Fish Community Structuring in the Restored Hobble Creek Delta: The Importance of Intrinsic Physical Habitat, Flood Dynamics and the Detection of Juvenile June Sucker (Chasmistes liorus) Chad Landress, Utah Division of Wildlife Resources
Background and Need How do we get from this to this?
Background and Need • Old channel was not used by June sucker • Lack of gradient • Debris jams • Diversion structure • Poor habitat within straight levees
Background and Need Completed in November 2008 Converted a 21 acre field into a dynamic delta
Vegetation: • emergent • submergent • filamentous algae • woody debris
Timing of disconnection/reconnection with main channel * pond where June sucker were detected
Species, number, and relative abundance of fish captured at Hobble Creek restoration area 2010, cumulative catch
Non-metric multi-dimensional scaling of fish community structure in Hobble Creek restoration ponds
Dominance, diversity and evenness of potential “sucker ponds” * pond where June sucker were detected
Initial Conclusions • Water temperature • Food supply • Vegetative cover • Flood dynamics structure initial communities • Carp, vegetation, and predators
Acknowledgments: • June Sucker Recovery Implementation Program • Russ Rader • Melissa Stamp • David Tinsley, especially his eyes which spotted a lone June sucker in a seine with thousands of other fish and copious algae.