Scientists have documented a worrying trend in the rainforests of Australia: Tree lifespans have halved in the last 35 years, and it appears to be due to the effects of climate change on the ecosystems.
Scientists have documented a worrying trend in the rainforests of Australia: Tree lifespans have halved in the last 35 years, and it appears to be due to the effects ofWith these forests acting as significant carbon sinks, the consequences for the planet could be devastating, creating a feedback loop that's both caused by global warming and which then contributes to it.
"It was a shock to detect such a marked increase in tree mortality, let alone a trend consistent across the diversity of species and sites we studied,""A sustained doubling of mortality risk would imply the carbon stored in trees returns twice as fast to the atmosphere." Atmospheric water stress driven by global warming is to blame for the increase in tropical tree mortality, the researchers think: The warmer air dries out trees more quickly., another delicately balanced ecosystem that is struggling with higher temperatures.
The new study is particularly valuable because it uses a large pool of data gathered over many years – enabling scientists to cut through the noise of such busy and active ecosystems to spot these long-term trends.
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