March 18, 2015, 18:45 London, Mar 18 (Prensa Latina) Amazon jungle, about 550 million hectares, is losing its ability to absorb carbon dioxide (CO2) from the air dioxide, said a study published today in the journal Nature.
Over the past two decades, scientists suggest, trees the largest rainforest on the planet die at an increasing rate, to weaken its role as a sink for CO2, which plants absorb during photosynthesis.
After more than 30 years Research on nearly two thousand trees in the area, they found that they grow faster but also die sooner.
Globally, forests absorb up to 2.4 billion metric tons of carbon each year, and the Amazon rainforest absorbs a quarter of the total.
To Roel Brienen, forest ecologist at the University of Leeds, UK, and colleagues, a possible reason for the increased mortality tree is a paradoxical effect of increased CO2 concentration in the air, which usually encourages tree growth.
“The trees in the forest are growing faster, but faster growth makes trees die younger, “says Brienen.
According to the expert, the fastest growing trees tend to invest less energy in defenses against disease and produce a less dense wood. . So may be more susceptible to disease
These forest reports highlight the unpredictability of the effects of climate change and global warming
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