An immense forest covers 60% of the Vosges Mountains, home to a wealth of plant and animal species: large mammals and microscopic insects live side by side beneath the tall trees. And both plants and animals are subject to the cycle of sunlight available through the dense foliage.
The Loire is one of Europe's last free-flowing rivers − one of the few whose banks have not been developed and confined by man. As the seasons change, its water level rises and falls and the morphology of the river-bed alters. How do plants and animals adjust to these variations?