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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：37/0  |  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.


  
Fire severity effects on soil carbon and nutrients and microbial processes in a Siberian larch forest 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (12) : 5841-5852
作者:  Ludwig, Sarah M.;  Alexander, Heather D.;  Kielland, Knut;  Mann, Paul J.;  Natali, Susan M.;  Ruess, Roger W.
收藏  |  浏览/下载：6/0  |  提交时间：2019/04/09
arctic  boreal forest  carbon cycling  climate change  extracellular enzyme activity  fire  permafrost  
Microbial mechanisms of carbon priming effects revealed during the interaction of crop residue and nutrient inputs in contrasting soils 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (7) : 2775-2790
作者:  Fang, Yunying;  Nazaries, Loic;  Singh, Brajesh K.;  Singh, Bhupinder Pal
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
C-13 isotope  copiotrophs  enzymatic stoichiometry  extracellular enzyme activity  gene abundance  oligotrophs  
Long-term effects of climate change on carbon storage and tree species composition in a dry deciduous forest 期刊论文
GLOBAL CHANGE BIOLOGY, 2017, 23 (8)
作者:  Fekete, Istvan;  Lajtha, Kate;  Kotroczo, Zsolt;  Varbiro, Gabor;  Varga, Csaba;  Toth, Janos Attila;  Demeter, Ibolya;  Veperdi, Gabor;  Berki, Imre
收藏  |  浏览/下载：9/0  |  提交时间：2019/04/09
coarse woody debris  dry conditions in forest  forest stand composition and diversity change  net primary production  oak decline  Sikfokut Forest  soil carbon storage  
Enhanced summer warming reduces fungal decomposer diversity and litter mass loss more strongly in dry than in wet tundra 期刊论文
GLOBAL CHANGE BIOLOGY, 2017, 23 (1)
作者:  Christiansen, Casper T.;  Haugwitz, Merian S.;  Prieme, Anders;  Nielsen, Cecilie S.;  Elberling, Bo;  Michelsen, Anders;  Grogan, Paul;  Blok, Daan
收藏  |  浏览/下载：9/0  |  提交时间：2019/04/09
Arctic  Ascomycota  Basidiomycota  Betula glandulosa  climate warming  deepened snow  fungi  litter decomposition  litter moisture