@article{fdi:010037909,
  title = {{C}onsequences of respiration in the light on the determination of production in pelagic systems},
  author = {{P}ringault, {O}livier and {T}assas, {V}anessa and {R}ochelle {N}ewall, {E}mma},
  editor = {},
  language = {{ENG}},
  abstract = {{O}xygen microprobes were used to estimate {C}ommunity {R}espiration ({R}), {N}et {C}ommunity {P}roduction ({NCP}) and {G}ross {P}rimary {P}roduction ({GPP}) in coastal seawater samples. {U}sing this highly stable and reproducible technique to measure oxygen change during alternating dark and light periods, we show that respiration in the light could account for up to 640% of respiration in the dark. {T}he light enhanced dark respiration can remain elevated for several hours following a 12 h period of illumination. {N}ot including {R}-light into calculations of production leads to an underestimation of {GPP}, which can reach up to 650% in net heterotrophic systems. {T}he production: respiration ({P}:{R}) ratio is in turn affected by the higher respiration rates and by the underestimation of {GPP}. {W}hile the integration of {R}light into the calculation of {P}:{R} ratio does not change the metabolic balance of the system, it decreases the observed tendency, thus net autotrophic systems become less autotrophic and net heterotrophic systems become less heterotrophic. {A}s a consequence, we propose that efforts have to be focused on the estimation and the integration of {R}light into the determination of {GPP} and {R} for a better understanding of the aquatic carbon cycle.},
  keywords = {},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {4},
  numero = {1},
  pages = {105--114},
  ISSN = {1726-4170},
  year = {2007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037909},
}