Workshop on freshwater biodiversity, Selbu, Norway, 5-7 June, 1997

agua dulce ambiente de aguas interiores aquatic communities biodiversidad biodiversity eau douce environmental impact fauna faune freshwater freshwater ecology gestion des eaux impact sur l'environnement impacto ambiental inland water environment milieu des eaux continentales monde mundo pollution de l'eau ressource en eau terre humide water management water pollution water resources wetlands world