In:
PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 4 ( 2021-4-30), p. e0245605-
Kurzfassung:
Acesta excavata (Fabricius, 1779) is a slow growing bivalve from the Limidae family and is often found associated with cold-water coral reefs along the European continental margin. Here we present the compositional variability of frequently used proxy elemental ratios (Mg/Ca, Sr/Ca, Na/Ca) measured by laser-ablation mass spectrometry (LA-ICP-MS) and compare it to in-situ recorded instrumental seawater parameters such as temperature and salinity. Shell Mg/Ca measured in the fibrous calcitic shell section was overall not correlated with seawater temperature or salinity; however, some samples show significant correlations with temperature with a sensitivity that was found to be unusually high in comparison to other marine organisms. Mg/Ca and Sr/Ca measured in the fibrous calcitic shell section display significant negative correlations with the linear extension rate of the shell, which indicates strong vital effects in these bivalves. Multiple linear regression analysis indicates that up to 79% of elemental variability is explicable with temperature and salinity as independent predictor values. Yet, the overall results clearly show that the application of Element/Ca (E/Ca) ratios in these bivalves to reconstruct past changes in temperature and salinity is likely to be complicated due to strong vital effects and the effects of organic material embedded in the shell. Therefore, we suggest to apply additional techniques, such as clumped isotopes, in order to exactly determine and quantify the underlying vital effects and possibly account for these. We found differences in the chemical composition between the two calcitic shell layers that are possibly explainable through differences of the crystal morphology. Sr/Ca ratios also appear to be partly controlled by the amount of magnesium, because the small magnesium ions bend the crystal lattice which increases the space for strontium incorporation. Oxidative cleaning with H 2 O 2 did not significantly change the Mg/Ca and Sr/Ca composition of the shell. Na/Ca ratios decreased after the oxidative cleaning, which is most likely a leaching effect and not caused by the removal of organic matter.
Materialart:
Online-Ressource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0245605
DOI:
10.1371/journal.pone.0245605.g001
DOI:
10.1371/journal.pone.0245605.g002
DOI:
10.1371/journal.pone.0245605.g003
DOI:
10.1371/journal.pone.0245605.g004
DOI:
10.1371/journal.pone.0245605.g005
DOI:
10.1371/journal.pone.0245605.g006
DOI:
10.1371/journal.pone.0245605.g007
DOI:
10.1371/journal.pone.0245605.t001
DOI:
10.1371/journal.pone.0245605.t002
DOI:
10.1371/journal.pone.0245605.t003
DOI:
10.1371/journal.pone.0245605.t004
DOI:
10.1371/journal.pone.0245605.t005
DOI:
10.1371/journal.pone.0245605.t006
DOI:
10.1371/journal.pone.0245605.s001
DOI:
10.1371/journal.pone.0245605.s002
DOI:
10.1371/journal.pone.0245605.s003
DOI:
10.1371/journal.pone.0245605.s004
DOI:
10.1371/journal.pone.0245605.s005
DOI:
10.1371/journal.pone.0245605.s006
DOI:
10.1371/journal.pone.0245605.s007
DOI:
10.1371/journal.pone.0245605.s008
DOI:
10.1371/journal.pone.0245605.s009
DOI:
10.1371/journal.pone.0245605.s010
DOI:
10.1371/journal.pone.0245605.s011
DOI:
10.1371/journal.pone.0245605.r001
DOI:
10.1371/journal.pone.0245605.r002
DOI:
10.1371/journal.pone.0245605.r003
DOI:
10.1371/journal.pone.0245605.r004
DOI:
10.1371/journal.pone.0245605.r005
DOI:
10.1371/journal.pone.0245605.r006
DOI:
10.1371/journal.pone.0245605.r007
Sprache:
Englisch
Verlag:
Public Library of Science (PLoS)
Publikationsdatum:
2021
ZDB Id:
2267670-3