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Scientists warned that extreme heat from climate change has led to a decrease in tropical population populations to 38% to 38%.
The first type of analysis published in the journal Nature Ecology and Evolution used the observations and models to determine the effect of climate change on bird population around the world.
Compared to the world without global warming, he found that the intensification of extreme thermal phenomena led to a decrease in population populations by 25-38% from 1950 to 2020.
This is a “shocking reduction”, according to leader Maximilian Kots, an invited researcher from the climate research institute for climate (PIK) and the center of the Barcelona center of the Barcelona Center (BSC).
Almost every area reported a decrease, but the greatest reduction in the number Birds observed in tropical areas.
Extreme heat can explain the decrease in birds in untouched forests
Tropical areas, such as Amazon Or Panama saw how bird populations fall vertically even in untouched tropical forests. The previous study showed that in the “relatively untouched” part of the tropical forest of the Amazon, the number of birds was reduced by more than 50% from 2003 to 2022.
Such reductions were observed in the forests in Panama, but the causes of both were unknown.
The results of this study show that the most intense extreme temperatures will probably become the main factor in the disappearance of these populations. The reduction of the population in both tropical areas was the same in size with the assessments of the research group in the influence of the growing extreme heat.
According to the study, tropical birds are currently exposed to ten times more conditions Extreme heat than 40 years ago, which on average increased from three days.
“Birds are especially sensitive to dehydration and heat stress,” Kotz explains.
“Extreme heat leads to excessive mortality, a decrease in fertility, reproductive behavior and a decrease in the survival of offspring.”
Coit adds that an increase in temperatures pushes out species from areas where they usually adapt in a very short time.
The first in a performance study
It was still difficult to understand how climate change affects biodiversity compared to the most direct human consequences, such as deletion.
But the emerging scientific field, known as Climate performanceUses a set of standard methods to calculate the exact effect of climate change on various parts of the climatic system. It was used to calculate how much or very extreme weather in the hot world or even the influence of climate change on specific episodes of extremal ice loss through glaciers.
This research group believes that this is the first time when it is used to attribute the loss of biodiversity with climate change.
Their methods show that in tropical areas of lower latitude, the intensification of extreme thermal phenomena already has a greater impact on a decrease in bird populations than deforestation or habitat loss.
“From the side of the conservation, this work tells us that in addition to the protected areas and stopping forests of forests, we must urgently consider strategies for species that are more vulnerable to extreme heat phenomena in order to maximize their adaptability potential,” says Tatsuya Amano.
“This may mean ex -Situ to preserve tasks – that is, to work with some populations in other places.”