干旱区生态环境知识资源中心(Arid): Alternative stable equilibria and critical thresholds created by fire regimes and plant responses in a fire-prone community

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DOI	10.1111/ecog.03491
	Alternative stable equilibria and critical thresholds created by fire regimes and plant responses in a fire-prone community
	Miller, Adam D.1; Thompson, Jonathan R.3; Tepley, Alan J.1; Anderson-Teixeira, Kristina J.1,2
通讯作者	Miller, Adam D.
来源期刊	ECOGRAPHY
ISSN	0906-7590
EISSN	1600-0587
出版年	2019
卷号	42 期号:1 页码:55-66
英文摘要	Wildfire is a dominant disturbance in many ecosystems, and fire frequency and intensity are being altered as climates change. Through effects on mortality and regeneration, fire affects plant community composition, species richness, and carbon cycling. In some regions, changes to fire regimes could result in critical, non-reversible transitions from forest to non-forested states. For example, the Klamath ecoregion (northwest United States) supports extensive conifer forests that are initially replaced by hardwood chaparral following high-severity fire, but eventually return to conifer forest during the fire-free periods. Climate change alters both the fire regime and post-fire recovery dynamics, potentially causing shrubland to persist as a stable (i.e. self-renewing) vegetation stage, rather than an ephemeral stage. Here, we present a theoretical investigation of how changes in plant traits and fire regimes can alter the stability of communities in forest-shrub systems such as the Klamath. Our model captures the key characteristics of the system, including life-stage-specific responses to disturbance and asymmetrical competitive interactions. We assess vegetation stability via invasion analysis, and conclude that portions of the landscape that are currently forested also can be stable as shrubland. We identify parameter thresholds where community equilibria change from stable to unstable, and show how these thresholds may shift in response to changes in life-history or environmental parameters. For instance, conifer maturation rates are expected to decrease as aridity increases under climate change, and our model shows that this reduction decreases the fire frequencies at which forests become unstable. Increases in fire activity sufficient to destabilize forest communities are likely to occur in more arid future climates. If widespread, this would result in reduced carbon stocks and a positive feedback to climate change. Changes in stability may be altered by management practices.
英文关键词	alternative stable equilibria theoretical modeling disturbance theory
类型	Article
语种	英语
国家	USA ; Panama
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000454810100006
WOS关键词	CLIMATE-CHANGE ; LANDSCAPE DYNAMICS ; POSITIVE FEEDBACKS ; KLAMATH MOUNTAINS ; FOREST ; DISTURBANCE ; COEXISTENCE ; MECHANISMS ; SEVERITY ; SHIFTS
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215119
作者单位	1.Smithsonian Conservat Biol Inst, Conservat Ecol Ctr, Front Royal, VA 22630 USA; 2.Smithsonian Trop Res Inst, Ctr Trop Forest Sci, Forest Global Earth Observ, Panama City, Panama; 3.Harvard Forest, Petersham, MA USA
推荐引用方式 GB/T 7714	Miller, Adam D.,Thompson, Jonathan R.,Tepley, Alan J.,et al. Alternative stable equilibria and critical thresholds created by fire regimes and plant responses in a fire-prone community[J],2019,42(1):55-66.
APA	Miller, Adam D.,Thompson, Jonathan R.,Tepley, Alan J.,&Anderson-Teixeira, Kristina J..(2019).Alternative stable equilibria and critical thresholds created by fire regimes and plant responses in a fire-prone community.ECOGRAPHY,42(1),55-66.
MLA	Miller, Adam D.,et al."Alternative stable equilibria and critical thresholds created by fire regimes and plant responses in a fire-prone community".ECOGRAPHY 42.1(2019):55-66.