Navigation Links
Amazon rainforest greens up in the dry season

The Amazon rainforest puts on its biggest growth spurt during the dry season, according to new research. The finding surprised the researchers.

"Most of the vegetation around the world follows a general pattern in which plants get green and lush during the rainy season and then during the dry season, leaves fall because there's not enough water in the soil to support plant growth," said lead researcher Alfredo R. Huete of The University of Arizona in Tucson.

"What we found for a large section of the Amazon is the opposite. As soon as the rains stop and you start to enter a dry period, the Amazon becomes alive. New leaves spring out, there's a flush of green growth and the greening continues as the dry season progresses."

The finding holds true only for the undisturbed portion of the rainforest. Areas where the primary forest has been converted to other uses or disturbed, "brown down" in the dry season, said Huete, a UA professor of soil, water and environmental science.

Huete suggests the deep roots of trees in the undisturbed forest can reach water even in the dry season, allowing the trees to flourish during the sunnier, drier part of the year. In contrast, plants in areas that have been logged or converted to other uses cannot reach deep water in the dry season and therefore either go dormant or die.

Figuring out the metabolism of the Amazon rainforest, the largest old-growth rainforest on the planet, is crucial for understanding how rainforests and other tropical biomes function and how deforestation affects biodiversity and sustainable land use in the tropics. It will also help scientists better understand the global carbon cycle, which affects the natural sequestration and release of carbon dioxide, a major greenhouse gas.

The finding that converted forests grow differently from undisturbed forests has implications for understanding fire regimes in the tropics, including the fires that sometimes rage in tropical a
'"/>

Source:University of Arizona


Page: 1 2 3

Related biology news :

1. Amazon symposium to address large-scale conservation
2. Amazon source of 5-year-old river breath
3. Assessing the Amazon Rivers sensitivity to deforestation
4. Woods Hole Research Center plans controlled burn in Amazon rainforest
5. Ants, not evil spirits, create devils gardens in the Amazon rainforest, study finds
6. NASA satellite data provides rapid analysis of Amazon deforestation
7. Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests
8. Amazon trees much older than assumed, raising questions on global climate impact of region
9. Why the Amazon rainforest is so rich in species
10. Satellites show Amazon parks, indigenous reserves stop forest clearing
11. Amazonian terra preta can transform poor soil into fertile
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Amazon rainforest greens the dry season

(Date:9/30/2014)... and farm runoff in Hawaii is causing tumors in ... The study, published Tuesday in the peer-reviewed open-access journal ... ends up in algae that the turtles eat, promoting ... and internal organs. , Scientists at Duke University, the ... Administration (NOAA) conducted the study to better understand the ...
(Date:9/30/2014)... . , Animals ... such as exposure to predators. Researchers from the Max ... study on different populations of great tits that risk-taking ... High metabolic rates and low temperatures were associated with ... more likely to approach potential predators. , The readiness ...
(Date:9/29/2014)... ramosum , coupled with a high-fat diet, may cause animals ... mBio , the online open-access journal of the American ... German Institute of Human Nutrition Potsdam-Rehbruecke in Nuthetal observed that ... gained weight when fed a high-fat diet. Mice that did ... when consuming a high-fat diet, and mice that had ...
Breaking Biology News(10 mins):Pollution linked to lethal sea turtle tumors 2Pollution linked to lethal sea turtle tumors 3Risky metabolism 2Gut bacteria promote obesity in mice 2
... and use of commercial fertilisers and animal waste is ... our aquatic environment. Yet global food and bioenergy supplies ... Agriculture and Ecology at LIFE Faculty of Life ... massive resources at the development of sustainable animal waste ...
... a popular species of game fish in Lake Erie are ... most comprehensive to date on mercury levels in Great Lakes ... a semi-monthly journal. Satyendra Bhavsar and colleagues note ... lakes in the world. The lakes are of significant economic ...
... 20, 2010) -- The Howard Hughes Medical Institute (HHMI) ... Rice University,s successful undergraduate global health program Beyond Traditional ... million HHMI grant in 2006, challenges students to come ... developing world. The program has captured the imagination of ...
Cached Biology News:Massive resources now directed at sustainable animal waste technology 2HHMI renews grant for Rice's global health program 2
(Date:10/1/2014)... 2014 Award winning unified communications ... four new-hosted collaboration bundles that combine next generation ... conferencing experiences for low, flat rate fees. ... businesses have optimized solutions to meet their technology ... audio only minutes (1K, 5K, 10K increments) or ...
(Date:10/1/2014)... The U.S. Department of Labor has awarded ... as part of the Trade Adjustment Assistance Community College ... by the Department of Labor and Department of Education. ... E. Perez and Secretary of Education Arne Duncan announced ... to nearly 270 colleges across the country. , ...
(Date:9/30/2014)... German . , ... in a semiconductor layer. Quantum dots are small structures that ... a short laser pulse is fired at the photonic crystal, ... a change in the electromagnetic field around it. This change ... by the dot. As soon as the refractive index recovers ...
(Date:9/30/2014)... Mass. Using a bio-mimicking analog of one ... grass, an international research team led by Alejandro ... taken a major step in developing long-sought polymer ... electricity for use in electronic devices. , ... Amherst and others at Stanford University and Dresden ...
Breaking Biology Technology:SoundConnect Launches New Audio, Web and Video Bundles 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4Ultrafast remote switching of light emission 2Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3
... Berbee Information Networks Corporation , a privately held IT firm, ... an undisclosed sum. , ,Berbee said it expects to keep ... about 630 employees in all. Strategies & Solutions provides hardware, ... of business servers. , ,Berbee has regional offices throughout the ...
... during the 1990s, healthcare again faces the vexing ... in premiums and out-of-pocket costs for consumers ... time now clinical information technology has been seen ... millions of dollars in clinical systems such as ...
... , a business-process IT firm active in supply-chain software, says ... products for manufacturers. , ,RFID involves putting radio tags on ... Wal-Mart, for one, made sweeping mandates that its suppliers begin ... gave them an extension until the end of next 2006 ...
Cached Biology Technology:Innovative health care takes more than just IT automation 2Innovative health care takes more than just IT automation 3Innovative health care takes more than just IT automation 4
Sigmas E-TOXATE (Limulus Amebocyte Lysate) test kits are intended for the detection and semiquantitation,of endotoxins for research purposes....
... These versatile enclosures ... with nitrogen or other ... a low-humidity environment. HEPA ... and ionization modules also ...
... Low-noise, low-vibration filter/fan unit provides continuous vertical ... Class 100 (ISO 5) cleanliness standards ... to clean and disinfect , ... open to allow insertion of filling machines ...
... testing at various temperatures, this chamber ... a clean heating unit to maintain ... 140F. Transparent panels allow full visibility, ... access to the work area. Includes ...
Biology Products: