RT Journal Article T1 Sedimentary environmental quality of a biosphere reserve estuary in southwestern Iberian Peninsula A1 Barba Lobo, Alejandro A1 García González, B. A1 Guerrero Márquez, José Luis A1 Bolívar Raya, Juan Pedro AB The Huelva estuary is formed by the common mouths of the Odiel and Tinto Rivers, and inside this ecosystem is the biosphere reserve of the Odiel saltmarshes. This ecosystem has been historically affected by acid mine drainage (AMD) and by releases of pollutants from five phosphoric acid industrial plants and phosphogypsum (PG) waste stacks located in the area. This study carried out a comprehensive assessment of the environmental impact of the biosphere reserve of the Odiel saltmarshes. To this end, it was necessary to find a suitable sedimentary background (Piedras River in our case). To quantify this impact, several pollution indexes were used. According to the values reached by the indexes, this impact was classified as "serious" pollution for most trace elements, excepting the deepest layers, and "low-moderate" pollution for the 238U-series radionuclides, while no pollution for the 232Th-series and 40K radionuclides was found as expected. PB Elsevier SN 0025-326X SN 1879-3363 (electrónico) YR 2024 FD 2024-03 LK https://hdl.handle.net/10272/23981 UL https://hdl.handle.net/10272/23981 LA eng NO Barba-Lobo, A., García-González, B., Guerrero, J. L., & Bolívar, J. P. (2024). Sedimentary environmental quality of a biosphere reserve estuary in southwestern Iberian Peninsula. In Marine Pollution Bulletin (Vol. 201, p. 116225). Elsevier BV. https://doi.org/10.1016/j.marpolbul.2024.116225 NO This research was partially funded by the University of Huelva andthe Operative FEDER Program-Andalusia 2014-2020 (UHU-1255876,UHU-202020); The European Regional Development Fund through theSpanish Ministry of Science, Innovation and Universities' ResearchAgency (research grants PID2020-116461RB-C21 and 116461RA-C22);and the Andalusian government (I + D + i-JAPAIDI-Retos, project Ref.:PY20_00096, and Diagnosis and proposals for the environmental recoveryof areas affected by industrial and mining activities; Implicationsfor the Huelva estuary (RESTOREHU), Ref.: TED2021-130361B-I00).Jos´e Luis Guerrero thanks the Spanish Ministry of Universities for theMargarita Salas research grant. DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026