The following is a brief summary of an evaluation report on work along the Sir John A. Macdonald Parkway by residents of Champlain Park. Click here to read the full report.
Over the last decades, the National Capital Commission (NCC) woodlands along the Ottawa River at Champlain Park have suffered from clearing, the ice storm of 1998, and the arrival of invasive species. Since 2011, Champlain Park’s Environment Committee has mobilized volunteers in response to this situation – to increase native plant biodiversity in the public woodlands and residential area. They’ve planted native trees, shrubs, spring ephemerals, and summer flowering plants in small, compact areas cleared of non-native invasive vegetation.
Volunteers focused on three areas. In two, they developed a novel approach to planting to overcome the problem of very thin soil. They built mounds using rotting wood and debris, left after the NCC removed dying ash trees and invasive buckthorn. They added soil and planted a variety of young native trees, such as Paper Birch, White Cedar, Sugar Maple, and Black Cherry. In fall, they added leaves around the trees as mulch and insulation.
In the third area, volunteers also created a pollinator garden, again by building up a layer of soil and debris and protecting the plants with leaf litter. Considerable effort went into preparation, as buckthorn stumps were dug out by hand and all berries were removed from the site. A low stone wall was constructed around the garden, to keep soil in place. Plants and shrubs were carefully watered over the summer and were healthy at the end of the season.
Expected environmental benefits of the project
- Native plant biodiversity will have been established in previously degraded patches of public woodlands, thereby providing new habitat better suited to native insects, birds and small mammals.
- The medium and long-term potential of the woodlands for carbon sequestration will have been enhanced while providing scope for the development of native ground cover and protective tree canopy.
- Seed sources of native species will have been established, thereby creating a launching pad for the natural spread of native species and positive competition in response to non-native, invasive plants in the area.
- The patches of new native plants may also help break the cycle of arrested succession, at least around the three locations.
Funding for this project was provided by local residents and the City of Ottawa Community Environmental Projects Grant Program.