Since 2013, Andromède Océanologie, with the support of the Rhone Mediterranean and Corsica Water Agency, has been equipping the coralligenous (RECOR network) and Posidonia meadows (TEMPO network) monitoring sites with HOBO Water Temp Pro v2 temperature sensors. 239 sensors (147 RECOR sensors and 92 TEMPO sensors) are currently acquiring data between 5 and 115 meters depth in the French Mediterranean. These sensors allow a measurement every 30 minutes for 5 years. Their distribution as well as the high frequency of measurements will allow us to produce background temperature maps and to correlate our biological observations on the TEMPO and RECOR sites with variations in this abiotic parameter.
The installation of temperature sensors started in 2013 on 26 RECOR sites (PACA East), then was completed in 2014 on 18 RECOR sites (Corsica) ; in 2015 on 93 sites located in the three regions, including 32 RECOR sites and 61 TEMPO sites (lower limit and intermediate depth) ; in 2016 on 18 RECOR sites and 18 TEMPO sites in PACA East ; in 2017 on 17 RECOR sites (Corsica) and on 30 TEMPO sites (29 sites in Corsica and 1 site in PACA East) ; in 2018 on 37 RECOR sites (3 sites in Corsica, 3 in Occitania and 31 in PACA West) and 25 TEMPO sites (22 sites in PACA West and 3 in Occitania) ; in 2019 on 58 RECOR sites and 35 TEMPO sites in PACA East, and finally in 2020 on 40 RECOR sites and 33 TEMPO sites in Corsica. In addition, a field campaign in the Parc Naturel Marin du Cap Corse et de l’Agriate (PNMCCA) in July 2020 installed 14 sensors on deep coralligenous reefs, between 47 and 115 meters in the park. Table 4 summarizes the history of sensor installations and readings since 2013.
This study has several objectives :
(1) To carry out in the short term a first modeling of the background temperature on the PACA and Corsica coastline from the sensors recovered following the RECOR (sensors every 5-20km ; one temperature measurement every hour) ; and TEMPO campaigns.
(2) To perpetuate the installation of temperature sensors for long-term monitoring at these depths (between -5 and -70 m) ;
(3) To allow the calibration of physical temperature models by providing reliable high frequency in-situ data over the entire French Mediterranean coastline ;
(4) To correlate observed diversity and vitality data (seagrass and coralligenous) with temperature data.
This will allow us to better understand the biological data, to distinguish between anthropogenic and environmental factors and to predict the impact of climate change on marine biodiversity.
A map of the location of the sensors set up since 2013 can be seen on the platform, by clicking on the « Access the maps » button, just below.
Contact : Guilhem Marre
Project leader: Andromède Océanologie
Update frequency: One monitoring per year per region (each region, Occitanie/PACA West, PACA East and Corsica, is monitored every three years).
Partners: Rhone Mediterranean and Corsica Water Agency and OSU-OREME