@article{fdi:010090136,
  title = {{A}ssessing the bioavailability of black carbon-derived dissolved organic matter for marine heterotrophic prokaryotes + [{C}orrigendum, 2 p.]},
  author = {{M}artinot, {P}. {L}. and {G}uigue, {C}atherine and {C}hifflet, {S}andrine and {C}uny, {P}. and {B}arani, {A}. and {D}idry, {M}. and {D}ignan, {C}. and {G}uyomarc'h, {L}. and {P}radel, {N}athalie and {P}ringault, {O}livier and {V}an {W}ambeke, {F}. and {V}u, {C}. {T}. and {M}ari, {X}avier and {T}edetti, {M}arc},
  editor = {},
  language = {{ENG}},
  abstract = {{H}ere we investigated the bioavailability of black carbon ({BC})-derived dissolved organic matter ({DOM}) for a natural mixed community of marine heterotrophic prokaryotes. {W}e ran an in vitro biodegradation experiment that took place over 3 months and exposed a community of organisms collected in the northwestern {M}editerranean {S}ea ({B}ay of {M}arseille, {F}rance) to three different soluble fractions of {BC} prepared in the laboratory from various fossil fuel combustion particulates: standard diesel ({DREF}), oxidized diesel ({DREF}-{OX}), and natural samples of ship soot ({DSHIP}). {O}ver the course of the three months, we observed significant decreases in the concentrations of dissolved organic carbon ({DOC}; from 9 to 21 %), dissolved {BC} ({DBC}; from 22 to 38 %) and dissolved polycyclic aromatic hydrocarbons (d-{PAH}; from 24 to 64 %) along with variability in the growth dynamics and activity of the heterotrophic prokaryotic community. {T}he heterotrophic prokaryotic community exposed to {DREF}-{OX} treatment showed the highest values of respiration and production and the highest cell abundance, associated with the highest decrease in {DOC} (21 %) and d-{PAH} (64 %) concentrations. {I}n the {DREF} and {DSHIP} treatments, prokaryotic activity was oriented towards anabolism. {DREF} treatment led to the highest decrease in {DBC} concentration (38 %). {DSHIP} treatment, which presented a substantially different d-{PAH} and dissolved metals content to the other two treatments, showed the lowest decreases in {DOC}, {DBC} and d-{PAH} concentrations, as well as the lowest prokaryotic activity and biomasses. {O}ur results indicate that {BC}-derived {DOM}, including the most condensed fraction of this material, is partly bioavailable and therefore likely to be assimilated by marine prokaryotes. {T}he origin of {BC}/soot deposited at the ocean surface turns out to be a key parameter that dictates the efficiency of biodegradation of its dissolved fraction by heterotrophic prokaryotes.},
  keywords = {{B}lack carbon ; {S}oot ; {D}issolved organic matter ; {M}arine prokaryotes ; {B}ioavailability ; {B}acterial degradation ; {MEDITERRANEE} ; {FRANCE} ; {MARSEILLE}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {901},
  numero = {},
  pages = {165802 [18 ] [+ {C}orrigendum, vol. 904,  166251]},
  ISSN = {0048-9697},
  year = {2023},
  DOI = {10.1016/j.scitotenv.2023.165802},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090136},
}