干旱区生态环境知识资源中心(Arid): Carbon stocks and stability are diminished by short-interval wildfires in fire-tolerant eucalypt forests

Arid

DOI	10.1016/j.foreco.2021.119919
	Carbon stocks and stability are diminished by short-interval wildfires in fire-tolerant eucalypt forests
	Fairman, Thomas A.; Nitschke, Craig R.; Bennett, Lauren T.
通讯作者	Fairman, TA (corresponding author)，Univ Melbourne, Sch Ecosyst & Forest Sci, 500 Yarra Blvd, Burnley, Vic 3121, Australia.
来源期刊	FOREST ECOLOGY AND MANAGEMENT
ISSN	0378-1127
EISSN	1872-7042
出版年	2022
卷号	505
英文摘要	Forests play a key role in mitigating global climate change through carbon storage and sequestration. Wildfire affects forest carbon through combustion and by influencing forest mortality and regrowth, which are also influenced by a forest's growth environment. Wildfires are becoming more severe and frequent in many temperate regions but the impacts of such changes-in association with projected warmer, drier climates-on forest carbon stocks, remains under-quantified in many temperate biomes. We compare the impacts of a single high-severity wildfire and two high-severity wildfires within a short interval (six years) on carbon stocks 2-3 years after the last wildfire in multiple carbon pools of fire-tolerant eucalypt forests in temperate, south-eastern Australia. These forests are assumed to contain relatively resistant carbon stores because the dominant eucalypts are rarely killed by fire, reliably resprouting after most fires. Mean carbon stocks in the principal aboveground pools were decreased by one, and particularly two, high-severity wildfires after controlling for site aridity, which was negatively related to aboveground carbon stocks. On average, the percentage of aboveground carbon stocks in live biomass decreased from 76% at Unburned sites to 62% at Single-burned and 47% at Double-burned sites, contributing to increases in standing deadwood carbon stocks from 11% at Unburned sites to 42% at Double burned sites. As such, the proportion of carbon in large, living trees (an indicator of carbon stability and carbon-recovery capacity) was decreased after short-interval wildfires. Soil carbon stocks to 10-cm depth were also significantly reduced at all wildfire sites (likely due to erosion), which could also delay post-fire recovery of productivity. Overall, our findings indicate that both single and short-interval wildfires can significantly reduce the amount of carbon stored in fire-tolerant eucalypt forests, and that the potential for carbon-stock recovery could be compromised by predicted warmer and drier (i.e., more arid) future climates, and by soil feedbacks to productivity. Actively managing carbon stocks in fire-tolerant eucalypt forests could be required in the coming decades to mitigate these risks.
英文关键词	Eucalypt Fire regime Forest carbon Frequent fire Interval squeeze Wildfire frequency Wildfire
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000745188800002
WOS关键词	REPEATED PRESCRIBED FIRES ; CLIMATE-CHANGE ; PYROGENIC CARBON ; EASTERN AUSTRALIA ; ECOSYSTEM CARBON ; BOREAL FORESTS ; TEMPERATE ; SOIL ; REGIMES ; MANAGEMENT
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376930
作者单位	[Fairman, Thomas A.; Nitschke, Craig R.] Univ Melbourne, Sch Ecosyst & Forest Sci, 500 Yarra Blvd, Burnley, Vic 3121, Australia; [Bennett, Lauren T.] Univ Melbourne, Sch Ecosyst & Forest Sci, 4 Water St, Creswick, Vic 3363, Australia
推荐引用方式 GB/T 7714	Fairman, Thomas A.,Nitschke, Craig R.,Bennett, Lauren T.. Carbon stocks and stability are diminished by short-interval wildfires in fire-tolerant eucalypt forests[J],2022,505.
APA	Fairman, Thomas A.,Nitschke, Craig R.,&Bennett, Lauren T..(2022).Carbon stocks and stability are diminished by short-interval wildfires in fire-tolerant eucalypt forests.FOREST ECOLOGY AND MANAGEMENT,505.
MLA	Fairman, Thomas A.,et al."Carbon stocks and stability are diminished by short-interval wildfires in fire-tolerant eucalypt forests".FOREST ECOLOGY AND MANAGEMENT 505(2022).