Thursday , October 21 2021

The Amazon is evolving, but it does not change how fast the climate changes



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November 8 (UPI) – According to a new Amazon survey, the largest planet forest moves its composition in response to climate change.

Unfortunately, the research suggests that the Amazon is not developing fast enough. The climate changes faster than the Amazon can adjust.

Most notably, scientists find that moisture tree species die faster than can be replaced by species that can resist drier conditions. Drought in recent decades has damaged large Amazon pieces.

"The ecosystem response is less than the rate of climate change," said Adriane Esquivel Muelbert, a geologist at Leeds University, in a news release. "The data showed us that the drought that hit the Amazon basin in recent decades has had serious consequences for the composition of the forest, with higher mortality in tree species most exposed to drought and insufficient species growth in damages which has better equipment to survive drier conditions. "

The survey, published this week in the Global Change Biology magazine, also shows that increasing levels of carbon dioxide benefit from canopy species in the upper layer of the forest.

In addition, some smaller tree species benefit from the increase in CO2 and more calm wood moisture and moisture.

Previous studies have predicted that CO2 levels will increase accelerate at least some forest dynamics, allowing beneficial species to increase the rates of photosynthesis and conquest of new territory.

"The increase in some innovative trees, such as the growing rapidly Cecropia, consistent with the changes seen in forest dynamics, which could also be driven by higher levels of carbon dioxide, "said Oliver Phillips, a tropical ecology teacher in Leeds.

Although a change can help the Amazon adapt to changing conditions, rapid shifts can ease destabilize ecosystems.

"The impact of climate change on forest communities has important consequences for the biodiversity of rainforests," said Kyle Dexter, from the University of Edinburgh. "The most serious danger to drought is at risk, as they are typical of those that have limited them to fewer locations in the Amazon center, which make them more likely to have disappeared if this process continues. "

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