicity; solar radiation; combined stress; dissolved organic matter

Lay Summary (English)

Lead
Lay summary

The interactions of climate variability and the changes in the surface radiation are anticipated to affect the aquatic biogeochemical cycles and thus to increase the uncertainty in predicting environmental risks associated with chemical pollution. Therefore the understanding of the processes that govern the contaminant (e.g. toxic metal) interactions with different biotic and abiotic components in changing environment is of crucial importance for development of the predictive models for environmental risk assessment and sustainable water quality in 21st century. The present project address the major question of how the interacting effects of toxic metals, increased solar radiation and natural organic matter (NOM) alterations will impact the photosynthetic organisms in surface waters. The photosynthetic organisms, phytoplankton and macrophytes,  are major players in the surface water primary productivity and represent the basis of the aquatic food chain. The following key questions will be addressed: (i) To what extent increased solar radiation affect the speciation of metal - NOM complexes?; (ii) How does the combination of enhanced solar radiation and NOM - alteration affect metal bioavailability?; (iii) What would be consequences for the photosynthetic organisms in the surface waters? The project outcomes are expected to contribute significantly in the filling of the existing gaps in the knowledge and reducing the uncertainty, concerning the combined action of chemical and other environmental stressors on the two major groups of the aquatic primary producers.

Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Species-species interactions modulate copper toxicity under different visible light conditions
Cheloni Giulia, Gagnaux Valérie, Slaveykova Vera I. (2019), Species-species interactions modulate copper toxicity under different visible light conditions, in Ecotoxicology and Environmental Safety, 170, 771-777.
Interactive effects of copper oxide nanoparticles and light to green alga Chlamydomonas reinhardtii
Cheloni G, Marti E, Slaveykova V.I. (2016), Interactive effects of copper oxide nanoparticles and light to green alga Chlamydomonas reinhardtii, in Aquatic Toxicology, 170, 120-128.
Effects of copper-oxide nanoparticles, dissolved copper and ultraviolet radiation on copper bioaccumulation, photosynthesis and oxidative stress in the aquatic macrophyte Elodea nuttallii
Regier Nicole, Cosio Claudia, Von Moos Nadia, Slaveykova Vera (2015), Effects of copper-oxide nanoparticles, dissolved copper and ultraviolet radiation on copper bioaccumulation, photosynthesis and oxidative stress in the aquatic macrophyte Elodea nuttallii, in Chemisphere, 128, 56-61.
Lead bioavailability to freshwater microalgae in the presence of dissolved organic matter: contrasting effect of model humic substances and marsh water fractions obtained by ultrafiltration
Worms Isabelle A.M., Slaveykova Vera I., Wilksinson Kevin J. (2015), Lead bioavailability to freshwater microalgae in the presence of dissolved organic matter: contrasting effect of model humic substances and marsh water fractions obtained by ultrafiltration, in Aquatic geochemistry, 21, 217-230.
Photo-transformation of pedogenic humic acid and consequences for Cd(II), Cu(II) and Pb(II) speciation and bioavailability to green microalga
Worms Isabelle AM, Adenmatten David, Miéville Pascal, Traber Jacqueline, Slaveykova Vera (2015), Photo-transformation of pedogenic humic acid and consequences for Cd(II), Cu(II) and Pb(II) speciation and bioavailability to green microalga, in Chemosphere, 138, 908-915.
Antagonistic and synergistic effects of light irradiation on the effects of copper on Chlamydomonas reinhardtii
Cheloni Giulia, Cosio Claudia, Slaveykova Vera (2014), Antagonistic and synergistic effects of light irradiation on the effects of copper on Chlamydomonas reinhardtii, in Aquatic toxicology, 155, 275-282.
Optimization of the C11-BODIPY581/591 Dye for the Determination of Lipid Oxidation in Chlamydomonas reinhardtii by Flow Cytometry
CHELONI Giulia (2013), Optimization of the C11-BODIPY581/591 Dye for the Determination of Lipid Oxidation in Chlamydomonas reinhardtii by Flow Cytometry, in Cytometry A , 83(10), 952-961.
The Environmental Significance of Natural Nanoparticles
Adam Hartland, Jamie R. Lead, Vera I. Slaveykova, Denis O'Carroll, Eugenia Valsami-Jones (2013), The Environmental Significance of Natural Nanoparticles, in Nature Education Knowledge , 4(8), 7.
Trace metal behavior in surface waters : emphasis on dynamic speciation, sorption processes and bioavailability
Tercier-Waeber Mary-Lou, Stoll Serge, Slaveykova Vera (2013), Trace metal behavior in surface waters : emphasis on dynamic speciation, sorption processes and bioavailability, in Archives des sciences, 65, 119-142.
Effects of extraction methods on the composition and molar mass distributions of exopolymeric substances of the bacterium Sinorhizobium meliloti
Alasonati Enrica, Slaveykova Vera (2012), Effects of extraction methods on the composition and molar mass distributions of exopolymeric substances of the bacterium Sinorhizobium meliloti, in Bioresourse Technology , 114, 603-609.

