Rocky River Watershed Is this watershed healthy or unhealthy? If it is unhealthy, what are the main impairments? By: Laura Hagy, Lydia Gray, and Elizabeth Chiu
Rocky River Facts • Lorain, Medina, Summit, • and Cuyahoga counties • (near Cleveland) • Primary Uses • Cleveland-Hopkins International Airport • Golf Courses • Urban/Farming/Forest • Main impairment: Nutrient Enrichment
Elizabeth’s Hypothesis My hypothesis is that when the DO (Dissolved Oxygen) in the Rocky River increases, the IBI (Index of Biotic Integrity) also increases.
Elizabeth’s Conclusion • Data mostly supports hypothesis • When DO increases, IBI increases • Dissolved oxygen affects fish because they need oxygen to breathe • Dissolved oxygen comes from temperature or riffles • Algae can reduce oxygen levels
Lydia’s Hypothesis As the QHEI (Qualitative Habitat Evaluation Index) increases the IBI (Index of Biotic Integrity) will increase at the same rate.
Lydia’s Conclusion My Hypothesis: As the QHEI increases the IBI will increase at the same rate. When a river has a rocky bottom, and lots of trees around it, you have happy fish, because: • Rocky bottom is breeding ground for fish and macroinvertebrates. • Trees keep pollutants and runoff from river. • Trees keep river cool= more oxygen.
When the health of the substrate increases the ICI or macroinvertebrate community increases in numbers also. Laura’s Hypothesis
Laura’s Conclusion • Data supports hypothesis • Substrate increases, macroinvertebrates increase • Substrate helps macroinvertebrates • Sediments and silt reduce health of substrate
Acknowledgements A great thanks to: • Paula, Shannon, Steve, Leslie, and both Katies • Kim and Megan • OSC,OSU, and YWSI • Our sponsors AEP, Battelle, P&G, and White Castle