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Dams and biodiversity

Photo credit: bluechannel24

Balbina Dam has hit populations of mammals, large gamebirds and tortoises, researchers say, warning against hydro push.
Widely hailed as ‘green’ sources of renewable energy, numerous hydroelectric dams have been built worldwide, but research reveals they are far from environmentally friendly.

Brazil: Hydroelectric dams drastically reduce tropical forest biodiversity

A study puiblished in online journal PLOS ONE from the University of East Anglia (UEA) has revealed the drastic effects of the major Amazonian Balbina Dam on tropical rainforest biodiversity. The research reveals a loss of mammals, birds and tortoises from the vast majority of islands formed by the creation of the vast Balbina Lake, one of the world’s largest hydroelectric reservoirs.

Lead author and UEA graduate Dr Maíra Benchimol, of the Universidade Estadual de Santa Cruz, Bahia, Brazil, said: “Hydroelectric dams have been thought to be an environmentally friendly source of renewable power, and in recent years have been built to supply the burgeoning energy demands of emergent tropical countries.

Previous studies have shown that large dams result in severe losses in fishery revenues, increases in greenhouse gas emissions and socioeconomic costs to local communities. Our research adds evidence that forest biodiversity also pays a heavy price when large dams are built.

Read the full article: bluechannel24

Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.