[ACG48-P16] Interannual variability of bottom oxygen concentration and primary production in the southern Chukchi Sea biological hotspot
Keywords:biological hotspot, primary production, bottom oxygen concentration
The bottom DO showed large interannual variability (104–300 µM) and it was negatively and significantly correlated with cumulative primary production (r = -0.66, p < 0.05). Such negative correlation suggests organic carbon flux to the sea floor drives the activity of the benthic community. Environmental process of decreasing in DO was assessed using one box ecosystem model optimized for the SCH bottom layer. The model also captured bottom DO is sensitive to the flux of primary production from the upper layer. Our results suggest inter-annual variability of primary production is a key factor determining the recent changes in biomass and distribution of the benthic organisms.