@article{fdi:010064488,
  title = {{W}ater residence time : {A} regulatory factor of the {DOM} to {POM} transfer efficiency},
  author = {{M}ari, {X}avier and {R}ochelle {N}ewall, {E}mma and {T}orr{\'e}ton, {J}ean-{P}ascal and {P}ringault, {O}livier and {J}ouon, {A}ymeric and {M}igon, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he pools of dissolved ({DOM}) and particulate organic matter ({POM}) and of transparent exopolymeric particles ({TEP}) were studied along two sampling gradients in the lagoon of {N}ew {C}aledonia in relation to the residence time of the water masses. {T}he efficiency of the transfer of material from the dissolved to the particulate phase via {TEP} formation, indicating the physicochemical reactivity of organic matter, was investigated. {DOM}, {POM}, and {TEP} concentration increased along the sampling gradients, but their relative proportions varied. {T}he contribution of the {TEP} pool to {POM} increased from 20% to 60%, from the most oligotrophic stations to the more anthropogenically affected bays. {A}ccording to the low density of {TEP} and to the observed variations of the proportion of {TEP} compared with more conventional and solid particles, the aggregates formed inside the bays would be either neutrally or positively buoyant, whereas in the vicinity of the coral barrier, they would be negatively buoyant. {A}s a result, the downward export of organic matter inside the bays might be greatly reduced, thereby prolonging the residence time of organic matter in the water column. {T}he efficiency of the {DOM}/{TEP} transformation and the {TEP} turnover rate dropped drastically when the residence time increased from 0 to 50 d, suggesting that the reactivity of organic matter is reduced as it ages. {T}he very high residence time of the water mass inside the bays, constrained by the hydrodynamic circulation inside the lagoon, favors the installation of a feedback system in which organic matter is not exported and is continuously degraded, leading to the formation of refractory {DOM} with a low physicochemical reactivity. {I}n contrast, organic matter produced in areas in which water mass has a low residence time (i.e., near the coral barrier) is rapidly exported because of its high physicochernical reactivity.},
  keywords = {},
  booktitle = {},
  journal = {{L}imnology and {O}ceanography},
  volume = {52},
  numero = {2},
  pages = {808--819},
  ISSN = {0024-3590},
  year = {2007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064488},
}