TY - RPRT TI - Exploring the influence of atmospheric CO2 and O2 levels on the utility of nitrogen isotopes as proxy for biological N2 fixation AU - Wannicke, N. AU - Stüeken, E. E. AU - Bauersachs, T. AU - Gehringer, M. M. PY - 2024 DO - 10.1101/2024.03.28.587259 UR - https://www.biorxiv.org/content/10.1101/2024.03.28.587259v1 ID - 10.1101/2024.03.28.587259 ER -