Dissolved and particulate metals dynamics in a human impacted estuary from the SW Atlantic

Colla, Noelia Soledad la; Negrin, Vanesa Lorena; Marcovecchio, Jorge Eduardo; Botté, Sandra Elizabeth

doi:10.1016/j.ecss.2015.05.009

Cited by 53 publications

(18 citation statements)

References 55 publications

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“…The mean concentrations of all other particulate metals except Fe, Cr and Ni were within the range reported in the other coastal areas listed in Table 3 . The mean concentration of Fe recorded in this study was lower than the concentrations in the Bahía Blanca Estuary [ 27 ] and the major river estuaries in the East Hainan Island [ 23 ] ( Table 3 ). The mean concentrations of Cr and Ni in this study were higher than those in the Yellow River Estuary [ 28 ] ( Table 3 ).…”

Section: Resultscontrasting

confidence: 62%

Spatial distribution and correlation characteristics of heavy metals in the seawater, suspended particulate matter and sediments in Zhanjiang Bay, China

et al. 2018

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Concentrations of eight heavy metals (i.e., Fe, Mn, Cr, Ni, Cu, Zn, Cd and Pb) in the seawater, suspended particulate matter (SPM) and sediments of the Zhanjiang Bay were investigated in 2014. The concentrations of metals were generally low in the seawater and sediments of the Zhanjiang Bay in winter and summer, indicating good environmental quality in the bay. The distribution patterns of Fe and Mn in three phases indicated the influence of terrestrial inputs. The partition coefficients log(Kd) between the dissolved and particulate phases showed a general decrease in the order of Pb≈Cd>Fe≈Mn>Ni≈Cr>Zn>Cu. The concentrations of some metals in the dissolved and particulate phases showed seasonal variations. Phytoplankton production and complexation reactions may contribute to this phenomenon. The relationships among metals in different phases were different, and there were few close relationships among metals in the dissolved phase, many close relationships in the particulate phase, and more close relationships in the sedimentary phase. This finding may be related to the different mobility levels of metals in different phases.

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Section: Resultscontrasting

confidence: 62%

Spatial distribution and correlation characteristics of heavy metals in the seawater, suspended particulate matter and sediments in Zhanjiang Bay, China

et al. 2018

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“…El Río Sauce Chico, con una descarga media de 150.000 m 3 /día y el arroyo Napostá Grande, con una descarga media de 91.000 m 3 /día, son los principales tributarios de la red de drenaje de agua dulce superficial (Limbozzi & Leitao 2008). Adicionalmente, el EBB recibe otros aportes de agua dulce a través de escorrentía superficial, descargas cloacales y operaciones relacionadas al puerto (La Colla et al 2015). Los valores de salinidad media varían entre 32.83 y 33.98 psm en la zona interna del estuario (Freije & Marcovecchio 2004).…”

Section: áRea De Estudiounclassified

Distribution, vertical position and ecological implications of shallow gas in Bahía Blanca estuary (Argentina)

Bravo

Aliotta

Fiori

et al. 2018

Estuarine, Coastal and Shelf Science

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The aim of this thesis is to characterize the shallow gas deposits of the inner area of the Bahía Blanca estuary and to evaluate the effect of the gas-bearing sediments on the associated subtidal benthic communities. For this purpose, the distribution of shallow gas in the estuary was mapped through the analysis of highresolution seismic records. Based on this map, two study sites were selected (with gas and control) that only differed in the presence of gas in contact with the surface of the seabed. Acoustic methods were used to determine the stratigraphy and morphology of the site with gas and the adjacent area. In addition, the gas sediments were evaluated by means of the following analyses: grain size, organic matter content, X-rays and HPLC head space measurement. The benthic organisms of both sites were compared in terms of abundance, biomass, diversity, evenness, species richness, taxonomic and functional structure. The gas was found widely distributed in the estuary, both near and in contact with the surface of the seabed of the inner area of the Bahía Blanca estuary. It was evidenced in the form of acoustic turbidity and acoustic blanking. The seismo-stratigraphic column presented five seismic sequences of the late Pleistocene-Holocene. It was established that the gas origin is biogenic, being associated with a Middle Holocene deposit, from which it migrated until it was in contact with the surface of the seabed due to the permeability of the overlying strata. The gas in the surface of the seabed was evidenced in sonograms by means of the attenuation of the acoustic signal, which evidences a low cohesion Índice Dedicatoria…………………………………………………………………………………………………….I

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“…The northern coast of the estuary is subjected to high anthropogenic impact as a result of human settlement, commercial ports and chemical industries (Arias et al 2010;Botté et al 2010). Two cities are established adjacent to the estuary, Bahía Blanca (35,000 inhabitants) and Punta Alta (60,000 inhabitants), generating urban sewage discharges of almost 84000 m 3 / day that reach the estuary without appropriate treatment (CTE 2016;La Colla et al 2015). The port area of Bahía Blanca city, located in the inner zone of the estuary, requires periodic maintenance dredging; final sediment disposal is carried out in other areas of the estuary (Schnegelberger et al 2014).…”

Section: Study Areamentioning

confidence: 99%

“…The Bahía Blanca estuary, is one of the most urbanized and industrialized coastal areas of Argentina (Arias et al 2010;Biancalana et al 2012). Over the last three decades the estuary has suffered severe perturbations as a result of strong demographic expansion accompanied by growing industrial activity and cumulative organic pollution due to the dumping of untreated sewage (Botté et al 2007(Botté et al , 2010Marcovecchio et al 2008;La Colla et al 2015). Since the estuary is home to the most important deep-water port system of the country, it is also affected by the continuous need for maintenance and dredging operations to accommodate maritime traffic.…”

Section: Introductionmentioning

confidence: 99%

Efecto de los efluentes cloacales sobre el ensamble macrobentónico submareal en un estuario urbano de la Argentina

et al. 2020

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We examined spatial variations in the biological descriptors of macrobenthic assemblage in relation to environmental parameters and metal distribution in the sediments along a channel of Bahía Blanca estuary affected by non-treatment sewage effluents. Along the channel, metal concentration values were higher than those in the internal estuary area, a sector considered as a reference site. The highest values of water turbidity and metal content in sediments were observed in the effluent discharge zone and at the site where sediments from dredging activities were deposited two years ago. The density of macrobenthic assemblages decreased towards the effluent discharge zone, but the richness and diversity reached to minimum values in both disturbed areas. Only two species of polychaetes were associated with these areas: Laeonereis acuta and Aphelochaeta sp.; the former being found in the effluent discharge zone, where Cd and Pb were most abundant, and the latter being the dominant species in the site characterized by dredging material and high concentrations of Cr and Ni. This study is the first approach to explore the impact of anthropogenic activities over the macrobenthic assemblage of the Bahía Blanca estuary, providing background data to use future management decisions.

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Dissolved and particulate metals dynamics in a human impacted estuary from the SW Atlantic

Cited by 53 publications

References 55 publications

Spatial distribution and correlation characteristics of heavy metals in the seawater, suspended particulate matter and sediments in Zhanjiang Bay, China

Spatial distribution and correlation characteristics of heavy metals in the seawater, suspended particulate matter and sediments in Zhanjiang Bay, China

Distribution, vertical position and ecological implications of shallow gas in Bahía Blanca estuary (Argentina)

Efecto de los efluentes cloacales sobre el ensamble macrobentónico submareal en un estuario urbano de la Argentina

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