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...
Environmental and temporal patterns in bioturbation in the Cambrian-Ordovician of Western Newfoundland [0.03%]
纽芬兰西部寒武纪-奥陶纪时期遗迹生物学的环境和时代差异性研究
Lidya G Tarhan,Rhiannon Z Nolan,Sophie Westacott et al.
Lidya G Tarhan et al.
The early Paleozoic emergence of bioturbating (sediment-dwelling and -mixing) animals has long been assumed to have led to substantial changes in marine biogeochemistry, seafloor ecology, and the preservation potential of both sedimentary a...
Widespread seafloor anoxia during generation of the Ediacaran Shuram carbon isotope excursion [0.03%]
埃迪卡拉纪森拉姆碳同位素偏移形成的海洋缺氧环境广泛分布
Chadlin M Ostrander,Christian J Bjerrum,Anne-Sofie C Ahm et al.
Chadlin M Ostrander et al.
Reconstructing the oxygenation history of Earth's oceans during the Ediacaran period (635 to 539 million years ago) has been challenging, and this has led to a polarizing debate about the environmental conditions that played host to the ris...
Microbial influence on dolomite and authigenic clay mineralisation in dolocrete profiles of NW Australia [0.03%]
微生物对澳大利亚西北部 dolocrete 剖面中 dolomite 和自生粘土矿物化的影响
Caroline C Mather,Heta M Lampinen,Maurice Tucker et al.
Caroline C Mather et al.
Dolomite (CaMg(CO3 )2 ) precipitation is kinetically inhibited at surface temperatures and pressures. Experimental studies have demonstrated that microbial extracellular polymeric substances (EPS) as well as certain clay minerals may cataly...
Biogeochemical transformations after the emergence of oxygenic photosynthesis and conditions for the first rise of atmospheric oxygen [0.03%]
氧气光合作形成之后的生物地球化学转化以及大气氧第一次上升时期的条件
Yasuto Watanabe,Eiichi Tajika,Kazumi Ozaki
Yasuto Watanabe
The advent of oxygenic photosynthesis represents the most prominent biological innovation in the evolutionary history of the Earth. The exact timing of the evolution of oxygenic photoautotrophic bacteria remains elusive, yet these bacteria ...
Bioavailability of mineral-associated trace metals as cofactors for nitrogen fixation by Azotobacter vinelandii [0.03%]
矿质关联微量元素作为氮固定辅因子的生物有效性：来源于Azotobacter vinelandii的证据
Shreya Srivastava,Hailiang Dong,Oliver Baars et al.
Shreya Srivastava et al.
Life on Earth depends on N2 -fixing microbes to make ammonia from atmospheric N2 gas by the nitrogenase enzyme. Most nitrogenases use Mo as a cofactor; however, V and Fe are also possible. N2 fixation was once believed to have evolved durin...
Gabriela A Farfan,David A McKeown,Jeffrey E Post
Gabriela A Farfan
Non-crystalline silica mineraloids are essential to life on Earth as they provide architectural structure to dominant primary producers, such as plants and phytoplankton, as well as to protists and sponges. Due to the difficulty in characte...
Brandt M Gibson,James D Schiffbauer,Adam F Wallace et al.
Brandt M Gibson et al.
The Ediacara biota are an enigmatic group of Neoproterozoic soft-bodied fossils that mark the first major radiation of complex eukaryotic and macroscopic life. These fossils are thought to have been preserved via pyritic "death masks" media...
Ediacaran-Cambrian bioturbation did not extensively oxygenate sediments in shallow marine ecosystems [0.03%]
埃迪卡拉纪-寒武纪底栖生物搅动作用并未在浅海沉积物中广泛增氧
Alison T Cribb,Sebastiaan J van de Velde,William M Berelson et al.
Alison T Cribb et al.
The radiation of bioturbation during the Ediacaran-Cambrian transition has long been hypothesized to have oxygenated sediments, triggering an expansion of the habitable benthic zone and promoting increased infaunal tiering in early Paleozoi...