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In considering the inseparability between society, development and environment, the ecosystem approach advocates the understanding of interdependence relations between biological, physicalchemical, economic and historical-cultural ecosystems. The environmental contamination of anthropogenic origin is presented as one of the reflections added to the discourses that permeate the conservation issues, the uses of natural goods in common use and of the spatiotemporal uncertainties associated with the knowledge of the self-maintenance of ecosystems and the geographic expansion of capitalism. The coast of Paraná coexists with an operational scenario of productive markets that expose the problem of environmental contamination by potentially toxic metallic ions. Therefore, the identification of these threads from the dialectic between historical and natural conditions and the experimental approach, with the use of biological material from Lontra longicaudis and analytical chemistry techniques, aim at the characterization and understanding of territorial tendencies, multicausality and relations of interdependence between natural and social processes. The results turn to referral to a long-term state of entropy and entropic death. Through this approach, the elaboration and systematization of data of the deterioration of an entire system interconnected by dynamics of matter and energy, together with an effective management, transfigures the integrated and predictive capacitation with a focus on the establishment of ecological attitudes towards sustainability. It also leads to the need for a system of procedures to prevent, monitor, control and monitor the quality of social and environmental life.

brazilian journal of development

O SILENCIOSO GRITO QUÍMICO: RISCOS E AMEAÇAS NO RIO GUARAGUAÇU SOB A PERSPECTIVA ECOSSISTÊMICA / THE QUIET CHEMICAL SCREAM: RISKS AND IMMINENT THREATS IN THE GUARAGUAÇU RIVER UNDER THE ECOSYSTEM SYSTEM