Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon

Cochran, J. Kirk; Frignani, M.; Salamanca, Marco; Bellucci, Luca Giorgio; Guerzoni, Stefano

doi:10.1016/s0304-4203(98)00017-6

Cited by 99 publications

(50 citation statements)

References 17 publications

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“…Lake sediments have also shown that the impact of these smelting activities is primarily localized rather than regional [115]. The release of Ni from industrial areas into the environment in the 1970s/1980s, and the recent decline is well recorded in delta systems, such as that of the Danube [116] and the Venice lagoon [117]. The slight enrichment of Ni in recent sediment layers of the Culiacan river estuary in Northwestern Mexico was related to population growth [118].…”

Section: Sedimentmentioning

confidence: 99%

Biogeochemistry of Nickel and Its Release into the Environment

Nieminen

Ukonmaanaho

Rausch

et al. 2007

Nickel and Its Surprising Impact in Nature

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Section: Sedimentmentioning

confidence: 99%

Biogeochemistry of Nickel and Its Release into the Environment

Nieminen

Ukonmaanaho

Rausch

et al. 2007

Nickel and Its Surprising Impact in Nature

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“…Both of them are characterized by shallow waters whose chemical composition may be influenced by processes that perturb the physical and chemical partitioning of pollutants, such as the enhanced resuspension from sediments or the prevention of fine-size particle settling. All these processes have to be taken into account because they are important in the lagoon, in which average water depth is about 0.6 m and the tidal excursion is lower than 1 m (Cochran et al, 1998).…”

Section: Samplingmentioning

confidence: 99%

PCBs and PAHs in sea-surface microlayer and sub-surface water samples of the Venice Lagoon (Italy)

Manodori

Gambaro

Piazza

et al. 2006

Marine Pollution Bulletin

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Polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) are two classes of micropollutants intensively monitored and regulated due to their toxicity, persistency and wide diffusion. Their concentrations have been investigated in sea-microlayer (SML) and sub-surface water (SSW) samples collected at two sites of the Venice Lagoon, a fragile ecosystem highly influenced by industrial and anthropogenic emissions. The total P PCB concentration varies from 0.45 ng/l to 2

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“…Po according to Flynn (1968). Unsupported 210 Pb activities were determined from the total 210 Pb minus the asymptotic activity at depth, assumed to be in equilibrium with 226 Ra in the sediment (Appleby and Oldfield, 1978;Cochran et al, 1998;Lewis et al, 2002). Sedimentation and mass accumulation rates were calculated according to Christensen (1982) based on the general advectiondiffusion equation assuming an exponential sedimentation rate and bulk sediment density in the absence of mixing (Eq.…”

Section: Study Areamentioning

confidence: 99%

Fluctuations in export productivity over the last century from sediments of a southern Chilean fjord (44°S)

Sepúlveda

Pantoja

Hughen

et al. 2005

Estuarine, Coastal and Shelf Science

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Here we present the first reconstruction of changes in surface primary production during the last century from the Puyuhuapi fjord in southern Chile, using a variety of parameters (diatoms, biogenic silica, total organic carbon, chlorins, and proteins) as productivity proxies. Two sediment cores from the head and the center of the fjord were analyzed and compared to gain insights on past changes in productivity in these two different depositional environments. Higher sedimentation rates found at the head of the fjord result from the combination of a shallower water column and a restricted circulation by the occurrence of a sill. Additionally, sediment mixing depths estimated from 210 Pb data suggest that suboxic conditions may dominate the bottom water and the sediment-water interface in this location.Productivity of the Puyuhuapi fjord during the last century was characterized by a constant increase from the late 19 th century to the early 1980s, then decreased until the late-1990s, and then rose again to present-day values. The influence of rainfall on productivity was most noticeable during periods of low rainfall, which coincided with decreased overall productivity within the Puyuhuapi fjord.Simultaneous variations in productivity and rainfall in the study area suggest that marine productivity could respond to atmospheric-oceanic interactions at a local scale. At a regional scale, marine productivity of the area may be related to other large-scale processes such as the El Niño SouthernOscillation.4

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Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon

Cited by 99 publications

References 17 publications

Biogeochemistry of Nickel and Its Release into the Environment

Biogeochemistry of Nickel and Its Release into the Environment

PCBs and PAHs in sea-surface microlayer and sub-surface water samples of the Venice Lagoon (Italy)

Fluctuations in export productivity over the last century from sediments of a southern Chilean fjord (44°S)

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