2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

6/06/2017 | 12:00 PM - 12:15 PM | THE ROLE OF THE HYPORHEIC ZONE IN URBAN STREAM RESTORATION | 302A

THE ROLE OF THE HYPORHEIC ZONE IN URBAN STREAM RESTORATION

The inclusion of hyporheic design elements is an innovative, but largely untested, approach in urban stream restoration. In fall of 2014, the City of Seattle completed multiple floodplain reconnection projects intended to enhance hyporheic function in the city’s largest urban creek. To evaluate overall biological response, NOAA Fisheries monitored microbial and invertebrate community structure at restored and unrestored reaches, and at forested reference reaches. We found that taxonomic structure of both microbial and invertebrate hyporheic communities was significantly different between restored and unrestored reaches. Microbial heterotrophic production in hyporheic water was greater in restored than in unrestored reaches. Hyporheic invertebrate density and taxa richness were also higher at restored than at unrestored reaches, and comparable to reference reaches. We did not detect differences in nutrient concentrations or benthic invertebrates relative to restoration. Our results examine only the beginning portion of the restoration response trajectory. Further years of monitoring will allow us to better evaluate the role of the hyporheic zone in urban stream restoration.

C16 Restoration Ecology
C08 Urban Ecology
S23 Rehabilitating urban streams: perspectives from science and management

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Presenters/Authors

Sarah Morley (), NOAA Fisheries, sarah.morley@noaa.gov;