Evaluating Cumulative Ecosystem Response to Restoration Projects in the Columbia River Estuary, Annual Report 2007

Johnson, Gary E. ; Diefenderfer, Heida L. ; Borde, Amy B. ; Dawley, Earl M. ; Ebberts, Blaine D. ; Putman, Douglas A. ; Roegner, G. C. ; Russell, Micah ; Skalski, John R. ; Thom, Ronald M. ; Vavrinec, John

Pacific Northwest National Laboratory (U.S.)

关键词: Columbia River;    Juveniles;    Habitat;    Salmon;    Land Reclamation;   

DOI  :  10.2172/949141
RP-ID  :  PNNL-17437
RP-ID  :  AC05-76RL01830
RP-ID  :  949141

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of this multi-year study (2004-2010) is to develop a methodology to evaluate the cumulative effects of multiple habitat restoration projects intended to benefit ecosystems supporting juvenile salmonids in the lower Columbia River and estuary. Literature review in 2004 revealed no existing methods for such an evaluation and suggested that cumulative effects could be additive or synergistic. Field research in 2005, 2006, and 2007 involved intensive, comparative studies paired by habitat type (tidal swamp vs. marsh), trajectory (restoration vs. reference site), and restoration action (tide gate vs. culvert vs. dike breach). The field work established two kinds of monitoring indicators for eventual cumulative effects analysis: core and higher-order indicators. Management implications of limitations and applications of site-specific effectiveness monitoring and cumulative effects analysis were identified.