Navigation Links
No-win situation for agricultural expansion in the Amazon
Date:5/10/2013

The large-scale expansion of agriculture in the Amazon through deforestation will be a no-win scenario, according to a new study.

Published today, 10 May, in IOP Publishing's journal Environmental Research Letters, it shows that deforestation will not only reduce the capacity of the Amazon's natural carbon sink, but will also inflict climate feedbacks that will decrease the productivity of pasture and soybeans.

The researchers used model simulations to assess how the agricultural yield of the Amazon would be affected under two different land-use scenarios: a business-as-usual scenario where recent deforestation trends continue and new protected areas are not created; and a governance scenario which assumes Brazilian environmental legislation is implemented.

They predict that by 2050, a decrease in precipitation caused by deforestation in the Amazon will reduce pasture productivity by 30 per cent in the governance scenario and by 34 per cent in the business-as-usual scenario.

Furthermore, increasing temperatures could cause a reduction in soybean yield by 24 per cent in a governance scenario and by 28 per cent under a business-as-usual scenario.

Through a combination of the forest biomass removal itself, and the resulting climate change, which feeds back on the ecosystem productivity, the researchers calculate that biomass on the ground could decline by up to 65 per cent for the period 2041-2060

Brazil faces a huge challenge as pressure mounts to convert forestlands to croplands and cattle pasturelands in the Amazon. A fine balance must be struck, however, as the natural ecosystems sustain food production, maintain water and forest resources, regulate climate and air quality, and ameliorate infectious diseases.

Lead author of the study, Dr Leydimere Oliveira, said: "We were initially interested in quantifying the environmental services provided by the Amazon and their replacement by agricultural output.

"We expected to see some kind of compensation or off put, but it was a surprise to us that high levels of deforestation could be a no-win scenario the loss of environmental services provided by the deforestation may not be offset by an increase in agriculture production."

The researchers, from the Federal University of Viosa, Federal University of Pampa, Federal University of Minas Gerais and the Woods Hole Research Center, show that the effects of deforestation will be felt most in the eastern Par and northern Maranho regions.

Here the local precipitation appears to depend strongly on forests and changes in land cover would drastically affect the local climate, possibly to a point where agriculture becomes unviable.

"There may be a limit for expansion of agriculture in Amazonia. Below this limit, there are not important economic consequences of this expansion. Beyond this limit, the feedbacks that we demonstrated start to introduce significant losses in the agriculture production," continued Dr Oliveira.


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Related biology news :

1. Queens researcher finds situation dire for threatened rhino species
2. Handbook of Agricultural Entomology
3. Powerful enzymes create ethanol from agricultural harvest waste
4. Agricultural, health education goes global via cellphone animations
5. USDA study shows trends in public and private agricultural R&D
6. Study details essential role of trust in agricultural biotech partnerships
7. Agricultural expert outlines path for developing nations to double food production, meet 2050 demand
8. Discovery of plant proteins may boost agricultural yields and biofuel production
9. Agricultural bacteria: Blowing in the wind
10. BiOptix announces expansion of Board of Directors
11. Is bioenergy expansion harmful to wildlife?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2016)... , March 11, 2016 http://www.apimages.com ) ... Cross reference: Picture is available at AP Images ( http://www.apimages.com ) ... DERMALOG will be used to produce the new refugee identity cards. ... biometric innovations, at CeBIT in Hanover next ... from DERMALOG will be used to produce the new refugee identity ...
(Date:3/10/2016)... BELL, Pa. , March 10, 2016   Unisys ... U.S. Customs and Border Protection (CBP) is testing its ... San Diego to help identify certain ... States . The test, designed to help determine the ... pedestrian environment, began in February and will run until May ...
(Date:3/9/2016)... Fla. , March 9, 2016  Crossmatch ... authentication and enrollment solutions, today announced the addition ... ® Altus multi-factor authentication platform. New ... InfoSec managers to step-up security where it,s needed ... Washington, DC . --> ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... Texas , May 3, 2016  Dr. ... plastic surgeon in The Woodlands, Texas ... destroys 24 percent of treated fat cells in just ... woman. Close to 90 percent of Americans report feeling ... options. Nonsurgical fat reduction procedures are a growing industry. ...
(Date:5/2/2016)... ... May 02, 2016 , ... ... in mind, the fresh look and added functionality give the agricultural world a ... seen a dynamic shift in agriculture – from precision farming via satellites and ...
(Date:4/29/2016)... ... April 29, 2016 , ... Proove ... excited to announce the launch of the Proove Health Foundation . The ... education to promote the use of personalized medicine for tackling the nation’s most-pressing ...
(Date:4/29/2016)... Louisville, KY and San Diego, CA (PRWEB) , ... April 29, ... ... the National Stem Cell Foundation (NSCF) to support the development of a patient-specific stem ... by Dr. Andrés Bratt-Leal in the lab of Dr. Jeanne Loring at The Scripps ...
Breaking Biology Technology: