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...
Unlocking the Secrets of Saline Lakes: How Environmental and Microbial Interactions Shape Protodolomite Formation [0.03%]
咸水湖中 протодоломит形成的故事：环境与微生物的相互作用
Yang Li,Xuan Qiu,Deng Liu et al.
Yang Li et al.
Protodolomite formation in saline lakes remains enigmatic, despite favorable conditions for dolomite precipitation. To unravel this mystery, sediment samples were collected from two saline lakes in northeastern Inner Mongolia: Jibuhulangtu ...
A Flourishing Planktonic Microbial Community in an Interglacial Offshore Environment: Silicified Microfossils From the Cryogenian Datangpo Formation, South China [0.03%]
南中国(datangpo地层)哭吉诺安期间冰世离岸环境中的繁荣浮游微生物群落：硅化微化石记录
Qing Ouyang,Chuanming Zhou,Xianguo Lang et al.
Qing Ouyang et al.
The Cryogenian global glaciations profoundly shaped the evolution of Earth's ecosystem. An active Cryogenian biosphere accompanied by key evolutionary innovations has been indicated by geochemical and phylogenetic studies, although fossil r...
Bioturbation Shapes Marine Biogeochemical Cycling Following the End-Permian Mass Extinction in Northern Pangea [0.03%]
底扰动影响二叠纪末生物大灭绝后泛大陆北方的海洋生地化学循环
Brian Beaty,William J Foster,Valentin Zuchuat et al.
Brian Beaty et al.
During the end-Permian mass extinction, a global decline in seafloor sediment mixing and burrowing (bioturbation) provides critical evidence for the collapse of marine ecosystems, likely triggered by rapid ocean warming and deoxygenation. H...