Demory David

Demory David
Georgia Institute of Technology | GT · School of Biology

PhD

About

17
Publications
3,879
Reads
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358
Citations
Citations since 2016
16 Research Items
358 Citations
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2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Introduction
My main research interest lies in understanding the ecology of phytoplankton communities and viruses using different tools from lab to mathematical modeling.
Additional affiliations
October 2017 - present
Georgia Institute of Technology
Position
  • PostDoc Position
Education
December 2013 - January 2017
Pierre and Marie Curie University - INRIA - SBR - LOV
Field of study
  • Oceanography, Experimental and Modeling
September 2012 - September 2013
Sorbonne Université
Field of study
  • Oceanography and Modeling
September 2011 - September 2012
Université du Québec à Rimouski UQAR
Field of study
  • Oceanography

Publications

Publications (17)
Preprint
Full-text available
Marine Synechococcus comprise a numerically and ecologically prominent phytoplankton group, playing a major role in both carbon cycling and trophic networks in all oceanic regions except in the polar oceans. Despite their high abundance in coastal areas, our knowledge of Synechococcus communities in these environments is based on only a few local s...
Article
Full-text available
Serological testing remains a passive component of the public health response to the COVID-19 pandemic. Using a transmission model, we examine how serological testing could have enabled seropositive individuals to increase their relative levels of social interaction while offsetting transmission risks. We simulate widespread serological testing in...
Preprint
Full-text available
Marine ecosystem models often consider temporal dynamics on the order of months to years, and spatial dynamics over regional and global scales as a means to understand the ecology, evolution, and biogeochemical impacts of marine life. Large-scale dynamics are themselves driven over diel scales as a result of light-driven forcing, feedback, and inte...
Article
Full-text available
Marine viruses interact with microbial hosts in dynamic environments shaped by variation in abiotic factors, including temperature. However, the impacts of temperature on viral infection of phytoplankton are not well understood. Here we coupled mathematical modelling with experiments to explore the effect of temperature on virus‐phytoplankton inter...
Preprint
Full-text available
Marine viruses interact with their microbial hosts in dynamic environments shaped by variations in abiotic factors, including temperature. However, the impacts of temperature on viral infection of phytoplankton are not well understood. Here we coupled mathematical modeling with experimental datasets to explore the effect of temperature on three Mic...
Article
Full-text available
The COVID-19 pandemic has precipitated a global crisis, with more than 1,430,000 confirmed cases and more than 85,000 confirmed deaths globally as of 9 April 20201,2,3,4. Mitigation and suppression of new infections have emerged as the two predominant public health control strategies⁵. Both strategies focus on reducing new infections by limiting hu...
Preprint
Full-text available
The COVID-19 pandemic has precipitated a global crisis, with more than 690,000 confirmed cases and more than 33,000 confirmed deaths globally as of March 30, 2020 [1-4]. At present two central public health control strategies have emerged: mitigation and suppression (e.g, [5]). Both strategies focus on reducing new infections by reducing interactio...
Article
Full-text available
The cyanobacterium Prochlorococcus is an essential member of global ocean ecosystems. Light rhythms drive Prochlorococcus photosynthesis, ecology, and interactions with potentially lethal viruses. At present, the impact of light on Prochlorococcus -virus interactions is not well understood. Here, we analyzed Prochlorococcus and virus population dyn...
Article
The wide latitudinal distribution of marine Synechococcus cyanobacteria partly relies on the differentiation of lineages adapted to distinct thermal environments. Membranes are highly thermosensitive cell components and the ability to modulate their fluidity can be critical for the fitness of an ecotype in a particular thermal niche. We compared th...
Preprint
Full-text available
Prochlorococcus grow in diurnal rhythms driven by diel cycles. Their ecology depends on light, nutrients, and top-down mortality processes including lysis by viruses. Cyanophage, viruses that infect cyanobacteria, are also impacted by light. For example, extracellular viability and intracell infection kinetics of some cyanophage vary between light...
Article
Full-text available
Photosynthetic picoeukaryotes in the genus Micromonas show among the widest latitudinal distributions on Earth, experiencing large thermal gradients from poles to tropics. Micromonas comprises at least four different species often found in sympatry. While such ubiquity might suggest a wide thermal niche, the temperature response of the different st...
Article
Full-text available
Hydrodynamics in a high-rate production reactor for microalgae cultivation affects the light history perceived by cells. The interplay between cell movement and medium turbidity leads to a complex light pattern, whose forcing effects on photosynthesis and photoacclimation dynamics are non-trivial. Hydrodynamics of high density algal ponds mixed by...
Thesis
Full-text available
Les dérèglements climatiques engendrés par l’activité anthropique vont fortement perturber les écosystèmes naturels dans un futur proche. Les écosystèmes marins, déjà soumis à la forte variabilité de leur environnement, sont donc fortement menacés. Au sein de ces communautés, le phytoplancton a un rôle primordial dans les réseaux trophiques, ainsi...
Article
Full-text available
The genus Micromonas comprises phytoplankton that show among the widest latitudinal distributions on Earth, and members of this genus are recurrently infected by prasinoviruses in contrasted thermal ecosystems. In this study, we assessed how temperature influences the interplay between the main genetic clades of this prominent microalga and their v...
Article
Full-text available
Microalgae mass cultiviation is a promising future source of biomass for energy and food production. In order to optimize productivity of large scale plants and to make them environmentally and economically sustainable, energy requirements have to be minimized. In particular, mixing of the growth medium is a major energy input, and its effect on ov...

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