부산대학교 도서관

Keywords: downstream passage; freshwater fish; hydropower; mortality; river; Hidroeléctrica; mortalidad, paso río abajo; paso río abajo; peces de agua dulce; río; ä¸æ¸¸é±¼é; 淡水鱼类; æ°´çµ; 死亡ç; æ²³æµ Abstract Globally, policies aiming for conservation of species, free-flowing rivers, and promotion of hydroelectricity as renewable energy and as a means to decarbonize energy systems generate trade-offs between protecting freshwater fauna and development of hydropower. Hydroelectric turbines put fish at risk of severe injury during passage. Therefore, comprehensive, reliable analyses of turbine-induced fish mortality are pivotal to support an informed debate on the sustainability of hydropower (i.e., how much a society is willing to pay in terms of costs incurred on rivers and their biota). We compiled and examined a comprehensive, global data set of turbine fish-mortality assessments involving >275,000 individual fish of 75 species to estimate mortality across turbine types and fish species. Average fish mortality from hydroelectric turbines was 22.3% (95% CI 17.5-26.7%) when accounting for common uncertainties related to empirical estimates (e.g., handling- or catch-related effects). Mortality estimates were highly variable among and within different turbine types, study methods, and taxa. Technical configurations of hydroelectric turbines that successfully reduce fish mortality and fish-protective hydropower operation as a global standard could balance the need for renewable energy with protection of fish biodiversity. Article Note: Article impact statement Downside of green hydroelectricity--detrimental impacts of hydropower on fish needs careful assessment, quantification, and mitigation. CAPTION(S): Supporting information Byline: Johannes Radinger, Ruben van Treeck, Christian Wolter