@article{fdi:010075122,
  title = {{U}ltra-violet radiation has a limited impact on seasonal differences in the {A}cropora muricata holobiont},
  author = {van de {W}ater, {J}ajm and {C}ourtial, {L}. and {H}oulbr{\`e}que, {F}anny and {J}acquet, {S}. and {F}errier-{P}ages, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}nvironmental conditions are known to influence corals and their associated communities of microorganisms. {H}owever, our insights into the impacts of seasonal changes in ultraviolet radiation ({UVR}) on both coral physiology and microbiome remain very limited. {T}o address this challenge, we maintained the coral {A}cropora muricata shaded from {UVR} or under ambient {UVR} levels during two contrasting seasons, i.e. summer and winter, and assessed the impact of {UVR} on the coral holobiont at each season. {T}o this end, we analyzed the physiology (e.g., calcification, protein content, photosynthesis-related parameters) and coral microbiota composition, as well as the abundance and composition of the microbial communities and organic matter contents of the surrounding seawater. {O}ur results show major seasonal effects on coral phenotype: (1) a lower host biomass and photosynthesizing, but fast calcifying phenotype in summer, and (2) a higher host biomass and photosynthesizing, but slow calcifying phenotype in winter. {UVR} had only a significant impact on {S}ymbiodinium functioning. {S}pecifically, high {UVR} levels reduced photosynthesis efficiency in summer, but an increase in chlorophyll a content may have compensated for this effect. {T}he coral microbiota, which was variable but generally dominated by {E}ndozoicomonas, was not affected by {UVR}, but its composition differed between seasons. {I}n contrast, {UVR} had a major, but differential impact on the seawater microbial communities at both seasons. {P}articularly in summer, bacteria from the {A}lteromonadaceae were significantly more abundant (15-fold; up to 75%) in seawater under ambient {UVR} levels. {O}verall, our study suggests that {UVR} has only a limited impact on coral holobiont composition and functioning, despite major fluctuations in the surrounding seawater microbiome; seasonal changes in the holobiont are thus mostly driven by other environmental factors.},
  keywords = {coral ; holobiont ; symbiosis ; ultra-violet radiation ; seasonality ; bacteria ; symbiodinium ; physiology ; {NOUVELLE} {CALEDONIE} ; {NOUMEA} {LAGON}},
  booktitle = {},
  journal = {{F}rontiers in {M}arine {S}cience},
  volume = {5},
  numero = {},
  pages = {art. 275 [14 p.]},
  year = {2018},
  DOI = {10.3389/fmars.2018.00275},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075122},
}