W. D. Orsi

Genome evolution in bacteria isolated from million-year-old subseafloor sediments

This study examines genome evolution in Thalassospira bacteria from million-year-old subseafloor sediments, finding reduced recombination, increased pseudogenes, and genetic drift as dominant evolutionary forces.

Anaerobic metabolism of Foraminifera thriving below the seafloor

This study investigates the metabolic adaptations of Foraminifera in anoxic marine sediments using metatranscriptomics, revealing fermentation, nitrate reduction, and phagocytic mechanisms that enable their survival and proliferation.

Textile waste and microplastic induce activity and development of unique hydrocarbon-degrading marine bacterial communities

The paper investigates how marine microbial communities respond metabolically to textile waste and microplastics, showing increased activity of hydrocarbon-degrading bacteria.

Chloroflexi persisting for millions of years in oxic and anoxic deep-sea clay

This study examines Chloroflexi in deep-sea sediments, showing their activity and metabolism differ between oxic and anoxic conditions over millions of years.

Contesting the evidence for gene expression in lower oceanic crust

The paper reanalyzes gene expression data from deep ocean crust and shows contamination from various sources, concluding the samples represent a fossilized biosphere, not active life.

Lokiarchaeon exhibits homoacetogenesis

This paper shows Lokiarchaeon exhibits homoacetogenesis by coupling fermentative H2 production with the Wood-Ljungdahl pathway under anoxic conditions.

A 16S rRNA gene sequencing and analysis protocol for the Illumina MiniSeq platform

The paper develops a 16S rRNA gene sequencing protocol for the Illumina MiniSeq platform, showing it produces high-quality V4 reads comparable to MiSeq at lower cost.