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Recycling and metabolic flexibility dictate life in the lower oceanic crust 期刊论文
NATURE, 2020, 579 (7798) : 250-+
作者:  Zhou, Peng;  Yang, Xing-Lou;  Wang, Xian-Guang;  Hu, Ben;  Zhang, Lei;  Zhang, Wei;  Si, Hao-Rui;  Zhu, Yan;  Li, Bei;  Huang, Chao-Lin;  Chen, Hui-Dong;  Chen, Jing;  Luo, Yun;  Guo, Hua;  Jiang, Ren-Di;  Liu, Mei-Qin;  Chen, Ying;  Shen, Xu-Rui;  Wang, Xi;  Zheng, Xiao-Shuang;  Zhao, Kai;  Chen, Quan-Jiao;  Deng, Fei;  Liu, Lin-Lin;  Yan, Bing;  Zhan, Fa-Xian;  Wang, Yan-Yi;  Xiao, Geng-Fu;  Shi, Zheng-Li
收藏  |  浏览/下载：60/0  |  提交时间：2020/05/13

The lithified lower oceanic crust is one of Earth'  s last biological frontiers as it is difficult to access. It is challenging for microbiota that live in marine subsurface sediments or igneous basement to obtain sufficient carbon resources and energy to support growth(1-3) or to meet basal power requirements(4) during periods of resource scarcity. Here we show how limited and unpredictable sources of carbon and energy dictate survival strategies used by low-biomass microbial communities that live 10-750 m below the seafloor at Atlantis Bank, Indian Ocean, where Earth'  s lower crust is exposed at the seafloor. Assays of enzyme activities, lipid biomarkers, marker genes and microscopy indicate heterogeneously distributed and viable biomass with ultralow cell densities (fewer than 2,000 cells per cm(3)). Expression of genes involved in unexpected heterotrophic processes includes those with a role in the degradation of polyaromatic hydrocarbons, use of polyhydroxyalkanoates as carbon-storage molecules and recycling of amino acids to produce compounds that can participate in redox reactions and energy production. Our study provides insights into how microorganisms in the plutonic crust are able to survive within fractures or porous substrates by coupling sources of energy to organic and inorganic carbon resources that are probably delivered through the circulation of subseafloor fluids or seawater.


  
Nitrogen Exsolution and Bubble Formation in Titan's Lakes 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (23) : 13658-13667
作者:  Farnsworth, Kendra K.;  Chevrier, Vincent F.;  Steckloff, Jordan K.;  Laxton, Dustin;  Singh, Sandeep;  Soto, Alejandro;  Soderblom, Jason M.
收藏  |  浏览/下载：12/0  |  提交时间：2020/02/17
Titan  bubbles  nitrogen exsolution  Titan liquid hydrocarbons  surface  atmosphere interactions  
Oxygen Isotopes (delta O-18) Trace Photochemical Hydrocarbon Oxidation at the Sea Surface 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (12) : 6745-6754
作者:  Ward, Collin P.;  Sharpless, Charles M.;  Valentine, David L.;  Aeppli, Christoph;  Sutherland, Kevin M.;  Wankel, Scott D.;  Reddy, Christopher M.
收藏  |  浏览/下载：12/0  |  提交时间：2019/11/26
petroleum hydrocarbons  photochemical oxidation  Deepwater Horizon  stable oxygen isotopes  organic carbon  
Limited Retention of Wildfire-Derived PAHs and Trace Elements in Indoor Environments 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (1) : 383-391
作者:  Kohl, Lukas;  Meng, Meng;  de Vera, Joan;  Bergquist, Bridget;  Cooke, Colin A.;  Hustins, Sarah;  Jackson, Brian;  Chow, Chung-Wai;  Chan, Arthur W. H.
收藏  |  浏览/下载：27/0  |  提交时间：2019/04/09
wildfire  polycyclic aromatic hydrocarbons  PAH  trace elements  indoor pollution  arsenic  
Intramolecular isotopic evidence for bacterial oxidation of propane in subsurface natural gas reservoirs 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (14) : 6653-6658
作者:  Gilbert, Alexis;  Lollar, Barbara Sherwood;  Musat, Florin;  Giunta, Thomas;  Chen, Songcan;  Kajimoto, Yuki;  Yamada, Keita;  Boreham, Christopher J.;  Yoshida, Naohiro;  Ueno, Yuichiro
收藏  |  浏览/下载：22/0  |  提交时间：2019/11/27
intramolecular isotope  biodegradation  hydrocarbons  propane  
Large changes in biomass burning over the last millennium inferred from paleoatmospheric ethane in polar ice cores 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (49) : 12413-12418
作者:  Nicewonger, Melinda R.;  Aydin, Murat;  Prather, Michael J.;  Saltzman, Eric S.
收藏  |  浏览/下载：37/0  |  提交时间：2019/11/27
ethane  ice cores  biomass burning  geologic hydrocarbons  Little Ice Age  
Grassland fire ecology has roots in the late Miocene 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (48) : 12130-12135
作者:  Karp, Allison T.;  Behrensmeyer, Anna K.;  Freeman, Katherine H.
收藏  |  浏览/下载：17/0  |  提交时间：2019/11/27
C-4 grassland expansion  paleofire  polycyclic aromatic hydrocarbons  leaf wax carbon isotopes  Mio-Pliocene  
Comparative major components and health risks of toxic elements and polycyclic aromatic hydrocarbons of PM2.5 in winter and summer in Zhengzhou: Based on three-year data 期刊论文
ATMOSPHERIC RESEARCH, 2018, 213: 173-184
作者:  Jiang, Nan;  Duan, Shiguang;  Yu, Xue;  Zhang, Ruiqin;  Wang, Ke
收藏  |  浏览/下载：18/0  |  提交时间：2019/04/09
PM2.5  Chemical characteristics  Meteorological impact  Polycyclic aromatic hydrocarbons  Carcinogenic risks  
Source Apportionment and Secondary Transformation of Atmospheric Nonmethane Hydrocarbons in Chengdu, Southwest China 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (17) : 9741-9763
作者:  Song, Mengdi;  Tan, Qinwen;  Feng, Miao;  Qu, Yu;  Liu, Xingang;  An, Junling;  Zhang, Yuanhang
收藏  |  浏览/下载：22/0  |  提交时间：2019/04/09
nonmethane hydrocarbons  secondary transformation  source apportionment  positive matrix factorization  cluster analysis  potential source contribution function  
Emergent patterns and processes in urban hydrocarbon governance 期刊论文
ENERGY POLICY, 2017, 111
作者:  Fry, Matthew;  Brannstrom, Christian
收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09
Corporate social responsibility  Hydraulic fracturing  Local control  Policy mobilities  Setback distance  Unconventional hydrocarbons