NRC 225 Lecture 24 Outline of Last Lecture I Silvicultural Methods II III IV Shelter Wood Forest goods services function and values Triad Concept Outline of Current Lecture I Overview II Historical Perspective III Key attributes IV Adaption of trees V Types of Fire VI TRIAD for forest fire management Current Lecture Forest Ecosystem and Wildfire Overview Historical Perspective forests people and fire Some key attributes of forest fires Adaption of trees Role of fire in shaping forest ecosystems Adapting to wildfire Historical Perspective Used to clear agricultural land Late 1400 s to 1500 to 1600 s 80 90 of Indians die so forests build up Often tree was girdled because it was too much work to cut to clear field Large quantities of trees were just burned John Burroughs believed in burning everything he could burn Fire is ubiquitous for clearing fields Fire is a disaster sprung onto American see quickly always looked as good CCC was taught that everybody loses when timber burns Trees are good Fires are bad 1947 Smokey the bear rescued from forest fire in Oregon national sensation Eisenhower supports Smokey New notion is Trees are Good Forest are destructive wasteful preventable disasters These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Some key attributes of forest fires Forests need fire as much as they need rain Nutrients of soil Begins Process of regeneration the forest Insects usually beetles work on standing dead trees Profusion of growth of fire weed Animals that feed on the profusion of flowering plants Adaption of Trees to Wildfire Trees are charred but not necessarily burned Ponderosa Pine Some bark can protect because of layers Crown Fire worse fire Serotinous cones on lodge pole pine fire opens these cones In a fire millions of seeds are released and opened up Mosaics in Forest are seen where there are forest fires Types of Fire Surface Fire against the wind 100 800 kWatts meter Surface Fire with the wind 200 15 000 kWatts meter Crown Fire 8 000 40 000 kWatts meter Blow up crown fire up to 150 000 kWatts meter A microwave is kWatts meter TRIAD for Forest Fire Management 1 Reserve Areas Let Burn Policy most national parks have this restore natural ecological function But have effective emergency plans and resources in place 2 Extensively Managed Area Let burn if policy Life and safety threats Water supply threats Fuel load reduction Some use of prescribed fire 3 Intensively Managed Areas Full suppression policy Fire risk minimization Firebreak networks Safety zones around houses and infrastructure Mutual aid networks
View Full Document
Unlocking...