ArticleFrontiers in microbiology2016
Regulation of Intertidal Microphytobenthos Photosynthesis Over a Diel Emersion Period Is Strongly Affected by Diatom Migration Patterns.
Article in Frontiers in microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 45 citations in OpenAlex.
- Functional morphology of gliding motility in benthic diatoms.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Seafloor primary production in a changing Arctic Ocean.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Transcriptomic and metabolic signatures of diatom plasticity to light fluctuations.Plant physiology · 2022Article
- Spatial and temporal variations in salt marsh microorganisms of the Wadden Sea.Ecology and evolution · 2022Article
- Assessing biomass and primary production of microphytobenthos in depositional coastal systems using spectral information.PloS one · 2021Article
- Diel patterns of microphytobenthic primary production in intertidal sediments: the role of photoperiod on the vertical migration circadian rhythm.Scientific reports · 2019Article
- Radiative Energy Budgets in a Microbial Mat Under Different Irradiance and Tidal Conditions.Microbial ecology · 2019Article
- Inorganic carbon availability in benthic diatom communities: photosynthesis and migration.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
- Radiative Energy Budgets of Phototrophic Surface-Associated Microbial Communities and their Photosynthetic Efficiency Under Diffuse and Collimated Light.Frontiers in microbiology · 2017Article
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Authors and funding
4 authors at 3 institutions in 3 countries.
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Abstract
Changes in biomass and photosynthesis of a diatom-dominated microphytobenthos (MPB) intertidal community were studied over a diel emersion period using a combination of O2 and scalar irradiance microprofiling, variable chlorophyll (Chl) fluorescence, and pigment analysis. The MPB biomass in the photic zone (0-0.5 mm) of the sediment exposed to low irradiance (150 μmol photons m(-2) s(-1)) showed a >2-fold increase during the first hours of the emersion period, reaching >0.2 mg Chl a cm(-3). Concentrations of Chl a started to decrease half-way through the emersion period, almost 2 h before tidal inundation. Similarly, O2 concentrations and volumetric gross photosynthesis in the photic zone increased during the first half of the emersion period and then decreased toward the timing of incoming tide/darkness. The results suggest that intertidal MPB community-level photosynthesis is mainly controlled by changes in the productive biomass of the photic zone determined by cell migration. A diel pattern in the photosynthesis vs. irradiance parameters α (photosynthetic efficiency at limiting irradiance) and ETR max (photosynthetic capacity at saturating irradiance) was also observed, suggesting photoacclimation of MPB. Under high light exposure (2000 μmol photons m(-2) s(-1)), lower α, ETR max and sediment O2 concentrations were observed when cell migration was inhibited with the diatom motility inhibitor latrunculin A (Lat A), showing that migration is also used by MPB to maximize photosynthesis by reducing exposure to potentially photoinhibitory light levels. A higher de-epoxidation state in sediment treated with Lat A indicates that the involvement of the xanthophyll cycle in physiological photoprotection is more relevant in MPB when cells are inhibited from migrating. In the studied diatom-dominated MPB intertidal community, cell migration seems to be the key factor regulating photosynthesis over a diel emersion period and upon changes in light exposure.
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