Historical summary of the Ciemat activities in the field of radioecology

This paper is a historical summary of the Ciemat activities in the field of radioecology, carried out, in the most of the cases, in a abroad national and international framework. It also presents the most relevant results obtained. Among them, experimental research, modelling and assessment activities are described, all of them relevant from a radioecological point of view for predicting, understanding and quantifying the mechanisms and processes governing the radionuclides environmental behaviour and their pathways to research humans and wildlife. An extensive list of reference is given in order to facilitate the reader access to more specific information related to any of the described areas. (Author) 56 refs.