A new research has unveiled that construction of more dams has been posing a threat of extinction for mammals, birds and tortoises in the Amazon. The research paper by England's University of East Anglia has stated that the researchers can sense the extinction risk.

Study's co-author Carlos Peres, a Brazilian professor at the university's School of Environmental Sciences, said that they have found shocking extinction taking place at local level. Brazil has to depend on hydropower for its majority of its electricity.

In fact, it has plans to come up with new dams in order to fulfill the increasing energy demand. In comparison to all other renewable sources, hydropower produces more electricity across the world, but the brunt has to be faced by the ecology.

It has been said so, as Brazil's Balbina Dam has turned what was once a forest into an artificial archipelago of 3,456 islands from where many vertebrates have disappeared. Peres said that there is no doubt that hydropower is an effective way to generate electricity, but many things also depend on topography.

According to which, a hydropower plant in flat areas does not produce as much energy as it does in the mountains. In those areas, it also loses many carbon-storing trees and other vegetation. Extinction rate on the three dozen islands that they have surveyed is 42%. The researchers have affirmed that the extinction rate can jump to 70% for the complete reservoir area.