Summary of Study ST004329
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR002743. The data can be accessed directly via it's Project DOI: 10.21228/M83G2D This work is supported by NIH grant, U2C- DK119886. See: https://www.metabolomicsworkbench.org/about/howtocite.php
| Study ID | ST004329 |
| Study Title | Acute heat stress redirects coral carbon budgets: integrative evidence from physiology and metabolomics |
| Study Summary | Marine heatwaves increasingly disrupt coral carbon budgets, yet how thermal stress reshapes whole-holobiont carbon fixation across species remains insufficiently resolved. Here, paired carbon-flux components—total photosynthetic carbon fixation (TPCF) and total calcification-associated carbon fixation (TCCF)—were quantified in three reef-building corals from the northern South China Sea (Acropora hyacinthus, Pocillopora damicornis, Porites lutea) under controlled acute warming and were integrated with photophysiology and untargeted metabolomics. Across taxa, TPCF declined with temperature in concert with reduced PSII efficiency, whereas TCCF decreased in all species and, under severe heat, shifted to net dissolution in the branching A. hyacinthus and P. damicornis; by contrast, the thick-tissued P. lutea retained a marginally positive calcification-associated flux. Metabolomic enrichment indicated heat-induced rewiring of central carbon metabolism away from growth toward maintenance and repair, with constrained photosynthate preferentially routed to nucleotide biosynthesis (purine/pyrimidine), translational supply (aminoacyl-tRNA), and membrane-lipid remodeling. These coordinated reallocations provide a mechanistic basis for divergent calcification outcomes—preservation of minimal accretion in P. lutea versus rapid stalling of light-enhanced calcification and skeletal dissolution in branching taxa. At the community scale, the contrasted strategies imply that repeated heatwaves may favor more stress-tolerant, thick-tissued assemblages and erode carbonate-budget capacity in branching communities. Although the metabolomics employed here capture holobiont-level signals and do not partition host versus Symbiodiniaceae contributions, the paired-flux–omics framework establishes a process-level link between photosynthate constraint, carbon-allocation decisions, and calcification outcomes, yielding tractable indicators for forecasting functional resilience and evaluating interventions under intensifying thermal extremes. |
| Institute | Chinese Academy of Sciences |
| Last Name | Tang |
| First Name | Shuo |
| Address | Guangzhou, Guangdong, China |
| tangshuo23@mails.ucas.ac.cn | |
| Phone | 19875477513 |
| Submit Date | 2025-10-29 |
| Raw Data Available | Yes |
| Raw Data File Type(s) | mzXML |
| Analysis Type Detail | LC-MS |
| Release Date | 2025-11-07 |
| Release Version | 1 |
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Subject:
| Subject ID: | SU004484 |
| Subject Type: | Other organism |
| Subject Species: | Acropora hyacinthus, Pocillopora damicornis, Porites lutea |
| Taxonomy ID: | 55974,46731,51062 |
