Jhhhlh - 658 Words

Week 8 212-241 FORESTS -economically valued -timber from coniferous-softwood (important to Canadian economy) -timber from deciduous-hardwood -timber harvested in many ways -clear-cutting -new forestry, sloppy way of clear-cutting to leave trees, mimick natural disturbances -selection systems, some left behind -ecologically valued -NA timber industry focus on fast growing tree species in plantations -plantations more as crop agriculture than ecologically functional forests -maximum sustainable yield, argues for cutting trees shortly after they have gone through their fastest stage of growth -trees may be cut long before grown as large as they would in absence of harvesting -some harvesting seek uneven-aged stands,†¦show more content†¦-REFORESTATION - natural or intentional restocking of existing forests and woodlands that have been depleted -DEFORESTATION - natural forests that are cleared through logging or fire, for timber or use of area, growing pop with expanding demand major cause of deforestation -AFFORESTATION - establishment of a forest or trees where there was no forest -Over the years, harvesting of trees has exceeded the planting of trees and there has been a net loss of approximately 15 million km2. Most of the loss has occurred in the last 30 years. forests are a multifunctional resource: Economic functions (e.g. sources of lumber and other products such as latex and palm oil, fuelwood) Ecosystem functions (e.g. biodiversity, watershed protection, the regulation of climate, storage of nutrients) Social functions (recreation, aesthetics) to be renewable, forest need to be managed sustainably -plant 1 tree for every tree cut, but not necessarily the case -each cutting, forest ecosystems simplified (less biodiversity) -most adopt ecosystem-based management and adaptive management -ecosystem-based management - attempts