• Ammonia-oxidizing archaea have similar power requirements in diverse marine oxic sediments 

      Zhao, Rui; Mogollon, Jose M; Roerdink, Desiree Lisette; Thorseth, Ingunn Hindenes; Økland, Ingeborg Elisabet; Jørgensen, Steffen Leth (Journal article; Peer reviewed, 2021)
      Energy/power availability is regarded as one of the ultimate controlling factors of microbial abundance in the deep biosphere, where fewer cells are found in habitats of lower energy availability. A critical assumption ...
    • Chlamydial contribution to anaerobic metabolism during eukaryotic evolution 

      Stairs, Courtney W.; Sharamshi, Jennah E.; Tamarit, Daniel; Eme, Laura; Jørgensen, Steffen Leth; Spang, Anja; Ettema, Thijs J.G. (Journal article; Peer reviewed, 2020)
      The origin of eukaryotes is a major open question in evolutionary biology. Multiple hypotheses posit that eukaryotes likely evolved from a syntrophic relationship between an archaeon and an alphaproteobacterium based on ...
    • CREST – Classification Resources for Environmental Sequence Tags 

      Lanzén, Anders; Jørgensen, Steffen Leth; Huson, Daniel H.; Gorfer, Markus; Grindhaug, Svenn Helge; Jonassen, Inge; Øvreås, Lise; Urich, Tim (Peer reviewed; Journal article, 2012-11-08)
      Sequencing of taxonomic or phylogenetic markers is becoming a fast and efficient method for studying environmental microbial communities. This has resulted in a steadily growing collection of marker sequences, most notably ...
    • Design of the subsurface observatory at Surtsey volcano, Iceland 

      Türke, Andreas; Jackson, Marie D; Bach, Wolfgang; Kahl, Wolf-Achim; Grzybowski, Brian; Marshall, Beau; Gudmundsson, Magnus T.; Jørgensen, Steffen Leth (Peer reviewed; Journal article, 2019-06-12)
      Surtsey, the youngest of the islands of Vestmannaeyjar, is an oceanic volcano created by explosive basaltic eruptions during 1963–1967 off the southern coast of Iceland. The subsurface deposits of the volcano were first ...
    • Geochemical transition zone powering microbial growth in subsurface sediments 

      Zhao, Rui; Mogollon, Jose M; Abby, Sophie; Schleper, Christa; Biddle, Jennifer; Roerdink, Desiree; Thorseth, Ingunn Hindenes; Jørgensen, Steffen Leth (Journal article; Peer reviewed, 2020)
      No other environment hosts as many microbial cells as the marine sedimentary biosphere. While the majority of these cells are expected to be alive, they are speculated to be persisting in a state of maintenance without net ...
    • Indigenous Ammonia-Oxidizing Archaea in Oxic Subseafloor Oceanic Crust 

      Zhao, Rui; Dahle, Håkon; Ramírez, Gustavo A.; Jørgensen, Steffen Leth (Journal article, 2020-03-10)
      Oceanic ridge flank systems represent one of the largest and leastexplored microbial habitats on Earth. Fundamental ecological questions regarding community activity, recruitment, and succession in this environment remain ...
    • Microbial community structure in Arctic lake sediments reflect variations in Holocene climate conditions 

      Møller, Tor Einar; Van Der Bilt, Willem; Roerdink, Desiree; Jørgensen, Steffen Leth (Journal article; Peer reviewed, 2020)
      The reconstruction of past climate variability using physical and geochemical parameters from lake sedimentary records is a well-established and widely used approach. These geological records are also known to contain large ...
    • Microbial inventory of deeply buried oceanic crust from a young ridge flank 

      Jørgensen, Steffen Leth; Zhao, Rui (Peer reviewed; Journal article, 2016-05-27)
      The deep marine biosphere has over the past decades been exposed as an immense habitat for microorganisms with wide-reaching implications for our understanding of life on Earth. Recent advances in knowledge concerning this ...
    • The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges 

