Macroinvertebrate Diversity in Urban vs Rural Streams after Storm Events

Jessi Urichich Thomas More College, Abby Hutcheson Thomas More College, Olivia Blasdel University of Evansville
Faculty Sponsor(s): Chris Lorentz Thomas More College
Increased flooding from frequent storm systems threatens infrastructure as well as stream ecology. The importance of stormwater management will escalate in order to control the influence of increased runoff on stream stability and biological communities. After a series of storm events, macroinvertebrate diversity shifts as substrate and streambed morphology changes. Twelvemile Creek, a stream with a predominantly agricultural watershed, and Taylor Creek, a stream with an urban watershed, were sampled during a chain of rain events and the diversity of macroinvertebrates over time was studied. Twelvemile Creek had a smaller Shannon-Weiner Index value (1.17) than that of Taylor Creek (1.55) 48 hours after the first storm. However, Twelvemile Creek yielded a larger diversity index value (1.10) than that for Taylor Creek (0.14) 48 hours after the second storm. The diversity index values for Twelvemile Creek were more consistent than those of Taylor Creek, however the data implicates that successive storm events may decrease macroinvertebrate diversity and overall recovery in urban streams.
Sustainability, Urban Ecology & Environmental Studies
Poster Presentation