A limited number of studies have examined the effects of river-floodplain connectivity on macroinvertebrate community structure and diversity, and even fewer have utilized a multi-spatial scale approach.  This study is assessing these effects by sampling macroinvertebrates within the vegetated shoreline of eighteen floodplain waterbodies with different degrees of connectivity to the Arkansas River.  Present analysis includes core samples from 3 floodplain waterbodies contiguous with the main channel and 3 waterbodies intermittently connected during supra-bankfull flooding.  Of the 61 taxa collected, 11 were only found in contiguous sites and 17 were only found in intermittent sites.  Contiguous sites were characterized by taxa such as Corbicula fluminea and unionid mussles that are common in the main channel.  Intermittent sites were characterized by a high diversity of Hirudinea, Coleoptera, and Odonata taxa.  There was no significant difference in α diversity between contiguous and intermittent sites; however, the β-1 diversity index was higher in the intermittent sites (32.427) than contiguous sites (29.517).  Results indicate that waterbodies with different degrees of connectivity have distinctive macroinvertebrate communities, and that the higher β-1 values for intermittent sites may be a result of variable flooding frequencies which range from every 1yrs to >15yrs.