Platform Aquatic biogeochemistry
As part of the ECOBIOC team, the platform ‘Aquatic Biogeochemistry’ brings together a range of scientific and technical skills relate to the dynamics of biogenic elements (C, N, P, Si), associated compounds (O₂, S) and biogeochemical processes in aquatic ecosystems. This involves the analysis of a large number of compounds linked to the production, transfer and remineralisation of organic matter, including chemical elements that are sensitive to the redox conditions of the studied environment. In addition to aquatic biogeochemistry, our technical expertise also enables us to carry out analyses on matrices such as plants, soil, animals, etc. This platform is based at the Pessac and Arcachon sites.
Managers
Scientific leader
Nicolas Savoye
Technical managers
Nathalie Labourdette
Deputy : Martin Danilo
Applications / Expertises
Expertise 1: Study of dissolved elements in aqueous environments
- Fresh/brackish/salt water.
- Water column, pore water.
- Dissolved gases, nutrients, organic matter.
Expertise 2: Study of biogenic elements in particulate/solid matrix
- Suspended particles, sediment, soil, plants, animals.
- Organic and inorganic matter.
Instruments
Combustion technique
- Dissolved organic carbon (TOC-L Shimadzu).
- Particulate organic carbon Total carbon, Particulate nitrogen Total nitrogen (Flash Smart ThermoFisher Scientific).
Colorimetry technique
- nitrite, nitrate, ammonium, phosphate, silicate (AA3, QuAAtro – Seal Analytical).
- pH (Cary 60 Agilent).
Fluorescence technique
- Chlorophyllae (10-AU Turner Design).
- Ammonium ( Trilogy Turner design).
- Chlorophylles (a,b,c), phaeopigments (a,b,c) (LS55 Perkin Elmer).
Static volumetry technique
- Measurement of the apparent specific surface area of sediment (Gemini 2390 VII Micrometrics).
Volumetric titration technique
- Determination of dissolved oxygen by iodometry (Winkler method; Metrohm Titrators type Ti-Touch 916 & Titrando 905 fitted with 2 Dosino 800).