Contenido de metales en sedimentos y en Emerita analoga (Stimpson, 1857), en bahia Mejillones del Sur, Chile

Abstract

Contenido de metales en sedimentos y en (Stimpson, 1857) in eight sectors of south Mejillones Bay, Chile was determined. Only Zn showed a certain degree of contamination in the sediments of the bay with a rate of geoaccumulation of 2.8. In analyzing the content of metals in E. analoga, we determined that this species would bioaccumulate some of the metals analyzed but low magnitude, with the exception of Zn bioaccumulation factor of 2.07. The similarity dendrogram performed with bioaccumulation index data related the values of this index with the spatial distribution of major industries and urban areas. This concordance allows establishing that E. analoga be responding as an indicator of environmental health for this system. It is also important to note that this bay is experiencing the first signs of a moderately impacted industrial area. Therefore it is necessary to generate consistent measurements, covering more than an environmental matrix, in order to control the human impact in this highly productive coastal marine ecosystem.

Contamination of urban soils in a historical mining town of northern Chile

“…Lipesed Cu-refining company 2021). Known sacrifice zones of Chile correspond to: Coronel in Southern Chile (Tume et al 2021), Ventanas in Central Chile (Oyarzo-Miranda et al 2020), Huasco (Pérez et al 2019) in North-Central Chile, and Mejillones (Guiñez et al 2015) and Tocopilla (Jorquera 2009) in Northern Chile (Fig. 1B).…”

Contaminación por elementos trazas en sedimentos superficiales marinos de la bahía del Callao, Perú

“…En sus aguas, existe un intenso tráfico marítimo, pesca y turismo, y sus playas reciben millones de bañistas (Velazco, 2011). Los desechos domésticos, industriales y portuarios son la principal fuente de contaminación y de elementos trazas en las aguas costeras (Valdés et al, 2011;Guíñez et al, 2015;Sáez et al, 2018). Los sedimentos marinos constituyen el principal reservorio de elementos trazas de la mayoría de las sustancias de origen antrópico en los ecosistemas marinos (Hasan et al, 2013;Marín et al, 2016;Braga-Castro et al, 2018;Enrique-Romero et al, 2019) y se ha registrado la presencia de Cd, Ni y Mn (Solís et al, 2011).…”

“…In these waters, there is intense maritime traffic, fishing, and tourism, and their beaches receive millions of bathers (Velazco, 2011). Domestic, industrial, and port waste are the main source of pollution and trace elements in coastal waters (Valdés et al, 2011;Guíñez et al, 2015;Sáez et al, 2018). Marine sediments constitute the main trace elements reservoir for most substances of anthropic origin in marine ecosystems (Hasan et al, 2013;Marín et al, 2016;Braga-Castro et al, 2018;Enrique-Romero et al, 2019), and the presence of Cd, Ni, and Mn has been recorded (Solís et al, 2011).…”

Benthic Foraminifera as Pollution Biomarkers: a Morphological Approach

“…Despite being a heavily intervened area, few studies have been carried out on invertebrate organisms as bioindicators of adverse conditions in the bay. Among these we highlight the work of [22], referring to the effect of dredging on the diversity of macrobenthic communities due to the construction of Angamos Port, and an ex-situ research carried out by Guiñez et al [23], who studied the bioaccumulation of heavy metals in the crustacean Emerita analoga in the intertidal zone of the bay. Therefore, our work focused on implementing foraminifera as early biomarkers of heavy metal contamination, based on their morphological responses indicating environmental stress effects.…”