UBC Undergraduate Research

The Burns Bog Lagg Zone : An Assessment of Hydrological and Biological Indicators in the Bog Avenant, Hannah; Canonizado, Cyra; Jacobson, Robert; Matsuo, Kevin


In the Delta Nature Reserve (DNR), there have been observed changes in the hydrology and ecology. The intention of this community project in the DNR was to examine hydrological and biological indicators within the lagg zone in order to begin the establishment of a monitoring and restoration framework for the Burns Bog Conservation Society (BBCS) to pursue with the Corporation of Delta. Groundwater depth, pH, and electrical conductivity were assessed throughout the area to test whether these values fell within regularly observed ranges for a lagg zone. Along with hydrology, percent cover of understorey species was studied to quantify the effects that trampling by humans and dogs may have on the ecosystem. Finally, a literature review was completed to determine potential methods of invasive species removal within the DNR to find viable options for the BBCS. Spatial patterns in groundwater depth and pH suggested heavy mineral water input from flooding by the stream in the northeast, but additional dipwells should be installed near it to make clearer conclusions. Through percent cover measurements near the boardwalk, it was determined that signage should be placed to dissuade patrons of the DNR from stepping off the boardwalk. Mowing or hand-pulling for policeman’s helmet and mowing and mulching in combination for reed canary grass are the most feasible management methods. A long-term monitoring plan should be implemented to assess hydrological and ecological parameters, with measurements at least monthly to account for seasonal variation while still maintaining feasible monitoring intervals for the BBCS.

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