@article{fdi:010091836,
  title = {{A}rtificial cold-adapted microbial mats cultured from {A}ntarctic lake samples. 2. : short-term temperature effects on oxygen turn-over},
  author = {{P}ringault, {O}livier and {B}uffan-{D}ubau, {E} and {D}e {W}it, {R}},
  editor = {},
  language = {{ENG}},
  abstract = {{S}hort-term temperature effects on oxygen turn-over in artificial cold-adapted microbial mats were experimentally studied using microsensor techniques. {T}he artificial mats were cultured in benthic gradient chambers under opposing oxygen and sulphide gradients, and community metabolism was analysed after 8 mo of incubation at 5°{C}. {M}icrobial mat samples from {L}ake {F}ryxell ({A}ntarctica) were used as inocula. {B}oth net and gross {O}2 productivity were maximal at 10°{C}, whereas gross {O}2 production was completely inhibited at 15°{C}. {T}hus, the microbial community exhibited a psychrophilic response. {N}evertheless, the inhibition of oxygenic photosynthesis at 15°{C} might result from indirect effects of accumulation of {H}2{S} in the photic zone, which might induce the inhibition of photosystem {II} activity. {T}he dynamics of the dark and light net metabolism of {O}2 were estimated from transient oxygen profiles. {T}hey were strongly affected by the temperature changes, exhibiting temperature characteristics well above those calculated from the steady-state approaches. {T}his indicates that indirect effects of temperature probably occurred, i.e. (1) migration of microorganisms locally resulting in higher biomass, (2) an increase of the oxygen requirements for the oxidation of reduced compounds such as {H}2{S}, or both. {T}he results show that the metabolic rates of the different functional groups in these artificial microbial mats were fine-tuned to the prevailing temperature. {T}his resulted in a close coupling of oxygen and sulphur cycles as has been previously found for mesophilic hypersaline mats.},
  keywords = {{ANTARCTIQUE} ; {FRYXELL} {LAC} ; {VICTORIA} {TERRE}},
  booktitle = {},
  journal = {{A}quatic {M}icrobial {E}cology},
  volume = {26},
  numero = {},
  pages = {127--138},
  ISSN = {0948-3055},
  year = {2001},
  DOI = {10.3354/ame026127},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091836},
}