The Rennes platform includes about 200 mesocosms (0.4 to 30 m3) and allows for a high replication of experimental treatments. We can reconstruct pond communities from invertebrates to fish to study their response to external forcing (natural or anthropogenic). Our mesocosms are also equipped for ecotoxicology experiments and manipulation of invasive species (we are accredited and master confinement and treatment procedures).
The Lapitxuri semi-natural stream (15 km from the INRA St Pée Institute) is fed by a diversion of a natural headwater stream. It is separated into 13 consecutive reaches (10m x 2.8m) allowing it to work with pseudo-replicates (each reach can be closed by downstream traps). T). Direct underwater observations can be performed on two reaches from an underground room. More classical mesocosms are available: 16 swedish tanks (2.5 m3), 8 circular tanks (0.1 m3), 6 indoor flumes (4.5 m long), 8 outdoor flumes (11m x 0.5m).
1) The Experimental Lake Platform consists of 16 artificial lakes (30 m x 15 m x 3 m deep, 800 m3 each) designed to simulate the spatial heterogeneity and biological complexity of small, continental freshwater bodies (Figure 1). These large experimental systems are spatially structured, with shallow littoral areas, a central pelagic zone and a central benthic area, and may be interconnected along 4 rows of 4 lakes each through 10 m long dispersal channels. In addition, each lake is equipped since June 2016 with automated sensors and data loggers providing detailed and real time information on physical and biological conditions along the water column from the central pelagic zone.
Pelagic, marine, outdoor, in-situ
1. Permanent floating structure: up to 12 pelagic mesocosms (1.2 m diameter, 2 m depth, ~2 m3 volume each). Fig. 1 & 2
2. Permanent floating structure: 3. Indoor structure:
3. Mobile: LAMP is composed of 9 individual structures that can be deployed individually or bonded according to experimental design. Fig. 3