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The overarching goal of my research is to elucidate the role of microorganisms and microbial communities in driving major biogeochemical cycles. The microbial biosphere harbors an incredible diversity of traits that impact marine ecosystem function. Unraveling microbial interdependencies and interactions that modulate marine elemental cycling will be necessary to more precisely evaluate the response of ecosystems to natural and anthropogenic perturbations. My research pairs computational genomics approaches with model systems of microbial ecology and evolution. By combining pattern identification and physiological experimentation, key questions can be constrained and then rigorously tested in the laboratory and the field. In this way, my work has extended our knowledge of the diverse roles of microorganisms in elemental cycling and how microbial interactions might regulate ocean biogeochemistry.
At MIT, I study the marine cyanobacterium, Prochlorococcus, a well developed model system for studying microbial ecology. This organism has proven to be an ideal tool for exploring my questions on how microbial diversity and function can impact ocean biogeochemistry. When Prochlorococcus was first isolated and the first Prochlorococcus genomes were sequenced, an unusual lack of the nitrate assimilation pathway was observed. The absence of this pathway in such a large standing stock of phytoplankton was surprising, especially given that nitrate is often the most abundant nitrogen source and nitrogen typically limits phytoplankton growth in vast regions of the ocean. Utilizing computational approaches (e.g. comparative genomics and metagenomics) combined with microbial physiology and ecology studies, I have found that a significant fraction of Prochlorococcus in the wild are capable of nitrate assimilation and that overall nitrogen limitation is an important factor in selecting for these cells.
At MIT, I study the marine cyanobacterium, Prochlorococcus, a well developed model system for studying microbial ecology. This organism has proven to be an ideal tool for exploring my questions on how microbial diversity and function can impact ocean biogeochemistry. When Prochlorococcus was first isolated and the first Prochlorococcus genomes were sequenced, an unusual lack of the nitrate assimilation pathway was observed. The absence of this pathway in such a large standing stock of phytoplankton was surprising, especially given that nitrate is often the most abundant nitrogen source and nitrogen typically limits phytoplankton growth in vast regions of the ocean. Utilizing computational approaches (e.g. comparative genomics and metagenomics) combined with microbial physiology and ecology studies, I have found that a significant fraction of Prochlorococcus in the wild are capable of nitrate assimilation and that overall nitrogen limitation is an important factor in selecting for these cells.
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mBiono. 4 (2023): e0123623-e0123623
MBio (2023)
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Jamie W. Becker,Shaul Pollak, Jessie W. Berta-Thompson,Kevin W. Becker,Rogier Braakman, Keven D. Dooley,Thomas Hackl,Allison Coe,Aldo Arellano,Kristen N. LeGault,Paul M. Berube,Steven J. Biller,
biorxiv(2023)
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Proceedings of the National Academy of Sciences of the United States of Americano. 11 (2022)
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