@article{fdi:010083389,
  title = {{E}ffects of elevated temperature and p{CO}(2) on the respiration, biomineralization and photophysiology of the giant clam {T}ridacna maxima},
  author = {{B}rahmi, {C}. and {C}hapron, {L}. and {L}e {M}oullac, {G}. and {S}oyez, {C}. and {B}eliaeff, {B}. and {L}azareth, {C}laire and {G}aertner-{M}azouni, {N}. and {V}idal-{D}upiol, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}any reef organisms, such as the giant clams, are confronted with global change effects. {A}bnormally high seawater temperatures can lead to mass bleaching events and subsequent mortality, while ocean acidification may impact biomineralization processes. {D}espite its strong ecological and socio-economic importance, its responses to these threats still need to be explored. {W}e investigated physiological responses of 4-year-old {T}ridacna maxima to realistic levels of temperature (+1.5 degrees {C}) and partial pressure of carbon dioxide (p{CO}(2)) (+800 mu atm of {CO}2) predicted for 2100 in {F}rench {P}olynesian lagoons during the warmer season. {D}uring a 65-day crossed-factorial experiment, individuals were exposed to two temperatures (29.2 degrees {C}, 30.7 degrees {C}) and two p{CO}(2) (430 mu atm, 1212 mu atm) conditions. {T}he impact of each environmental parameter and their potential synergetic effect were evaluated based on respiration, biomineralization and photophysiology. {K}inetics of thermal and/or acidification stress were evaluated by performing measurements at different times of exposure (29, 41, 53, 65 days). {A}t 30.7 degrees {C}, the holobiont {O}-2 production, symbiont photosynthetic yield and density were negatively impacted. {H}igh p{CO}(2) had a significant negative effect on shell growth rate, symbiont photosynthetic yield and density. {N}o significant differences of the shell microstructure were observed between control and experimental conditions in the first 29 days; however, modifications (i.e. less-cohesive lamellae) appeared from 41 days in all temperature and p{CO}(2) conditions. {N}o significant synergetic effect was found. {P}resent thermal conditions (29.2 degrees {C}) appeared to be sufficiently stressful to induce a host acclimatization response. {A}ll these observations indicate that temperature and p{CO}(2) are both forcing variables affecting {T}. maxima's physiology and jeopardize its survival under environmental conditions predicted for the end of this century.},
  keywords = {{G}iant clams ; ocean acidification ; photosynthetic yield ; respiration ; symbionts ; thermal stress ; {POLYNESIE} {FRANCAISE} ; {TUAMOTU} {GAMBIER}},
  booktitle = {},
  journal = {{C}onservation {P}hysiology},
  volume = {9},
  numero = {},
  pages = {1--17},
  ISSN = {2051-1434},
  year = {2021},
  DOI = {10.1093/conphys/coab041},
  URL = {https://www.documentation.ird.fr/hor/fdi:010083389},
}