The University of Helsinki said the rising number of beaver dams has caused an increase in water levels in rivers and ponds, resulting in organic carbon from the soil being released into the atmosphere. Petri Nummi, a lecturer at the university, has been observing links between beavers’ lifestyle and global warming. “An increase in the number of beavers has an impact on the climate since a rising water level affects the interaction between beaver ponds, water and air, as well as the carbon balance of the zone of ground closest to water,” he said. There is an indication of beaver ponds becoming carbon sinks or sources of the gas and it is estimated that these ponds and meadows could potentially release up to 820,000 tons of carbon annually. Beaver lifestyle found to be impacting on global warming Bastards.