DOI: 10.1111/gcb.14568
Scopus记录号: 2-s2.0-85062343536
论文题名: Four decades of plant community change along a continental gradient of warming
作者: Becker-Scarpitta A. ; Vissault S. ; Vellend M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
语种: 英语
英文关键词: biodiversity
; climate changes
; community ecology
; forest
; historical ecology
; legacy data
; long-term monitoring
; plant community
; resurvey
; understory vegetation
英文摘要: Many studies of individual sites have revealed biotic changes consistent with climate warming (e.g., upward elevational distribution shifts), but our understanding of the tremendous variation among studies in the magnitude of such biotic changes is minimal. In this study, we resurveyed forest vegetation plots 40 years after the initial surveys in three protected areas along a west-to-east gradient of increasingly steep recent warming trends in eastern Canada (Québec). Consistent with the hypothesis that climate warming has been an important driver of vegetation change, we found an increasing magnitude of changes in species richness and composition from west to east among the three parks. For the two mountainous parks, we found no significant changes in elevational species’ distributions in the easternmost park (raw mean = +11.4 m at Forillon Park) where warming has been minimal, and significant upward distribution shifts in the centrally located park (+38.9 m at Mont-Mégantic), where the recent warming trend has been marked. Community Temperature Indices (CTI), reflecting the average affinities of locally co-occurring species to temperature conditions across their geographic ranges (“Species Temperature Indices”), did not change over time as predicted. However, close examination of the underpinnings of CTI values suggested a high sensitivity to uncertainty in individual species’ temperature indices, and so a potentially limited responsiveness to warming. Overall, by testing a priori predictions concerning variation among parks in the direction and magnitude of vegetation changes, we have provided stronger evidence for a link between climate warming and biotic responses than otherwise possible and provided a potential explanation for large variation among studies in warming-related biotic changes. © 2019 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117537
Appears in Collections: 气候变化与战略
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Recommended Citation:
Becker-Scarpitta A.,Vissault S.,Vellend M.. Four decades of plant community change along a continental gradient of warming[J]. Global Change Biology,2019-01-01