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- W2890191570 abstract "Abstract Ocean warming and the increased prevalence of coral bleaching events threaten coral reefs. However, the biology of corals during and following bleaching events under field conditions is poorly understood. We examined bleaching and post-bleaching recovery in Montipora capitata and Porites compressa corals that either bleached or did not bleach during a 2014 bleaching event at three reef locations in Kāne‘ohe Bay, O‘ahu. We measured changes in chlorophylls, biomass, and nutritional plasticity using stable isotopes (δ 13 C, δ 15 N). Coral traits showed significant variation among bleaching conditions, reef sites, time periods, and their interactions. Bleached colonies of both species had lower chlorophyll and total biomass. While M. capitata chlorophyll and biomass recovered three months later, P. compressa chlorophyll recovery was location-dependent and total biomass of previously bleached colonies remained low. Biomass energy reserves were not affected by bleaching, instead M. capitata proteins and P. compressa biomass energy declined over time, and P. compressa lipid biomass was site-specific. Stable isotope analyses of host and symbiont tissues did not indicate increased heterotrophic nutrition in bleached colonies of either species, during or after thermal stress. Instead, mass balance calculations revealed variance in δ 13 C values was best explained by augmented biomass composition, whereas δ 15 N values reflected spatial and temporal variability in nitrogen sources in addition to bleaching effects on symbiont nitrogen demand. These results emphasize total biomass quantity may change substantially during bleaching and recovery. Consequently, there is a need to consider the influence of biomass composition in the interpretation of isotopic values in corals." @default.
- W2890191570 created "2018-09-27" @default.
- W2890191570 creator A5002924704 @default.
- W2890191570 creator A5011657766 @default.
- W2890191570 creator A5018806569 @default.
- W2890191570 creator A5022552857 @default.
- W2890191570 date "2018-09-11" @default.
- W2890191570 modified "2023-10-15" @default.
- W2890191570 title "Spatial variation in the biochemical and isotopic composition of corals during bleaching and recovery" @default.
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