      Hestetun, Jon Thomassen; Dahle, Håkon; Jørgensen, Steffen Leth; Olsen, Bernt Rydland; Rapp, Hans Tore (Peer reviewed; Journal article, 2016-11-09)
      As shown by recent studies, filter-feeding sponges are known to host a wide variety of microorganisms. However, the microbial community of the non-filtering carnivorous sponges (Porifera, Cladorhizidae) has been the subject ...
    • Nitrifier abundance and diversity peak at deep redox transition zones 

      Zhao, Rui; Hannisdal, Bjarte; Mogollon, Josè M.; Jørgensen, Steffen Leth (Peer reviewed; Journal article, 2019-06-14)
      More than half of the global ocean floor is draped by nutrient-starved sediments characterized by deep oxygen penetration and a prevalence of oxidized nitrogen. Despite low energy availability, this habitat hosts a vast ...
    • SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruption 

      Jackson, Marie D.; Gudmundsson, Magnús T.; Weisenberger, Tobias B.; Rhodes, J. Michael; Stefánsson, Andri; Kleine, Barbara I.; Lippert, Peter C.; Marquardt, Joshua M.; Reynolds, Hannah I.; Kück, Jochem; Marteinsson, Viggó T.; Vannier, Pauline; Bach, Wolfgang; Barich, Amel; Bergsten, Pauline; Bryce, Julia G.; Cappelletti, Piergiulio; Couper, Samantha; Fahnestock, M. Florencia; Gorny, Carolyn F.; Grimaldi, Carla; Groh, Marco; Gudmundsson, Ágúst; Gunnlaugsson, Ágúst T.; Hamlin, Cédric; Högnadóttir, Thórdis; Jónasson, Kristján; Jónsson, Sigurdur S.; Jørgensen, Steffen Leth; Klonowski, Alexandra M.; Marshall, Beau; Massey, Erica; McPhie, Jocelyn; Moore, James G.; Ólafsson, Einar S.; Onstad, Solveig L.; Perez, Velveth; Prause, Simon; Snorrason, Snorri P.; Türke, Andreas; White, James D.L.; Zimanowski, Bernd (Journal article; Peer reviewed, 2019-06-12)
      The 2017 Surtsey Underwater volcanic System for Thermophiles, Alteration processes and INnovative concretes (SUSTAIN) drilling project at Surtsey volcano, sponsored in part by the International Continental Scientific ...
    • Time-lapse characterization of hydrothermal seawater and microbial interactions with basaltic tephra at Surtsey volcano 

      Jackson, M.D; Gudmundsson, M T; Bach, Wolfgang; Cappelletti, P.; Coleman, N. J.; Ivarsson, M.; Jonasson, K; Jørgensen, Steffen Leth; Marteinsson, V.; McPhie, J,; Moore, J. G.; Nielson, D.; Rhodes, J. M.; Rispoli, C.; Schiffman, Peter; Stefánsson, A.; Türke, A.; Vanorio, T.; Weisenberger, T. B.; White, J. D. L.; Zierenberg, R.; Zimanowski, B. (Peer reviewed; Journal article, 2015-12-17)
      A new International Continental Drilling Program (ICDP) project will drill through the 50-year-old edifice of Surtsey Volcano, the youngest of the Vestmannaeyjar Islands along the south coast of Iceland, to perform ...
    • Virus Genomes from Deep Sea Sediments Expand the Ocean Megavirome and Support Independent Origins of Viral Gigantism 

      Bäckström, Disa; Yutin, Natalya; Jørgensen, Steffen Leth; Dharamshi, Jennah; Homa, Felix; Zaremba-Niedwiedzka, Katarzyna; Spang, Anja; Wolf, Yuri I.; Koonin, Eugene V.; Ettema, Thijs J.G. (Journal article; Peer reviewed, 2019)
      The nucleocytoplasmic large DNA viruses (NCLDV) of eukaryotes (proposed order, “Megavirales”) include the families Poxviridae, Asfarviridae, Iridoviridae, Ascoviridae, Phycodnaviridae, Marseilleviridae, and Mimiviridae, ...