Results 41 to 50 of about 11,377 (264)

Weighing the deep continental biosphere [PDF]

FEMS Microbiology Ecology, 2013
There is abundant evidence for widespread microbial activity in deep continental fractures and aquifers, with important implications for biogeochemical cycling on Earth and the habitability of other planetary bodies. Whitman et al. (P Natl Acad Sci USA, 95, 1998, 6578) estimated a continental subsurface biomass on the order of 10(16) -10(17) g C.
Sean, McMahon, John, Parnell
openaire   +2 more sources

The Deep Hot Biosphere [PDF]

Eos, Transactions American Geophysical Union, 1999
The first inhabitants of planet Earth were single‐celled microorganisms and they are still with us today. Their name is truly legion, for they live everywhere, from boiling hot springs at the Earth's surface and on the seafloor to the coldest waters of the oceans and the Antarctic lakes.
  +4 more sources

Contamination tracer testing with seabed drills: IODP Expedition 357 [PDF]

Scientific Drilling, 2017
IODP Expedition 357 utilized seabed drills for the first time in the history of the ocean drilling program, with the aim of collecting intact sequences of shallow mantle core from the Atlantis Massif to examine serpentinization processes and the deep ...
B. N. Orcutt, M. Bergenthal, T. Freudenthal, D. Smith, M. D. Lilley, L. Schnieders, S. Green, G. L. Früh-Green   +7 more
doaj   +1 more source

Sampling across large-scale geological gradients to study geosphere–biosphere interactions

Frontiers in Microbiology, 2022
Despite being one of the largest microbial ecosystems on Earth, many basic open questions remain about how life exists and thrives in the deep subsurface biosphere.
Donato Giovannelli, Donato Giovannelli, Donato Giovannelli, Donato Giovannelli, Donato Giovannelli, Peter H. Barry, J. Maarten de Moor, J. Maarten de Moor, Gerdhard L. Jessen, Gerdhard L. Jessen, Matthew O. Schrenk, Karen G. Lloyd   +11 more
doaj   +1 more source

The hadal zone is an important and heterogeneous sink of black carbon in the ocean

Communications Earth & Environment, 2022
Black carbon accumulation rates in hadal trenches in the deepest regions of the oceans could be seven-fold higher than the global ocean average, according to geochemical and isotopic analyses of sediments from six trenches in the Pacific Ocean.
Xi Zhang, Yunping Xu, Wenjie Xiao, Meixun Zhao, Zicheng Wang, Xuchen Wang, Liping Xu, Min Luo, Xinxin Li, Jiasong Fang, Yin Fang, Yasong Wang, Kazumasa Oguri, Frank Wenzhöfer, Ashley A. Rowden, Siddhartha Mitra, Ronnie N. Glud   +16 more
doaj   +1 more source

Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield

Nature Communications, 2022
Dissolved organic matter in the Fennoscandian Shield deep continental bedrock fracture waters of varying characteristics and ages carries a strong terrigenous signature, and only a small proportion of this potential energy source links to the deep ...
Helena Osterholz, Stephanie Turner, Linda J. Alakangas, Eva-Lena Tullborg, Thorsten Dittmar, Birgitta E. Kalinowski, Mark Dopson   +6 more
doaj   +1 more source

Activity and abundance of denitrifying bacteria in the subsurface biosphere of diffuse hydrothermal vents of the Juan de Fuca Ridge [PDF]

, 2012
Little is known about fixed nitrogen (N) transformation and elimination at diffuse hydrothermal vents where anoxic fluids are mixed with oxygenated crustal seawater prior to discharge.
G. Lavik, Lehmann, M. F., Murdock, S.A., A. H. Devol, Devol, A.H., Wenk, C. B., Hallam, S.J., Bourbonnais, A., Kuypers, M. M. M., Hallam, S. J., Chang, B.X., Devol, A. H., S. J. Hallam, M. M. M. Kuypers, Butterfield, D.A., Kuypers, M.M.M., M. F. Lehmann, Juniper, S. Kim, Juniper, S. K., Chang, B. X., Lehmann, M.F., B. X. Chang, Murdock, S. A., D. A. Butterfield, Butterfield, D. A., A. Bourbonnais, Lavik, G., S. K. Juniper, C. B. Wenk, Wenk, C.B., S. A. Murdock   +30 more
core   +1 more source

Advancing subsurface biosphere and paleoclimate research: ECORD–ICDP–DCO–J-DESC–MagellanPlus Workshop Series Program Report [PDF]

Scientific Drilling, 2015
The proper pre-drilling preparation, on-site acquisition and post-drilling preservation of high-quality subsurface samples are crucial to ensure significant progress in the scientifically and societally important areas of subsurface biosphere and ...
H. J. Mills, J. de Leeuw, K.-U. Hinrichs, F. Inagaki, J. Kallmeyer   +4 more
doaj   +1 more source

High frequency of phylogenetically diverse reductive dehalogenase-homologous genes in deep subseafloor sedimentary metagenomes

Frontiers in Microbiology, 2014
Marine subsurface sediments on the Pacific margin harbor diverse microbial communities even at depths of several hundreds meters below the seafloor (mbsf) or more.
Mikihiko eKawai, Mikihiko eKawai, Taiki eFutagami, Taiki eFutagami, Atsushi eToyoda, Yoshihiro eTakaki, Shinro eNishi, Sayaka eHori, Wataru eArai, Taishi eTsubouchi, Yuki eMorono, Yuki eMorono, Ikuo eUchiyama, Takehiko eItoh, Asao eFujiyama, Fumio eInagaki, Fumio eInagaki, Hideto eTakami   +17 more
doaj   +1 more source

Using Cathodic Poised Potential Experiments to Investigate Extracellular Electron Transport in the Crustal Deep Biosphere of North Pond, Mid-Atlantic Ridge

Frontiers in Environmental Science, 2020
The crustal sub-seafloor covers a large portion of the Earth’s surface but is poorly understood as a habitat for life. It is unclear what metabolisms support the microscopic cells that have been observed, and how they survive under resource limitation ...
Rose M. Jones, Rose M. Jones, Timothy D’Angelo, Beth N. Orcutt   +3 more
doaj   +1 more source