Oxygen allocation dynamics in a seagrass Zostera marina meadow.
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| Format: | Artículo científico |
| Langue: | en |
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Marine environmental research
2026
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| _version_ | 1868266130309644288 |
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| author | Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop |
| author_facet | Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop |
| collection | PubMed - marine biology |
| contents | Oxygen allocation dynamics in a seagrass Zostera marina meadow. Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop Zosteraceae Oxygen Temperature Ecosystem Photosynthesis Seasons Biomass Photosynthetic activity in seagrasses benefits various marine organisms in the seagrass ecosystem by supplying oxygen (O). This study investigated the allocation of photosynthetically produced O between the above- and below-ground tissues of Zostera marina under different irradiance levels and temperature conditions. Annual variations in O production, consumption, and supply to the surrounding ecosystem were also estimated based on tissue O release and respiration rates, along with in situ underwater irradiance, water temperature, and seagrass biomass. The proportion of O allocated to both above- and below-ground tissues varied depending on light conditions. Across all light conditions, the O allocated to above-ground tissues consistently accounted for a larger proportion than that allocated to non-photosynthetic below-ground tissues. As light intensity decreased, the contribution of O allocated to below-ground tissues declined, indicating that O production in above-ground tissues was insufficient to meet the O demands of the below-ground tissues. The estimated O consumption, release, and daily O supply within the Z. marina meadow varied seasonally, driven by changes in temperature and irradiance conditions. In above-ground tissues, O consumption during the night was lowest in winter, while O release during the day was highest in the warmer months (May-July). The mean daily O supply was 46.40 mmol O m d (ranging from -69.45 to 231.23 mmol O m d) from above-ground tissues and -9.23 mmol O m d (ranging from -32.43 to 0.25 mmol O m d) from below-ground tissues. Higher water temperatures and reduced underwater irradiance from late summer to fall resulted in a negative O supply, reducing seagrass shoot density and biomass. These results suggest that environmental changes, particularly those driven by ongoing climate change, significantly influence O dynamics in coastal seagrass ecosystems, with potential ecological consequences for the resistance and resilience of associated marine organisms. |
| format | Artículo científico |
| id | pubmed_41187522 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Marine environmental research |
| record_format | pubmed |
| spellingShingle | Oxygen allocation dynamics in a seagrass Zostera marina meadow. Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop Zosteraceae Oxygen Temperature Ecosystem Photosynthesis Seasons Biomass Oxygen allocation dynamics in a seagrass Zostera marina meadow. Kim, Hyegwang Zhang, Fei Kim, Seung Hyeon Suonan, Zhaxi Lee, Kun-Seop Zosteraceae Oxygen Temperature Ecosystem Photosynthesis Seasons Biomass Photosynthetic activity in seagrasses benefits various marine organisms in the seagrass ecosystem by supplying oxygen (O). This study investigated the allocation of photosynthetically produced O between the above- and below-ground tissues of Zostera marina under different irradiance levels and temperature conditions. Annual variations in O production, consumption, and supply to the surrounding ecosystem were also estimated based on tissue O release and respiration rates, along with in situ underwater irradiance, water temperature, and seagrass biomass. The proportion of O allocated to both above- and below-ground tissues varied depending on light conditions. Across all light conditions, the O allocated to above-ground tissues consistently accounted for a larger proportion than that allocated to non-photosynthetic below-ground tissues. As light intensity decreased, the contribution of O allocated to below-ground tissues declined, indicating that O production in above-ground tissues was insufficient to meet the O demands of the below-ground tissues. The estimated O consumption, release, and daily O supply within the Z. marina meadow varied seasonally, driven by changes in temperature and irradiance conditions. In above-ground tissues, O consumption during the night was lowest in winter, while O release during the day was highest in the warmer months (May-July). The mean daily O supply was 46.40 mmol O m d (ranging from -69.45 to 231.23 mmol O m d) from above-ground tissues and -9.23 mmol O m d (ranging from -32.43 to 0.25 mmol O m d) from below-ground tissues. Higher water temperatures and reduced underwater irradiance from late summer to fall resulted in a negative O supply, reducing seagrass shoot density and biomass. These results suggest that environmental changes, particularly those driven by ongoing climate change, significantly influence O dynamics in coastal seagrass ecosystems, with potential ecological consequences for the resistance and resilience of associated marine organisms. |
| title | Oxygen allocation dynamics in a seagrass Zostera marina meadow. |
| topic | Zosteraceae Oxygen Temperature Ecosystem Photosynthesis Seasons Biomass |
| url | https://pubmed.ncbi.nlm.nih.gov/41187522/ |