Ancient carbon flux into ecosystem biomass in shallow-water hydrothermal systems

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Hydrothermal vents introduce substantial amounts of ¹⁴C-free carbon into the ocean, primarily as CO₂. While these emissions influence global oceanic pool, mechanisms by which this is integrated marine ecosystems remain largely unexplored. Here, we present a combination bulk ¹⁴C and ¹³C measurements particulate organic (POC) from water column filters with compound-specific ²H, ¹³C, analyses fatty acids surface sediments to investigate cycling across benthic pelagic realms in low pH, shallow-water hydrothermal system off Taiwan. Using isotope correlations, study demonstrates that vent-derived CO₂ incorporated local microbial faunal ecosystem through chemoautotrophy supports photoautotrophy overlying column, particularly at margins vent plumes. Our findings reveal uptake levels fluids are substantially higher than previously documented. However, within 20-meter radius only up 3.4% daily sequestered, confirming systems net contributors inorganic pool. novel isotope-based approach provides in-situ evidence photoautotrophs incorporating carbon, highlighting yet unrecognized pathway ancient integration sequestration regions.

Language: Английский

Ultramafic-influenced submarine venting on basaltic seafloor at the Polaris site, 87°N, Gakkel Ridge

Earth and Planetary Science Letters, Journal Year: 2024, Volume and Issue: 651, P. 119166 - 119166

Published: Dec. 16, 2024

Language: Английский