D. A. Stahl

Genomic and environmental controls on Castellaniella biogeography in an anthropogenically disturbed subsurface

This study investigates how genomic and environmental factors influence the distribution of Castellaniella species in a contaminated subsurface, identifying genetic mechanisms underlying their adaptation to stress.

Differential substrate affinity and catabolite repression enable preferential use of urea by ammonia-oxidizing bacteria

The paper shows that ammonia-oxidizing microorganisms use different regulatory strategies for ammonia and urea, enabling coexistence by minimizing competition.

Origin of biogeographically distinct ecotypes during laboratory evolution

This study shows how mutations in microbial species lead to resource partitioning and improved community productivity in a simulated subsurface environment.

A novel order-level lineage of ammonia-oxidizing Thaumarchaeota is widespread in marine and terrestrial environments

The paper identifies a new AOA order, Nitrosomirales, widespread in marine and terrestrial environments, showing metabolic versatility and horizontal gene transfer.

Sustained nitrogen loss in a symbiotic association of Comammox Nitrospira and Anammox bacteria

The paper examines the ecological relevance of Comammox Nitrospira and Anammox bacteria coexistence by establishing synthetic communities that enable sustained nitrogen loss through dinitrogen gas production.

Synergistic epistasis enhances cooperativity of mutualistic interspecies interactions

The paper investigates how synergistic epistasis enhances cooperativity in mutualistic interspecies interactions between Desulfovibrio vulgaris and Methanococcus maripaludis under varying sulfate conditions.

Resource limitation modulates the fate of dissimilated nitrogen in a dual-pathway Actinobacterium

The paper shows that resource limitation in Intrasporangium calvum C5 favors ammonification over denitrification, driven by redox poise rather than C:NO3- ratio.