Unit 6- Lesson 3: Forestry

Identify the six consequences of deforestation.

- Climate change on a regional level might result if there is massive deforestation. - Runoff containing eroded soil and contaminants enters streams and pollutes aquatic ecosystems. - Carbon dioxide in the atmosphere increases. - Some species might become extinct with the loss of their habitat. - Soil fertility decreases. - Exposed soil without the roots of the trees anchoring it is more prone to flooding.

Complete the table in order. Ecological Services

1- cycle nutrients 2- store water 3- purify water and air 4- influence climate 5- store water 6- provide habitat

Describe the three different ways forests can be logged. 1- clear cutting 2- selective cutting 3- strip cutting

1- is when loggers remove all the trees. 2- leaves middle-aged to mature trees or only cuts a few mature trees. 3- removes all the trees in a narrow strip of forest.

Complete the table in order. Economic Services

1- wood for fuel 2- lumber 3- pulp for paper 4- livestock grazing 5- recreation 6- employment

According to the USDA, how many trees are cut down each year to make paper?

20 million

How many sheets of paper can be made from a tree that is 50 centimeters in diameter and 25 meters tall? Make the same assumptions as the example problem in the Lesson. Show your work and round your answer to 3 significant figures.

242,000 sheets of paper

Approximately ____% of earth is covered by forests.

30%

Why is selective cutting a better way to log?

Selective cutting can allow for different-aged trees to exist in the same area, which helps better preserve habitats for different animals that live in different-aged trees.

Which type of logging is most destructive to the environment?

clear cutting

Define the term secondary forest.

forest that develops after the original forest has been disturbed in some way

Define the term native forest.

forest that has been cut, replanted, and managed

Define the term primary forest.

forest that has been uncut or undisturbed by humans for 200 years or more

Define the term virgin forest.

forest that has never been cut

Are forests a renewable or nonrenewable resource?

renewable

Define the term silviculture.

the management of commercial forests (those where timber is harvested for profit)

Define the term deforestation.

the temporary or permanent removal of forests for human use

Over _____ people depend on wood for both heating their homes and cooking.

two billion

Define the term tree plantation.

where trees are planted in nice, neat rows and harvested like other crops

What are three ways to "log better"?

- Reduce clear cutting and stop clear cutting on steep slopes where erosion effects are much greater. - Stop logging old-growth forests. -Use selective cutting and strip cutting.

Select the three different ways forests can be logged.

- clear cutting - strip cutting - selective cutting

____out of ____ people depend on a forest in order to make a living.

1 out of 4