^pof;
Life;
Sciences,;
Northwest;
University,;
Xi'an;
710069,;
China;
^pRiver;
Fishery;
Research;
Institute,;
Chinese;
Academy;
of;
Fish-ery;
Sciences,;
Xi'an;
710086,;
China;
^pof;
Life;
Sciences,;
Shaanxi;
Normal;
University,;
Xi'an;
710062,;
China;
植物群落结构; 黄河下游; 环境因子; 浮游植物; 多样性指数; 环境因素; 数据分析; SPSS;