@article{fdi:010066716,
  title = {{E}ffect of trace metal-limited growth on the postmortem dissolution of the marine diatom {P}seudo-nitzschia delicatissima},
  author = {{B}outorh, {J}. and {M}oriceau, {B}. and {G}allinari, {M}. and {R}agueneau, {O}livier and {B}ucciarelli, {E}va},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigated the effects of iron ({F}e) and copper ({C}u) limitations on biogenic silica (b{S}i{O}(2)) dissolution kinetics of the marine diatom {P}seudo-nitzschia delicatissima during a 3 week batch dissolution experiment. {T}he dissolution of this species was faster during the first week than thereafter. {M}odeling results from four dissolution models and scanning electron microcopy images suggested the successive dissolution of two phases of b{S}i{O}(2), with two different dissolution constants. {M}icronutrient limitation during growth affected the respective proportion of the two phases and their dissolution constants. {A}fter 3 weeks of dissolution, frustules from micronutrient-limited diatoms were better preserved than those of replete cells. {O}ur results also confirm that micronutrient-limited cells may export more {S}i relative to {N} than replete cells and may increase the silicate pump: {T}his may not only be due to a higher degree of silicification of the live cells but also to a decoupling between the recycling of {S}i and {N} during dissolution. {W}e suggest that a mechanistic understanding of the evolution of the dissolution constant during dissolution is needed. {T}his would improve the parameterization of dissolution in ecosystem models, and ultimately their predictions on the amount of b{S}i{O}(2) that dissolves in the photic zone, and the amount of b{S}i{O}(2) that is exported to the seafloor.},
  keywords = {},
  booktitle = {},
  journal = {{G}lobal {B}iogeochemical {C}ycles},
  volume = {30},
  numero = {1},
  pages = {57--69},
  ISSN = {0886-6236},
  year = {2016},
  DOI = {10.1002/2015gb005088},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066716},
}