Fig. 5. Transect trajectories on PCA axes 1 (horizontal) and 2 (vertical) based on the PCA factor scores. The two axes explain 41% and 22% of the variance, respectively, in species composition and cover. The trajectories denote the changes in vegetation occurring through time on the four constructed islands (islands 1-4; a-d) and the reference marsh on Nunn’s Island (e). The islands have been graphed separately to emphasize interisland differences, although the PCA was performed on the combined data from all islands. Trajectories begin at the 1983 transect position, move through 1984, 1985, 1986, and 1988, and terminate at the 1994 position (except transects 10 and 11, which terminate in 1988), where the transect number and arrowhead are shown. For the created island plots (a-d), solid (green) lines denote transects through planted areas; broken (orange) lines denote transects through unplanted areas.