| 基于浮游生物完整性的汉江中下游生态健康评价 |
| Ecological Health Assessment of the Middle and Lower Hanjiang River Based on Plankton Integriry |
| 投稿时间：2022-11-16 修订日期：2022-12-29 |
| DOI：10.15928/j.1674-3075.202211160460 |
| 中文关键词:浮游植物，浮游动物，生物完整性，汉江 |
| 英文关键词:phytoplankton zooplankton biological integrity Hanjiang River |
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| 中文摘要: |
| 在汉江下游开展浮游生物调查，构建浮游生物完整性指数进行健康评估，为流域环境管理提供科学依据。2020年春秋两季在汉江干流雅口-兴隆河段开展了2次浮游植物与浮游动物调查，并采用基于因子分析的生物完整性指数，对调查河段开展了浮游生物生态完整性评价。研究结果显示：两次调查共检出浮游植物6门95种（属）。春秋两季调查区水体中干流浮游植物的平均密度分别为616×104 个/L和803×104 个/L，平均生物量分别为1.26 mg/L和1.63 mg/L；2次调查共检出浮游动物37属62种，以原生动物和轮虫为主。春秋两季浮游动物平均密度为1036 个/L和1791 个/L，平均生物量分别为0.91 mg/L和1.40 mg/L。调查河段各采样点之间浮游动植物密度相差不大，但是不同季节浮游动植物生物量则存在明显差异。采用因子分析对浮游动植物数据开展分析，筛选了4个公因子（累积解释率65%）。进一步辨析了4个公因子的生态意义，可以看到第一公因子主要反映了浮游生物生物总量，以及浮游动植物比例关系，而其余3个公因子依次反映了浮游植物群落多样性、浮游植物群落丰富度、群落生境流态。在总因子得分表明调查河段秋季生态状况优于春季，并且不同公因子得分从不同的角度反映了调查河段不同季节与位置的水生态状况的差异，进一步结合汉江流域生态特征，表明该方法能够较好地应用于调查河段。 |
| 英文摘要: |
| In this study, a survey of phytoplankton and zooplankton was carried out in the Yakou-Xinglong section of the main stem of Hanjiang River in May (spring) and November (autumn) 2020 along 9 sampling transects. Biological integrity indices of plankton were then developed and used to evaluate the ecological status of the river section using factor analysis. Our aim was to provide scientific data for predicting water quality and evaluating environmental management in the middle and lower reaches of the Hanjiang River Basin. A total of 95 phytoplankton species (genera) from 6 phyla were identified during the two surveys. The average phytoplankton density and biomass were 616×104 cells/L and 1.26 mg/L in spring, and 803×104 cells/L and 1.63 mg/L in autumn. A total of 62 zooplankton species from 37 genera were identified, with dominance by protozoans and rotifers. The average zooplankton density and biomass were 1 036 ind/L and 0.91 mg/L in spring, and 1 791 ind/L and 1.40 mg/L in fall. There were no significant spatial differences in plankton density among the sampling sites, but there was an obvious seasonal difference in plankton biomass between spring and autumn. Four common factors were selected by factor analysis, with the cumulative explanation rate of 65%. The ecological significance of the four common factors was further analyzed and the results indicate that the first common factor primarily reflected the total plankton biomass and the relationship between the phytoplankton and zooplankton biomass. The other three factors reflected phytoplankton community diversity, phytoplankton richness and the flow pattern of habitat. The total factor scores show that the ecological status of the survey in autumn was better than in spring, and the scores of different common factors reflected differences in the aquatic ecology of different seasons and sites. In conclusion, factor analysis is a reliable method for predicting ecological conditions in Hanjiang River. |
| 文 威,李双双,冯桃辉,彭 祺.2023.基于浮游生物完整性的汉江中下游生态健康评价[J].水生态学杂志,44(4):85-91. |
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