@article{fdi:010074364,
  title = {{E}ffects of ultraviolet radiation and nutrient level on the physiological response and organic matter release of the scleractinian coral {P}ocillopora damicornis following thermal stress},
  author = {{C}ourtial, {L}. and {B}ielsa, {V}. {P}. and {H}oulbr{\`e}que, {F}anny and {F}errier-{P}ages, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding which factors enhance or mitigate the impact of high temperatures on corals is crucial to predict the severity of coral bleaching worldwide. {O}n the one hand, global warming is usually associated with high ultraviolet radiation levels ({UVR}), and surface water nutrient depletion due to stratification. {O}n the other hand, eutrophication of coastal reefs increases levels of inorganic nutrients and decreases {UVR}, so that the effect of different combinations of these stressors on corals is unknown. {I}n this study, we assessed the individual and crossed effects of high temperature, {UVR} and nutrient level on the key performance variables of the reef building coral {P}ocillopora damicornis. {W}e found that seawater warming was the major stressor, which induced bleaching and impaired coral photosynthesis and calcification in all nutrient and {UVR} conditions. {T}he strength of this effect however, was nutrient dependent. {C}orals maintained in nutrient-depleted conditions experienced the highest decrease in net photosynthesis under thermal stress, while nutrient enrichment (3 mu {M} {NO}3- and 1 mu {M} {PO}4+) slightly limited the negative impact of temperature through enhanced protein content, photosynthesis and respiration rates. {UVR} exposure had only an effect on total nitrogen release rates, which significantly decreased under normal growth conditions and tended to decrease also under thermal stress. {T}his result suggests that increased level of {UVR} will lead to significant changes in the nutrient biogeochemistry of surface reef waters. {O}verall, our results show that environmental factors have different and interactive effects on each of the coral's physiological parameters, requiring multifactorial approaches to predict the future of coral reefs.},
  keywords = {},
  booktitle = {},
  journal = {{PL}o{S} {O}ne},
  volume = {13},
  numero = {10},
  pages = {e0205261 [18 p.]},
  ISSN = {1932-6203},
  year = {2018},
  DOI = {10.1371/journal.pone.0205261},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074364},
}