ECOSCOPA network : high frequency environmental database
|Author(s)||Petton Sebastien1, Pouvreau Stephane1, Fleury Elodie1|
|Contributor(s)||Penot Julia, Cheve Julien, Le Gall Patrik, Louis Wilfried, Palvadeau Hubert, Bouget Jean-Francois, Pierre Duplessix Olivier, Deborde Jonathan, Gueux Aurore, Rigouin Loic, D'Amico Florence, Messiaen Gregory, Lagarde Franck, Le Gall Erwan, Mortreux Serge, Queau Isabelle, Grizon James, Chabirand Jean-Michel, Seugnet Jean-Luc, Auby Isabelle|
|Affiliation(s)||1 : Ifremer, Univ Brest, CNRS, IRD, LEMAR, F‐29280, Plouzané, France|
|Keyword(s)||High frequency, coastal monitoring, sea temperature, practical salinity, fluorescence, turbidity|
Based on the consolidation of the Ifremer networks RESCO (https://doi.org/10.17882/53007) and VELYGER (https://doi.org/10.17882/41888), the general objective of the ECOSCOPA project is to analyze the causes of spatio-temporal variability of the main life traits (Larval stage - Recruitment - Reproduction - Growth – Survival – Cytogenetic anomalies) of the Pacific oyster in France and follow their evolution over the long term in the context of climate change.
The high frequency environmental data are monitored since 2010 at several stations next to oyster farm areas in eight bays of the French coast (from south to north): Thau Lagoon and bays of Arcachon, Marennes Oléron, Bourgneuf, Vilaine, Brest, Mont Saint-Michel and Veys (see map below). Sea temperature and practical salinity are recorded at 15-mins frequency. For several sites, fluorescence and turbidity data are also available.
Data are acquired with automatic probes directly put in oyster bags or fixed on metallic structure at 50 cm over the sediment bottom, except for Thau Lagoon whose probes are deployed at 2m below sea surface. Since 2010, several types of probes were used: STP2, STPS, SMATCH or WiSens CTD from NKE (www.nke-instrumentation.fr) and recently ECO FLNTU (www.seabird.com). The probes are regularly qualified by calibrations in the Ifremer coastal laboratories.
Precision estimated of the complete data collection process is: temperature (±0.1°C), salinity (±0.5psu), in vivo fluorescence (±10%), turbidity (±10%). The data are qualified into several levels: 0-No Quality Check performed, 1-Good data, 2-Probably good data, 3-Probably bad data, 4-Bad data, 5-Value changed, 7-Nominal value, 8-Interpolated value, 9-Missing value.
SMATCH with localized chlorination, frequency rotation: 4 months
SP2T / STPS / WiSens CTD with rotation: fortnightly in productive period otherwise monthly.
WetLab ECO FLNTU : Optical sensors which measure chlorophyll fluorescence at 470 nm and turbidity at 700 nm within the same volume. 5 measures at 1Hz every 15 mins. Fluorescence range 0-50 FFU with 0.01 FFU sensitivity / Turbidity range 0-100 NTU with 0.02 NTU sensitivity. No rotation needed, global maintenance at SeaBird facilites every two years.