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<p>Coral reefs are some of Earth's most biologically diverse and ecologically important ecosystems, but they face significant threats from climate change and human activities. Coral transplantation has become a key strategy for reef restoration. This study examined the transplantation of <i>Galaxea fascicularis</i> at northern Wuzhizhou Island, Hainan, and focused on the physiological and metabolomic differences between transplanted and parent corals at 1, 6, and 12&#xa0;months post-transplantation. The results showed that the survival rate of transplanted corals rapidly declined during the first 6&#xa0;months, then stabilized at 64.58%. The transplanted coral initially showed a decrease in Fv/Fm, indicating stress during transplantation, which reduced photosynthetic efficiency. Six months post-transplantation, Fv/Fm levels were not significantly different from those of the parent coral. Both zooxanthellae density and biomass increased steadily over time. By 12&#xa0;months, protein and lipid content had significantly increased, and the corals reached sexual maturity with fully developed sperm and eggs. Metabolomic analysis showed that, in the short term (1&#xa0;month) and mid-term (6&#xa0;months), the arachidonic acid pathway was upregulated, while the glycerophosphate pathway was downregulated, helping corals manage environmental stress and resource redistribution. By 12&#xa0;months, oxidative phosphorylation was upregulated to meet the energy demands of reproduction. These findings demonstrate that <i>G. fascicularis</i> can adapt effectively to restored environments and reach sexual maturity quickly, making it a promising candidate for coral reef restoration.</p>

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Analyzing adaptation mechanisms in artificial transplantation of Galaxea fascicularis

  • 期刊论文

  • 发表日期：

    2025年6月5日

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  • He Zhao,
  • Hongmin Wang,
  • Jingzhao Ke,
  • Junling Zhang,
  • Yushan Li,
  • Xiangbo Liu,
  • Wentao Zhu,
  • Aimin Wang,
  • Xiubao Li

摘要

Coral reefs are some of Earth's most biologically diverse and ecologically important ecosystems, but they face significant threats from climate change and human activities. Coral transplantation has become a key strategy for reef restoration. This study examined the transplantation of Galaxea fascicularis at northern Wuzhizhou Island, Hainan, and focused on the physiological and metabolomic differences between transplanted and parent corals at 1, 6, and 12 months post-transplantation. The results showed that the survival rate of transplanted corals rapidly declined during the first 6 months, then stabilized at 64.58%. The transplanted coral initially showed a decrease in Fv/Fm, indicating stress during transplantation, which reduced photosynthetic efficiency. Six months post-transplantation, Fv/Fm levels were not significantly different from those of the parent coral. Both zooxanthellae density and biomass increased steadily over time. By 12 months, protein and lipid content had significantly increased, and the corals reached sexual maturity with fully developed sperm and eggs. Metabolomic analysis showed that, in the short term (1 month) and mid-term (6 months), the arachidonic acid pathway was upregulated, while the glycerophosphate pathway was downregulated, helping corals manage environmental stress and resource redistribution. By 12 months, oxidative phosphorylation was upregulated to meet the energy demands of reproduction. These findings demonstrate that G. fascicularis can adapt effectively to restored environments and reach sexual maturity quickly, making it a promising candidate for coral reef restoration.