DOI: 10.1111/ele.13676
论文题名: Fire frequency, state change and hysteresis in tallgrass prairie
作者: Collins S.L. ; Nippert J.B. ; Blair J.M. ; Briggs J.M. ; Blackmore P. ; Ratajczak Z.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期: 4 起始页码: 636
结束页码: 647
语种: 英语
中文关键词: Alternative stable states
; prescribed fire
; regime shift
; resilience
; woody encroachment
英文关键词: ecosystem
; fire
; grassland
; Poaceae
; Ecosystem
; Fires
; Grassland
; Poaceae
英文摘要: Hysteresis is a fundamental characteristic of alternative stable state theory, yet evidence of hysteresis is rare. In mesic grasslands, fire frequency regulates transition from grass- to shrub-dominated system states. It is uncertain, however, if increasing fire frequency can reverse shrub expansion, or if grass-shrub dynamics exhibit hysteresis. We implemented annual burning in two infrequently burned grasslands and ceased burning in two grasslands burned annually. With annual fires, grassland composition converged on that of long-term annually burned vegetation due to rapid recovery of grass cover, although shrubs persisted. When annual burning ceased, shrub cover increased, but community composition did not converge with a long-term infrequently burned reference site because of stochastic and lagged dispersal by shrubs, reflecting hysteresis. Our results demonstrated that annual burning can slow, but not reverse, shrub encroachment. In addition, reversing fire frequencies resulted in hysteresis because vegetation trajectories from grassland to shrubland differed from those of shrubland to grassland. © 2020 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166802
Appears in Collections: 气候变化与战略
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作者单位: Department of Biology, University of New Mexico, Albuquerque, NM 87131, United States; Division of Biology, Kansas State University, Manhattan, KS 66506, United States
Recommended Citation:
Collins S.L.,Nippert J.B.,Blair J.M.,et al. Fire frequency, state change and hysteresis in tallgrass prairie[J]. Ecology Letters,2021-01-01,24(4)