干旱区生态环境知识资源中心(Arid): Root carbon and soil temperature may be key drivers of below-ground biomass in grassland following prescribed fires in autumn and spring

Arid

DOI	10.1016/j.jenvman.2023.119337
	Root carbon and soil temperature may be key drivers of below-ground biomass in grassland following prescribed fires in autumn and spring
	Luo, Chaoyi; Fang, Zhao; Liu, Jiang; Han, Fengpeng; Wu, Yanhong; Bing, Haijian; Zhao, Peng
通讯作者	Wu, YH
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2024
卷号	349
英文摘要	Under global warming, fire and the season in which the fire occurs both have important impacts on grassland plant biomass. Still, the effect of fire on below-ground biomass (BB) along a natural aridity gradient and the main impact factors remain unclear. Here, we conducted a fire manipulation experiment (including un-fired, autumn fire and spring fire treatments) to investigate the effects of prescribed fire on BB and its critical determinants along a transect of grassland in northern China. BB had different response strategies in different aridity regions and fire seasons, despite above-ground biomass (AB) and root-shoot ratio were not significantly affected by fire. General linear regression models revealed that the fire changed the trend of increasing BB to decreasing along increasing aridity (p < 0.05). Random forest model (RFM) and partial correlations revealed that the BB was primarily influenced by aridity, followed by the nitrogen (N) and phosphorus (P) concentration ratio of AB under un-fired disturbance. For autumn fire, the BB was primarily influenced by below-ground biomass carbon con-centration (BB c), followed by the C and N concentration ratio of BB. For spring fire, the BB was primarily influenced by soil temperature (ST), followed by aridity and soil total phosphorus concentration (Soil p). Furthermore, partial least squares path model (PLS-PM) revealed that autumn fires weakened the effects of environmental factors on BB, while spring fires enhanced the effects of soil nutrients on BB. These suggested that fire disrupted the original stable nutrient dynamics of BB. Our results suggested that fire promoted the growth of BB in relatively humid areas (aridity = 0.51-0.53) while inhibited the growth of BB in relatively arid areas (aridity = 0.68-0.74). BB c and ST may be key drivers of BB after prescribed fire in autumn and spring.
英文关键词	Prescribed fire Aridity Soil nutrient Plant nutrient Below-ground biomass
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001112519500001
WOS关键词	RAIN-USE EFFICIENCY ; NITROGEN DEPOSITION ; STOICHIOMETRY ; PLANTS ; PRECIPITATION ; AVAILABILITY ; PRODUCTIVITY ; DISTURBANCE ; TOPOGRAPHY ; MECHANISMS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404440
推荐引用方式 GB/T 7714	Luo, Chaoyi,Fang, Zhao,Liu, Jiang,et al. Root carbon and soil temperature may be key drivers of below-ground biomass in grassland following prescribed fires in autumn and spring[J],2024,349.
APA	Luo, Chaoyi.,Fang, Zhao.,Liu, Jiang.,Han, Fengpeng.,Wu, Yanhong.,...&Zhao, Peng.(2024).Root carbon and soil temperature may be key drivers of below-ground biomass in grassland following prescribed fires in autumn and spring.JOURNAL OF ENVIRONMENTAL MANAGEMENT,349.
MLA	Luo, Chaoyi,et al."Root carbon and soil temperature may be key drivers of below-ground biomass in grassland following prescribed fires in autumn and spring".JOURNAL OF ENVIRONMENTAL MANAGEMENT 349(2024).