Marine and coastal ecosystems

Enhancing role of nitrogen fixation in biogeochemical cycles of the Pacific Arctic

This study shows that nitrogen fixation in the Pacific Arctic increased with earlier sea ice retreat, driven by warming and borealization, contributing significantly to new production.

Particle lability drives degradation dynamics and bacterial community assembly during a Phaeocystis bloom decline

The paper quantifies microbial degradation rates of organic carbon during a Phaeocystis bloom decline, showing that suspended carbon can be rapidly remineralized when blooms produce exopolymer-rich colonies.

Exploring Warming Effects on lower food-web dynamics in the plankton of the River Elbe Estuarine Ecosystem in summer: Insights from a Mesocosm Experiment

This study examines warming effects on plankton dynamics in a mesocosm experiment, finding that internal trophic interactions and environmental factors drive changes more than temperature alone.

Enhanced carbon storage in dissolved organic matter in a future oligotrophic ocean

This study shows that marine dissolved organic carbon (DOC) will increase by 18-44 gigatons by 2200 under high-emission scenarios due to intensified nutrient limitation, contributing to deep-ocean carbon storage.

Characterization of the vertical distribution of plankton and the formation of thin layers in the northern Gulf of Mexico using digital holography

The paper uses digital holography to study plankton vertical distribution and thin layer formation in the northern Gulf of Mexico, finding that salt-wedge dynamics drive phytoplankton aggregation while zooplankton remain broadly distributed.

Prochlorococcus predation by a globally abundant filter feeder

This study experimentally examines Prochlorococcus predation by appendicularians, finding retention rates increase with prey concentration and predator age, and that both ecotypes HLI and HLII are equally grazed.

The ecology of carbon sequestration in coastal upwelling ecosystems

This paper reviews carbon sequestration mechanisms in coastal upwelling ecosystems and suggests a model to predict climate change impacts on carbon dioxide uptake.

Alkaline phosphatase activity supports heterotrophic carbon acquisition in a coastal time series site and a representative marine bacterium

This study shows that alkaline phosphatase activity in marine bacteria supports carbon acquisition from dissolved organic phosphorus, even in phosphate-rich conditions.

Characterization of Phytoplankton-Excreted Metabolites Mediating Carbon Flux through the Surface Ocean

This study quantifies amine- and alcohol-containing exometabolites from six phytoplankton species, revealing taxonomic variation in exometabolite composition and its impact on marine carbon cycling.

Priming the pump: Enhanced nitrite release in response to a nitrate pulse by nitrogen-limited Prochlorococcus

The paper shows that nitrogen-limited Prochlorococcus release more nitrite after a nitrate pulse compared to nitrogen-replete cells, suggesting a role in nitrite cycling under nitrogen limitation.

Mapping of the viral shunt across widespread coccolithophore blooms using metabolic biomarkers

The paper identifies organohalogen metabolites as biomarkers for the viral shunt in coccolithophore blooms, showing their global formation and environmental stability.

Variation in survival and growth following prolonged darkness in a polar diatom species

The paper tests if prolonged darkness affects survival and growth of a polar diatom species, finding reduced survival and growth with longer darkness and higher temperature.

Phytoplankton community composition in the oligotrophic Argo Basin of the eastern Indian Ocean

The paper describes phytoplankton community composition in the oligotrophic Argo Basin during austral summer 2022, highlighting taxonomic and functional diversity across different depth layers.

Picophytoplankton Implicated in Productivity and Biogeochemistry in the North Pacific Transition Zone

The paper identifies key picophytoplankton and co-occurring mixotrophs linked to biogeochemical dynamics in the North Pacific Transition Zone using molecular and biogeochemical data.

Nutrient response strategies drive coastal range shifts of phytoplankton taxa

The paper examines how nutrient response strategies of two rare phytoplankton taxa contribute to their increasing prevalence in Cape Cod Bay over 20 years.

Sinking particle export within and beneath the euphotic zone in the eastern Indian Ocean

The paper quantifies carbon export and sinking particle characteristics in the eastern Indian Ocean, finding net remineralization in the deep euphotic zone and similar patterns to the Gulf of Mexico.

Heritable diel energy reserves enhance diatom growth

This paper demonstrates that heritable diel energy reserves in diatoms enhance growth by allowing rapid division during the dark phase, leading to a significant increase in population abundance.

Diatoms vs dinoflagellates: a temporal network analysis of bloom impacts on diversity and phytoplankton community structure in French coastal waters

Phytoplankton phenology through gene expression during the North Atlantic spring bloom decline

The paper examines gene expression and biological rates in four dominant phytoplankton groups during the North Atlantic spring bloom decline to understand their physiological changes and impact on biogeochemistry.

B-vitamin requirements and phycosphere interactions for the HAB-forming dinoflagellate, Pyrodinium bahamense var. bahamense

This study shows that P. bahamense requires exogenous B12 for growth and that specific bacterial communities from bloom sites can provide B12, supporting bloom formation.

Seasonal Enhancement of the Viral Shunt Catalyzes a Subsurface Oxygen Maximum in the Sargasso Sea

The paper identifies viral shunt activity as a driver of seasonal subsurface oxygen maxima in the Sargasso Sea by linking elevated cyanophage activity and bacterial catabolism.

Exploring the roles of trophic mode and microbial prey size in grazing pathways of tropical oligotrophic waters of the eastern Indian Ocean

The paper investigates grazing pathways in tropical oligotrophic waters by analyzing copepod and microzooplankton diets, finding that microzooplankton remove most daily production while copepods show moderate selection for picoplankton.

Primary productivity and N2-fixation in the eastern Indian Ocean: bottom-up support for an ecologically and economically important ecosystem

The paper quantifies primary productivity and nitrogen fixation in the eastern Indian Ocean, showing nitrogen recycling and N2 fixation support ecosystem productivity.

Acidic vacuole-containing organisms are a majority of the eukaryotic microbial community in oligotrophic Argo Basin waters (eastern Indian Ocean)

The paper identifies mixotrophs as a dominant component of the eukaryotic microbial community in oligotrophic Argo Basin waters, with high proportions of acid vacuole-containing microbes.

Biophysical and molecular mechanisms responsible for phytoplankton sinking in response to starvation

The paper investigates how nutrient starvation affects gravitational sinking in phytoplankton by analyzing biophysical and molecular changes across species.

Anisotropic fluorescence emission by diatoms modifies the underwater oceanic light field

This paper shows diatoms emit chlorophyll fluorescence anisotropically, altering underwater light fields and potentially affecting marine processes.

Terrigenous inputs link nutrient dynamics to microbial communities in a tropical lagoon

This study links terrigenous nutrient inputs to microbial community structure and nutrient dynamics in tropical lagoons through analysis of macroalgal nitrogen content and water chemistry.

Cellular-level control on global ocean deoxygenation driven by phytoplankton ecophysiology

The paper estimates phytoplankton elemental composition and shows how cellular-level changes affect global ocean oxygen consumption and hypoxic zone expansion.

Elemental allocation to molecular drivers of biogeochemistry in the Southern Ocean

The paper examines elemental allocation in Southern Ocean microbial proteins and metabolic processes, showing how iron scarcity affects metal distribution and challenges assumptions about nutrient stoichiometry.

Seasonal patterns in b-vitamins and cobalamin co-limitation in the Northwest Atlantic

This study measures b-vitamins and cobalamin in the Northwest Atlantic over 5 years, showing seasonal differences in their concentrations and their impact on phytoplankton growth.