Marine Plankton and Biogeochemistry

Superoxide dismutases shape manganese stoichiometry in Southern Ocean diatoms

The paper quantifies the role of superoxide dismutases in manganese stoichiometry of Southern Ocean diatoms and identifies environmental controls on these enzymes.

Contribution of ammonia oxidizers to inorganic carbon fixation in the dark ocean

This study shows that ammonia oxidizers contribute only a small fraction to dark ocean DIC fixation, challenging the assumption that nitrification primarily sustains carbon fixation in the deep ocean.

Phytoplankton community structure and photophysiological strategies in the oligotrophic Indian Ocean spawning ground of Southern Bluefin Tuna

This study identifies Prochlorococcus as dominant in the oligotrophic Argo Basin, revealing photophysiological strategies that enable survival under nitrate limitation and Fe stress, and shows how mesoscale eddies episodically alter phytoplankton communities.

Testing the priming effect in the deep ocean: are microbes too starved to consume recalcitrant organic carbon?

This study tests if adding labile compounds to deep ocean water stimulates microbial consumption of recalcitrant organic carbon, finding no priming effect and instead highlighting microbial competition as a key factor.

The effects of iron limitation on the small chlorophyte Micromonas from the Northeast Pacific Ocean

This study examines how Micromonas sp. responds to iron limitation and estimates its contribution to new production in the Northeast Pacific Ocean.

A diverse community constitutes global coccolithophore calcium carbonate stocks

The paper shows that Gephyrocapsa huxleyi contributes only 7% to global coccolithophore calcium carbonate stocks, with diverse species dominating, challenging the focus on this single species in research.

Effects of increasing hydrostatic pressures on marine microbial enzymatic activities

This study measures how increasing hydrostatic pressure affects microbial enzymatic activities in marine environments, finding variable effects with partial activity reduction and occasional piezotolerance.

Phytoplankton Photophysiology Reveals Depth Specific Zooplankton Grazing

The paper uses flow cytometry to analyze phytoplankton in zooplankton fecal pellets, revealing depth-specific grazing patterns by linking photophysiological properties to vertical profiles.

Extracellular rRNA profiling reveals the sinking and cell lysis dynamics of marine microeukaryotes

This study uses rRNA profiling to analyze cell lysis dynamics of marine microeukaryotes, finding higher lysis rates in the mesopelagic zone than in the epipelagic layer.

Dynamic Reworking of Marine Diatom Endometabolomes

The paper analyzes the dynamic changes in diatom endometabolomes under different temperature and bacterial conditions, revealing significant variation in metabolite concentrations and pathways.

Solitary phytoplankton cells sink in the mesopelagic ocean

The paper observes solitary sinking phytoplankton cells in the mesopelagic ocean, showing they contribute to nutrient supply and seed banks despite being a small fraction of organic carbon flux.

Unveiling Crocosphaera responses to phosphorus depletion: insights from genome analysis and functional characterization

This study investigates how Crocosphaera responds to phosphorus depletion through genomic analysis and functional characterization, revealing strain-specific adaptations and circadian regulation of Pi-related genes.

Long-term euxinia hinders microbial ammonium removal in brackish coastal waters

The paper examines nitrogen dynamics in coastal waters with varying redox conditions, finding that long-term euxinia reduces ammonium removal by inhibiting nitrification.

Biogeochemical function of slicks in coastal surface waters of the Baltic Sea

The paper examines the biogeochemical role of slicks in the Baltic Sea, finding they influence microbial activity, surfactant levels, and oxygen dynamics in surface waters.

Effect of Sulfate Availability on Phytoplankton Stoichiometry

This study examines how sulfate availability affects phytoplankton elemental stoichiometry, finding that red lineage species have higher sulfur content and distinct responses to sulfate changes compared to green lineage species.

Fast or slow - light climate modulates intra-population sinking velocities in small phytoplankton

The paper measures sinking velocities of phytoplankton under different light conditions and finds that sinking rates vary with growth stage and light levels, deviating from Stokes Law predictions.

Large shifts in diatom and dinoflagellate biomass in the North Atlantic over six decades

The paper analyzes plankton data to show declining diatom and dinoflagellate biomass in the North Atlantic, with a relative increase in diatoms despite warming waters.

Revealing Long-Term Multi-Factor Climate Impacts on Antarctic Phytoplankton: A Trend-Based Approach Using STL and Piecewise SEM

This study quantifies climate and environmental impacts on Antarctic phytoplankton biomass over 20 years using trend-based methods and SEM, revealing ocean acidification, iron limitation, and seasonal causal pathway differences.

Storm in a bottle: An experimental investigation of how extreme precipitation impacts phytoplankton communities

The paper tests two hypotheses about how extreme precipitation affects phytoplankton communities in estuaries, finding support for both nutrient-driven growth and introduction of new taxa.

Viral infection induces oxylipin chemical signaling at the end of a summer upwelling bloom: implications for carbon cycling.

This study shows viral infection of diatoms increases oxylipin production, enhancing carbon export in the ocean despite viral shunt processes.

From Red Tides to Healthy Ecosystems by NutrientManagement in Ise Bay and Mikawa Bay

The paper analyzes the relationship between nutrient concentrations and phytoplankton growth in Ise Bay and Mikawa Bay to determine optimal nutrient levels for healthy ecosystems.

Metabolic reprogramming of protists within the microbiome of sinking particles

This study examines the metabolic activity of protists in sinking and suspended marine particles, revealing taxon-specific metabolic reprogramming and the role of specific protists and viruses in organic carbon export.

Seasonal and spatial transitions in phytoplankton assemblages spanning estuarine to open ocean waters of the tropical Pacific

This study examines seasonal and spatial changes in phytoplankton communities across estuarine to open ocean waters in the tropical Pacific, revealing distinct community transitions and environmental drivers.

Atypical phosphatases drive dissolved organic phosphorus utilization by phosphorus-stressed phytoplankton in the California Current Ecosystem

The paper investigates phosphatase activity and gene expression in the California Current Ecosystem, finding atypical phosphatases drive DOP utilization despite Pi repletion.

Molecular activity mediates the composition and assembly of dissolved organic matter in lake sediments

The study examines how molecular activity influences the composition and assembly of dissolved organic matter in lake sediments across different climates.

Emergent patterns of patchiness reflect decoupling between ocean physics and biology

The paper analyzes global ocean data to show that physical and biological patchiness are decoupled, using variance slope to quantify spatial patterns.

Viral infection impacts volatile organic compound production in the coccolithophore Gephyrocapsa huxleyi

This study identifies 79 VOCs affected by viral infection in Gephyrocapsa huxleyi, revealing a six-fold increase in VOC production during lysis and a previously unrecognized diversity of compounds.

The Plankton Imager (Pi-10): An imaging instrument for automated and continuous zooplankton data collection

The Pi-10 captures continuous zooplankton images in real-time, providing high-resolution data for oceanographic research and digital twin development.

Wildfire ash impacts to photosynthesis and growth of marine phytoplankton cultures

This study examines the effects of wildfire ash on marine phytoplankton growth and photosynthesis, finding reduced efficiency and inhibited growth in experimental cultures.

Extracellular superoxide production is a widespread photoacclimation strategy in phytoplankton

This study shows that phytoplankton produce extracellular superoxide to acclimate to light stress, with DPI inhibiting this process and reducing photosynthetic health.