| 田艺苑,杨薇,刘强,王烜,赵彦伟.白洋淀流域水文连通对浮游植物群落的影响[J].农业环境科学学报,2021,40(7):1538-1547. |
| 白洋淀流域水文连通对浮游植物群落的影响 |
| Effects of hydrological connectivity on phytoplankton community in Baiyangdian Basin， China |
| 投稿时间：2020-11-19 |
| DOI：10.11654/jaes.2020-1337 |
| 中文关键词: 水文连通 浮游植物 冗余分析 白洋淀流域 |
| 英文关键词: hydrological connectivity phytoplankton communities redundancy analysis Baiyangdian Basin |
| 基金项目:国家水体污染控制与治理科技重大专项（2018ZX07110001）；国家重点基础研发计划项目（2017YFC0404505）；国家自然科学基金面上项目（52079006） |
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| 中文摘要: |
| 为探究水文连通对白洋淀流域浮游植物群落分布特征的影响，并揭示其关键影响因子，于2019年6月27日—7月4日在白洋淀流域开展了水文水质及浮游植物调查，结合流域内闸坝空间分布，计算了白洋淀流域河湖水系的连通性强度指数（Longitudinal connectivity index，LoC）；利用多元统计分析方法，如非度量多维尺度分析和冗余分析等方法，探究了水文连通对白洋淀流域浮游植物群落结构、优势种物种丰度变化的影响。结果表明：王快水库上游河流的LoC指数最高（0.84），府河、白沟引河及孝义河等入淀河流LoC指数较低（0.06~0.08）。白洋淀流域浮游植物生物量及物种丰度呈现空间差异，其中，孝义河浮游植物的生物量最大，约为3.07 mg·L-1，西大洋水库上游河流最小（0.30 mg·L-1）；白洋淀淀区浮游植物的物种丰度最大，为5.13×106 cell·L-1，王快水库上游河流最小（1.62×105 cell·L-1）。多元统计分析结果表明，按浮游植物相似性特征，白洋淀流域可分为水库上游河流、入淀河流及淀区3个区域；且影响各个区域浮游植物群落特征的关键因子有所不同，其中水库上游河流浮游植物受COD、TP及流速的影响，入淀河流受COD、TN及流速的影响，而淀区则受DO、TP和COD的影响。 |
| 英文摘要: |
| This study aimed to determine the effects of hydrological connectivity and identify the key factors affecting the phytoplankton community in the Baiyangdian Basin. Based on the dams' distribution, the longitudinal connectivity index（LoC） of the rivers were calculated using the reciprocal of the number of dams in each 100 km riverway. Furthermore, the study surveyed the phytoplankton community based on a field survey conducted from June 27th to July 4th 2019. The study performed non-metric multidimensional scaling （NMDS） and redundancy analysis（RDA） to determine the phytoplankton's spatial distribution and the key factors affecting the phytoplankton community in the Baiyangdian Basin. The results showed that the highest LoC index was in the Wangkuai upstream rivers （0.84）, and the lowest were in the Fu, Baigouyin, and Xiaoyi Rivers（0.06~0.08）. The NMDS analysis results showed that the basin could be divided into three regions： reservoirs' upstream rivers, midstream rivers, and Baiyangdian Lake. The key environmental factors affecting the dominant phytoplankton species among the three regions differed based on the RDA analysis. The dominant phytoplankton species in the reservoirs' upstream rivers were affected by COD, TP, and flow rate; by COD, TN, and flow rate in midstream rivers; and by DO, TP, and COD in Baiyangdian Lake. |
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