The studies conducted by S.A.O. were cited and applied when the analysis was made of freshwater and marine aquatic ecosystems and water quality in various regions as diverse as Europe (McIvor, 2004; Lobova et al., 2002), North America (Vaughn, Spooner, 2008), Mexico (Ramirez et al. 2005), Turkey (Yilmaz et al., 2006), Australia (Dafforn et al, 2009), Brazil (Passerini et al., 2009), China, India.
Some references see attached.