E. V. Armbrust

Nitrogen fixation in mesoscale eddies of the North Pacific Subtropical Gyre: patterns and mechanisms

The paper investigates elevated nitrogen fixation rates in mesoscale eddies of the North Pacific Subtropical Gyre, finding that anticyclones support higher diazotroph abundances due to phosphate limitation relief, while physical dynamics influence other taxa.

Divergent functions of two clades of flavodoxin in diatoms mitigate oxidative stress and iron limitation

The paper shows that two flavodoxin clades in diatoms have divergent functions, with clade II adapting to iron limitation and clade I responding to oxidative stress.

Siderophore production and utilization by microbes in the North Pacific Ocean

The paper measures dissolved siderophore concentrations and types in the North Pacific Ocean, linking their distribution to microbial activity and environmental factors.

A flexible Bayesian approach to estimating size-structured matrix population models

This paper introduces a Bayesian framework to improve the estimation of size-structured matrix population models for microbial dynamics, demonstrating better performance and biological interpretability.

A Kernel-Based Change Detection Method to Map Shifts in Phytoplankton Communities Measured by Flow Cytometry

This paper introduces CytoSegmenter, a kernel-based method for segmenting flow cytometry point cloud data to detect shifts in phytoplankton communities, showing these shifts correlate with ocean temperature and salinity changes.

Disentangling top-down drivers of mortality underlying diel population dynamics of Prochlorococcus in the North Pacific Subtropical Gyre

The paper develops multitrophic models to investigate top-down and bottom-up drivers of Prochlorococcus population dynamics in the North Pacific Subtropical Gyre, finding grazers are the primary top-down factor despite high viral densities.

Simons Collaborative Marine Atlas Project (Simons CMAP): an open-source portal to share, visualize and analyze ocean data

Simons CMAP provides an open-source portal to integrate and analyze diverse ocean data for cross-disciplinary studies.

The dynamic trophic architecture of open-ocean protist communities revealed through machine- guided metatranscriptomics

This paper uses machine learning on metatranscriptomic data to predict the nutritional mode of oceanic protists and shows that mixotrophic populations adapt their nutrient acquisition strategies in response to environmental gradients.

Marine community metabolomes carry fingerprints of phytoplankton community composition

The paper shows that marine community metabolomes reflect phytoplankton community composition and highlights understudied compounds that represent significant pools of labile carbon.

Community-scale Synchronization and Temporal Partitioning of Gene Expression, Metabolism, and Lipid Biosynthesis in Oligotrophic Ocean Surface Waters

The paper uses machine learning to analyze time series data from ocean surface waters, revealing synchronized and asynchronous gene expression patterns linked to diel cycles and microbial niche partitioning.

Diel Oscillations of Particulate Metabolites Reflect Synchronized Microbial Activity in the North Pacific Subtropical Gyre

The paper measures diel oscillations of particulate metabolites and transcripts in the North Pacific Subtropical Gyre, showing 24-hour periodicity and microbial strategies for energy and redox management.