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From its origins, perhaps some 4 billion years ago, life has had a profound influence on shaping the evolving Earth. Biological innovations have led to lasting environmental change, while geology feeds back on biology, creating new opportunities for evolutionary innovation. For over 80% of Earth’s living history, biological processes were driven exclusively by microorganisms. Because microorganisms are ubiquitous in environments where the temperature is below <100oC, the field of Geomicrobiology thus studies the relationships between the microbial life forms and their environment, from localized niches, that occur on the order of micrometers, to global elemental cycles. On each of these scales, there exists a complex interplay of biogeochemical processes that are based on the nutritional and energy requirements of co-dependent species living in juxtaposition to one another. These include, the sorption and uptake of metals, the formation of authigenic mineral phases (termed biomineralization), the weathering and dissolution of minerals and rock surfaces, and chemical and mineralogical transformations that take place during the burial and lithification of sediments. My research programme integrates geochemical, microbiological and genetic experimental studies with field-based research in modern surface environments to investigate the mechanisms by which microbes interact with their environment, and whether unique biological features may be recognisable. These studies are then linked to the analyses of the rock record, spanning nearly 4 billion years, as a means to test the usefulness of those modern biosignatures, with the ultimate aim being to gain a better understanding for the evolution of early Earth’s geosphere, hydrosphere, biosphere and atmosphere. Seven of my current research interests are briefly outlined below. They include (1) microbial surface reactivity, (2) microbial silicification, (3) modern microbialites, (4) sediment diagenesis and the effects of infaunal burrowing, (5) understanding the mechanisms for Precambrian banded iron formation, and (6) using Precambrian sediments as palaeo-seawater proxies.
Research Interests
Papers共 470 篇Author StatisticsCo-AuthorSimilar Experts
By YearBy Citation主题筛选期刊级别筛选合作者筛选合作机构筛选
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期刊级别
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合作机构
Journal of Geophysical Research Solid Earthno. 3 (2024)
GEOENERGY SCIENCE AND ENGINEERING (2024)
ICHNOS-AN INTERNATIONAL JOURNAL FOR PLANT AND ANIMAL TRACESno. 2-3 (2024): 110-123
crossref(2024)
mSystemsno. 11 (2024): e0031724-e0031724
ENVIRONMENTAL SCIENCE & TECHNOLOGYno. 13 (2024): 6062-6062
EARTH AND PLANETARY SCIENCE LETTERS (2024)
PRECAMBRIAN RESEARCH (2024)
GEOBIOLOGYno. 4 (2024)
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Author Statistics
#Papers: 470
#Citation: 16730
H-Index: 66
G-Index: 119
Sociability: 7
Diversity: 3
Activity: 124
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