160 Ecosystem Services http://www.weyerhaeuser.com/Sustainability/Planet/SustainableForestry/EcosystemServices[7/24/2013 3:17:55 PM] Fire resistance All Weyerhaeuser timberlands Acres burned (not including prescribed burns) 5,430 back to top SUPPORTING These services enable the other categories to work, and they include such things as soil formation, nutrient cycling, primary production and water cycling.