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中文摘要：
根据2010年8月至2011年明在崇明东滩潮间带进行的大型底栖动物定量采集样品资料，利用Brey（1990）的经验公式分析了调查区域内大型底栖动物栖息密度、生物量、次级生产力和P／B值．结果表明：以去灰干质量（AFDM）计，5月、8月和11月总平均栖息密度、总平均生物量、总平均次级生产力和总平均P／B值分别为637．83indm^-2、6．82gm^-2、6．71gm^-2a^-1和1．01a^-1．纵向梯度上，总平均栖息密度、总平均生物量、总平均次级生产力三者大小排序均为东旺沙≥捕鱼港〉团结沙．分析表明，潮间带次级生产力受软体动物影响明显，其中河蚬（Corbiculafluminea）、黑龙江河蓝蛤（Potamocorbulaamurensis）、缢蛏（Sinonovaculaconstricta）、光滑狭口螺（Stenothyr日glabra）、泥螺（Bullactaexarata）和中华拟蟹守螺（Cerithideasinensis）这6种优势种贡献了崇明东滩潮间带65．24％的次级生产力．调查区域总平均P／B值为1．01a^-1，推测东滩大型底栖动物平均一年更替一代，群落结构不稳定，受外界影响较大．运用主成分分析（PCA）对断面环境状况进行分析，显示团结沙生境状况最稳定，捕鱼港次之，东旺沙最剧烈．对次级生产力影响因子进行相关性分析，发现除生物量、栖息密度外，水体总氮、总磷对其也存在较大影响．采用典范对应分析（CCA）解析断面各季节大型底栖动物群落次级生产力与环境变量的关系，显示断面群落次级生产力环境影响因子不尽一致，东旺沙影响因子为Sal、TP、TOC及DO；捕鱼港影响因子为TN、TOC、Chla及DO；团结沙生境状况极稳定，受环境因子影响极小，分析其次级生产力影响因子可能更偏向于沉积物理化因子。
英文摘要：
Macrobenthos samples were collected from three sections in the intertidal zone of the Changjiang Estuary in August 2010, November 2010 and May 2011, and the parameters of the density, biomass, secondary productivity, and P/B value of the macrobenthos were measured based on the equation by Brey （1990）. The foundings indicated that the total mean density of the macrobenthos was 637.83 ind m-2, total mean biomass in ash free dry mass （AFDW） was 6.71 g mz, total mean annual secondary productivity was 6.91 g mz a-l, and total mean annual P/B value was 1.01 a-1, respectively. Three sections ordered by the total mean density, biomass, secondary productivity, and P/B value was Dongwang sand 〉 Buyu port 〉 Tuanjie sand. The secondary productivity was mainly influenced by Crustacea with six critical species, including Corbiculafluminea, Potamocorbula amurensis, Sinonovacula constricta, Stenothyra glabra, Bullacta exarata and Cerithidea sinensis, and the six species contributed 65.24% of the total. Based on the data of total mean annual P/B value （1.01 a~）, It was speculated that the average change of macrobenthos was year-generation, and community structure was instability and obviously influenced by the environment. The analyses of secondary productivity combination of variables indicated that the secondary productivity was not only impacted by the biomass and density but also by the total nitrogen and total phosphorus of water. The results of Principal Components Analysis （PCA） on the environmental variables showed that the environment in Tuanjie Sand was the most stable, Buyu Port was less stable, and Dongwang Sand was the most violent one. The relationship between environmental variables and the secondary productivity of community was analyzed using Canonical Correspondence Analysis （CCA） , and Sa, TP, TOC and DO were found to be the key factors to the secondary productivity in Dongwang Sand macrobenthos communities; TN, TOC, Chla and DO in Buyu port. Furthermore, the habitat of Tuanjie Sand was
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