Article Figures & Data
Figures
- Figure 1.
Location of restoration and reference sites within the South Fork Skagit River Delta, Washington, USA (WADNR 2005, WADOE 2011).
- Table 2.
Description of indicators used to interpret shrubs and trees (S&T), cattail (CT), reed canarygrass (RCG), emergent herbaceous plant (EHP), open water (OW), and anthropogenic modification (AM) classifications from aerial photos.
- Figure 2.
Maps of cover and ground truth transect locations at the restoration and reference sites in 2000 and 2011/2013 within the South Fork Skagit River Delta, Washington, USA.
- Figure 3.
Box-and-whiskers plot of key species vegetation elevation distributions along survey transects throughout the restoration and reference sites. Sample sizes are written above the outliers. The sum of the species points differs from the total number of transect points due to open water (no species) or overlapping species at the same point. The median elevation for each species is shown by the middle horizontal line separating the upper box (2nd quartile) and lower box (3rd quartile). Asterisks denote outlying individuals.
Myrica gale. USDA-NRCS PLANTS Database. Britton, N.L. and A. Brown. 1913. An Illustrated Flora of the Northern United States, Canada and the British Possessions. New York, NY: Charles Scribner's Sons.
Tables
- Table 1.
Site restoration actions, aerial photo, and ground-truth survey timetables for three restorations and two reference sites in the Skagit River Delta, Washington State, USA.
Site Restoration Action Year(s) Completed Aerial Photos Used Ground Surveys Performed Reference Sites N/A N/A 2000; 2011 2001; 2012 Deepwater Slough Dike removal 2000 2000; 2011 2001; 2012 Milltown Island Dike breaching/channel creation 1999; 2006-2009; 2012 2000; 2011 2012 Wiley Slough Dike removal 2009 2000; 2013 2013 - Table 3.
Change in reed canarygrass (RCG), shrubs and trees (S&T), emergent herbaceous plant (EHP), cattail (CT), open water (OW), and anthropogenic modification (AM) percent cover in the restoration and reference sites over eleven or thirteen years.
Reference Marsh Cover (%) Wiley Slough Cover (%) Deepwater Slough Cover (%) Milltown Island Cover (%) 2000 2011 2000 2013 2000 2011 2000 2011 RCG 3.6 4.1 1.0 1.9 22.2 4.7 43.4 40.0 S&T 33.1 32.1 44.3 5.8 27.9 15.0 48.9 47.2 EHP 33.3 19.5 0.2 41.6 1.2 12.8 1.6 5.8 CT 22.1 37.5 1.0 12.5 31.0 60.7 5.4 6.6 OW 7.9 6.8 3.0 35.9 6.6 6.8 0.7 0.4 AM 0.0 0.0 50.5 2.3 11.1 0.0 0.0 0.0 - Table 4.
Error matrix for 2000 Deepwater Slough, Milltown Island, Reference Sites, and Wiley vegetation mapping. RCG is the reed canarygrass classification, S&T is the shrubs and trees classification, EHP is the emergent herbaceous plant classification, CT is the cattail classification, OW is the open water classification.
Classified in Ground Truth as: Total Accuracy RCG S&T EHP CT OW Classified in Orthophoto as: RCG 19 0 0 1 0 20 95% S&T 0 17 0 1 0 18 94% EHP 0 1 25 2 2 30 83% CT 2 8 0 77 0 87 89% OW 0 0 0 0 0 0 — Total 21 26 25 81 2 155 — Accuracy 90% 65% 100% 95% 0% — 89% - Table 5.
Error matrix for 2011 Deepwater Slough, Milltown Island, and Reference Sites and 2013 Wiley vegetation mapping. RCG is the reed canarygrass classification, S&T is the shrubs and trees classification, EHP is the emergent herbaceous plant classification, CT is the cattail classification, OW is the open water classification.
Classified in Ground Truth as: Total Accuracy RCG S&T EHP CT OW Classified in Orthophoto as: RCG 155 2 25 31 0 213 73% S&T 3 142 8 10 0 163 87% EHP 18 4 272 33 6 333 82% CT 26 20 29 777 5 857 91% OW 0 3 26 31 177 237 75% Total 202 171 360 882 188 1803 — Accuracy 77% 83% 76% 88% 94% — 85%
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