Deforestation in America - amazonia.fiocruz.br

Deforestation in America - mine very

February 4, Lots of us are feeling pretty anxious about the destruction of the natural world. It turns out, humans aren't the only ones stressing out—by analyzing hormones that accumulate in fur, researchers found that rodents and marsupials living in smaller patches of South America's Atlantic Forest are under more stress than ones living in more intact forests. The Atlantic Forest is often overshadowed by its neighbor the Amazon, but it's South America's second-largest forest, extending from northeastern Brazil down south along the Brazilian coastline, into northwestern Argentina to eastern Paraguay. It once covered about , square miles, an area bigger than California, Oregon, Washington, and Nevada put together. Since the arrival of Portuguese colonists years ago, parts of the forest have been destroyed to make way for farmland and urban areas; today, less than one-third of the original forest remains. The destruction of an animal's habitat can drastically change its life. There's less food and territory to go around, and the animal might find itself in more frequent contact with predators or in increased competition with other animals for resources. These circumstances can add up to long-term stress. Stress isn't a bad thing in and of itself—in small doses, stress can be life-saving.

Opinion: Deforestation in America

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Deforestation in America	5 days ago · To study the effects of this deforestation, the researchers trapped mammals from areas ranging from 2 to 1, hectares—the size of a city block to square miles. 20 hours ago · Ricardo Galvão, a physicist who lost his position as director of a Brazilian science agency after defending its data on deforestation in the Amazon rainforest, will receive the Scientific Freedom and Responsibility Award from the American . 4 days ago · Deforestation is stressing mammals out researchers found that rodents and marsupials living in smaller patches of South America's Atlantic Forest are under more stress than ones living in .
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Deforestation in America	20 hours ago · Ricardo Galvão, a physicist who lost his position as director of a Brazilian science agency after defending its data on deforestation in the Amazon rainforest, will receive the Scientific Freedom and Responsibility Award from the American . Positives and Negatives of deforestation - Essay and speech. 4 days ago · Deforestation is stressing mammals out researchers found that rodents and marsupials living in smaller patches of South America's Atlantic Forest are under more stress than ones living in .

Deforestation in America

Lots of us are feeling pretty anxious about the destruction of the natural world. It turns out, humans aren't the only ones stressing out -- by analyzing hormones that accumulate in Amwrica, researchers found that rodents and marsupials living in smaller patches of South America's Atlantic Forest are Deforestation in America more stress than ones living in more intact forests.

WHO WE ARE

The Atlantic Forest is often overshadowed by its neighbor the Amazon, but it's South America's second-largest forest, extending from northeastern Brazil down south along the Brazilian coastline, into northwestern Argentina to eastern Paraguay. It once covered aboutsquare miles, an area bigger than California, Oregon, Washington, and Nevada put together. Since the arrival of Portuguese colonists years ago, parts of the forest have been destroyed to make way for farmland and urban areas; today, less than one-third of the original forest remains. The destruction of an animal's habitat Deforestation in America drastically change its life. There's less food and territory to go around, and the animal might find itself in more frequent contact with predators or in increased competition with other animals for resources.

WHAT WE DO

These circumstances can add up to long-term stress. Stress isn't a bad thing in and of itself -- in small doses, stress can be life-saving. It allows you to survive. For this study, the researchers focused on patches of forest in eastern Paraguay, which has been particularly hard hit in Deforestation in America last century as the region was clear-cut for firewood, cattle farming, and soy.

To study the effects of this deforestation, the researchers trapped mammals from areas ranging from 2 to 1, hectares -- the size of a city block to 4. The critters they analyzed included five species of rodents and two Deforestation in America of marsupials. The researchers took samples Devorestation the animals' fur, since hormones accumulate in hair over periods of many days or weeks, and could present a clearer picture of the animals' typical stress levels than the hormones present in a blood sample.

Since glucocorticoid stress hormones get deposited into the fur over time, if you analyze these samples you can look at a longer term measure of their stress. Back in the lab, the researchers ground the fur into a fine powder and extracted the hormones.

They analyzed hormone levels using enzyme immunoassay:"You use antibodies that bind these hormones to figure out how many are there," says Kabelik. The team found that the animals from smaller patches of forest had higher levels of glucocorticoid stress hormones than animals from go here patches of forest. The Deforestation in America also found that the methods of trapping the animals contributed to the amount of stress hormones present. The study not only sheds light on how animals respond to deforestation, but it could also lead to a better understanding of the circumstances in which animals can pass diseases to humans. And, the researchers Deforestation in America, the results of this study go far beyond South America's Atlantic Forest.

Therefore, this has potential to impact the largest variety of ni organisms on the planet, as more and more deforestation is happening.

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We're gonna see individuals and populations that tend to show higher levels of stress. Materials provided by Field Museum. Note: Content may be edited for style and length.]