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Novel technologies to reveal the impacts of nutrient limitation in aquatic systems: from biodiversity to biogeochemical cycles

English title Novel technologies to reveal the impacts of nutrient limitation in aquatic systems: from biodiversity to biogeochemical cycles
Applicant Hassler Christel
Number 138955
Funding scheme SNSF Professorships
Research institution Institut F.-A. Forel Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Oceanography
Start/End 01.01.2013 - 31.12.2016
Approved amount 1'586'614.00
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All Disciplines (2)

Discipline
Oceanography
Hydrology, Limnology, Glaciology

Keywords (12)

nutrient; limitation; phytoplankton; iron; nitrate; Southern Ocean; lake; biogeochemical cycle; bioavailability; biodiversity; phosphate; biosensor

Responsible applicant and co-applicants

Employees

Publications

Publication
Nutrient uplift in a cyclonic eddy increases diversity, primary productivity and iron demand of microbial communities relative to a western boundary current
Doblin MA, Petrou K, Sinutok S, Seymour J, Messer LF, Brown MV, Norman L, Everett JD, McInnes A, Ralph P, Thompson PA, Hassler C (2016), Nutrient uplift in a cyclonic eddy increases diversity, primary productivity and iron demand of microbial communities relative to a western boundary current, in PeerJ, 1973.
The Australian phytoplankton database – abundance and biovolume
[18]. Davies C.H. Coughlan A. Hallegraeff G. Ajani P. Armbrecht L.et al. (2016), The Australian phytoplankton database – abundance and biovolume, in Scientific Data, Nature, 160043.
The Southern Ocean carbon sink in a changing climate
[17]. Petrou K. Kranz S.A. Trimborn S. Hassler C.S. Blanco Ameijeiras S. Ralph P.J. Davidson A (2016), The Southern Ocean carbon sink in a changing climate, in Journal of Plant Physiology, 135.
The role of bacterial and algal exopolymeric substances (EPS) on iron chemistry
Norman Louiza (2015), The role of bacterial and algal exopolymeric substances (EPS) on iron chemistry, in Marine Chemistry, 173, 148.
Iron biogeochemistry in aquatic systems : from source to bioavailability
Norman Louiza et al. (2014), Iron biogeochemistry in aquatic systems : from source to bioavailability, in Chimia, 68, 764-771.
Primary productivity induced by Iron and Nitrogen in the Tasman Sea-An overview of the PINTS expedition
Hassler Christel et al. (2014), Primary productivity induced by Iron and Nitrogen in the Tasman Sea-An overview of the PINTS expedition, in Marine and Freshwater Research, 65, 517-537.
The impact of iron limitation on the physiology of the Antarctic diatom Chaetoceros simplex
[29]. Petrou K. Trimborn S. Rost B. Ralph P.J. Hassler C.S. (2014), The impact of iron limitation on the physiology of the Antarctic diatom Chaetoceros simplex, in Marine Biology, 925.
Iron associated with exopolymeric substances is highly bioavailable to oceanic phytoplankton
Hassler Christel et al., Iron associated with exopolymeric substances is highly bioavailable to oceanic phytoplankton, in Marine Chemistry.
Physiological characteristics of open ocean and coastal phytoplankton communities of Western Antarctic Peninsula and Drake Passage waters.
Trimborn Scarlett et al., Physiological characteristics of open ocean and coastal phytoplankton communities of Western Antarctic Peninsula and Drake Passage waters., in Deep-Sea Research I.

