| 摘要: |
| 研究香溪河大型底栖无脊椎动物群落结构和季节动态特征情况，发现高翔蜉、萝卜螺、河蚬、湖沼股蛤、四节蜉为香溪河水系优势分类单元，各季节底栖动物优势种的组成存在显著差异。冬季的生物密度、生物量、生物多样性指数显著高于其他季节，说明冬季的河流生境最适宜大型底栖无脊椎动物生存。香溪河刮食者丰度最高，撕食者最低，表明香溪河着生藻类丰富；固着型底栖动物在香溪河底栖类群中丰度最高，说明香溪河河流流速较快，生境更适宜固着型动物栖居。不同季节环境因子对大型底栖动物群落结构有显著影响。 |
| 关键词: 香溪河 大型底栖动物 群落结构 季节 |
| DOI：10.14188/j.ajsh.2019.06.007 |
| 分类号:S963.21+5 |
| 基金项目:环保部生物多样性保护专项“生物多样性调查与评估试点项目”2019HJ2096001006 |
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| Seasonal dynamics of community structure of large benthic invertebrates in Xiangxi river |
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ZHENG Ziye1,XU Yahong1,ZHANG Ying1,WANG Jianzhu1,2,LUO Zunlan3
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1.College of Biology and Pharmacy, Three Gorges University ，Yichang 443002， Hubei, China;2.Three Gorges Reservoir Area Ecological Environment Education Engineering Research Center，Yichang 443002，Hubei, China;3.Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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| Abstract: |
| In order to understand the community structure and seasonal dynamic characteristics of the large benthic invertebrates in Xiangxi river, Epeorus spp., Radix spp., Corbicula fluminea, Limnoperna lacustris and Baetis spp. were found as the dominant units of the Xiangxi river water system. There are also significant differences of the composition of dominant species of benthic animals in every season. The winter density, biomass and biodiversity index were significantly higher than other seasons, indicating that winter river habitats are most suitable for large benthic invertebrates. Xiangxi river has the highest abundance scrapers and the lowest rate of shredders, indicating that the Xiangxi river is rich in algae. The fixed benthic animals have the highest abundance in the benthic group of Xiangxi river, indicating that the Xiangxi river has a faster flow rate and its habitat is suitable for sessile animals. |
| Key words: Xiangxi river macrobenthos community structure season |
