In France's Brenne region, medieval ponds once used for fish farming now host the largest population of endangered European pond turtles, highlighting a surprising link between human history and wildlife preservation.
Ponds in the Brenne region
In the Indre department of France, the Brenne region, nicknamed the "country of a thousand ponds," contains between 2,200 and more than 4,000 ponds. These are mostly private and still used for fish farming, but they now serve as a critical habitat for the European pond turtle, an endangered species.Habitat for the European pond turtle
The shallow ponds, bordered by mud and reed beds, closely mimic the natural habitat of the European pond turtle. This species needs calm, shallow waters with vegetation and small prey, as well as soft, sunny banks for egg-laying and mud for hibernation. Traditional carp ponds provide all these conditions.Origins of the ponds
The creation of these ponds dates back to the 12th century, when monks from abbeys like Saint-Cyran and Fontgombault began digging water bodies. Written records of these ponds became more common between the 14th and 16th centuries, a time when carp farming became widespread in the area.Conservation status of the region
The Regional Natural Park of the Brenne, covering 166,000 to 183,000 hectares, is recognized as an international wetland of importance under the Ramsar Convention. The Chérine Nature Reserve, part of the park, features 13 ponds of high ecological value, attracting visitors who want to observe the European pond turtle in its habitat.Biodiversity and threats
The Brenne region is home to over 260 bird species, making it a biodiversity hotspot. However, a 2019 university thesis warns of threats such as mercury contamination and eutrophication from modern fish farming. These issues highlight the risks of poor pond management, which can harm the very species that depend on them.Human-made ecosystems and conservation
The Brenne shows how a human-made development, originally intended for food production, has become a refuge for an endangered species. Similar examples include coal heaps turned orchid reserves and Maginot Line forts used by bats. The region highlights that biodiversity can sometimes thrive through unintended preservation, but future challenges remain in maintaining this balance.
