Monitoring of Organic Compounds and Trace Metals During a Dredging Episode in the Göta Älv Estuary (SW Sweden) Using Caged Mussels

Bellas, Juan; Ekelund, Rolf; Halldórsson, Halldór Pálmar; Berggren, Martin; Granmo, Åke

doi:10.1007/s11270-006-9298-4

Cited by 33 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bloom and Lasorsa (1999) examined MeHg concentrations in the water column above dredge spoil and found that both mechanisms probably contributed to elevated Hg concentrations. In one of the only studies to examine Hg concentrations in biota after anthropogenic sediment disturbance, Bellas et al (2007) hypothesized that Hg in caged filter-feeding mussels was elevated after dredging due to mobilization of bioavailable Hg to the water column. Studies are needed to determine whether MeHg concentrations are higher in the sediment and water column of trawled GOM areas than in nontrawled areas.…”

Section: Discussionmentioning

confidence: 99%

Effect of Trawling and Habitat on Mercury Concentration in Juvenile Red Snapper from the Northern Gulf of Mexico

2008

View full text Add to dashboard Cite

We evaluated mercury (Hg) contamination in juvenile red snapper Lutjanus campechanus (<250 mm total length) as an indicator of Hg pollution on the northern Gulf of Mexico (GOM) continental shelf. Specifically, we examined the effects of fish size, commercial shrimp trawling, and habitat type on total Hg concentrations and stable nitrogen isotope ratios (δ15N; a proxy for trophic position) in red snapper. Red snapper Hg concentrations and δ15N values were positively and significantly correlated with fish size. In addition, red snapper collected over trawled habitats had significantly higher Hg concentrations and δ15N values than did red snapper collected from similar, nontrawled habitats. Red snapper also exhibited habitat‐specific differences in Hg concentrations and δ15N values, but differences were size dependent and generally small. Our study suggests that the Hg concentrations of juvenile red snapper in the northern GOM are elevated in areas where commercial shrimp trawling occurs, possibly due to increases in both red snapper trophic position and bioavailable Hg in trawled areas. Additional studies are needed to determine whether Hg concentrations are elevated in fish from trawled areas in other marine ecosystems.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Trawling and Habitat on Mercury Concentration in Juvenile Red Snapper from the Northern Gulf of Mexico

2008

View full text Add to dashboard Cite

show abstract

“…A special monitoring program for the experiment, ordered as a condition for carrying out the experiment, measured any changes in the benthic fauna community and environmental impact of pollution expressed as bioaccumulation of contaminants in caged deployed common mussels ( Mytilus edulis L.) (Nelson 1990 ; Granmo 2004 ; Bellas et al 2007 ; Magnusson et al 2011 ). In addition, passive samplers, SPMD-semipermeable membrane devices ( http://www.est-lab.com ), and DGT—diffusive gels in thin films (Davison and Zhang 1994 ) were deployed in the anoxic deepwater 2–4 m above the bottom before start and during the oxygenation process.…”

Section: Methodsmentioning

confidence: 99%

An Experiment with Forced Oxygenation of the Deepwater of the Anoxic By Fjord, Western Sweden

Stigebrandt

Liljebladh

Brabandere

et al. 2014

AMBIO

Self Cite

View full text Add to dashboard Cite

In a 2.5-year-long environmental engineering experiment in the By Fjord, surface water was pumped into the deepwater where the frequency of deepwater renewals increased by a factor of 10. During the experiment, the deepwater became long-term oxic, and nitrate became the dominating dissolved inorganic nitrogen component. The amount of phosphate in the water column decreased by a factor of 5 due to the increase in flushing and reduction in the leakage of phosphate from the sediments when the sediment surface became oxidized. Oxygenation of the sediments did not increase the leakage of toxic metals and organic pollutants. The bacterial community was the first to show changes after the oxygenation, with aerobic bacteria also thriving in the deepwater. The earlier azoic deepwater bottom sediments were colonized by animals. No structural difference between the phytoplankton communities in the By Fjord and the adjacent Havsten Fjord, with oxygenated deepwater, could be detected during the experiment.Electronic supplementary materialThe online version of this article (doi:10.1007/s13280-014-0524-9) contains supplementary material, which is available to authorized users.

show abstract

“…By comparing the correlation among HMs in seawater and sediment of various seasons, this significant and positive correlation can indicate that the source of their changes is somewhat the same. One of the influencing factors on the concentration of HMs in sediments is the presence of suspended and organic matters in seawater [41,50].…”

Section: Seasonal Correlation Of Hm Concentrationmentioning

confidence: 99%

Spatial-seasonal variations and ecological risk of heavy metals in Persian gulf coastal region: case study of Iran

Mirzaei

Hatami-manesh

Haghshenas

et al. 2020

J Environ Health Sci Engineer

View full text Add to dashboard Cite

Purpose This study aimed to perform a systematic review to analyse the seasonal concentration and ecological risk assessment of heavy metals (HMs) in seawater and sediment samples collected from the coastline of Jam city in Bushehr, Iran. Methods A total of 96 sediment and seawater samples were collected from 16 sampling stations during the spring, summer, autumn, and winter of 2017. Then, the concentrations of Pb, Ni, Cd, Cr, Cu, Zn, and Fe were determined. Finally, the pollution load index (PLI), ecological risk (Er), and environmental risk (RI) were calculated to assess the HM ecological risk. ResultsThe results showed that the mean concentrations of HMs were lower than the maximum acceptable concentration by SQG and NOAA. In addition, the PLI assessed a low pollution load level in the region. The ER and RI results also showed that the region was at low risk, and the metal risk was classified as Cd > Cu > Pb > Ni > Zn > Cr. In some samples, the mean concentrations of HM were found to be higher with a statistically significant difference (P˂0.05). The results also showed that sediments were engaging in a moderate Er by Cd. Conclusions Generally, the rapid growth of urbanization, as well as industrial and human activities, along this coastline and area has increased the pollutants dumped into the seawater and sediments. Thus, it is necessary to take regular monitoring programs and develop better management strategies to minimize the amount of HMs entering into this coastal area.

show abstract

Monitoring of Organic Compounds and Trace Metals During a Dredging Episode in the Göta Älv Estuary (SW Sweden) Using Caged Mussels

Cited by 33 publications

References 46 publications

Effect of Trawling and Habitat on Mercury Concentration in Juvenile Red Snapper from the Northern Gulf of Mexico

Effect of Trawling and Habitat on Mercury Concentration in Juvenile Red Snapper from the Northern Gulf of Mexico

An Experiment with Forced Oxygenation of the Deepwater of the Anoxic By Fjord, Western Sweden

Spatial-seasonal variations and ecological risk of heavy metals in Persian gulf coastal region: case study of Iran

Contact Info

Product

Resources

About