Chapter 11 Flashcards
Instrumental value
Value of an organism, species, ecosystem, or the earths biodiversity based on its usefulness to us
Aesthetic value
I no use value because many people appreciate the tree, Forest, wild species, or a vista because of its beauty
Conservation biology
Multi-disciplinary science that originated in the 1970s.
- it’s goal is to use emergency responses to slow down the rate at which we are destroying and degrading biodiversity
- identifies the most endangered and species rich ecosystems
- based on aldo Leopolds ethical principle that something is right when it tends to maintain the earths life-support systems and other species and wrong when it does not
Hotspots
The most endangered and species rich ecosystems
National Forest system
- Consists of 155 Forest and 22 grasslands.
- these forests are managed by the US forest service, and are used for logging, mining, livestock grazing, farming, oil and gas extraction, recreation, hunting, fishing, And conservation of watershed, soil, and wildlife resources
National resource lands
- Manage by the bureau of land management
- used primarily for mining, oil and gas extraction, and livestock grazing
National wildlife refuge
- managed by the US Fish and wildlife service
- most refugees protect habitats and breeding areas for waterfowl and big game to provide a harvestable supply for hunters
- few protect endangered species from extinction
- permitted activities in the most refugees include hunting, trapping, fishing, oil and gas development, mining, logging, grazing, some military activities and farming
National Park system
- managed by the National Park Service
- includes 56 major parks and 331 national we creation areas, monuments, memorials, battlefields, historic sites, parkways, trails, rivers, seashores, and lakeshores
- only camping, hiking, sportfishing, and boating can take place in the national parks
National wilderness preservation system
- Made up of 660 roadless areas that are the most restricted public lands
- these areas lie within other types of public lands
- managed by agencies in charge of those lands
- most of these areas are open only for retaliation like titties such as hiking, sport fishing, camping, and nonmotorized boating
Old growth forest
- an uncut forest or regenerated forest that has not been seriously disturbed by human activities or natural disasters for at least several hundred years
- Store houses of biodiversity because they provide ecological niches for a multitude of wildlife species
Second growth forest
- A stand of trees resulting from secondary ecological succession
- develop after the trees in area have been removed by human activities or by natural forces
Tree plantation/tree farm
- Managed tract with uniformly age trees of one species that are harvested by clearcutting as soon as they become commercially valuable
- they then are replanted and clear-cut again in a regular cycle
Even aged management
- Involves maintaining trees in a given stand at about the same age and size
- method of forest management in which trees, sometimes of a single species in a given stand, or maintain off at about the same age and size and are harvested all at once
Uneven aged management
-method of forest management in which trees of different species in a given stand are maintain at many ages and sizes to permit continuous natural regeneration
Selective cutting
- cutting of intermediate aged, mature, or diseased trees in an uneven aged for stand, either singly or in small groups
- encourages the growth of younger trees and maintains an uneven aged stand