@article{fdi:010053635,
  title = {{T}rophic interactions between viruses, bacteria and nanoflagellates under various nutrient conditions and simulated climate change},
  author = {{B}ouvy, {M}arc and {B}ettarel, {Y}van and {B}ouvier, {C}. and {D}omaizon, {I}. and {J}acquet, {S}. and {L}e {F}loc'h, {E}. and {M}ontanie, {H}. and {M}ostajir, {B}. and {S}ime-{N}gando, {T}. and {T}orr{\'e}ton, {J}ean-{P}ascal and {V}idussi, {F}. and {B}ouvier, {T}hierry},
  editor = {},
  language = {{ENG}},
  abstract = {{P}opulation dynamics in the microbial food web are influenced by resource availability and predator/parasitism activities. {C}limatic changes, such as an increase in temperature and/or {UV} radiation, can also modify ecological systems in many ways. {A} series of enclosure experiments was conducted using natural microbial communities from a {M}editerranean lagoon to assess the response of microbial communities to top-down control [grazing by heterotrophic nanoflagellates ({HNF}), viral lysis] and bottom-up control (nutrients) under various simulated climatic conditions (temperature and {UV}-{B} radiations). {D}ifferent biological assemblages were obtained by separating bacteria and viruses from {HNF} by size fractionation which were then incubated in whirl-{P}ak bags exposed to an increase of 3 {C} and 20% {UV}-{B} above the control conditions for 96 h. {T}he assemblages were also provided with an inorganic and organic nutrient supply. {T}he data show (i) a clear nutrient limitation of bacterial growth under all simulated climatic conditions in the absence of {HNF}, (ii) a great impact of {HNF} grazing on bacteria irrespective of the nutrient conditions and the simulated climatic conditions, (iii) a significant decrease in burst size ({BS}) (number of intracellular lytic viruses per bacterium) and a significant increase of {VBR} (virus to bacterium ratio) in the presence of {HNF}, and (iv) a much larger temperature effect than {UV}-{B} radiation effect on the bacterial dynamics. {T}hese results show that top-down factors, essentially {HNF} grazing, control the dynamics of the lagoon bacterioplankton assemblage and that short-term simulated climate changes are only a secondary effect controlling microbial processes.},
  keywords = {},
  booktitle = {},
  journal = {{E}nvironmental {M}icrobiology},
  volume = {13},
  numero = {7},
  pages = {1842--1857},
  ISSN = {1462-2912},
  year = {2011},
  DOI = {10.1111/j.1462-2920.2011.02498.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053635},
}