Publications

Latitudinal patterns in ocean C:N:P reflect phytoplankton acclimation and macromolecular composition
The proportions of carbon (C), nitrogen (N), and phosphorus (P) in surface ocean particulate matter deviate greatly from the canonical …
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Latitudinal patterns in ocean C:N:P reflect phytoplankton acclimation and macromolecular composition
High-frequency sampling captures variability in phytoplankton population-specific periodicity, growth, and productivity
The Hawaii Ocean Time-series (HOT) at Station ALOHA (22.75°N, 158°W) in the North Pacific Subtropical Gyre (NPSG) serves as a critical …
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High-frequency sampling captures variability in phytoplankton population-specific periodicity, growth, and productivity
Amplicon sequencing with internal standards yields accurate picocyanobacteria cell abundances as validated with flow cytometry
Marine microbial ecologists seek measurements of organismal abundance and diversity at high taxonomic resolution to understand …
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Amplicon sequencing with internal standards yields accurate picocyanobacteria cell abundances as validated with flow cytometry
Multiple biotic interactions establish phytoplankton community structure across environmental gradients
The combination of taxa and size classes of phytoplankton that coexist at any location affects the structure of the marine food web and …
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Multiple biotic interactions establish phytoplankton community structure across environmental gradients
Disentangling top-down drivers of mortality underlying diel population dynamics of Prochlorococcus in the North Pacific Subtropical Gyre
Photosynthesis fuels primary production at the base of marine food webs. Yet, in many surface ocean ecosystems, diel-driven primary …
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Disentangling top-down drivers of mortality underlying diel population dynamics of Prochlorococcus in the North Pacific Subtropical Gyre
Siderophore production and utilization by marine bacteria in the North Pacific Ocean
Siderophores are strong iron-binding molecules produced and utilized by microbes to acquire the limiting nutrient iron (Fe) from their …
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Siderophore production and utilization by marine bacteria in the North Pacific Ocean
Nitrogen fixation in mesoscale eddies of the North Pacific Subtropical Gyre: patterns and mechanisms
Mesoscale eddies have been shown to support elevated dinitrogen (N2) fixation rates (NFRs) and abundances of N2-fixing microorganisms …
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Nitrogen fixation in mesoscale eddies of the North Pacific Subtropical Gyre: patterns and mechanisms
Determining drivers of phytoplankton carbon to chlorophyll ratio at Atlantic Basin scale
We demonstrate the ability of flow cytometry to determine species specific cellular carbon and chlorophyll content in vivo by using …
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Determining drivers of phytoplankton carbon to chlorophyll ratio at Atlantic Basin scale
Modeling cell populations measured by flow cytometry with covariates using sparse mixture of regressions
The ocean is filled with microscopic microalgae, called phytoplankton, which together are responsible for as much photosynthesis as all …
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Modeling cell populations measured by flow cytometry with covariates using sparse mixture of regressions
Interoperable vocabulary for marine microbial flow cytometry
The recent development of biological sensors has extended marine plankton studies from conducting laboratory bench work to in vivo and …
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Interoperable vocabulary for marine microbial flow cytometry
Viruses affect picocyanobacterial abundance and biogeography in the North Pacific Ocean
The photosynthetic picocyanobacteria Prochlorococcus and Synechococcus are models for dissecting how ecological niches are defined by …
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Viruses affect picocyanobacterial abundance and biogeography in the North Pacific Ocean
A Bayesian approach to modeling phytoplankton population dynamics from size distribution time series
The rates of cell growth, division, and carbon loss of microbial populations are key parameters for understanding how organisms …
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A Bayesian approach to modeling phytoplankton population dynamics from size distribution time series
Trophic interactions with heterotrophic bacteria limit the range of Prochlorococcus
Prochlorococcus is the smallest and most abundant photosynthetic organism on Earth and is thought to be confined to low-latitude …
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Trophic interactions with heterotrophic bacteria limit the range of Prochlorococcus
Particulate metabolites and transcripts reflect diel oscillations of microbial activity in the surface ocean
Light fuels photosynthesis and organic matter production by primary producers in the sunlit ocean. The quantity and quality of the …
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Particulate metabolites and transcripts reflect diel oscillations of microbial activity in the surface ocean
A kernel-based change detection method to map shifts in phytoplankton communities measured by flow cytometry
