marginally significantP = 0.08
The final model of PLSPM analysis showed that bottom-water oxygen had a strong positive effect on bioturbation ( P < 0.001), metazoan diversity ( P < 0.001), faunal respiration ( P < 0.001), and microbial aerobic respiration ( P < 0.001) and a negative direct effect on organic matter accumulation (C org , chlorophyll a, and THAA; marginally significant P = 0.08) and microbial anaerobic respiration ( P < 0.01).