Iron assimilation by the clam Laternula elliptica from Potter Cove, King Georg Island, Antarctica ...

• Main Authors: Poigner, Harald, Wilhelms-Dick, Dorothee, Abele, Doris, Staubwasser, Michael, Henkel, Susann
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Event label; Sample code/label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Laternula elliptica, length of valve; Laternula elliptica, height of valve; Laternula elliptica, width of valve; Iron, haemolymph fluid and hemocytes; δ56Fe; Multiple investigations; Vernier caliper; ICP-OES after acid digestion Poigner et al, 2013; MC-ICP-MS after acid digestion, anion-exchange chromatography Schönberg, 2005; Impact of climate induced glacier melt on marine coastal systems, Antarctica IMCOAST/IMCONet; Antarctic; The Antarctic; King George Island; Potter Cove; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.846456; https://doi.pangaea.de/10.1594/PANGAEA.846456

Iron stable isotope signatures (d56Fe) in hemolymph (bivalve blood) of the Antarctic bivalve Laternula elliptica were analyzed by Multiple Collector-Inductively Coupled Plasma-Mass Spectrometry (MC-ICP-MS) to test whether the isotopic fingerprint can be tracked back to the predominant sources of the assimilated Fe. An earlier investigation of Fe concentrations in L. elliptica hemolymph suggested that an assimilation of reactive and bioavailable Fe (oxyhydr)oxide particles (i.e. ferrihydrite), precipitated from pore water Fe around the benthic boundary, is responsible for the high Fe concentration in L. elliptica (Poigner et al., 2013, doi:10.1016/j.ecss.2013.10.027).At two stations in Potter Cove (King George Island, Antarctica) bivalve hemolymph showed mean d56Fe values of -1.19 ± 0.34 per mil and -1.04 ± 0.39 per mil, respectively, which is between 0.5 per mil and 0.85 per mil lighter than the pool of easily reducible Fe (oxyhydr)oxides of the surface sediments (-0.3 per mil to -0.6 per mil). This is in ... : Supplement to: Poigner, Harald; Wilhelms-Dick, Dorothee; Abele, Doris; Staubwasser, Michael; Henkel, Susann (2015): Iron assimilation by the clam Laternula elliptica: Do stable isotopes (d56Fe) help to decipher the sources? Chemosphere, 134, 294-300 ...