@article{fdi:010042770,
  title = {{S}ynchronous barium peaks in high-resolution profiles of calcite and aragonite marine bivalve shells},
  author = {{G}illikin, {D}. {P}. and {L}orrain, {A}nne and {P}aulet, {Y}. {M}. and {A}ndr{\'e}, {L}. and {D}ehairs, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}arium/calcium profiles of bivalve shells are characterized by flat background signals periodically interrupted by sharp peaks, with the background signals correlated with water {B}a/{C}a. {T}o test if the peaks are an environmental signal related to productivity, we analyzed high-resolution {B}a/{C}a profiles in bivalve shells that grew adjacent to one another. {T}wo aragonitic {S}axidomus giganteus show remarkable similarity over a decade of growth, clearly indicating an environmental forcing. {F}our calcitic {P}ecten maximus shells also record synchronous {B}a/{C}a peaks, again indicating an exogenous control. {T}he {B}a/{C}a peaks, however, start similar to 40 days after the crash of a bloom, while sedimentation takes place immediately following the bloom. {B}arite formation in settling phytoplankton flocs, as has been previously proposed, is clearly not the cause of these peaks. {O}ther possible causes, such as dissolved {B}a in ambient water, spawning, shell organic matter content, and kinetic growth rate effects are also discussed, but none provide satisfactory explanations. {B}ackground shell {B}a partition coefficients ({B}a/{C}a-carbonate/{B}a/{C}a-water) for both the calcitic shells (0.18) and aragonitic shells (0.16) are similar to that previously reported for the calcitic {M}ytilus edulis (similar to 0.1). {W}e suggest that {B}a/{C}a peaks in bivalve shells are caused by an as yet undetermined environmental forcing, while background {B}a/{C}a levels are a good indication of dissolved {B}a/{C}a in the water; both are independent of shell mineralogy.},
  keywords = {},
  booktitle = {},
  journal = {{G}eo-{M}arine {L}etters},
  volume = {28},
  numero = {5-6},
  pages = {351--358},
  ISSN = {0276-0460},
  year = {2008},
  DOI = {10.1007/s00367-008-0111-9},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042770},
}