K
Kathryn J. Roberts
Researcher at Stanford University
Publications - 4
Citations - 2412
Kathryn J. Roberts is an academic researcher from Stanford University. The author has contributed to research in topics: Archaea & Nitrification. The author has an hindex of 4, co-authored 4 publications receiving 2159 citations.
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Journal ArticleDOI
Ubiquity and diversity of ammonia-oxidizing archaea in water columns and sediments of the ocean
Christopher A. Francis,Kathryn J. Roberts,J. Michael Beman,Alyson E. Santoro,Brian B. Oakley +4 more
TL;DR: Using PCR primers designed to specifically target archaeal amoA, AOA is found to be pervasive in areas of the ocean that are critical for the global nitrogen cycle, including the base of the euphotic zone, suboxic water columns, and estuarine and coastal sediments.
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Distribution and Diversity of Archaeal Ammonia Monooxygenase Genes Associated with Corals
TL;DR: The 210 coral-associated archaeal amoA sequences recovered in this study were broadly distributed phylogenetically, with most only distantly related to previously reported sequences from coastal/estuarine sediments and oceanic water columns.
Journal ArticleDOI
Analysis of nitrite reductase (nirK and nirS) genes and cultivation reveal depauperate community of denitrifying bacteria in the Black Sea suboxic zone
Brian B. Oakley,Christopher A. Francis,Kathryn J. Roberts,Clara A. Fuchsman,Sujatha Srinivasan,James T. Staley +5 more
TL;DR: Analysis of the recently discovered nirS gene from the anammox bacterium Candidatus'Kuenenia stuttgartiensis' revealed that mismatches with commonly used primers may have prevented the previous detection of this divergent sequence, which appears to harbour a homogeneous community of denitrifiers.
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Toxic diatoms and domoic acid in natural and iron enriched waters of the oceanic Pacific
Mary W. Silver,Sibel Bargu,Susan L. Coale,Claudia R. Benitez-Nelson,Ana C. Garcia,Kathryn J. Roberts,Emily Sekula-Wood,Kenneth W. Bruland,Kenneth H. Coale +8 more
TL;DR: The neurotoxin DA occurs both in coastal and oceanic waters, and its concentration, associated with changes in Pseudo-nitzschia abundance, likely varies naturally with climate cycles, as well as with artificial iron fertilization.