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To quantify the seasonal biogeochemical dynamics, nutrient fluxes, and carbon remineralization rates in deep temperate shelf-sea permeable sediments.

August 16, 2026BiogeochemistryOpen Access

Seasonal biogeochemical cycling of permeable sediments in a temperate shelf sea environment

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To quantify the seasonal biogeochemical dynamics, nutrient fluxes, and carbon remineralization rates in deep temperate shelf-sea permeable sediments.
Sampled deep permeable sediments across multiple seasons (pre-bloom, post-bloom, and late-summer) in the Celtic Sea on the North-Eastern European shelf.
Conducted oxic sediment core incubations to determine rates of production and consumption for oxygen, iron(II), and nutrients including phosphate, silicate, and nitrate.
Oxygen consumption rates were significantly higher post-bloom (-15.65 ± 0.99 μmol O2 L−1 h−1) compared to pre-bloom (-9.60 ± 1.68 μmol O2 L−1 h−1) and late-summer (-9.05 ± 0.68 μmol O2 L−1 h−1).
Post-bloom conditions caused notable nitrate drawdown and significant iron(II) production, while phosphate and silicate were consistently released across all seasons.
Areal Celtic Shelf Sea flux estimates indicate permeable sediments consume ~3 × 10^4 mol O2 d−1, remineralizing ~10 kmol C yr−1 via advective flow.

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Implication

Observational study reveals seasonal variations in oxygen and nutrient fluxes in temperate shelf sediments, highlighting the role of advective flow in marine carbon cycling.

Cite This Study

Reynolds et al. (2026) studied this question.

synapsesocial.com/papers/6a81799af2fb91fc834acc9e https://doi.org/10.1007/s10533-026-01365-5

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Implication

Observational study reveals seasonal variations in oxygen and nutrient fluxes in temperate shelf sediments, highlighting the role of advective flow in marine carbon cycling.

Seasonal biogeochemical cycling of permeable sediments in a temperate shelf sea environment

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Implication

Cite This Study

Seasonal biogeochemical cycling of permeable sediments in a temperate shelf sea environment

Key Points

Discussion

Implication

Cite This Study

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