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DOE投资4亿美元推进多项科学前沿研究 快报文章
地球科学快报，2022年第20期
作者:  刘文浩
Microsoft Word(23Kb)  |  收藏  |  浏览/下载：630/0  |  提交时间：2022/10/24
DOE  Advance Scientific Frontiers  
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.


  
Securing Urban Frontiers: A View from Yangon, Myanmar 期刊论文
INTERNATIONAL JOURNAL OF URBAN AND REGIONAL RESEARCH, 2019
作者:  Sarma, Jasnea;  Sidaway, James D.
收藏  |  浏览/下载：11/0  |  提交时间：2020/02/17
Myanmar  Yangon  power  security  frontiers  Rangoon  
Producing Localized Commodity Frontiers at the End of Cheap Nature: An Analysis of Eco-scalar Carbon Fixes and their Consequences 期刊论文
INTERNATIONAL JOURNAL OF URBAN AND REGIONAL RESEARCH, 2018, 42 (5) : 828-844
作者:  Schindler, Seth;  Kanai, J. Miguel
收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09
commodity frontiers  political ecology  uneven development  world ecology  environmental governance  Cheap Nature  Amazonia  Brazil  Delhi  India  
Cost-effective Land Use Planning: Optimizing Land Use and Land Management Patterns to Maximize Social Benefits 期刊论文
ECOLOGICAL ECONOMICS, 2017, 139
作者:  Pennington, Derric N.;  Dalzell, Brent;  Nelson, Erik;  Mulla, David;  Taff, Steve;  Hawthorne, Peter;  Polasky, Stephen
收藏  |  浏览/下载：21/0  |  提交时间：2019/04/09
Water quality  Land use and land management policy  Ecosystem services  Agriculture  Land use change  Efficiency frontiers  
Economic Opportunities and Trade-Offs in Collaborative Forest Landscape Restoration 期刊论文
ECOLOGICAL ECONOMICS, 2017, 136
作者:  Ager, Alan A.;  Vogler, Kevin C.;  Day, Michelle A.;  Bailey, John D.
收藏  |  浏览/下载：29/0  |  提交时间：2019/04/09
Forest Restoration  Spatial Optimization  Restoration Prioritization  Production Possibility Frontiers  Collaborative Planning  
Carbon emissions from agricultural expansion and intensification in the Chaco 期刊论文
GLOBAL CHANGE BIOLOGY, 2017, 23 (5)
作者:  Baumann, Matthias;  Gasparri, Ignacio;  Piquer-Rodrguez, Mara;  Gavier Pizarro, Gregorio;  Griffiths, Patrick;  Hostert, Patrick;  Kuemmerle, Tobias
收藏  |  浏览/下载：10/0  |  提交时间：2019/04/09
carbon bookkeeping model  deforestation frontiers  Landsat image archive  land-use change  post-deforestation dynamics  savannas  tropical dry forests