Clear cutting & Sustainable Forestry

Which of the following is most likely to occur in a forested region that has been recently clear-cut? A. The concentration of nitrates in streams running through the region will increase. B. The average depth of topsoil will increase. C. The water temperature in streams running through the region will decrease. D. Volume of runoff after rains will decrease. E. The frequency of landslides will decrease.

A. The concentration of nitrates in streams running through the region will increase.

Clear cutting can be economically advantageous but leads to soil erosion, increased oil and stream temperatures and flooding

True

Timber

What we call the trees right when we cut them down

Clear cutting affect on aquatic environment

-Increase Turbidity -Increase in water temperature ( Decrease in dissolved oxygen levels) -Increased Nutrient load (Eutrophication) -Loss of Habitat , loss of biodiversity

Industrial logging threatens many forested ecosystems. Which of the following environmental consequences will most likely result from clear-cutting deciduous forests for logging? A. More carbon dioxide will be added to the atmosphere and increase anthropogenic climate change. B. Farmers will be able to utilize more land, resulting in a decrease in the number of floods. C. Less oxygen will be used by the trees, so more oxygen will be in the atmosphere for humans and other animals to use. D. The regulating services of the area, such as nutrient cycling and water regulation, would increase with fewer trees in the landscape.

A. More carbon dioxide will be added to the atmosphere and increase anthropogenic climate change.

Sustainable use of forests in the United States would likely be encouraged by A. cutting small groups of medium- and large- sized trees in uneven-aged forests B. clear-cutting old-growth forests to allow for secondary succession C. allowing road building in wilderness areas so that older, clear-cut forests have time to regenerate D. logging on steep slopes in designated wilderness areas E. enforcing all provisions of the Resource Conservation and Recovery Act (RCRA)

A. cutting small groups of medium- and large- sized trees in uneven-aged forests

Which of the following is a commercially used method for harvesting trees and is most likely to lead to a fragmented landscape with serious impacts on biodiversity? A. Selective cutting B. Clear-cutting C. Shelter-wood cutting D. Slash and burn clearing E. Gleaning

B. Clear-cutting

Which of the following changes to the local hydrologic cycle will result if large areas of land experienced clear-cutting? A. Transpiration of water from vegetation will increase. B. Evaporation of water from the soil will increase. C. Runoff from watersheds will decrease. D. Siltation of local streams will decrease.

B. Evaporation of water from the soil will increase.

Which of the following statements best describes the most unsustainable method of clear-cutting forests to harvest timber? A. All but the healthiest trees are removed from a forest. B. The highest-value trees are selectively removed from a forest. C. All of the shade-intolerant trees in a small section of a forest are cut down. D. All of the trees in a forest are cut down and removed in one operation.

D. All of the trees in a forest are cut down and removed in one operation.

What can help minimize the threat of infestations in an ecologically sustainable manner?

IPM Techniques

Lumber

When you shape the trees in anyway

Sustainable forestry

refers to a collection of methods that attempt to mitigate the human impact of harvesting trees using forest resources.

What can Prescribed burns do for a forest?

they can improve forest health and are an important sustainable forest technique