中文摘要：

根据2010年8月至2014年8月对浙江渔山列岛附近海域6个站位的大型底栖动物调查，分析了渔山列岛附近海域大型底栖动物的群落结构特征，包括群落物种组成、优势种、丰度、生物量、群落的时空变化等，分析了大型底栖动物的群落结构，并使用AMBI和M—AMBI对大型底栖动物群落和环境质量进行了评估。结果表明：本次调查共鉴定出大型底栖动物60种，其中多毛类动物25种，软体动物13种，甲壳动物9种，棘皮动物4种，鱼类6种，其它动物3种（包括纽虫2种和扁形动物1种）。多毛类动物是该研究海域大型底栖动物群落的主要成分，占据了群落总种数的41．67％。在5个调查年份中，共出现了17种优势种，优势种年际变化很大，在5年内多次出现的优势种只有5种。在物种丰度方面，多毛类仍然是群落丰度的主要贡献者，但丰度的年际变化明显，从7．07％到40．89％不等。鱼类在生物量方面的重要性最高，主要是红狼牙锻虎鱼Odontamblyopus rubicundus的多次出现所致。在环境因子中，悬浮物和盐度被证明是该海域对大型底栖动物群落影响最大的环境因子，这与该海域较高的悬浮物含量以及多变的盐度密切相关；在AMBI和M—AMBI进行的生态质量评价显示，该海域多数站位的生态质量状况较好，处于轻度扰动的影响之下，这些扰动来源于环境和底质状况不稳定引发的自然扰动而非人为污染。

英文摘要：

This research was conducted annually in the adjacent area of the Yushan Islands, the East China Sea, and the benthic macrofauna composition and structure were analyzed. The community structure and distribution pattern of macrobenthos in the Yushan Islands were analyzed and evaluated, based on the data collected from the 6 sampling stations during August 2010 to August 2014. The community composition and structure were analyzed using CLUSTER, and ecological quality was also evaluated by benthic macrofauna indices AMBI and M-AMBI. A total of 60 benthic macrofauna species were collected and identified. Polychaeta was the most speciose group with 25 taxa （41.67 %） , followed by Mollusca with 13 taxa （21.67 %）. A total of 17 dominant species were identified, but only five species occurred repeatedly during the sampling period. Polycheate was the main contributor to the total abundance, with noteworthy annual variation from 7.07- 40.89 %. Fishes were the main contributors to the total biomass across all sampling years and stations, mainly because of the repeatedly occurrence of fish Odontamblyopus rubicundus. The content of suspended matter and salinity were the mostsignificant influencing factors on the composition of benthic macrofaunal communities, probably due to the high content and capricious salinity levels. The analyses of biotic indices showed that benthic macrofaunal communities had been slightly disturbed, meanwhile the ecological quality remained good or high. Combined analyses showed that this region was subject to the natural perturbation induced by instable environment and substrate instead of anthropogenic disturbance.