Bebianno, Maria JoãoGonzalez-Rey, MariaVeiga-Pires, C.2018-01-092018-01-092017Bebianno, Maria João; Gonzalez-Rey, Maria; Veiga-Pires, Cristina Carvalho. Chemical stressors in the Guadiana River, In Guadiana River Estuary: Investigating the past , present and future, 113-125, ISBN: 978-989-8859-18-1. Faro: Centre for MArine and Environmental Research (CIMA), 2017.978-989-8859-18-1AUT: MBE00379; CVP01371;http://hdl.handle.net/10400.1/10297The Guadiana River,the fourth major river of the Iberian Peninsula,represents an important aquatic system from a socio,geo and ecological point of view for Portugal and Spain. Important economic activities such as agriculture,tourism and aquaculture are present along with several economic facilities such as harbour (commercial and fishing),marina and small shipyards for construction and repair of small vessels.All these activities generate wastes some of them toxic to the aquatic environment.engbook part2018-01-09