About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

New Research Predicts That Drought Would Make Amazon More Green

by Venkatraman on September 22, 2007 at 4:27 PM
Font : A-A+

New Research Predicts That Drought Would Make Amazon More Green

Droughts would make the verdant Amazon rainforest even greener, a new study by a team of researchers from the University of Arizona, US, has revealed.

Several climate models have predicted that rising Earth temperatures will cause intense drought in the Amazon basin, eventually leading to the rainforest's collapse into grass-covered savannah, with only a sprinkling of trees.

Advertisement

Now, a new model that takes into account the widespread drought that hit the Amazon in 2005 has shown otherwise.

According to the model, a warming scenario would result in the forest being hit by drought. The trees would then respond by reducing both transpiration (the evaporation of water from parts of a plant, especially the leaves) and photosynthesis.
Advertisement

This reaction would exacerbate the drought by reducing the amount of water entering the atmosphere, which in turn would reduce precipitation.

Lead author Scott Saleska said these responses should be observable as changes in trees' leaf area and the amount of chlorophyll (both measures of the forest's "greenness") in the forest trees by satellite measurements even for short-term droughts.

She said the researchers found that the greenness of the forest had actually increased during the 2005 drought.

The researchers hypothesize this could be because the trees actually had more access to sunlight and could dig their roots deeper down in the soil to access water.

Saleska said, according to her test results, the Amazon won't be as directly vulnerable to drought as the climate models predict, but that it will still be vulnerable to deforestation and forest fires, which can increase during droughts.

The study appears in the Sept. 21 issue of the journal Science, reports LiveScience.

Source: ANI
VEN /J
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
Turmeric: Magic Ingredient to Keep you Healthy in Winter
Top 7 Benefits of Good Oral Hygiene
Healthy and Safer Thanksgiving 2021
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.


Recommended Reading
Climate Change Will Spread Global Disease, Warns Experts
Climate change will have an overwhelmingly negative impact on health with possibly one billion more ...
Role of Climate Change in Siberian Forest Fires Explored
Researchers at the university of Leicester have found that changing climate is contributing to ......

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use