Riparian ecosystems are among the ecosystems that are most affected by humans. Free-flowing watercourses in the boreal region have seasonal flow patterns, and climate change is expected to alter these flow patterns. The report aims to examine the effect that changes in flood frequency have on riparian vegetation along the Vindel River at Strycksele, Västerbotten, Sweden, by analyzing areas transplanted between two different elevation levels in 2000. The similarity in species composition of these transplanted plots was compared to the typical composition for each elevation in 2000, 2014, and 2023. The results were used to answer the following questions: i) does the vegetation composition in the transplanted plots match the typical composition in their new elevations over time; ii) is the rate of change in vegetation after transposal higher at lower elevations, where the influence of flood frequency is greater? A Jaccard Similarity index, two regression models, and one ANOVA were used to answer the first question i). To answer the second question, ii) was the first regression model used. The regression for the two elevation levels was compared to determine where the change toward similarity happened faster. The transposed plots for both high and low elevation were fully adapted in 2014; the species composition matches the typical composition in low elevation. The change toward similarity between transplanted and control plots happened faster at the low elevation. The transplanted plots at high elevation, which originated from low elevation, reached an alternative stable state where they differed from both elevation levels in terms of species composition in 2014 and barely changed between 2014 and 2023.