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?
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椭圆蛤对铁的同化:稳定同位素 (δFe) 是否有助于破译来源?
DOI:
10.1016/j.chemosphere.2015.04.067
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发表时间:
2015
期刊:
影响因子:
8.8
通讯作者:
S. Henkel
中科院分区:
文献类型:
--
作者:
Poigner;D. Wilhelms-Dick;D. Abele;M. Staubwasser;S. Henkel
Iron stable isotope signatures (δ56Fe) in hemolymph (bivalve blood) of the Antarctic bivalveLaternula ellipticawere 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 inL. ellipticahemolymph 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 inL. elliptica(Poigner et al., 2013b).At two stations in Potter Cove (King George Island, Antarctica) bivalve hemolymph showed mean δ56Fe values of −1.19 ± 0.34‰ and −1.04 ± 0.39‰, respectively, which is between 0.5‰ and 0.85‰ lighter than the pool of easily reducible Fe (oxyhydr)oxides of the surface sediments (−0.3‰ to −0.6‰). This is in agreement with the enrichment of lighter Fe isotopes at higher trophic levels, resulting from the preferential assimilation of light isotopes from nutrition. Nevertheless, δ56Fe hemolymph values from both stations showed a high variability, ranging between −0.21‰ (value close to unaltered/primary Fe(oxyhydr)oxide minerals) and −1.91‰ (typical for pore water Fe or diagenetic Fe precipitates), which we interpret as a “mixed” δ56Fe signature caused by Fe assimilation from different sources with varying Fe contents and δ56Fe values. Furthermore, mass dependent Fe fractionation related to physiological processes within the bivalve cannot be ruled out.This is the first study addressing the potential of Fe isotopes for tracing back food sources of bivalves.
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影响因子:
1.2
作者:
Gerald R. Dickens;Martin Koelling;David C. Smith;Lu�ie Schnieders
通讯作者:
Gerald R. Dickens;Martin Koelling;David C. Smith;Lu�ie Schnieders
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
A. Heinemann;J. Fietzke;A. Eisenhauer;K. Zumholz
通讯作者:
K. Zumholz
影响因子:
4.9
作者:
M. Staubwasser;R. Schoenberg;F. Blanckenburg;S. Krüger;C. Pohl
通讯作者:
M. Staubwasser;R. Schoenberg;F. Blanckenburg;S. Krüger;C. Pohl
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Harald Poigner;P. Monien;Donata Monien;M. Kriews;H. Brumsack;Dorothee Wilhelms‐Dick;D. Abele
通讯作者:
D. Abele
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
S. Henkel;S. Kasten;H. Sala;A. S. Busso;M. Staubwasser
通讯作者:
M. Staubwasser