Sulfur disproportionating microbial communities in a dynamic, microoxic-sulfidic karst system [0.03%]
动态微氧-硫化碳酸盐岩系统中的硫不均衡微生物群落
Heidi S Aronson,Christian E Clark,Douglas E LaRowe et al.
Heidi S Aronson et al.
Biogeochemical sulfur cycling in sulfidic karst systems is largely driven by abiotic and biological sulfide oxidation, but the fate of elemental sulfur (S0 ) that accumulates in these systems is not well understood. The Frasassi Cave system...
Microbial diversity and authigenic siderite mediation in sediments surrounding the Kedr-1 mud volcano, Lake Baikal [0.03%]
说贝加尔湖克德泥火山周围沉积物中的微生物多样性及原生赤铁矿作用
Anna V Lomakina,Sergei V Bukin,Tatyana V Pogodaeva et al.
Anna V Lomakina et al.
The gas hydrate-bearing structure-mud volcano Kedr-1 (Lake Baikal, southern basin)-is located near the coal-bearing sediments of the Tankhoy formation of Oligocene-Miocene age and can be an ideal source of gas-saturated fluid. A significant...
Evolution of iron and oxygen biogeochemical cycles during the Precambrian [0.03%]
前寒武纪铁和氧生物地球化学循环的演化
Yasuto Watanabe,Eiichi Tajika,Kazumi Ozaki
Yasuto Watanabe
Iron (Fe) is an essential element for life, and its geochemical cycle is intimately linked to the coupled history of life and Earth's environment. The accumulated geologic records indicate that ferruginous waters existed in the Precambrian ...
White and green rust chimneys accumulate RNA in a ferruginous chemical garden [0.03%]
白绿锈杆菌在铁质化学花园中积累RNA
Vanessa Helmbrecht,Maximilian Weingart,Frieder Klein et al.
Vanessa Helmbrecht et al.
Mechanisms of nucleic acid accumulation were likely critical to life's emergence in the ferruginous oceans of the early Earth. How exactly prebiotic geological settings accumulated nucleic acids from dilute aqueous solutions, is poorly unde...
Tocopherols and associated derivatives track the phytoplanktonic response to evolving pelagic redox conditions spanning Oceanic Anoxic Event 2 [0.03%]
生育酚及其相关衍生物追踪Oceanic Anoxic Event 2期间不断变化的水体氧化还原条件下浮游植物的响应
Gregory T Connock,Xiao-Lei Liu
Gregory T Connock
Tocopherols serve a critical role as antioxidants inhibiting lipid peroxidation in photosynthetic organisms, yet are seldom used in geobiological investigations. The ubiquity of tocopherols in all photosynthetic lifeforms is often cited as ...
Lipid biomarkers recording marine microbial community structure changes through the Frasnian-Famennian mass extinction event [0.03%]
脂质生物标志物记录了弗拉斯-法姆恩灭绝事件期间的海洋微生物群落结构变化
Jian Chen,Nicholas Hogancamp,Man Lu et al.
Jian Chen et al.
Studying the response and recovery of marine microbial communities during mass extinction events provides an evolutionary window through which to understand the adaptation and resilience of the marine ecosystem in the face of significant en...
Major contribution of sulfide-derived sulfur to the benthic food web in a large freshwater lake [0.03%]
硫化物衍生硫对大型淡水湖泊底栖食物网的重要贡献
Yuji Onishi,Toshiro Yamanaka,Keisuke Koba
Yuji Onishi
In freshwater systems, contributions of chemosynthetic products by sulfur-oxidizing bacteria in sediments as nutritional resources in benthic food webs remain unclear, even though chemosynthetic products might be an important nutritional re...
Fire activity across Cretaceous/Paleogene transition: Evidence from pyrogenic biomarkers preserved in the Mahadeo-Cherrapunji section, Meghalaya, India [0.03%]
印度梅加拉亚邦马哈代奥-恰鲁蓬境剖面保存的白垩纪/古近纪界线附近沉积物中燃烧标志物分子：来自生物标志化合物的证据
Sucharita Pal,Jaya Prakash Shrivastava,Munnuru Singamshetty Kalpana
Sucharita Pal
Previous studies on high concentrations of polycyclic aromatic hydrocarbon (PAHs) present in the shallow-marine Um-Sohryngkew River (USR) Cretaceous/Paleogene Boundary (KPB) section suggested regional fire incidences and biotic stress on li...
Organic-rich bimineralic ooids record biological processes in Shark Bay, Western Australia [0.03%]
西澳大利亚鲨鱼湾富含有机质的双矿物球粒记录了生物过程
Juliet Y F Ramey-Lariviere,Jian Gong,Matthew J Baldes et al.
Juliet Y F Ramey-Lariviere et al.
Marine ooids have formed in microbially colonized environments for billions of years, but the microbial contributions to mineral formation in ooids continue to be debated. Here we provide evidence of these contributions in ooids from Carbla...
Isotopic evidence of environmental changes during the Devonian-Carboniferous transition in South China and its implications for the biotic crisis [0.03%]
华南志留纪-泥盆纪转折期环境变化的同位素证据及其对生物灾变事件的启示
Hansheng Cao,Liumei Hu,Zaiyun Wang et al.
Hansheng Cao et al.
The Devonian-Carboniferous (D-C) transition coincides with the Hangenberg Crisis, carbon isotope anomalies, and the enhanced preservation of organic matter associated with marine redox fluctuations. The proposed driving factors for the biot...