| 红水河干流梯级运行后底栖动物的演替 |
| The succession of zoobenthos in the mainstream of Hongshui River after the cascade reservoirs were built |
| 投稿时间：2010-06-23 修订日期：2010-07-22 |
| DOI： |
| 中文关键词:红水河、梯级、底栖动物、演化 |
| 英文关键词:Hongshui River Cascade reservoirs Zoobenthos Succession |
| 基金项目:中国水电顾问集团中南勘测设计研究院红水河干流水电梯级开发对生态环境影响的调查研究——红水河电站建设对水生生态影响后评价研究。 |
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| 中文摘要: |
| ２００９年７月、１１月对红水河６座已建梯级河段底栖动物进行了２次调查。通过对照各梯级成库前后资料，分析评价底栖动物的演替特点。结果表明：６座梯级建成后，开发河段底栖动物种群结构由急流型向静水、缓流型转化，大部分水域种类数量下降，原流水型软体动物分布范围大幅萎缩；底栖动物密度整体较成库前增加，其中上、中游梯级河段底栖动物密度增加相对明显；由于各梯级水库特征差异，大型软体动物区域分布不均衡，导致各河段底栖动物生物量较蓄水前增减不一，变幅较大。影响红水河流域梯级底栖动物演替的因素较多，主要有水体流速、底质状况、营养负荷、水位等，其中水体流速不仅对底栖动物种群结构演替直接产生影响，对库区泥沙淤积、营养盐滞留也有一定的制约，是红水河干流梯级底栖动物演替的主导因子。 |
| 英文摘要: |
| Two investigations of zoobenthos have been completed on the six cascade development reach on Hongshui River on July and November of 2009. With the comparison of the data collected before and after the formation of the reservoirs and the analysis and access of succession of characteristics of zoobenthos，some important results are concluded as follow: The population structure of the macro-invertebrates shifted from rapid flow type to slow flow type，the species in most reach declined，the distribution of rapid flow type mollusk declined. The density of macro-invertebrates increased，especially in the upper and middle reach. Macro mollusk distributes unbalanced because of different characteristics of the reservoirs and this result in the different change trend of zoobenthos biomass. There are some factors，such as the velocity，substrate，nutrient load，water level and so on，can affect the succession of characteristics of zoobenthos on Hongshui River, and the velocity is the key factor which is not only affect the succession but also affect the sediment deposition and nutrient retention. |
| 简东,黄道明,常秀岭,张庆,谢山,谢文星,杨汉运.2010.红水河干流梯级运行后底栖动物的演替[J].水生态学杂志,31(6):12-18. |
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