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In Brazil, many smaller dams disrupt fish more than large hydropower projects


A small hydropower dam in Brazil.Victor Baptista
The development of small hydropower dams is widespread throughout Brazil and elsewhere in the world, vastly overshadowing large hydropower projects. The proliferation of these smaller dams is a response to growing energy and security needs. Their expansion, however, threatens many of the remaining free-flowing rivers and biodiverse tropical regions of the world interrupting the migrations of freshwater fishes, on which millions of peoples’ livelihoods depend.
A new University of Washington paper published Jan. 11 in Nature Sustainability quantifies these tradeoffs between hydroelectric generation capacity and the impacts on river connectivity for thousands of current and projected future dams across Brazil. The findings confirm that small hydropower plants are far more responsible for river fragmentation than their larger counterparts due to their prevalence and distribution.  ....

H Mason Keeler , Victor Baptista , Mathis Messager , Thiago Couto , Rufford Foundation , National Geographic Society , Florida International University , College Of The Environment , Uw School Of Aquatic , Fishery Sciences , University Of Washington , Mcgill University , School Of Aquatic , Nature Sustainability , Julian Olden , Florida International , Keeler Endowed Professorship , Science Without Borders Fellowship , National Geographic , ஏச் கொத்தனார் கீலர் , வெற்றியாளர் பாப்டிஸ்டா , மதிஸ் செய்தி , தியாகோ கொட்டோ , தேசிய புவியியல் சமூகம் , புளோரிடா சர்வதேச பல்கலைக்கழகம் , கல்லூரி ஆஃப் தி சூழல் ,