Automated, ship-board flow cytometers provide high-resolution maps of phytoplankton composition over large swaths of the world’s …
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A kernel-based change detection method to map shifts in phytoplankton communities measured by flow cytometry
Marine community metabolomes carry fingerprints of phytoplankton community composition
Microscopic phytoplankton transform 100 million tons of inorganic carbon into thousands of different organic compounds each day. The …
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Marine community metabolomes carry fingerprints of phytoplankton community composition
Diel transcriptional oscillations of light-sensitive regulatory elements in open-ocean eukaryotic plankton communities
The 24-h cycle of light and darkness governs daily rhythms of complex behaviors across all domains of life. Intracellular …
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Diel transcriptional oscillations of light-sensitive regulatory elements in open-ocean eukaryotic plankton communities
Diel oscillations in the feeding activity of heterotrophic and mixotrophic nanoplankton in the North Pacific Subtropical Gyre
Daily oscillations in photosynthetically active radiation strongly influence the timing of metabolic processes in picocyanobacteria, …
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Diel oscillations in the feeding activity of heterotrophic and mixotrophic nanoplankton in the North Pacific Subtropical Gyre
The importance of the phytoplankton “middle class” to ocean net community production
The net balance between photosynthesis and respiration in the surface ocean is a key regulator of ocean-atmosphere carbon dioxide (CO2) …
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The importance of the phytoplankton “middle class” to ocean net community production
A single-cell polony method reveals low levels of infected Prochlorococcus in oligotrophic waters despite high cyanophage abundances
Long-term stability of picocyanobacteria in the open oceans is maintained by a balance between synchronous division and death on daily …
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A single-cell polony method reveals low levels of infected Prochlorococcus in oligotrophic waters despite high cyanophage abundances
Diel variability of bulk optical properties associated with the growth and division of small phytoplankton in the North Pacific Subtropical Gyre
Cross-platform observing systems are requisite to capturing the temporal and spatial dynamics of particles in the ocean. We present …
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Diel variability of bulk optical properties associated with the growth and division of small phytoplankton in the North Pacific Subtropical Gyre
Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN-A and other marine diazotrophs in the North Pacific
The number of marine environments known to harbor dinitrogen (N2)-fixing (diazotrophic) microorganisms is increasing, prompting a …
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Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN-A and other marine diazotrophs in the North Pacific
SeaFlow data v1, high-resolution abundance, size and biomass of small phytoplankton in the North Pacific
SeaFlow is an underway flow cytometer that provides continuous shipboard observations of the abundance and optical properties of small …
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SeaFlow data v1, high-resolution abundance, size and biomass of small phytoplankton in the North Pacific
Kīlauea lava fuels phytoplankton bloom in the North Pacific Ocean
From June to August 2018, the eruption of Kīlauea volcano on the island of Hawai‘i injected millions of cubic meters of molten lava …
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Kīlauea lava fuels phytoplankton bloom in the North Pacific Ocean
Two distinct pools of B12 analogs reveal community interdependencies in the ocean
Organisms within all domains of life require the cofactor cobalamin (vitamin B 12), which is produced only by a subset of bacteria and …
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Two distinct pools of B12 analogs reveal community interdependencies in the ocean
Dynamics of Teleaulax-like cryptophytes during the decline of a red water bloom in the Columbia River Estuary
The mixotrophic ciliate, Mesodinium rubrum, is a globally distributed ciliate that relies on the acquisition and use of chloroplasts …
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Dynamics of Teleaulax-like cryptophytes during the decline of a red water bloom in the Columbia River Estuary
Coordinated regulation of growth, activity and transcription in natural populations of the unicellular nitrogen-fixing cyanobacterium Crocosphaera
The temporal dynamics of phytoplankton growth and activity have large impacts on fluxes of matter and energy, yet obtaining in situ …
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Coordinated regulation of growth, activity and transcription in natural populations of the unicellular nitrogen-fixing cyanobacterium Crocosphaera
Biological production, export efficiency, and phytoplankton communities across 8000 km of the South Atlantic
In situ oxygen tracers (triple oxygen isotope and oxygen/argon ratios) were used to evaluate meridional trends in surface biological …
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Biological production, export efficiency, and phytoplankton communities across 8000 km of the South Atlantic
