Cambios en las asociaciones recientes de foraminíferos bentónicos en el estuario del Nalón (Asturias)
- Jon Gardoki 1
- Alejandro Cearreta 1
- María Jesús Irabien 1
- José Gómez-Arozamena 2
- Víctor Villasante-Marco 3
- Ane García-Artola 1
- 1 Departamento de Geología, Universidad del País Vasco UPV/EHU, Bilbao
- 2 Departamento de Ciencias Médicas y Quirúrgicas, Universidad de Cantabria UC, Santander
- 3 Observatorio Geofísico Central, Instituto Geográfico Nacional, Real Observatorio de Madrid, Madrid.
ISSN: 0213-683X
Année de publication: 2022
Número: 71
Pages: 55-58
Type: Article
D'autres publications dans: Geogaceta
Résumé
The recent sedimentary record of the Nalón estuary was analysed using two intertidal cores and dated by 210Pb and 137Cs. The results show for the first time its characteristic benthic foraminiferal assemblages constituted by a total of 46 species, as well as the important changes experienced by these assemblages, in agreement with the environmental magnetism variations, probably due to mining activities since 1850 CE that suggest degraded environmental conditions. These characteristics persisted for decades, even beyond the closureof the coal and mercury mining activities, until the 21st century, whena slight environmental regeneration process has been observed.