中文摘要：

估计组织缺氧的效果，沿着 Changjiang 河口和邻近的大陆人架的一个河口坡度的 macrobenthic 社区被分析。这在减少的溶解的氧的时期期间在有环境变量的社区和关系揭示了空间变化() 在夏天的集中。统计分析在三个地区之中在 macrobenthic 社区作文揭示了重要差别：河口地区(EZ ) ，温和地在大陆人架中的 hypoxic 地区(MHZ ) ，和在大陆人架中的 normoxic 地区(NZ )( 全球 R =0.206， P =0.002 ) 。Pairwise 测试证明 EZ 的 macrobenthic 社区作文与 MHZ 显著地不同(pairwise 测试 R =0.305， P =0.001 ) 并且 NZ (pairwise 测试 R =0.259， P =0.001 ) 。在在 MHZ 和 NZ 之间的 macrobenthic 社区没有重要差别(pairwise 测试 R =0.062， P =0.114 ) 。taxa 包括了小、典型地机会主义的 polychaetes，它做了最大的贡献到在地区之间的不同。macrobenthic 社区上的温和组织缺氧的效果是结果不仅减少做集中而且在象温度，咸度，和营养素那样的环境变量的差别，集中由层化引起了。

英文摘要：

To assess the effects of hypoxia, macrobenthic communities along an estuarine gradient of the Changjiang estuary and adjacent continental shelf were analyzed. This revealed spatial variations in the communities and relationships with environmental variables during periods of reduced dissolved oxygen （DO） concentration in summer. Statistical analyses revealed significant differences in macrobenthic community composition among the three zones： estuarine zone （EZ）, mildly hypoxic zone （MHZ） in the continental shelf, and norrnoxic zone （NZ） in the continental shelf（Global R=0.206, P=0.002）. Pairwise tests showed that the macrobenthic community composition of the EZ was significantly different from the MHZ （pairwise test R=0.305, P=0.001） and the NZ （pairwise test R=0.259, P=-0.001）. There was no significant difference in macrobenthic communities between the MHZ and the NZ （pairwise test R=0.062, P=-0.114）. The taxa included small and typically opportunistic polychaetes, which made the greatest contribution to the dissimilarity between the zones. The effects of mild hypoxia on the macrobenthic communities are a result not only of reduced DO concentration but also of differences in environmental variables such as temperature, salinity, and nutrient concentrations caused by stratification.