环境科学
稀释
固碳
碳纤维
林地
气候变化
桉树
温室气体
植被(病理学)
减缓气候变化
规定烧伤
农林复合经营
碳储量
环境保护
林业
地理
二氧化碳
生态学
复合材料
材料科学
病理
复合数
生物
医学
作者
David M. J. S. Bowman,Grant J. Williamson,Owen Price,Mercy N. Ndalila,Ross A. Bradstock
摘要
Abstract Over the Austral spring and summer of 2019/20 > 7 million ha of Eucalyptus forest and woodland, including some of Australia's most carbon dense ecosystems, were burnt on the east coast of Australia. We estimated bootstrapped mean CO 2 emissions of c. 0.67 Pg, with other available estimates ranging from 0.55 to 0.85 Pg. Eucalyptus forests are renowned for their ability to resist and recover from wildfire so it would be expected that emitted CO 2 will be reabsorbed. The combination of drought and frequent fires is likely reducing the capacity to recover from the fire so future Australian forests may store less carbon. Broadscale prescribed burning is a widely promoted approach to reduce uncontrolled wildfires, yet the benefits for the management of carbon stores are controversial. Prescribed burning can reduce carbon losses from subsequent wildfire, yet the “carbon costs” of it may equal or outweigh the “carbon benefits” in reduced wildfire emissions. Likewise, mechanical thinning of vegetation to reduce fuel loads also carries heavy carbon costs with uncertain carbon benefits. Research involving empirical measurements, modelling and a mix of large‐scale management intervention is urgently required to determine what interventions can maximise carbon storage in the face of climate change‐driven fires.
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