Presentation on theme: "Chapter 11: Forestry and Resource Management"— Presentation transcript:
1Chapter 11: Forestry and Resource Management Mr. ManskopfNotes also at
2Essential Questions Covered Describe the impact of human activities on the land.What are some local and federal laws governing land usage.
3Section 1 Resource Management Explain the importance of managing specific renewable resources.Describe several resource management approaches.
4Renewable Resource Management Resources are either renewable, such as soil, or nonrenewable, such as fossil fuels.Goal is sustainability— resource use that occurs only as fast as can be naturally replaced.
6Renewable Resource Management Must balance human and ecological needsWhat are some of our economic and ecological needs in:ForestsWild animalsClean waterSoil
71)Maximum Sustainable Yield (MSY) Goal: To harvest maximum resources without compromising future harvestsPROBLEMS:MSY can affect interactions between species and alter entire ecosystems.Determining target population size is largely a matter of trial and error.
82) Ecosystem-Based Forest Management Goal: To harvest resources while minimizing effects on the rest of the ecosystemEcologically sensitive areas are carefully monitored and protected; resources are harvested selectively.
9Ecosystem Based Management PROBLEM: Ecosystems are complex, so choosing which areas to protect and which to harvest is a challenge. Requires a lot of ecosystem knowledge
103) Adaptive Forest Management • Goal: To gather data from areas managed in different ways, and develop a customized management plan based on the resultsManagement practices are continually monitored and adjusted.Can be time-consuming and may require changing established practices
11Section 1 ReviewExplain the importance of managing specific renewable resources.Describe several resource management approaches.
132) Which approach to resource management aims to harvest resources in ways that minimize impact on the ecosystem and processes that provide the resource?maximum sustainable yieldB. ecosystem-based managementC. adaptive managementD. watershed management
143) A renewable resource is harvested sustainably if A 3) A renewable resource is harvested sustainably if A. the amount of replacement is less than the amount harvested. B. the amount of replacement is equal to the amount harvested. C. soil erosion is prevented. D. replacing trees costs less than harvesting trees.
15Short Answer4) Pick one of the types “Management Approaches” (Maximum Sustained Yield, Ecosystem-Based or Adaptive) and explain at least 1 pro and con of that approach.
16Section 2 Forests and Their Resources List several ecological and economical values of forest resources.Describe the costs and benefits of different methods of timber harvesting.Analyze impacts of deforestation around the world.
17Value of Forests Ecological value: Provide habitat for organisms Source of biodiversityPrevent erosionPurify waterStore carbon, release oxygen
18Value of Forests Economic value: Timber for lumber and fuel Source of foodRaw material for many medicines
19Timber Harvesting Methods Three Methods Three methods: Clear-cutting, seed-tree or shelterwood approach, and selection systemMay result in even-aged or uneven-aged regrowthEven-aged regrowth tends to be less biodiverse than uneven-aged regrowth
211) Clear CuttingInvolves cutting down all trees in a region, resulting in even-aged stands of regrowthChanges abiotic conditions in the area, including light penetration, precipitation, wind, and temperature
252) Seed-Tree and Shelterwood Approaches Seed-tree: Small numbers of mature, healthy trees are left standing, to reseed the area.Shelterwood: Involves leaving a few mature trees standing to provide shelter for seedlings
293) Selection LoggingRelatively few trees are cut at once under a selection system.Selection can involve widely spaced single trees or groups.
30Selection Logging Benefits: More biodiverse, uneven-aged growth Less overall environmental damageCosts:Machinery disturbs forest interior.Expensive processMore dangerous for loggers
31DeforestationDeforestation in tropical and arid regions has the most negative effects due to loss of biodiversity and desertification risk respectively.Globally, deforestation adds CO2 to Earth’s atmosphere
32Deforestation in U.S.Deforestation for timber and farmland facilitated U.S. expansion.By the early 1900s, very little old-growth forest (forest that has never been logged) remained in the United States.
33Old-Growth Forests Have never been logged Contain rich species diversity
34Worldwide Deforestation Timber from old-growth tropical rain forests is a source of income in developing nations.Advanced technology enables deforestation to occur far fasterDeforestation of tropical rain forests has an enormously impact on global species diversity.
