Effects of human activities on metabolic parameters in an invasive and a native bivalve in the lower section of Paraná river Efectos de las actividades antrópicas sobre parámetros metabólicos en un bivalvo invasor y otro nativo en el tramo inferior del río Paraná

ABAD, TATIANA NOYA; PELUSO, JULIETA; MINABERRY, YANINA S.; ROJAS, DANTE E.; CRISTOS, DIEGO; DE ALMEIDA, HENRIQUE KNACK; YUSSEPPONE, MARÍA S.; ARONZON, CAROLINA M.; CALCAGNO, JAVIER Á.; SABATINI, SEBASTIÁN E.

ECOLOGÍA AUSTRAL

ASOCIACIÓN ARGENTINA DE ECOLOGÍA

Año: 2022 vol. 32 p. 1089 - 1105

0327-5477

The relationship between anthropogenic pollution, geochemistry and natural dynamics of freshwater ecosystems determine the spatial and temporal patterns of water quality. Human activities and the introduction of exotic species are the main causes of the decrease in biological diversity. The introduction and spread of the invasive bivalve Corbicula fluminea endangers the presence of the native bivalve Diplodon delodontus. Through oxidative stress indicators, it is possible to quantify the response of organisms to changes in physical-chemical, natural and/or anthropogenic variables. Therefore, the objective was to interpret the effect of changes in physical-chemical variables, contaminants and/or xenobiotics on the metabolic responses of C. fluminea and D. delodontus on the Paraná de las Palmas river. Randomly, we established a sampling point to collect individuals (60 of invasive and 10 of native bivalve) for the assembly of 10 cages by species and placement site in September 2018. In June and September 2019, five cages of each species were extracted at random. In water, physical-chemical parameters and metals were measured, and in the organs of both species, protein concentration, glycogen, lipid damage, reduced glutathione content, enzymatic activity of catalase and glutathione-S-transferase. In general, the physical-chemical and metal parameters increased significantly from June to September. Metals exceeded freshwater quality guideline levels for the protection of aquatic life. In relation to the changes in these variables, the metabolic parameters differed between organs and species from June to September. The gills and digestive gland of C. fluminea showed higher metabolic responses and faster than D. delodontus. The study of invasive and native species through the measurement of multiple variables is a useful tool to characterize the environment, with application prospects in water quality monitoring and conservation studies.