Mineralization Controls Informative Biomarker Preservation Associated With Soft Part Fossilization in Deep Time [0.03%]
深层时间下软体化石生物标志物保存的相关矿物化控制因素具有信息价值
Madison Tripp,Jasmina Wiemann,Luke Brosnan et al.
Madison Tripp et al.
Diagenetically mineralized fossil tissues represent invaluable paleobiological evidence of past life. Lipid biomarkers may be identified alongside fossils, yet the relationship between localized, diagenetic mineral precipitation, and lipid ...
Oxygenation and Alkalinity Drive the Lacustrine Nitrogen Isotope Record Throughout the Past 3.2 Billion Years [0.03%]
32亿年至今湖泊氮同位素记录受控于氧化和碱度变化
Diana Velazquez,Nathan D Sheldon,Michael T Hren et al.
Diana Velazquez et al.
The widespread, stepwise oxygenation of Earth's atmosphere in the Precambrian led to a transformation of the global carbon (C) and nitrogen (N) cycles. While the temporal evolution of these nutrient cycles has been studied extensively in ma...
The Tubotomaculum Enigma and the Rise of Benthic Life During the Opening of the Western Mediterranean Basin [0.03%]
吐布托马库鲁姆谜题和西地中海盆地开启期间底栖生物的崛起
Simone Bernardini,Anas Abbassi,Paola Cipollari et al.
Simone Bernardini et al.
Large-scale geological processes shape microbial habitats and drive the evolution of life on Earth. During the Oligocene, convergence between Africa and Europe led to the opening of the Western Mediterranean Basin, a deep-ocean system chara...
A Reassessment of the Coprostane Biomarker in the Ediacaran With Implications for Dickinsonia [0.03%]
狄克森尼亚动物说的重新评估及其对艾迪卡拉纪粪甾烷生物标志物的影响
Christopher Mulligan,David A Gold
Christopher Mulligan
The discovery of cholestane in animal fossils from the Ediacaran (571-541 million years ago) has generated much excitement, but it is not the only interesting biomarker recovered. Coprostane, a geologically stable form of coprostanol, has a...
Thallium Isotopes Suggest the Global Deep Ocean Did Not Approach Modern Oxygenation During Cambrian Age 3 Metazoan Radiation [0.03%]
铊同位素显示寒武纪第三期多细胞生物辐射期间全球深海未达到现代氧浓度水平
Jean N R Clemente,Haifeng Fan,Chadlin M Ostrander et al.
Jean N R Clemente et al.
The geologically rapid appearance of most extant animal groups in the Cambrian fossil record is often linked to enhanced ocean oxygenation. However, conflicting reconstructions of the Cambrian redox landscape make it difficult to determine ...
Impacts on Sedimentary Microbial Communities Related to Temporal Changes in Trace Metal Concentrations [0.03%]
与微量元素浓度时空变化相关的沉积物微生物群落的影响
Christopher K Jones,Jessica M Labonté,Lauren A Haygood et al.
Christopher K Jones et al.
Microbial processes in marine sediments drive changes in redox conditions, ultimately controlling the cycling of elements between the dissolved and solid phases. The microbial community driving these cycles depends on trace metals, but it c...
Two Worlds on a Stone: Arctic Desert Hypoliths and Epiliths Show Spatial Niche Differentiation [0.03%]
藏在石头里的两个世界：北极沙漠的石下生物和石上生物展现空间生态位分化
Andrew Baker,Dale Stokes,Anushree Srivastava et al.
Andrew Baker et al.
In Arctic polar deserts, rocks can be extensively colonized by phototrophic hypolithic communities that exploit periglacial sorting processes to grow beneath opaque rocks. These communities are distinguished by green bands that are distinct...
Sulfide Oxidation Products Support Microbial Metabolism at Interface Environments in a Marine-Like Serpentinizing Spring in Northern California [0.03%]
四川北部类似海洋的蛇纹化温泉中的硫化物氧化产物在界面环境中支持微生物代谢
Leah Trutschel,Brittany Kruger,Andrew Czaja et al.
Leah Trutschel et al.
Interface environments between extreme and neutrophilic conditions are often hotspots of metabolic activity and taxonomic diversity. In serpentinizing systems, the mixing of high pH fluids with meteoric water, and/or the exposure of these f...
Arsenic Accumulation in Microbial Biomass and the Interpretation of Signals of Early Arsenic-Based Metabolisms [0.03%]
微生物生物量中的砷积累及基于砷的早期代谢信号的解析
David Madrigal-Trejo,Matthew J Baldes,Nobumichi Tamura et al.
David Madrigal-Trejo et al.
Carbonaceous particles that concentrate arsenic in microbialites as old as ~3.5 Ga are similar to As-rich organic globules in modern microbialites. The former particles have been interpreted as tracers of As cycling by early microbial metab...
Individual Microfossil δ13C Shows That δ13Corg Excursions in the Neoproterozoic Chuar Group Do Not Reflect the Exogenic Carbon Cycle [0.03%]
个体微化石δ13C表明新元古代Chuar群δ13CORG偏移并非外源碳循环的反映
Heda Agić,Susannah M Porter,Phoebe A Cohen et al.
Heda Agić et al.
Changes in δ13C value of bulk sedimentary organic matter (OM) throughout Earth's history are thought to reflect carbon cycle perturbations, but as sedimentary OM may derive from multiple sources, it could also record other processes. We me...