Scalable clustering algorithms for continuous environmental flow cytometry
Motivation: Recent technological innovations in flow cytometry now allow oceanographers to collect high-frequency flow cytometry data …
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Scalable clustering algorithms for continuous environmental flow cytometry
Light-driven synchrony of Prochlorococcus growth and mortality in the subtropical Pacific gyre
Theoretical studies predict that competition for limited resources reduces biodiversity to the point of ecological instability, whereas …
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Light-driven synchrony of Prochlorococcus growth and mortality in the subtropical Pacific gyre
Phytoplankton cell lysis associated with polyunsaturated aldehyde release in the northern Adriatic Sea
Diatoms are able to react to biotic and abiotic stress, such as competition, predation and unfavorable growth conditions, by producing …
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Phytoplankton cell lysis associated with polyunsaturated aldehyde release in the northern Adriatic Sea
The influence of net community production and phytoplankton community structure on CO2 uptake in the Gulf of Alaska
Biological productivity is a key factor controlling the ocean’s ability to take up carbon dioxide from the atmosphere. However, …
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The influence of net community production and phytoplankton community structure on CO2 uptake in the Gulf of Alaska
Real-time collaborative analysis with (almost) pure SQL: A case study in biogeochemical oceanography
We consider a case study using SQL-as-a-Service to support “instant analysis” of weakly structured relational data at a …
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Real-time collaborative analysis with (almost) pure SQL: A case study in biogeochemical oceanography
Collaborative science workflows in SQL
SQLShare is a Web-based application that emphasizes a simple upload-query-share protocol over conventional database design and uses ad …
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Collaborative science workflows in SQL
Seaflow: A novel underway flow-cytometer for continuous observations of phytoplankton in the ocean
Current automated flow cytometers primarily target the dynamics of phytoplankton communities in coastal environments and lack the …
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Seaflow: A novel underway flow-cytometer for continuous observations of phytoplankton in the ocean
flowPhyto: Enabling automated analysis of microscopic algae from continuous flow cytometric data
Motivation: Flow cytometry is a widely used technique among biologists to study the abundances of populations of microscopic algae …
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flowPhyto: Enabling automated analysis of microscopic algae from continuous flow cytometric data
Unveiling a phytoplankton hotspot at a narrow boundary between coastal and offshore waters
In terrestrial ecosystems, transitional areas between different plant communities (ecotones) are formed by steep environmental …
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Unveiling a phytoplankton hotspot at a narrow boundary between coastal and offshore waters
High plasticity in the production of diatom-derived polyunsaturated aldehydes under nutrient limitation: physiological and ecological implications
Diatoms have evolved a silicified cell wall that provides an efficient barrier against herbivores. These microalgae also produce …
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High plasticity in the production of diatom-derived polyunsaturated aldehydes under nutrient limitation: physiological and ecological implications
Ferritin is used for iron storage in bloom-forming marine pennate diatoms
Primary productivity in 30-40% of the world’s oceans is limited by availability of the micronutrient iron. Regions with …
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Ferritin is used for iron storage in bloom-forming marine pennate diatoms
Differential effect of three polyunsaturated aldehydes on marine bacterial isolates
Bioactive polyunsaturated aldehydes (PUAs) are produced by several marine phytoplankton (mainly diatoms) and have been shown to have a …
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Differential effect of three polyunsaturated aldehydes on marine bacterial isolates
Growth inhibition of cultured marine phytoplankton by toxic algal-derived polyunsaturated aldehydes
Several marine diatoms produce polyunsaturated aldehydes (PUAs) that have been shown to be toxic to a wide variety of model organisms, …
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Growth inhibition of cultured marine phytoplankton by toxic algal-derived polyunsaturated aldehydes
Age and nutrient limitation enhance polyunsaturated aldehyde production in marine diatoms
Skeletonema marinoi produces 2,4-heptadienal, 2,4-octadienal, and 2,4,7-octatrienal, the latter only in traces. In nutrient-replete …
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Age and nutrient limitation enhance polyunsaturated aldehyde production in marine diatoms
A stress surveillance system based on calcium and nitric oxide in marine diatoms
Diatoms are an important group of eukaryotic phytoplankton, responsible for about 20% of global primary productivity. Study of the …
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A stress surveillance system based on calcium and nitric oxide in marine diatoms