Principles of ecological forestry

摘要: Ecologically sound stewardship has long been a cornerstone of the forestry profession. But just what does ‘ecologically sound’ mean in practice? Historically, foresters were often taught that forest ecosystems could be engineered at will for human benefit. Ensuring ecological integrity meant not violating ‘constraints’ associated with soil, water quality, and wildlife (implicitly defined as well-known birds mammals). Recently, definition expanded; clearly, primary focus is now on maintaining, even restoring, native biological diversity. At same time, growing worldwide demand products encouraged to expand traditional high-yield practices, amidst evidence such systems conflict biodiversity. While discounting difficulty these conflicts, we believe there vision offers hope. To set stage rest this book, define ecosystems, stands, landscapes. Next, review various incarnations forestry, emphasis North American practice strong influence U.S. Forest Service. Hopefully, help readers place current discussion into an historical, scientific, professional context. Important principles are discussed, related timber production forestry. Finally, balanced paradigm, which blends elements described. Ecosystems, landscapes Asked ecosystem , politician who was espousing importance protecting hesitated time then finally said, ‘Well … they're kind like aquarium they have plants animals other stuff.’ In fairness politician, can rather hard define.