K
Karen G. Lloyd
Researcher at University of Tennessee
Publications - 95
Citations - 5440
Karen G. Lloyd is an academic researcher from University of Tennessee. The author has contributed to research in topics: Medicine & Archaea. The author has an hindex of 29, co-authored 72 publications receiving 4235 citations. Previous affiliations of Karen G. Lloyd include University College London & Aarhus University.
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Journal ArticleDOI
Heterotrophic Archaea dominate sedimentary subsurface ecosystems off Peru
Jennifer F. Biddle,Julius S. Lipp,Mark A. Lever,Karen G. Lloyd,Ketil Bernt Sørensen,Rika E. Anderson,Rika E. Anderson,Helen F. Fredricks,Marcus Elvert,Timothy J. Kelly,Daniel P. Schrag,Mitchell L. Sogin,Jean E. Brenchley,Andreas P Teske,Christopher H. House,Kai-Uwe Hinrichs,Kai-Uwe Hinrichs +16 more
TL;DR: It is shown that extractable archaeal rRNA, selecting only for active community members in these ecosystems, is dominated by sequences of uncultivated Archaea affiliated with the Marine Benthic Group B and the Miscellaneous Crenarchaeotal Group, whereas known methanotrophic Archaea are not detectable.
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Predominant archaea in marine sediments degrade detrital proteins
Karen G. Lloyd,Lars Schreiber,Dorthe Groth Petersen,Kasper Urup Kjeldsen,Mark A. Lever,Andrew D. Steen,Ramunas Stepanauskas,Michael Richter,Sara Kleindienst,Sabine Lenk,Andreas Schramm,Bo Barker Jørgensen +11 more
TL;DR: It is shown that the uncultured miscellaneous crenarchaeotal group (MCG) and marine benthic group-D (MBG-D) are among the most numerous archaea in the marine sub-sea floor and may have a previously undiscovered role in protein remineralization in anoxic marine sediments.
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Life under extreme energy limitation: a synthesis of laboratory- and field-based investigations.
Mark A. Lever,Karyn L. Rogers,Karen G. Lloyd,Jörg Overmann,Bernhard Schink,Rudolf K. Thauer,Tori M. Hoehler,Bo Barker Jørgensen +7 more
TL;DR: Past investigations on microbial energy requirements and adaptations to energy limitation, identify gaps in current knowledge, and outline possible future foci of research on life under extreme energy limitation are discussed.
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Phylogenetically novel uncultured microbial cells dominate Earth microbiomes
TL;DR: It is shown that uncultured microbes, often from deeply phylogenetically divergent groups, dominate nonhuman environments on Earth, and their undiscovered physiologies may matter for Earth systems.
Journal ArticleDOI
Archaea of the Miscellaneous Crenarchaeotal Group are abundant, diverse and widespread in marine sediments
Kyoko Kubo,Karen G. Lloyd,Karen G. Lloyd,Karen G. Lloyd,Jennifer F. Biddle,Jennifer F. Biddle,Rudolf Amann,Andreas P Teske,Katrin Knittel +8 more
TL;DR: Members of the highly diverse Miscellaneous Crenarchaeotal Group (MCG) are globally distributed in various marine and continental habitats and their high diversity and widespread distribution in subsurface sediments indicates that this group is globally important in sedimentary processes.