Abstract
Gardeström, J., D. Holmqvist, L. E. Polvi, and C. Nilsson. 2013. Demonstration restoration measures in tributaries of the Vindel River catchment. Ecology and Society 18(3): 8. https://doi.org/10.5751/ES-05609-180308
Highlights
Flowing, freshwater systems have been degraded globally by direct and indirect human influences (Maddock 1999, Malmqvist and Rundle 2002, Nilsson et al 2005b)
In 2010, 10 of these sites became the subject of demonstration restoration, where large boulders and large wood from upland areas were placed in the channels to compensate for the previous losses, following the recommendations of Helfield et al (2007)
Pairwise comparisons of velocity coefficient of variation (CV) between reference and demonstration sites on the same stream did not show any significant differences before restoration of demonstration sites, which is to be expected
Summary
Freshwater systems have been degraded globally by direct and indirect human influences (Maddock 1999, Malmqvist and Rundle 2002, Nilsson et al 2005b). Growing awareness of the value of healthy ecosystems and the need to adapt to future changes in climate has put a focus on restoration of ecosystems, especially rivers (Bernhardt et al 2005, Nilsson et al 2007, Palmer et al 2008, Arthington et al 2010). Recent river restoration approaches include renaturalization of flows; that is, environmental flows (Tharme 2003) and flood protection (Nardini and Pavan 2012); reconfiguration of channels (Nilsson et al 2005a); defragmentation, that is, dam removal (Bednarek 2001, Lejon et al 2009), and rebuilding of populations (Luhta et al 2012). Some ecological restoration projects apply a trial and error approach to developing methods, whereas others rely on simple guiding principles or myths (cf Hilderbrand et al 2005). The potential for learning from, and improving on, restoration efforts is poorly utilized, because few projects are monitored to demonstrate the longer term results of restoration, and even fewer projects will report on failures (Bernhardt et al 2005, Jähnig et al 2011, Kondolf et al 2011)
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