|
|
Amazon rain forest continues to fall; 200,000 square miles gone since 1978 Forest loss may worsen as Brazil seeks to expand agricultural production and fires threaten stressed ecosystem Rhett Butler, mongabay.com April 24, 2005
In 2004 at least 8,920 square miles (23,037 sq km) of rainforest were cleared in the Brazilian Amazon. That's almost 25 square miles (63 sq. kilometers) of forest lost per day and over 203,000 square miles (527,000 square kilometers) since 1978. Worse, studies from NASA suggest that these estimates of Amazon deforestation may capture less than half of the area degraded each year by logging and accidental fire. Why is the Amazon still disappearing at these high rates? Today deforestation in the Amazon is the result of several activities, the foremost of which include: clearing for cattle pasture, colonization and subsequent subsistence agriculture, infrastructure improvements, commercial agriculture, and logging. Clearing for Cattle Pasture
Cattle ranching is the leading cause of deforestation in the Brazilian Amazon. This has been the case since at least the 1970s when government figures attributed 38% of deforestation from 1966-1975 to large scale cattle ranching. However, today the situation may be even worse. According to The Center for International Forestry Research (CIFOR), in 2003 80 percet of the growth in Brazilian cattle production was in the Amazon region. Several factors have spurred recent Brazil's growth as a producer of beef:
Colonization and subsequent subsistence agriculture
A significant amount of deforestation is caused by the subsistence activities of poor farmers who are encouraged to settle on forest lands by government land policies. In Brazil, each squatter acquires the right (known as an usufruct right) to continue using a piece of land by living on a plot of unclaimed public land and "using" it for at least one year and a day. After five years the squatter acquires ownership and hence the right to sell the land. Up until at least the mid-1990s this system was worsened by the government policy that allowed each claimant to gain title for an amount of land up to three times the amount of forest cleared. Poor farmers use slash-and-burn techniques for land clearing and every year satellite images pick up tens of thousands of fires burning across the Amazon. Typically understory shrubbery is cleared and then forest trees are cut. The area is left to dry for a few months and then burned. Sometimes the agricultural fires escape into neighboring forest and burn for months during the dry season. The land is planted with crops like bananas, palms, manioc, maize, or rice. After a year or two, the productivity of the soil declines, and the transient farmers press a little deeper and clear new forest for more short-term agricultural land. The old, now infertile fields are left used for small-scale cattle grazing or left as scrubland. Between 1995 and 1998, the government granted land in the Amazon to roughly 150,000 families. 48% of forest loss in 1995 was in areas under 125 acres (50 hectares) in size, suggesting that both loggers and rural poor are significant contributors to deforestation. Infrastructure Improvements
Road construction in the Amazon leads to deforestation. Roads provide access to logging and mining sites while opening forest frontier land to exploitation by poor landless farmers. Brazil's Trans-Amazonian highway was one of the most ambitious economic development programs ever devised, and one of the most spectacular failures. In the 1970s, Brazil planned a 2000-mile highway that would bisect the massive Amazon forest, opening rainforest lands to (1) settlement by poor farmers from the crowded, drought-plagued north and (2) development of its timber and mineral resources. Colonists would be granted a 250-acre lot, six months' salary, and easy access to agricultural loans in exchange for settling along the highway and converting the surrounding rainforest into agricultural land. The plan would grow to cost Brazil US$65,000 (1980 dollars) to settle each family, a staggering amount for Brazil, a developing country at the time and resulted in massive deforestation by inexperienced farmers who didn't understand the ecology of the region. Satellite data in 2004 showed a marked increase in deforestation along the BR-163 road, a highway the government has been paving in an effort to help soy farmers from Mato Grosso get their crops to export markets. Typically, roads encourage settlement by rural poor who look to the rainforest as free land for substistence agriculture. Brazil and Peru have embarked on a similar road project to construct a highway that would link the new agricultural zones of the Amazon to the ports of Peru to feed growing food demand from China. Commercial agriculture Logging
Logging in the Amazon is closely linked with road building. Studies by the Environmental Defense Fund show that areas that have been selectively logged are eight times more likely to be settled and cleared by shifting cultivators than untouched rainforests because of access granted by logging roads. Logging roads give colonists access to rainforest, which they exploit for fuelwood, game, building material, and temporary agricultural lands. Escalation Today Brazil faces an enormous challenge: how to balance economic growth with the preservation of the Amazon rainforest. While the government has recently set aside some land as protected areas in response to the slaying of American nun Dorothy Stang last February, some analysts believe deforestation in the Amazon and surrounding regions will continue to escalate as the country looks to expand its exports, especially to the Far East. It's no secret that some Brazilians envision agricultural production in the Amazon to someday exceed that of the American heartland. Map of Amazon region 
SHARE THIS ARTICLE:
News index | RSS | News Feed | Twitter | Home Advertisements: Organic Apparel from Patagonia | Insect-repelling clothing
|
|
|
MONGABAY.COM
WEEKLY NEWSLETTER INTERACT
T-SHIRTS 
CALENDARS 
CANVAS BAGS 
| | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Cattle in the Amazon
Deforestation, State of Rondônia, Brazil August 1992
|
Copyright mongabay 2009 |
