@article{fdi:010040800,
  title = {{C}orrespondence between the distribution of hydrodynamic time parameters and the distribution of biological and chemical variables in a semi-enclosed coral reef lagoon},
  author = {{T}orr{\'e}ton, {J}ean-{P}ascal and {R}ochelle {N}ewall, {E}mma and {J}ouon, {A}ymeric and {F}aure, {V}incent and {J}acquet, {S}{\'e}verine and {D}ouillet, {P}ascal},
  editor = {},
  language = {{ENG}},
  abstract = {{H}ydrodynamic modeling can be used to spatially characterize water renewal rates in coastal ecosystems. {U}sing a hydrodynamic model implemented over the semi-enclosed {S}outhwest coral lagoon of {N}ew {C}aledonia, a recent study computed the flushing lag as the minimum time required for a particle coming from outside the lagoon (open ocean) to reach a specific station [{J}ouon, {A}., {D}ouillet, {P}., {O}uillon, {S}., {F}raunie, {P}., 2006. {C}alculations of hydrodynamic time parameters in a semi-opened coastal zone using a 3{D} hydrodynamic model. {C}ontinental {S}helf {R}esearch 26, 1395-1415]. {L}ocal e-flushing time was calculated as the time requested to reach a local grid mesh concentration of 1/e from the precedent step. {H}ere we present an attempt to connect physical forcing to biogeochemical functioning of this coastal ecosystem. {A}n array of stations, located in the lagoonal channel as well as in several bays under anthropogenic influence, was sampled during three cruises. {W}e then tested the statistical relationships between the distribution of flushing indices and those of biological and chemical variables. {A}mong the variables tested, silicate, chlorophyll a and bacterial biomass production present the highest correlations with flushing indices. {C}orrelations are higher with local e-flushing times than with flushing lags or the sum of these two indices. {I}n the bays, these variables often deviate from the relationships determined in the main lagoon channel. {I}n the three bays receiving significant riverine inputs, silicate is well above the regression line, whereas data from the bay receiving almost insignificant freshwater inputs generally fit the lagoon channel regressions. {M}oreover, in the three bays receiving important urban and industrial effluents, chlorophyll a and bacterial production of biomass generally display values exceeding the lagoon channel regression trends whereas in the bay under moderate anthropogenic influence values follow the regressions obtained in the lagoon channel. {T}he {S}outh {W}est lagoon of {N}ew {C}aledonia can hence be viewed as a coastal mesotrophic ecosystem that is flushed by oligotrophic oceanic waters which subsequently replace the lagoonal waters with water considerably impoverished in resources for microbial growth. {T}his flushing was high enough during the periods of study to influence the distribution of phytoplankton biomass, bacterial production of biomass and silicate concentrations in the lagoon channel as well as in some of the bay areas.},
  keywords = {hydrodynamics ; flushing time ; plankton ; secondary production ; nutrients ; coastal lagoon ; {P}acific ; {N}ew {C}aledonia},
  booktitle = {},
  journal = {{E}stuarine {C}oastal and {S}helf {S}cience},
  volume = {74},
  numero = {4},
  pages = {766--776},
  ISSN = {0272-7714},
  year = {2007},
  DOI = {10.1016/j.ecss.2007.05.018},
  URL = {https://www.documentation.ird.fr/hor/fdi:010040800},
}