Enigmatic evolution of microbial nitrogen fixation: insights from Earth's past

HR Rucker, B Kaçar - Trends in Microbiology, 2023 - cell.com
The evolution of nitrogen fixation undoubtedly altered nearly all corners of the biosphere,
given the essential role of nitrogen in the synthesis of biomass. To date, there is no unified …

Bioavailability of molybdenite to support nitrogen fixation on early Earth by an anoxygenic phototroph

X Zhou, Y Sheng, Y Zheng, M Jiang, M Wang… - Earth and Planetary …, 2024 - Elsevier
Biological nitrogen fixation, which converts atmospheric dinitrogen to ammonia, is catalyzed
mostly by Mo-nitrogenase and is a primary contributor to bioavailable nitrogen on early …

Significant correlations between heavy metals and prokaryotes in the Okinawa Trough hydrothermal sediments

X Chen, Y Wang, Q Hou, X Liao, X Zheng… - Journal of Hazardous …, 2024 - Elsevier
Prokaryotes play crucial roles in hydrothermal vent ecosystems, yet their interactions with
heavy metals are not well understood. This study explored the diversity of prokaryotic …

Heavy metal tolerance, and metal biosorption by exopolysaccharides produced by bacterial strains isolated from marine hydrothermal vents

JM Ahamed, HU Dahms, YL Huang - Chemosphere, 2024 - Elsevier
The present study highlights heavy metal tolerance, EPS production, and biosorption
capacity of four hydrothermal vent bacterial strains, namely Exiguobacterium aquaticum …

Distribution and cycling of nickel and nickel isotopes in the pacific ocean

X Bian, SC Yang, RJ Raad… - Geophysical …, 2024 - Wiley Online Library
Nickel stable isotopes (δ60Ni) provide insight to Ni biogeochemistry in the modern and past
oceans. Here, we present the first Pacific Ocean high‐resolution dissolved Ni concentration …

Molybdenum in basalt-hosted seafloor hydrothermal systems: Experimental, theoretical, and field sampling approaches

GN Evans, LA Coogan, B Kaçar, WE Seyfried - … et Cosmochimica Acta, 2023 - Elsevier
Seafloor hydrothermal vents represent potential sources of Mo and other biologically
relevant transition metals to the global ocean, complementing continental runoff. Here, we …

Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms

GN Evans, S Ji, B Kaçar, AD Anbar… - … et Cosmochimica Acta, 2024 - Elsevier
Despite the importance of alkaline seafloor hydrothermal vents in broadening our
understanding of deep-sea hydrothermal ecosystems, little is known about the mobility and …

[HTML][HTML] Fractionation of iron and chromium isotopes in hydrothermal plumes from the northern Mid-Atlantic Ridge

W Wang, AJM Lough, H Goring-Harford… - Earth and Planetary …, 2023 - Elsevier
Hydrothermal venting impacts the global-scale biogeochemical cycles of many trace metals
and their isotopes. Processes in hydrothermal plumes regulate the dispersal of vent-derived …

Seafloor spreading and the delivery of sulfur and metals to Earth's oceans

DD Syverson, AN Awolayo, BM Tutolo - Geology, 2023 - pubs.geoscienceworld.org
Circulating fluids within Earth's mid-ocean ridge system cool and alter the oceanic crust,
contribute distinct chemistry to the ocean, and generate economically and geologically …

[PDF][PDF] A Chemical Characterization of the Endeavour Non-buoyant Plume, Juan de Fuca Ridge

M Zee - 2024 - dspace.library.uvic.ca
This study aims to provide a quantitative chemical characterization of the Endeavour non-
buoyant plume and examine the processes that impact trace metal transport from vent sites …