The Rio Bersella benthos report
The rio Bersella being located near a mine has undergone violent and disruptive transformations in the last centuries. Part of the riverbed was cemented and in the 40s a tunnel was built under its bed to transport the mine's drains. The mine was closed in 1971. Since then, the nature is slowly reclaiming the territory back. In the pools formed by the the concrete steps I saw discreet trout. In regards of the macrobenthos, see the report below
Sampling date: 15 August 2022
Coordinates: 45.519729,7.758422
Height: 1020m. asl
Water Temp: 10.0 C
WATER'S BIOTIC INDEX: 9
The sampled stretch of the brook is about 1 km upstream of the mine
