Influence of the porewater geochemistry on Fe and Mn assimilation in Laternula elliptica at King George Island (Antarctica)

Poigner, Harald; Monien, Patrick; Monien, Donata; Kriews, Michael; Brumsack, Hans‐Jürgen; Wilhelms-Dick, Dorothee; Abele, Doris

doi:10.1016/j.ecss.2013.10.027

Cited by 11 publications

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“…Lighter Fe isotopes become enriched at higher trophic levels (Zhu et al, 2002) due to the preferential assimilation Fe hemolymph values suggest a Fe assimilation from 54 Fe-enriched reactive and bioavailable particles from the benthic boundary layer or pore water. Poigner et al (2013b) proposed such particles as main Fe source for L. elliptica based on the high Fe concentrations in bivalve hemolmyph and the fast response of Fe concentrations in hemolymph to environmental (bioavailable) Fe concentrations. (Note, that iron was provided experimentally as dissolved Fe:EDTA complex to ensure constant and reproducible conditions.)…”

Section: Discussionmentioning

confidence: 99%

“…This would, however, be important to understand environmental impact, including sources of contamination in marine bivalve populations, and also the biogeochemical processes that render environmental metals/contaminants as ''bioavailable''. Tissue specific Fe-contents in the circum-Antarctic clam Laternula elliptica (King and Broderip, 1832) vary considerably between sampling sites around the Antarctic continent (Ahn et al, 1996;Nigro et al, 1997;Lohan et al, 2001;Deheyn et al, 2005;Curtosi et al, 2010;Husmann et al, 2012;Poigner et al, 2013b). Highest contents were found at Deception Island where hydrothermal waters release high loads of dissolved Fe into the environment (Rey et al, 1995;Deheyn et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Abele et al, 2008;Curtosi et al, 2010;Husmann et al, 2012). Alternatively, Poigner et al (2013b) propose bioavailable Fe (oxyhydr)oxides, in particular ferrihydrite that precipitates from sediment pore water Fe 2+ , as predominant…”

Section: Introductionmentioning

confidence: 99%

“…Hence, hemolymph is not only regarded as the organ of first storage but, due to the subsequent binding of Fe ions to organic ligands (e.g., enzymes and other proteins; Simkiss and Mason, 1983;Gonzalez et al, 2010;Gonzalez and Puntarulo, 2011), it is further of particular importance for the metal transport from assimilation sites to sites of excretion (Simkiss and Mason, 1983;Kadar et al, 2010). However, a few studies found a linear relationship of Fe concentrations in hemolymph of L. elliptica (Poigner et al, 2013b) and tissues of Mytilus edulis (George et al, 1976;George and Coombs, 1977) …”

Section: Introductionmentioning

confidence: 99%

“…L. elliptica also expresses the Fe storage protein ferritin in several tissues (digestive gland, gill, foot) as well as in hemocyte cells in large quantities (Husmann, 2013). On average 30% of total Fe within the hemolymph 1 are bound in hemocyte cells (Poigner et al, 2013b) and digestive gland and gills show higher Fe contents (Husmann et al, 2012;Poigner et al, 2013a) compared to tissues of lower ferritin expression (e.g., siphon, mantle; liver was not investigated; Husmann et al, 2012;Husmann, 2013;Poigner et al, 2013a). Nevertheless, the Fe turnover is considerably faster in L. elliptica compared to humans, since Poigner et al (2013b) (Henkel et al, 2013;Monien et al, 2013), and (iii) the conformity of averaged d 56 Fe values in bivalves hemolymph (À1.1‰) and the reactive Fe fraction in surface sediments (À0.25 ± 0.12‰ and À0.56 ± 0.10‰; S. Henkel, unpublished data) to the preferred assimilation of lighter isotopes along the food chain.…”

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Iron assimilation by the clam Laternula elliptica: Do stable isotopes (δ56Fe) help to decipher the sources?

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Iron assimilation by the clam Laternula elliptica: Do stable isotopes (δ56Fe) help to decipher the sources?

et al. 2015

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How Important Is Research on Pollution Levels in Antarctica? Historical Approach, Difficulties and Current Trends

Szopińska

Namieśnik

Polkowska

2016

Reviews of Environmental Contamination and Toxicology

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Despite the fact that Antarctica is a continent notably free from large negative impact of human activities, literature data can be the basis for concluding that this is not an area free from anthropogenic pollutants. Pollutants, which are identified in various elements of the environment of Antarctica, are mostly connected with long-range atmospheric transport (LRAT) and deposition in this area. The study presents: a historical overview of research pertaining to the presence of pollutants in entire Antarctica; a description of the development of research on pollutants in various environmental samples conducted in this area since 1960; a detailed description of contemporary analytical research (2000-2014); information on concentration levels of a broad range of pollutants present in various elements of the environment. The data collected can provide grounds for concluding that pollutants present in this area can contribute to gradual degradation of Antarctic ecosystem.

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Manganese in the shell of the bivalve Mytilus edulis: Seawater Mn or physiological control?

Clarke

Kennedy

Richardson

2016

Geochimica et Cosmochimica Acta

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Manganese in the shell calcite of marine bivalves has been suggested to reflect ambient seawater Mn concentrations, thus providing a high-resolution archive of past seawater Mn concentrations. However, a quantitative relationship between seawater Mn and shell Mn/Ca ratios, as well as clear understanding of which process(es) control(s) shell Mn/Ca, are still lacking. Blue mussels, Mytilus edulis, were grown in a one-year duration field experiment in the Menai Strait, U.K., to study the relationship between seawater particulate and dissolved Mn 2+ concentrations and shell calcite Mn/Ca ratios. Shell Mn/Ca showed a well-defined intra-annual double-peak, with maximum values during early spring and early summer and low values during autumn and winter. Seawater particulate Mn peaked during winter and autumn, with a series of smaller peaks during spring and summer, whereas dissolved Mn 2+ exhibited a marked single maximum during late-spring to early-summer, being low during the remainder of the year. Consequently, neither seawater particulate Mn nor dissolved Mn 2+ concentrations explain the intra-annual variation of shell Mn/Ca ratios. A physiological control on shell Mn/Ca ratios is evident from the strong similarity and timing of the double-peaked intra-annual variations of Mn/Ca and shell growth rate (SGR), the latter corresponding to periods of increased metabolic activity (as indicated by respiration rate). It is thus likely that in M. edulis SGR influences shell Mn/Ca by altering the concentration or activity of Mn 2+ within the extra-pallial fluid (EPF), by changing the flux of Mn into or the proportion of protein bound Mn within the EPF. By linking shell Mn/Ca ratios to the endogenous and environmental factors that determine growth and metabolic activity, this study helps to explain the lack of a consistent relationship between shell Mn/Ca in marine bivalve shell calcite and seawater particulate and dissolved Mn 2+ concentrations. The use of Mn content from M. edulis shell calcite as a proxy for the dissolved and/or particulate Mn concentrations, and thus the biogeochemical processes that control them, remains elusive.

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Influence of the porewater geochemistry on Fe and Mn assimilation in Laternula elliptica at King George Island (Antarctica)

Cited by 11 publications

References 87 publications

Iron assimilation by the clam Laternula elliptica: Do stable isotopes (δ56Fe) help to decipher the sources?

Iron assimilation by the clam Laternula elliptica: Do stable isotopes (δ56Fe) help to decipher the sources?

How Important Is Research on Pollution Levels in Antarctica? Historical Approach, Difficulties and Current Trends

Manganese in the shell of the bivalve Mytilus edulis: Seawater Mn or physiological control?

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