Abstract
Amazon aquatic systems have been investigated throughout the years and there is a great deal of knowledge on hydrological processes and aquatic ecology at local level (Huszar et al. 1997 Bonnet et al. 2008, Rudorff et al. 2014a/b) and at large scale (Forsberg et al. 1988, Junk and Piedade, 1997, Wilson et al. 2007). However there is a lack of knowledge on the Optical Properties (OPs) of f…