Description:
<jats:p>We investigated the effects of juvenile <jats:italic>Buenoa macrotibialis</jats:italic> on the small bodied (<500 mm) zooplankton assemblage with which it naturally occurs. By monitoring 37–46‐liter enclosures with and without <jats:italic>Buenoa</jats:italic> over 9–12 d, we found that second and fourth instar <jats:italic>Buenoa</jats:italic> caused large declines in the copepod <jats:italic>Tropocyclops extensus</jats:italic> and the rotifer <jats:italic>Hexarthra mira</jats:italic>. Additionally, populations of several small rotifers increased in the presence of fourth instar <jats:italic>Buenoa</jats:italic>, probably because of release from <jats:italic>Tropocyclops</jats:italic> predation, competition, or both.</jats:p>