Boreal forests, renowned for their rich biodiversity, are largely supported by understorey plants that dominate the forest floor. These vascular and non-vascular plants are crucial in maintaining soil stability, carbon sequestration, nutrient cycling, and moisture regulation. However, their existence is increasingly threatened by disturbances, which often occur simultaneously rather than in isolation. Therefore, our research project aims to explore the impacts of multiple disturbance interactions on understorey plants. To accomplish this objective, pre-existing datasets from two distinct ecological regions of Quebec, the Abitibi-Lowlands, and Lake Matagami, were compiled and combined with additional fieldwork. Disturbance maps for forest fires, insect outbreaks (spruce budworm and forest tent caterpillar), harvested areas, mines, forest roads, and hydroelectric transmission lines highlighted 842 plots, of which 747 were disturbed and 95 undisturbed. We applied different buffer distances to these disturbances: 200m for fires, harvesting, and mining; 60m for insect outbreaks; and 100m for forest roads and transmission lines. We then categorized disturbances into direct-direct (e.g., fire and harvesting) and direct-indirect (e.g., core disturbance with a buffer). To ensure adequate geographic representation, we added 25 sampling plots in those disturbances combination that has no existing plots from previous studies using stratified sampling methods based on accessibility (within 500m of a road) and ecosystem types (conifer, deciduous, and mixed). In each 5m × 10m plot, we recorded ecosystem type, canopy density, dominant tree species, organic layer thickness, and soil texture. Bryophytes were sampled from various microhabitats (tree bases, roots, dead wood, stumps, snags, rocks, and ground/litter) using the floristic habitat sampling technique. Similarly, the percentage cover of vascular plants was measured using 1m × 1m quadrats, randomly placed within each plot. Additionally, habitat parameters such as topography, soil characteristics, and NDVI (Normalized Difference Vegetation Index) data will be extracted for each sampling plot using remote sensing. To examine how compound disturbances in different ecosystem types affect vegetation, a generalized linear model will be used, with species presence/absence and richness as responses for diversity and composition, respectively. Different combinations of disturbances and habitat parameters will serve as predictors. This research is expected to identify the impacts of both individual and compound disturbances on the diversity and composition of understorey communities. The results will contribute to a better understanding of how to implement sustainable management practices for the conservation and management of understorey communities on a landscape scale in the boreal biome.