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Ocean acidification influence on Cymodocea nodosa seedling development.
Alessia Crobu1, Ivan Guala2, Mariangela Moro Merella1
1Department of Chemical Physical Mathematical and Natural Sciences, University of Sassari, Sassari, Italy.
Marine Environmental Research
|July 13, 2026
Summary
Ocean acidification impacts young seagrasses, with higher CO2 reducing seedling viability but promoting development. These findings suggest potential acclimation to future ocean conditions.
Area of Science:
- Marine Biology
- Oceanography
- Plant Science
Background:
- Ocean acidification (OA) poses a threat to marine ecosystems.
- The effects of OA on seagrass early life stages are largely unknown.
- Seagrasses are vital coastal habitats.
Purpose of the Study:
- To investigate the impact of ocean acidification on Cymodocea nodosa seedlings.
- To assess the influence of seed origin on seedling response to OA.
- To understand seagrass acclimation potential to future acidified oceans.
Main Methods:
- Field experiment utilizing a natural low-pH gradient from submarine vents.
- Exposure of Cymodocea nodosa seedlings to elevated pCO2 levels for four months.
- Analysis of seedling viability, morphometry, and leaf carbon content.
Main Results:
- Increased pCO2 (ocean acidification) reduced seedling viability.
- Seedlings exhibited enhanced development under higher pCO2 conditions.
- Leaf carbon content decreased in seedlings exposed to elevated pCO2, irrespective of seed origin.
Conclusions:
- Cymodocea nodosa seedlings display compensatory responses to ocean acidification.
- These responses may facilitate acclimation of early life stages to future acidified oceans.
- Seed origin did not significantly alter the observed responses to OA.
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