Collaboration

Group / person Country
Types of collaboration
Institute Forel/University of Geneva Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Alfred-Wenger Institute for Polar and Marine Research Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Physique Appliquée/Université de Genève Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Life Science/Bowling Green State University United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
14th Swiss Geoscience Meeting Poster Relevance of iron speciation with respect to the distribution of humics and phytoplankton in Lake Geneva 01.11.2016 Geneva, Switzerland Hassler Christel; Cabanes Damien; Moisset Sophie;
14th Swiss Geoscience Meeting Poster Trace metal and iron isotope cycling in the meromictic Lake Cadagno 01.11.2016 Geneva, Switzerland Hassler Christel; Moisset Sophie;
SCAR 2016 Poster Linking iron chemistry with bioavailability in the Southern Ocean 01.08.2016 Kuala Lumpur, Malaysia Hassler Christel; Cabanes Damien; Blanco Amejeiras Sonia;
SCAR 2016 Talk given at a conference The effect of exopolymeric substances on iron limited phytoplankton assemblages from the Southern Ocean 01.08.2016 Kuala Lumpur, Malaysia Cabanes Damien; Hassler Christel; Blanco Amejeiras Sonia;
Gordon Research Conference – Ocean Biogeochemistry Poster Iron speciation and distribution of “usual suspects” binding ligands along the GEOTRACES (GP13) southwestern pacific section 01.06.2016 Hong Kong, Hongkong Cabanes Damien; Hassler Christel;
Gordon Research Conference – Ocean Biogeochemistry Poster Linking nutrients to phytoplankton in the Pacific Ocean 01.06.2016 Hong Kong, Hongkong Cabanes Damien; Hassler Christel;
6th European Phycological Congress Talk given at a conference Iron limitation in the cyanobacteria Synechococcus sp.: from gene expression to physiological responses 01.08.2015 London, Great Britain and Northern Ireland Blanco Amejeiras Sonia; Hassler Christel;
Symposium for European Freshwater Sciences Poster Application of cyanobacteria bioreporters for environmental nutrient bioavailability in lake Geneva 01.07.2015 Geneva, Switzerland Hassler Christel; Moisset Sophie; Cabanes Damien; Blanco Amejeiras Sonia;
Workshop Organic Ligands – A key control on trace metal biogeochemistry in the Ocean Individual talk On the role of exopolymeric substances (EPS) and saccharides on iron biogeochemistry 01.04.2015 Split, Croatia Hassler Christel;
International conference on Atmospheric dust Talk given at a conference Influence of Australian desert dust on marine iron chemistry and bioavailability to phytoplankton 01.06.2014 Castellaneta Marina, Italy Hassler Christel;
Speciation Workshop Individual talk Distribution of HA-like and relationship between organic ligands, iron chemical speciation and phytoplankton 01.05.2014 Liverpool, Great Britain and Northern Ireland Hassler Christel;
ASLO Ocean Sciences meeting Talk given at a conference Relationship between organic ligands, iron and zinc chemical speciation, and phytoplankton in the Tasman Sea 23.02.2014 Honolulu, United States of America Hassler Christel;
Workshop When Genetics meet Oceanography Talk given at a conference On the use of bioreporter to report iron limitation 14.10.2013 Banyuls-sur-Mer, France Hassler Christel;
Seminar at University of Lansing Individual talk Elucidate the link between nutrients and phytoplankton dynamics in lentic systems 20.09.2013 Michigan, United States of America Moisset Sophie;
From the Alps to the Atlantic-water in a changing climate (a meeting between the University of Geneva and Woods Hole Oceanographic Institute, Boston, USA) Talk given at a conference Nutrient limitation on phytoplankton: from cellular processes to climate 25.06.2013 Boston, United States of America Hassler Christel;
Workshop on Iron Biogeochemistry Poster Impact of bacterial, phytoplanktonic and natural exopolymeric substances on iron biogeochemistry 03.03.2013 Monté-Vérita, Switzerland Hassler Christel;
Ocean Science Meeting 2013 Talk given at a conference Oceanic iron enrichement from atmospheric dust: from chemistry to bioavailability 17.02.2013 Nouvelle Orleans, United States of America Hassler Christel;
Ocean Science Meeting 2013 Talk given at a conference Impact of bacterial, phytoplanktonic and natural exopolymeric substances on iron biogeochemistry 10.02.2013 Nouvelle Orleans, United States of America Hassler Christel;
Ocean Science Meeting 2013 Talk given at a conference Role of different iron sources on phytoplankton growth and species composition of the Antarctic Circumpolar Current under ocean acidification 10.02.2013 Nouvelle-Orléans, United States of America Hassler Christel;


Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Metrohm Autolab User Meeting Talk 27.10.2015 Zofingen, Switzerland Blanco Amejeiras Sonia; Cabanes Damien; Moisset Sophie; Hassler Christel;
Discussion autour du thème Océan et Climat avec des élèves 6-7P Workshop 13.06.2013 Ecole d'Onex Parc, Switzerland Hassler Christel;
Table ronde - Planète Océan Workshop 23.05.2013 Museé d'Histoire Naturelle, Switzerland Hassler Christel;
Discussion autour des changements climatique avec des classes 6-7P Workshop 02.05.2013 Ecole d'Anières, Switzerland Hassler Christel;


Communication with the public

Communication Title Media Place Year
Media relations: radio, television CQFD TSR Western Switzerland 2016
Media relations: print media, online media Algues et bactéries croisent le fer dans des océans anémiques CAMPUS journal from University of Geneva Western Switzerland 2015
Media relations: print media, online media Swiss polar research – pioneering spirit, passion and excellence Swiss Federal Depart ment of Foreign Affairs Western Switzerland German-speaking Switzerland 2015
Media relations: radio, television Telejournal TSR Western Switzerland 2013

Associated projects

Number Title Start Funding scheme
166197 Impact of interactions between microorganisms on iron and carbon recycling in the Southern Ocean : consequences for iron limitation 01.01.2017 SNSF Professorships

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