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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：59/0  |  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.


  
Changes of soil microbial and enzyme activities are linked to soil C, N and P stoichiometry in afforested ecosystems 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 427: 289-295
作者:  Zhao, F. Z.;  Ren, C. J.;  Han, X. H.;  Yang, G. H.;  Wang, J.;  Doughty, R.
收藏  |  浏览/下载：29/0  |  提交时间：2019/04/09
Soil microbial  Extracellular enzyme activities  Soil C, N and P stoichiometry  P-limited  Afforested ecosystem  
Drought consistently alters the composition of soil fungal and bacterial communities in grasslands from two continents 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (7) : 2818-2827
作者:  Ochoa-Hueso, Raul;  Collins, Scott L.;  Delgado-Baquerizo, Manuel;  Hamonts, Kelly;  Pockman, William T.;  Sinsabaugh, Robert L.;  Smith, Melinda D.;  Knapp, Alan K.;  Power, Sally A.
收藏  |  浏览/下载：29/0  |  提交时间：2019/04/09
drought  enzyme activities  microbial community  rainfall manipulation  soil-borne pathogens  
Quantitative losses vs. qualitative stability of ectomycorrhizal community responses to 3 years of experimental summer drought in a beech-spruce forest 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (2) : E560-E576
作者:  Nickel, Uwe T.;  Weikl, Fabian;  Kerner, Rene;  Schaefer, Cynthia;  Kallenbach, Christian;  Munch, Jean C.;  Pritsch, Karin
收藏  |  浏览/下载：11/0  |  提交时间：2019/04/09
climate change  ectomycorrhizae  enzyme activities  Fagus sylvatica  forest ecosystems  fungal diversity  Picea abies  summer drought  
Warmer night-time temperature promotes microbial heterotrophic activity and modifies stream sediment community 期刊论文
GLOBAL CHANGE BIOLOGY, 2017, 23 (9)
作者:  Freixa, Anna;  Acuna, Vicenc;  Casellas, Maria;  Pecheva, Stoyana;  Romani, Anna M.
收藏  |  浏览/下载：16/0  |  提交时间：2019/04/09
artificial streams  diel cycles  dissolved organic carbon  extracellular enzyme activities  global warming  meiofauna