The biological pump plays a vital role in exporting organic particles into the deep ocean for long-term carbon sequestration. However, much remains unknown about some of its key microbial players. In this study, Labyrinthulomycetes protists (LP) were used to understand the significance of heterotrophic microeukaryotes in the transport of particulate […]
Zackary Johnson
68 posts
Using a commercially scalable system designed for processing thousands of liters a day, here we evaluated the factors that affected the performance, energy consumption and capital/operating costs of both flocculation-based and filtration-based algal harvesting systems over a 16 month period. Coagulation efficiency was the primary driver of harvest efficiency in the […]
The Galápagos Archipelago lies within the Eastern Equatorial Pacific Ocean at the convergence of major ocean currents that are subject to changes in circulation. The nutrient-rich Equatorial Undercurrent upwells from the west onto the Galápagos platform, stimulating primary production, but this source of deep water weakens during El Niño events. […]
In memory of Joe Bonaventura, a long time faculty member at the Duke Marine Laboratory and inspiration to so many, a crab pot Christmas Tree (a distinct eastern NC tradition) was decorated by the Johnson Lab and shown as part of the Crystal Coast Hospice 2021 Gingerbread Festival. The tree […]
As part of the Duke University Marine Laboratory produced “Seas the Day” podcast series, Junyao lead the latest episode “Navigating the Choppy Waters of the US PhD Application Process” In this episode, she interviewed five PhD students and the doctoral program coordinator, to learn about the biggest challenges of applying […]
Dr. Johnson received the Algae Biomass Organization Mid-Career Excellence Award – For excellence in scholarly achievements and a record of productive, independent, and impactful peer-reviewed research and creative scholarship activities “Dr. Johnson has made vast contributions to the peer-reviewed literature in areas associated with microalgae cultivation, oceanography, molecular ecology, and microbiology genetics. […]
Expanding markets for microalgae and macroalgae products have led to increased development of commercial farming operations. While microalgae and macroalgae, or seaweed, have historically been harvested in many parts of the globe, more recent developments seek to improve productivity, decrease production costs, increase scale, and mitigate environmental impacts of cultivation. […]
The biological pump plays a vital role in exporting organic particles into the deep ocean for long-term carbon sequestration. However, much remains unknown about some of its key microbial players. In this study, Labyrinthulomycetes protists (LP) were used to understand the significance of heterotrophic microeukaryotes in the transport of particulate […]
This study determined effects of full-fatted (C046, 41% crude protein) and lipid extracted (LEA, 39% crude protein) microalgae Desmodesmus sp. on growth performance, gut health, and excreta hydrothermal liquefaction of broiler chickens. Two experiments were conducted by feeding day-old Cornish male chicks: 1) a corn-soybean meal basal diet (control) 2) […]
The database on ocean primary productivity comprises over two decades (1985–2008) of data that the authors have participated in collecting, using the assimilation of inorganic 14C through photosynthesis, in incubations carried out in situ. The dataset is perhaps unique in that it uses, overwhelmingly, consistent methodology while covering a wide geographic […]