Environmental Science, 10th Edition (Cunningham)

Chapter 12: Biodiversity: Preserving Landscapes

GE Exercise: Amazonian Deforestation

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Overview: Amazonian Deforestation, p. 257

You probably already know that the Amazonian rainforest is the largest and most species-rich tropical forest in the world. With more than 7 million km2 (1.2 billion acres), the Amazon basin contains over half the world's tropical rainforest. You probably also know that the Amazon is rapidly being deforested. Between 1970 and 2000, it's estimated that more than 700,000 km2 (an area twice the size of Portugal) of the Amazon were cleared, by logging companies and by farmers and ranchers looking for new land. There are a number of reasons that settlers are flooding into the Amazon. Part of the story is government policies that favor ranching and grant title to the land to anyone who cuts down the forest and turns it into pasture. Another critical factor is expansion of agriculture in the Cerrado (Savanna) just to the south (see also chapter 9 in textbook). Small subsistence farms are being bought out (either legally or through duress) so that large-scale, industrial farms can increase soy production. These landless farmers move further into the virgin forest in search of homesteads.

Roads provide access for land migrants. Even at very high altitude, you can see the fishbone pattern where deforested patches line lateral roads that branch off from main highways. There have been many clashes between native people, farmers, and ranchers over who owns land in this turbulent and chaotic frontier region. The Landless Workers Movement reports that between 1985 and 2000 more than 1,237 rural workers were killed in clashes with loggers and ranchers. In 2005, Sister Dorothy Stang, an American nun who had been working on development for the rural poor, was murdered. Sister Dorothy, who had been trying to prevent attacks on settlements, frequently reported human rights abuses, and she was teaching locals how to live in the forest sustainably. She was assassinated by pistoleiros (gunmen) hired by a rancher near Anapu, about 350 km east of the place marker.

1
Which direction is the major highway running in this area?
A) North-South
B) East-West
C) North-West
D) South-East
2
The "fishbone" lateral roads are branching of the main highway every ______ km or so, and these lateral roads are roughly ______ km long.
A)1-2, 10-15
B)4-5, 5-10
C)5-10, 4-5
D)4-5, 10-15
E)10-15, 15-20
3
Based on the sizes of the cleared patches off the lateral roads, is it likely that large or small landowners made the clearings?
A)The clearings are large, indicating that large landowners made them.
B)The clearings are large patchworks of small openings, indicating that small landholders or landless peasants cleared them.
C)The clearings are small, indicating that small landholders or landless peasants cleared them.
D)Not enough evidence is available to determine whether the cleared patches were made by large or small landowners.
4
What role does the establishment of the lateral "fishbone" roads play in the problem of deforestation, if any?
A)The lateral roads allow for initial settlement off the main highway, followed by small openings made by the small landowners or landless peasants, which eventually converge into expansive, open areas that were once forest.
B)The lateral roads don't play any role in deforestation; they are simply roads that connect different areas.
C)The lateral roads don't play any role in deforestation because they are built after the forest has been cleared.
5
What is the huge river that runs east-west about 180 km north of the place marker?
A)The Nile
B)The Serengeti
C)The Mississippi
D)The Tigris-Euphrates
E)The Amazon
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