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
24th Annual Meeting SETAC Europe, Basel Poster Combined effects of copper and UVB radiation in single and multi-species algal assays 11.05.2014 Basel, Switzerland Slaveykova-Startcheva Vera; Cheloni Giulia;
VI All-Russian Congress of young biologists “SymBoSE-Russia-2013” Talk given at a conference Interactions of vital and toxic elements with biotic and abiotic components in the aquatic systems 19.08.2013 Irkutsk, Russia, Russia Slaveykova-Startcheva Vera;
16th International Symposium on Field- and Flow-based Separations Talk given at a conference Environmental flow field-flow fractionation coupled to ICP-MS for probing bioavailability potential of metal containing contaminants 30.06.2013 Pau, france, France Slaveykova-Startcheva Vera;
SENSE research school Speciation and bioavailability Talk given at a conference Copper speciation and bioavailability to microalgae under realistic light conditions 07.06.2013 University of Wageningen, The Netherlands, Netherlands Cheloni Giulia;
23th Annual Meeting SETAC Europe Poster Understanding the role of DOM on metal bioavailability - a prerequisite for the narrowing the gap in lab-to-field extrapolation 12.05.2013 Glasgow, Great Britain and Northern Ireland Cosio Claudia; Cheloni Giulia; Slaveykova-Startcheva Vera;
23th Annual Meeting SETAC Europe Talk given at a conference Combined exposure of Chlamydomonas reinhardtii to copper and solar-simulated radiation 12.05.2013 Glasgow, UK, Great Britain and Northern Ireland Cosio Claudia; Slaveykova-Startcheva Vera; Cheloni Giulia;
10th Swiss Geoscience Meeting Talk given at a conference Zooming in on trace metal bioavailability to phytoplankton in surface waters 16.11.2012 Bern, Switzerland Slaveykova-Startcheva Vera;
International summer school for young researchers “Ecology of large water bodies and their watershed basins” Talk given at a conference Interactions of toxic elements with biotic and abiotic components in the aquatic systems – ecotoxicological perspective 22.07.2012 Lake Baikal, B. Koty, Russia, Russia Slaveykova-Startcheva Vera; Cheloni Giulia;
Association for the Sciences of Limnology and Oceanography ASLO Aquatic Sciences Meeting Talk given at a conference Size distributions of metal-colloidal organic matter complexes and metal availability to aquatic phytoplankton 08.07.2012 Lake Biwa, Otsu, Shiga, Japan, Japan Slaveykova-Startcheva Vera;


Self-organised

Title Date Place
LAKE ECOLOGY AND TEMPORAL DYNAMICS 23.08.2014 Evian-les-Bains, France
“Ecology of large water bodies and their watershed basins” 24.08.2013 Bolshie Koty, Russia, Russia

Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Jetez-vous à l'eau! Portes ouvertes à l'Institut Forel Western Switzerland 2012
Talks/events/exhibitions Journée « Futur en tous genres » Western Switzerland 2012

Associated projects

Number Title Start Funding scheme
118989 Role of dissolved organic matter on metal speciation and biouptake by aquatic phytoplankton under condition of increased UV-B radiation 01.06.2008 SNSF Professorships
157173 Assessing metal bioavailability through transcriptome response in aquatic primary producers (continuation) 01.03.2015 Project funding (Div. I-III)
138254 Assessing metal bioavailability through transcriptome response in aquatic primary producers 01.03.2012 Project funding (Div. I-III)
152897 Phytoplankton responses to trace metals in complex environment 01.01.2015 Project funding (Div. I-III)

Abstract

The interactions of climate variability and the changes in the surface radiation are anticipated to affect the aquatic biogeochemical cycles and thus to increase the uncertainty in predicting environmental risks associated with chemical pollution. Therefore the understanding of the underlying mechanisms that govern the contaminant (e.g. toxic metal) interactions with different biotic and abiotic components in changing environment is of crucial importance for development of the predictive models for environmental risk assessment and sustainable water quality in 21st century. The present project focuses on the metal bioavailability as a mechanistic concept allowing to quantitatively linking the physical and chemical processes in the medium surrounding biota to the induced biological effects. A unique array of novel and powerful technologies will be used to determine how the interacting effects of toxic metals, increased solar radiation and dissolved organic matter (DOM) alterations will impact the photosynthetic organisms in surface waters. The photosynthetic organisms are major players in the surface water primary productivity and represent the basis of the aquatic food chain. The following key questions will be addressed: (i) To what extent increased solar radiation affect the kinetic and size speciation of metal - DOM complexes of red-ox sensitive and insensitive metals?; (ii) How does the combination of enhanced solar radiation and DOM - alteration affect metal bioavailability?; (iii) What would be consequences for the photosynthetic organisms in the surface waters? Laboratory work investigating the impact of solar radiation on metal bioavailability and effect on phytoplankton and macrophyte will provide useful insights at a mechanistic level; the proposed small scale simulations in a microcosm will increase our understanding of complex parameters controlling bioavailability and its effect photosynthetic organisms in freshwaters. The project outcomes are expected to contribute significantly in the filling of the existing gaps in the knowledge and reducing the uncertainty, concerning the combined action of chemical and other environmental stressors on the two major groups of the aquatic primary producers.
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