37Decreased soil fertility from erosion DeforestationDecreased soil fertility from erosionRunoff of eroded soil into aquatic systemsPremature extinction of species withspecialized nichesLoss of habitat for migratory species such asbirds and butterfliesRegional climate change from extensive clearingReleases CO2 into atmosphere from burningand tree decayAccelerates flooding
38Section 2 ReviewList several ecological and economical values of forest resources.Describe the costs and benefits of different methods of timber harvesting.Analyze impacts of deforestation around the world.
39Section 2 Quiz1) One disadvantage of the selection system of timber harvesting is that itproduces even-aged stands.B. produces a monoculture.C. causes soil erosion.D. is more dangerous for loggers.
402) Deforestation is particularly harmful in arid regions because it can lead to A. desertification B. a massive loss of biodiversity. C. loss of jobs D. a decrease in greenhouse gases.
413) Which type of forest most likely contains the greatest variety of habitats? A. old-growth forests B. even-aged stands C. plantations D. monocultures
424) How do forest plants prevent soil erosion? Short Answer4) How do forest plants prevent soil erosion?
435) Which method of timber harvesting leads to the greatest uneven-aged stands of regrowth?
446) Which method of timber harvesting is likely to be most costly for a timber company? Why?
45Section 3 Forest Management Explain how logging is managed in U.S. National Forests.What impacts does fire suppression in U.S. forests have?What are ways consumer demand impacts forestry practices?
46Figure 11-6b Page 198 National forests National parks and preserves (and Xs) National wildlife refuges
47Figure 11-6a Page 198 National parks and preserves National forests (and Xs) National wildlife refuges
48Most logging in the U.S. takes place on private land, but timber companies are also allowed to harvest trees in National Forests under supervision by the U.S. Forest Service.
49U.S. National Forests Originally set aside to grow trees for timber Today, managed by the U.S. Forest Service, for timber, recreation, wildlife habitat, and miningestablished in 1905
50National Forest Management Act (1976) Requires that resource management plans be made for each national forestPlans are required to be consistent with the principles of multiple use and maximum sustainable yield.
51NFMALogging has declined in national forests since passage of the Act, but policies are vulnerable to political influence
58Fire Suppression Negative effects on ecosystems that depend on fire Fuel for future fires accumulates (limbs, sticks, and leaf litter).Suppressing small fires increases likelihood of larger, dangerous fires.
60Prescribed Burns:* Carefully controlled burning helps to reduce fuel buildup and to restore ecosystems.Rarely burn out of control, but occasional accidents frighten the public.
61Sustainable Forestry Products Independent organizations certify that wood products are produced sustainably.Forest Stewardship Council (FSC) has the strictest standards and most widely accepted certification process.Certified wood costs more to produce, but will be supplied by timber companies if there is demand.
63Section 3 ReviewExplain how logging is managed in U.S. National Forests.What impacts does fire suppression in U.S. forests have?What are ways consumer demand impacts forestry practices?
64Section 3 Quiz1) Prescribed burns are fires that A. are caused by lightning. B. are set by humans. C. never get out of control. D. increase the risk of injury.
652) The National Forest Management Act A 2) The National Forest Management Act A. requires plans for national forests that follow multiple use and maximum sustainable yield guidelines. B. requires plans for national forests that follow multiple use and ecosystem-based management guidelines. C. encourages prescribed burning as a means of protecting national forests. D. promotes the removal of small trees and underbrush by timber companies.
663) Smokey the Bear’s message resulted in A 3) Smokey the Bear’s message resulted in A. an increased number of forest fires. B. an increase in biodiversity. C. suppression of all forest fires. D. a loss of lives.
674) Fire suppression can result in a(n) A. increase in animal habitats 4) Fire suppression can result in a(n) A. increase in animal habitats B. buildup of material that fuels future fires. C. decrease in property damage D. an increase in the jack pine population.
685) Prescribed burns A. are carefully controlled. B 5) Prescribed burns A. are carefully controlled B. cannot be controlled. C. cause fuel buildup D. cause permanent damage to ecosystems.
696) If a wood product is certified by the Forest Stewardship Council, it was produced A. using sustainable methods B. from trees grown on a plantation. C. from recycled materials D. because consumers demanded it.