Soil Tests for Urban Parks

This research project, funded by the Landscape Architecture Canada Foundation, examined the ecological impacts of dog activity in Allan Gardens, a highly frequented downtown Toronto park with diverse users. Observational studies revealed that dogs utilize the entire park rather than remaining within the designated off-leash area. Based on these findings, we collected soil samples from four high dog-use locations and one control site inaccessible to dogs.

To evaluate potential changes in soil chemistry, we collaborated with Jack Legg at SGS Canada to develop a custom soil analysis. Tests measured Nitrate Nitrogen, Ammonium, total salts, and Kjeldahl Nitrogen, providing insight into nutrient loading and salinity shifts associated with canine presence.

Recognizing that soil health extends beyond chemistry, we partnered with Michael Lynch at Metagenom Bio to conduct DNA-based microbial and fungal assessments. Composite samples were analyzed to detect variations in microbial diversity and activity, offering a deeper understanding of how dog use influences soil ecosystems.

This integrated approach—combining observational data, chemical testing, and genomic analysis—provides a foundation for evidence-based strategies to manage urban parks for ecological resilience while accommodating the needs of all users, including dogs.