DOI: 10.1016/j.foreco.2016.10.018
Scopus记录号: 2-s2.0-84992449456
论文题名: A little disturbance goes a long way: 33-year understory successional responses to a thin tephra deposit
作者: Fischer D.G. ; Antos J.A. ; Grandy W.G. ; Zobel D.B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 382 起始页码: 236
结束页码: 243
语种: 英语
英文关键词: Disturbance
; Mount St. Helens
; Old-growth forests
; Recovery
; Succession
; Tephra
; Understory
Scopus关键词: Deposition
; Deposits
; Recovery
; Soils
; Volcanoes
; Disturbance
; Mount St. Helens
; Old-growth forest
; Succession
; Tephra
; Understory
; Forestry
; environmental disturbance
; forest soil
; long-term change
; old-growth forest
; plant community
; regrowth
; relative abundance
; species richness
; succession
; tephra
; understory
; volcanic eruption
; Cascade Range
; Mount Saint Helens
; United States
; Washington [United States]
英文摘要: Large volcanic eruptions can alter forest plant communities through a variety of mechanisms, including direct destruction of forests and changes to forest soils through tephra (aerially transported volcanic ejecta) deposits. While many studies have examined succession following direct destruction of forests, impacts to plant communities through tephra effects are less obvious, especially where the tephra depth is less than plant height. We used a 33-year experiment in an old growth forest that received shallow tephra deposition in the 1980 eruption of Mount St. Helens (WA, USA), to examine plant communities. We determined if community differences between plots with and without tephra: (1) were detectable, and (2) changed over time. We found that plant communities differed significantly between plots with and without tephra after 33 years. Further, differences were stronger after 33 years than at two years following the eruption. Species richness increased over time in both plots with and without tephra, but live cover was largely stable after two years. Nevertheless, communities shifted in different directions over time, where the changes in species composition and abundance immediately following tephra deposition were inconsistent with net changes that occurred over 30 years afterwards. These results suggest that widespread and apparently minor deposits of tephra, usually interpreted to be of transient importance if any, may induce long-term modifications of understory plant communities. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64647
Appears in Collections: 影响、适应和脆弱性
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作者单位: Evergreen Ecosystem Ecology Laboratory, The Evergreen State College, Olympia, WA, United States; Department of Biology, University of Victoria, Victoria, British Columbia, Canada; Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Fischer D.G.,Antos J.A.,Grandy W.G.,et al. A little disturbance goes a long way: 33-year understory successional responses to a thin tephra deposit[J]. Forest Ecology and Management,2016-01-01,382