Paleoenvironmental Stasis for the Bioturbating Community During the Paleocene-Eocene Thermal Maximum at the Southern Iberian Margin [0.03%]
晚白垩世-古新世热极期伊比利亚南部边缘混居群落的古环境平衡状态研究
Olmo Miguez-Salas,Francisco J Rodríguez-Tovar,Victoriano Pujalte
Olmo Miguez-Salas
During the Paleocene-Eocene Thermal Maximum (PETM), there was an increase in global temperatures and emissions of isotopically depleted carbon, resulting in a negative carbon isotope excursion (CIE). This climatic event caused a widespread ...
Membrane Vesicle Formation Removes Iron Sulfide Mineral Crusts From the Cell Surface of Growing Sulfate-Reducing Bacteria [0.03%]
膜囊泡的形成可去除生长中的硫酸盐还原菌细胞表面的铁硫化物矿物包被
Cheyenne Brokaw,Patrice Boyd,Aude Picard
Cheyenne Brokaw
Sulfate-reducing bacteria (SRB) drive the process of sulfate reduction in low-temperature sedimentary environments. Through the production of sulfide, they promote the formation of iron-sulfide (Fe-S) minerals when Fe(II) is available. The ...
Tricks of Nature From the Ancient Earth and Early Mars: Chemical Gardens Generate Biomorphs With High Preservation Potential [0.03%]
古地球与早火星的自然奇观——化学花园产生可高度保存的生命体类似物
Solomon Hirsch,Sean McMahon,Jens Najorka et al.
Solomon Hirsch et al.
Observations of morphology are commonly used to evaluate the biogenicity of terrestrial microfossils and could constitute a crucial line of evidence for extraterrestrial life-detection missions in the future. However, evaluating the origin ...
Phytochemical Screening of 45-Million-Year-Old Colored Angiosperm Leaves Reveals Distinctive Chlorophyll-Derived and Polyphenolic Pigments [0.03%]
4500万年前被子植物叶片的植化筛查揭示类叶绿素和多酚色素痕迹
Klaus Wolkenstein,Christa E Müller,Marianne Engeser et al.
Klaus Wolkenstein et al.
Present-day angiosperm plants produce a plethora of metabolites including pigments that serve for important functions such as photosynthesis, protection against light, attraction of pollinators, and defense against microbes and herbivores. ...
Localized and Transient Oxygenation of Shallow Oceans of Southwestern Laurentia at the Ediacaran-Cambrian Boundary [0.03%]
埃迪卡拉纪-寒武纪之交劳伦大陆西南部浅水海洋的局域和短暂氧化事件
Watsawan Chanchai,Lyle L Nelson,Emily F Smith et al.
Watsawan Chanchai et al.
The Ediacaran-Cambrian boundary, which precedes one of the most significant biotic diversification events in Earth's history, is associated with a global negative carbon isotope excursion termed the BAsal Cambrian carbon isotope Excursion (...
Redox Dynamics of the Atmosphere and Oceans Induced by the Paleoproterozoic Snowball Earth Events [0.03%]
古元古代雪球事件引起的大气和海洋的氧化还原动态变化
Mariko Harada,Yuna Miura,Yasuto Watanabe et al.
Mariko Harada et al.
The Paleoproterozoic Earth underwent profound environmental changes, including multiple severe glaciations and fluctuations in atmospheric oxygen (O2) levels. However, the precise relationship between O2 evolution and the glaciations remain...
A Comprehensive Study of Biohopanoid Production in Alphaproteobacteria: Biosynthetic, Chemotaxonomical, and Geobiological Implications [0.03%]
阿尔法变形菌生物 hopanoids 生产的综合研究：生物合成、化学分类学和古生物学意义
Jaap S Sinninghe Damsté,Michel Koenen,Vera Thiel et al.
Jaap S Sinninghe Damsté et al.
Bacteriohopanepolyol derivatives (BHPDs) and dia- and catagenetic products formed from these bacterial membrane modifiers are extensively used as biomarkers in molecular ecological and geoscience studies. Some BHPDs can be assigned to speci...
Understanding Ferruginous Versus Euxinic Conditions by Simulating Microbial Conditions in Meromictic Lakes [0.03%]
通过模拟分层湖泊中的微生物条件来理解铁质和硫化条件的区别
Vanessa M Hawkins,Cody S Sheik,Sergei Katsev
Vanessa M Hawkins
Ferruginous (iron-rich) conditions have been prominent in oceans throughout the Earth's geologic history but now are reliably found only in a handful of permanently stratified lakes. Microbially mediated iron reduction in such anoxic enviro...
Biogeochemistry of an Iron- and Manganese-Rich Stratified Lake: Tasik Biru, Malaysia, as a Modern Model Habitat for the Ancient Ocean [0.03%]
马来西亚蓝色湖的生物地球化学特性——作为古代海洋现代栖息地的研究模型
Muammar Mansor,Andreas Kappler,Tomás Israel Grijalva Rodríguez et al.
Muammar Mansor et al.
Tasik Biru is a ~70 m-deep tropical lake in Malaysia, originating from a water-filled open pit mine. We investigated the biogeochemistry and microbial community of the lake as a modern model habitat to the stratified ancient ocean. We found...