Adult caddisfly (Trichoptera) community assemblages were studied in nine streams located in the transitional zone of the Ozarks and tallgrass prairie ecoregions. Seventy-two species, 36 genera, and 15 families were collected from among these streams. Cluster analysis showed taxa similarity among sites was grouped by geographic proximity rather than stream type, but, within the primary clusters, there also was separation among the streams. Predominantly spring-fed streams were less closely related to the other streams in those clusters. Among streams within a park, there were distinct differences among their respective faunas, which is likely due to local physical and chemical differences in those streams. An NMDS analysis was consistent with the similarity analysis with streams ordinating primarily based on geographic proximity (stress = 0.07, R² = 0.76) and not stream type (multiresponse permutation procedure: A = 0.289, p = 0.003). Results from free permutation testing showed half of the environmental variables included in the model were significant (p ≤ 0.05). The most important findings of this study are that highest taxa similarities were among streams in the same park (local scale) as opposed to similar stream types among parks (regional scale), but there also was substantial variation among stream types within parks due to local factors.

在位于Ozarks和高草草原生态区过渡区的9条溪流中研究了成年鳞翅目（Trichoptera）群落组合。从这些溪流中收集了72种，36属和15科。聚类分析表明，站点之间的类群相似性是按地理邻近度而不是按流类型进行分组的，但是在主要聚类中，流之间也存在分隔。以春季为主的水流与这些集群中的其他水流关系不大。在公园内的溪流中，它们各自的动物区系存在明显的差异，这很可能是由于这些溪流中的局部物理和化学差异所致。NMDS分析与相似性分析一致，主要基于地理邻近性（应力= 0.07，R²  = 0.76）而不是流类型（多响应置换过程：A = 0.289，p = 0.003）。自由置换测试的结果表明，模型中包含的环境变量中有一半是显着的（p≤0.05）。这项研究最重要的发现是，同一公园（地方尺度）的溪流之间的类群相似度最高，而公园之间（区域尺度）的溪流类型相似，但由于当地环境的不同，公园内的溪流类型也存在很大差异。因素。