Overview

Since the 1980s, over 100 tidal marsh restoration projects have been built in the Fraser River Estuary in B.C., but their long-term success has varied. This study looked at what helps these marshes thrive by analyzing plant communities, site conditions, and changes over time. They found that nearly 10% of the marshes surveyed had shrunk, especially those located farther upriver or in the river’s north branch. Key threats include wave erosion and grazing by Canada Geese. The mix of plant species also changed depending on location, with native species decreasing upriver and invasive cattails taking over some lower estuary areas. Overall, the findings highlight how important thoughtful site design and location are for the success of marsh restoration in a changing environment.