★ Geobiology and Reconstruction of Ecosystems in Critical Geological Periods: Researches focus on the investigation of molecular fossils and vital elements such as oxygen, carbon, nitrogen, sulfur. Special interests include molecular fossils from microbial ecosystem, involving elemental geologic cycles between organic and inorganic materials and important for understanding the interactions of organisms with geological process, including land erosion, sea-level change, anoxia or euxinia, and extreme environments, and ecosystem concept in studies of important biota
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