Monitoring the Response of a Riparian Ecosystem to Hydrologic Restoration
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2005-12-01
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Edition:Final Report
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Abstract:This study examined the effects of a stream restoration project on groundwater elevations and the population and habitat of a threatened small mammal, the Preble's meadow jumping mouse (Zapus hudsonius preblei). A series of nine check dams were installed on East Plum Creek in 2001 and 2002, to help restore an incised urban stream channel. This 0.54 mile section of stream is within a heavily urbanized corridor. The dams trapped considerable sediment, raised the stream bed level, and restored groundwater levels within the rooting zone of riparian vegetation. Populations of the Preble's mouse were monitored from 1998 to 2004 in control and treatment areas before and after dam installation. Habitat vegetation cover was also measured at these sites from 2001 to 2004, and groundwater elevations in the study area were monitored. Preble's population estimates were determined for control and treatment areas through a modeling procedure. Preble's abundance increased in both treatment areas following dam installation, although treatment effects may have been different in these two areas. Positive treatment effects were localized and have been short-term to date, and the riparian system is still within a major period of adjustment. Treatment effects may have been partially due to an increase in graminoid cover in treatment areas; Preble's use graminoids for food and cover.
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Main Document Checksum:urn:sha-512:2b9e0cac305307a1bd3be1bf4cdabef7e05c7a45a8b8d2f8d59b1b2949d5e6a2f4c5e01124b1e5783d8c0376e5385edfc808646ac93e08ab6d94c1f7673f10cc