Birnie-Gauvin, K., Larsen, M. H., Nielsen, J., & Aarestrup, K. (2017).30 years of data reveal dramatic increase in abundance of brown trout following the removal of a small hydrodam. Journal of Environmental Management, 204, 467-471.
“New study shows huge increase in fish following barrier removal, with positive effects at a whole-system level, not just at a local scale” explains Kim Birnie-Gauvin (AMBER, Horizon2020). You can read full article and check scientific paper abstract in AMBER website.
