The Department of Lands and Forestry started a provincial forest soil sampling program in 2015 to acquire up-to-date chemistry data for nutrient budget modelling and monitoring purposes. In 2017, the Department also worked with Kejimkujik National Park to re-sample soils at two forest sites first sampled more than 20 years ago. This presentation will provide an overview of results from these projects with a focus on western Nova Scotia conditions
This presentation will provide a rare opportunity to learn about L&F’s progress towards incorporating nutrient budgeting into its Crown land harvest decisions, once promised for mid-2010.
Nutrient depletion of the soils has resulted in severe acidification of surface waters of SW Nova Scotia in particular (but not exclusively). The Map shows watersheds of the endangered Southern Upland salmon populations and the average pH of surface waters. Salmon populations in SW Nova Scotia have been the most severely impacted by acid rain. “Salmon populations in extremely acidified systems ([RED] pH <4.7) are thought to be extirpated (13 rivers), reduced by 90% in moderately impacted systems ([YELLOW] pH = 4.7-5.0; 20 rivers), reduced by about 10% in slightly impacted systems (pH = 5.1-5.4; 14 rivers), and apparently unaffected when pH >5.4 (13 rivers) based on research in the 1980s.” Keys et al. (2016) concluded that clearcutting contributes to further nutrient depletion and soil acidification. Click on the image for a larger version and source.