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| Auteurs principaux: | , , , |
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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Marine environmental research
2026
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| Sujets: | |
| Accès en ligne: | https://pubmed.ncbi.nlm.nih.gov/41338170/ |
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| _version_ | 1868266117056692224 |
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| author | Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo |
| author_facet | Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo |
| collection | PubMed - marine biology |
| contents | Successive stressors alter microbiome composition and reduce resilience in the eelgrass Zostera marina. Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo Zosteraceae Microbiota Stress, Physiological Ecosystem Seagrass meadows are among the most threatened ecosystems worldwide, facing multiple anthropogenic stressors that often occur in succession. While plant-physiological responses to multiple stressors are well documented, the role of microbial symbionts in mediating consecutive stressors events remains poorly understood. Using a mesocosm experiment, Zostera marina (eelgrass) was exposed to sequential stressors: nutrient enriched sediments (NE; 70 mg of total N per 100 gDW sediment for 28 days), followed by a simulated marine heatwave (MHW, 23.3 °C for 15 days) and subsequent storm event (25 cm/s flow, 12 days). Nutrient enrichment resulted in a microbiome shift, specifically a 49.2-fold enrichment of sulfur-oxidizing Arcobacteraceae and a 4.7-fold increase in Sulfurimonadaceae, suggesting possible microbiome-mediated responses mitigating sulfide toxicity. In contrast, warming responses were primarily physiological: aboveground biomass increased by 41.5 % and net production increased by 37.1 % (mg FW shoot day), with synergistic effects under combined enrichment and heat stress (up to 175 % higher production), indicating that temperature outweighs nutrient stress. Storm exposure triggered a 114 % increase in belowground biomass via root elongation, which increases the resilience of these plants to higher flow velocities, but this acclimation was diminished by 51 % in plants previously exposed to the MHW, indicating environmental legacy effects. Our results demonstrate that eelgrass resilience depends critically on stressors sequence, where legacy effects alter both plant-microbe interactions and physiological responses. These findings emphasize the need to incorporate both a consecutive-stressor approach and microbiome dynamics into seagrass research and conservation strategies under climate change. |
| format | Artículo científico |
| id | pubmed_41338170 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Marine environmental research |
| record_format | pubmed |
| spellingShingle | Successive stressors alter microbiome composition and reduce resilience in the eelgrass Zostera marina. Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo Zosteraceae Microbiota Stress, Physiological Ecosystem Successive stressors alter microbiome composition and reduce resilience in the eelgrass Zostera marina. Egea, Luis G Jiménez-Ramos, Rocío Rodríguez-Arias, Lucía Infantes, Eduardo Zosteraceae Microbiota Stress, Physiological Ecosystem Seagrass meadows are among the most threatened ecosystems worldwide, facing multiple anthropogenic stressors that often occur in succession. While plant-physiological responses to multiple stressors are well documented, the role of microbial symbionts in mediating consecutive stressors events remains poorly understood. Using a mesocosm experiment, Zostera marina (eelgrass) was exposed to sequential stressors: nutrient enriched sediments (NE; 70 mg of total N per 100 gDW sediment for 28 days), followed by a simulated marine heatwave (MHW, 23.3 °C for 15 days) and subsequent storm event (25 cm/s flow, 12 days). Nutrient enrichment resulted in a microbiome shift, specifically a 49.2-fold enrichment of sulfur-oxidizing Arcobacteraceae and a 4.7-fold increase in Sulfurimonadaceae, suggesting possible microbiome-mediated responses mitigating sulfide toxicity. In contrast, warming responses were primarily physiological: aboveground biomass increased by 41.5 % and net production increased by 37.1 % (mg FW shoot day), with synergistic effects under combined enrichment and heat stress (up to 175 % higher production), indicating that temperature outweighs nutrient stress. Storm exposure triggered a 114 % increase in belowground biomass via root elongation, which increases the resilience of these plants to higher flow velocities, but this acclimation was diminished by 51 % in plants previously exposed to the MHW, indicating environmental legacy effects. Our results demonstrate that eelgrass resilience depends critically on stressors sequence, where legacy effects alter both plant-microbe interactions and physiological responses. These findings emphasize the need to incorporate both a consecutive-stressor approach and microbiome dynamics into seagrass research and conservation strategies under climate change. |
| title | Successive stressors alter microbiome composition and reduce resilience in the eelgrass Zostera marina. |
| topic | Zosteraceae Microbiota Stress, Physiological Ecosystem |
| url | https://pubmed.ncbi.nlm.nih.gov/41338170/ |