The northern East China Sea is currently subjected to anthropogenic disturbances during the past few decades. Using data collected in July 2019 and July 2020, the AZTI's Marine Biotic Index (AMBI), multivariate-AMBI (M-AMBI), Shannon–Wiener diversity index (H′), and BENTIX index were adopted to assess their applicability and evaluate the benthic ecological quality of the northern East China Sea. The results of the Pearson correlation between biotic indices and eutrophication environmental factors showed that H′ and M-AMBI were suitable biotic indices for evaluating the benthic ecological quality in the northern East China Sea rather than AMBI and BENTIX. The overall benthic ecological quality in the northern East China Sea was moderate to good during 2019–2020. Ecological quality showed a positive correlation with distance to mainland. However, a slow declining trend was detected for the benthic ecological quality of the northern East China Sea, especially the nearshore areas.

东海北部在过去几十年里一直受到人为干扰。利用2019年7月和2020年7月收集的数据，采用AZTI的海洋生物指数（AMBI）、多元AMBI（M-AMBI）、香农-维纳多样性指数（H′）和BENTIX指数来评估其适用性并评估其适用性。东海北部底栖生态质量. 生物指数与富营养化环境因子的Pearson相关性结果表明，H′和M-AMBI比AMBI和BENTIX更适合评价东海北部底栖生态质量。2019-2020年东海北部海底生态质量总体为中等到良好。生态质量与距大陆距离呈正相关。然而，