三分之二的热带森林“在未来十年的威胁下”

一项新的研究警告说，[圣保罗]热带森林可以发展对温暖气候的抵抗力，但如果全球平均温度达到两位摄氏两位，则在未来十年内将受到威胁，这将受到威胁。

专家说，如果热带森林进一步退化，依赖森林的社区和全球气候将受到影响。

Led by scientists at the University of Leeds andpublished inScience，该研究涉及来自世界各地的226名研究人员。该队列在南美，非洲，亚洲和澳大利亚的590个永久森林地块中分析了碳库存数据，其中大多数在亚马逊地区。

The Amazon rainforest acts as a huge carbon sink, absorbing and storing carbon dioxide (CO₂) and helping to cool global temperatures. Even under high temperatures, trees remove CO₂— a greenhouse gas that contributes to global warming — from the atmosphere.

但是，如果森林暴露于摄氏32.2摄氏度以上的平均温度，那么储存高水平的碳的能力会大大降低。

Sustainable development in tropical regions will be directly impacted if the biodiversity of tropical forests is altered by rising temperatures and they lose their ability to absorb carbon, says Luiz Aragão, head of the remote sensing division at Brazil’s National Institute for Space Research and a co-author of the study.

“Understanding how climate change impacts carbon absorption in tropical forests can help us identify the most vulnerable areas where biomass loss can interfere with local economies and human development,” he says.

圣保罗大学核能源中心的研究员，圣保罗大学的合着者PlínioBarbosade Camargo一直在监视巴西亚马逊的Santarém的永久地块，已有2beplay下载官网西西软件0年了。他的团队监视着大约20,000棵树的生长，并测量森林的生物质和碳平衡。

“The region we monitor still has the capacity to absorb carbon and recover after prolonged periods of drought,” he says.

“This gives room for different societies to continue investing in the development of products and services from biodiversity.”

But, the resilience potential of forests can only be achieved with proper climate change mitigation and solutions for the conservation and restoration of native vegetation, the researchers say.

“The results suggest that intact forests can withstand heating to some extent,” but for this to happen it is vital that forests remain intact, agronomist and study co-author Simone Aparecida Vieira, from the Centre for Environmental Studies and Research at São Paulo’s University of Campinas (Unicamp), tellsSciDev.Net.

这需要降低森林砍伐率以及与森林清理以及采矿，非法伐木和强化低生产率牲畜种植相关的频繁火灾。

“Understanding how climate change impacts carbon absorption in tropical forests can help us identify the most vulnerable areas where biomass loss can interfere with local economies and human development.”

Luiz Aragão, National Institute for Space Research, Brazil.

Yet, it is unclear whether cooler forests in Asia and Africa will respond to global heating in the same way as those in South America or whether they can adapt in time, says Lara Kueppers, associate professor at the University of California, Berkeley’s energy and resources group, who did not take part in the study.

“I don’t have confidence that forests are going to be able to adjust on the time scale they will need to,” she says in a relatedSciencecommentary.

But, the research offers a good starting point to deepen knowledge about forests’ abilities to adapt to climate change, says biologist Ricardo Ribeiro Rodrigues from the Luiz de Queiroz School of Agriculture at the University of São Paulo, who was not involved in the study.