River Dordogne boasts a rich and vibrant ecosystem that evolves with the seasons and temperatures. In summer, as water levels drop and temperatures rise,cyanobacteria benthic can thrive on pebbles and in areas with slower currents.
This phenomenon, which has existed for many years and is entirely natural , simply requires a few common-sense rules and tips. By following these guidelines, you can fully enjoy water activities such as canoeing and swimming on the Dordogne.
What are cyanobacteria?
Cyanobacteria cyanobacteria are among the oldest living organisms on Earth (3.8 billion years old).
They play a vital role in the ecosystem, particularly in the self-purification of waterways, just like sediments and other living organisms. Furthermore, cyanobacteria can produce numerous chemical molecules, some very useful (antibiotics, antivirals, antitumor agents, etc.) and others harmful, such as toxins (also called cyanotoxins).
present in river and lake water, cyanobacteria can produce toxins without any health impact. The problem arises when Naturally are present in very large numbers and secrete significant quantities of toxins.
Source : Tarn-Amont Watershed Joint Syndicate
Common sense rules
Here are some simple rules to apply during your holidays or in your daily life:
- Do not swim in areas of stagnant or murky, water with a strong odor or with deposits on the surface.
- Favor swimming in rivers near developed beaches, where water quality is regularly monitored and controlled by the SYDED of Lot and the ARS.
- Before swimming, check the water quality readings for the Dordogne River published on the Inf'eau Loisirs website of the SYDED du Lot, a good habit to adopt to enjoy our beautiful river safely!
My dog and cyanobacteria
Dogs are very sensitive to the toxins produced by cyanobacteria. To protect them,
don't let your dog drink directly from the river: a water bottle is safer!
What symptoms should I watch for?
Excessive salivation, diarrhea or vomiting, excessive thirst, trembling, restlessness, sudden fatigue, or any unusual behavior.
If symptoms appear, especially after swimming, call a veterinarian immediately.
How are we protected on the Dordogne?
In the Dordogne Valley, institutions monitor water quality and the presence of cyanobacteria in the Dordogne River. This ensures maximum safety when engaging in recreational activities.
- checks of bathing water quality are carried out by theRegional Health Agency (ARS).
- can Prefectural decrees be put in place as soon as an area becomes too risky.
- The SYDED DU LOT , with its Inf'Eau Loisirs system, allows you to consult daily water quality bulletins. You will also find forecasts for the coming days.
- workshops run by associations on the supervised beaches of the Dordogne Valley, such as in Gluges
Note: The presence of cyanobacteria does not call into question the good quality of river water.
