User profiles for A. D. Steen

Andrew Decker Steen

Associate Professor of Microbiology and Earth and Planetary Science, University of …
Verified email at utk.edu
Cited by 2960

[HTML][HTML] Roadmap for naming uncultivated Archaea and Bacteria

…, C Pedrós-Alió, AJ Probst, THM Smits, AD Steen… - Nature …, 2020 - nature.com
… Consequently, an ICSP ad hoc committee was appointed in … Several years later, in 1987
and 1990, two ad hoc committees … In 2002, a fourth ad hoc committee revisited the species …

The fate of organic carbon in marine sediments-New insights from recent data and analysis

…, N Mahmoudi, WD Orsi, SRS Walter, AD Steen… - Earth-Science …, 2020 - Elsevier
Organic carbon in marine sediments is a critical component of the global carbon cycle, and
its degradation influences a wide range of phenomena, including the magnitude of carbon …

Predominant archaea in marine sediments degrade detrital proteins

…, DG Petersen, KU Kjeldsen, MA Lever, AD Steen… - Nature, 2013 - nature.com
Half of the microbial cells in the Earth’s oceans are found in sediments 1 . Many of these cells
are members of the Archaea 2 , single-celled prokaryotes in a domain of life separate from …

High proportions of bacteria and archaea across most biomes remain uncultured

AD Steen, A Crits-Christoph, P Carini… - The ISME …, 2019 - academic.oup.com
Advertisement intended for healthcare professionals … Advertisement intended for
healthcare professionals Advertisement intended for healthcare professionals …

Phylogenetically novel uncultured microbial cells dominate earth microbiomes

KG Lloyd, AD Steen, J Ladau, J Yin, L Crosby - MSystems, 2018 - Am Soc Microbiol
To describe a microbe’s physiology, including its metabolism, environmental roles, and
growth characteristics, it must be grown in a laboratory culture. Unfortunately, many …

Verrucomicrobia are candidates for polysaccharide-degrading bacterioplankton in an arctic fjord of Svalbard

…, A Durbin, K Ziervogel, C Cox, AD Steen… - Applied and …, 2014 - Am Soc Microbiol
In Arctic marine bacterial communities, members of the phylum Verrucomicrobia are
consistently detected, although not typically abundant, in 16S rRNA gene clone libraries and …

Biogeochemistry of Earth before exoenzymes

N Mahmoudi, AD Steen, GP Halverson… - Nature …, 2023 - nature.com
ADS was supported by NSF grant numbers OPP-2147046 and OCE- 2145434. We thank A.
… NM and ADS conceptualized the Perspective. All authors extensively contributed ideas and …

Extracellular enzymes in terrestrial, freshwater, and marine environments: perspectives on system variability and common research needs

…, C Bell, DL Moorhead, RL Sinsabaugh, AD Steen… - Biogeochemistry, 2014 - Springer
Extracellular enzymes produced by heterotrophic microbial communities are major drivers
of carbon and nutrient cycling in terrestrial, freshwater, and marine environments. Although …

Understanding electrochemically activated persulfate and its application to ciprofloxacin abatement

…, MJ Tipton, AT Farmer, AD Steen… - … science & technology, 2018 - ACS Publications
This study offers insight into the roles anodic and cathodic processes play in electrochemically
activated persulfate (EAP) and screens EAP as a viable technique for ciprofloxacin …

Meta-analysis of quantification methods shows that archaea and bacteria have similar abundances in the subseafloor

…, MK May, RT Kevorkian, AD Steen - Applied and …, 2013 - Am Soc Microbiol
There is no universally accepted method to quantify bacteria and archaea in seawater and
marine sediments, and different methods have produced conflicting results with the same …