Steal the light: shade vs fire adapted vegetation in forest-savanna mosaics

	Steal the light: shade vs fire adapted vegetation in forest-savanna mosaics
	Charles-Dominique, Tristan; Midgley, Guy F.; Tomlinson, Kyle W.; Bond, William J.
刊名	NEW PHYTOLOGIST
	2018
卷号	218 期号:4 页码:1419-1429
关键词	Branch Mass Per Area Ecological Threshold Fire Ecology Functional Traits Grassland-forest Mosaics Photosynthetic Pathway Savanna Shade Tolerance
ISSN号	0028-646X
英文摘要	Shade cast by trees, which suppresses grass growth, and fire fuelled by grass biomass, which prevents tree sapling establishment, are mutually exclusive and self-reinforcing drivers of biome distribution in savanna-forest mosaics. We investigated how shade depth, represented by canopy leaf area index (LAI), is generated by adult trees across savanna-forest boundaries and how a shade gradient filters tree functioning, and grass composition and biomass. Forest trees exerted greater shading through increased stem density and greater light interception per unit biomass. A critical transition at LAI c. 1.5 was linked to tree shifts from savanna to forest species, functional shifts from fire-tolerant to light-competitive species, and grass composition shifts from C-4 to C-3 pathways. A second transition to grass fuel loads too low to support fires, occurred at a lower canopy density (LAI > 0.5), accompanied by shifts in C-4 subtype dominance. This pattern suggests that shade suppression of grass biomass is an essential first step for the maintenance of alternative stable states.
学科主题	Plant Sciences
URL标识	查看原文
语种	英语
公开日期	2018-07-31
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10985]
专题	西双版纳热带植物园_其他
推荐引用方式 GB/T 7714	Charles-Dominique, Tristan,Midgley, Guy F.,Tomlinson, Kyle W.,et al. Steal the light: shade vs fire adapted vegetation in forest-savanna mosaics[J]. NEW PHYTOLOGIST,2018,218(4):1419-1429.
APA	Charles-Dominique, Tristan,Midgley, Guy F.,Tomlinson, Kyle W.,&Bond, William J..(2018).Steal the light: shade vs fire adapted vegetation in forest-savanna mosaics.NEW PHYTOLOGIST,218(4),1419-1429.
MLA	Charles-Dominique, Tristan,et al."Steal the light: shade vs fire adapted vegetation in forest-savanna mosaics".NEW PHYTOLOGIST 218.4(2018):1419-1429.