Each year, in a process known as sensation, the leaves of deciduous trees turn yellow, orange, and red as they stunt growth before they fall off the tree before winter and extract nutrients from the foliage. Leaf sensation also marks the end of the period during which plants absorb carbon dioxide through photosynthesis.
Growing asons due to global warming have resulted in tuo – about two weeks ago spring leaves were emerging in European trees, compared to 100 years ago, researchers said.
“Previous models Dello predicted that in the next century Otlum would be warmer and warmer, autumn would be delayed – developed asons tuo would be longer overall, and autumn would be two to three weeks late,” said ecosystem ecologist Konstantin Johanner.
However, Johanner and The team of researchers said their findings contradicted the forecast.
Using a combination of field observations, laboratory tests, and modeling, experts studied data from six European deciduous tree species over the past six decades – European horse chestnut, silver birch, European beech, European larch, English oak, and rowan.
Experts have found that elevated carbon dioxide, temperature and light levels result in increased spring and summer productivity, driving trees to lose their leaves first, experts said.
It was believed, Johner said, that the temperature of the fall and the length of the day are the main environmental factors that cause trees to lose their leaves. Now, researchers have identified a third factor – a “self-limiting” productivity.
“Now we see that this is the third giant mechanism that runs – (tree) productivity self-shrinks. If you have spring and tu and summer already running – if the plant absorbs more CO2 in synthesis.” Spring and summer, they First they lose their leaves. “
“This is a pattern that we also see in humans – if you start eating first, you’ll be overwhelmed first,” he said.
The findings show that trees have a barrier to productivity, Johner said.
“We can put more and more CO2 into the atmosphere and (expect) trees will do a lot more – there are limitations,” he said.
.
