Table 1 in Impacts of Wastewater Effluent on Temperate Stream Fish Assemblage Structure

Table 1. PERMANOVA table of results indicating a significant difference in fish assemblage structure between East and West Fork sites (Pseudo-F ¼ 10.481, df ¼ 1, P ¼ 0.0001) after accounting for the effect of the site distance covariate, which does influence fish assemblage structure (Pseudo- F ¼ 7.813, df ¼ 1, P ¼ 0.00015). Stream distance data (between sites) were square root transformed prior to analysis to ensure that distance variation of East and West Fork sites were more comparable. SourcedfSSMSPseudo- FP (perm)Unique permsDistance (covariate)16650.86650.87.8130.00019959Site (East vs. West)18921.98921.910.4810.00019955Res2319579851.26Total2535152表1 置换多元方差分析（PERMANOVA）结果表，显示在控制样点距离协变量的影响后，东支流与西支流样点间的鱼类群落结构存在显著差异（伪F值（Pseudo-F）=10.481，自由度df=1，P=0.0001）；该样点距离协变量本身确实会影响鱼类群落结构（伪F值（Pseudo-F）=7.813，自由度df=1，P=0.00015）。分析前已对样点间的溪流距离数据进行平方根转换，以确保东、西支流样点的距离变异具有更好的可比性。 变异来源 df SS MS 伪F值（Pseudo-F） 置换检验P值（perm） 唯一置换次数（Unique perms） 距离（协变量） 1 6650.8 6650.8 7.813 0.0001995 9959 样点（东vs西） 1 8921.9 8921.9 10.481 0.00019955 9955 残差（Res） 23 19579851.26 总计（Total） 25 35152