Figure 3
From: N2 fixation dominates nitrogen cycling in a mangrove fiddler crab holobiont

Nitrate reduction processes in crab carapace biofilm slurries: (a) production of N2 via denitrification and (b) production of NH4+ via dissimilative nitrate reduction to ammonia (DNRA). Biofilm slurries were amended with 15NO3− and incubated over a period of 12 h, and represent potential rates. Note that production of N2 is not shown for the last time point as it exceeded the measuring rage of the instrument. Both potential rates are expresses as micromoles of N per g dry weight of suspended biofilm.