DOI: 10.1111/gcb.13952
Scopus记录号: 2-s2.0-85042161103
论文题名: Differential declines in Alaskan boreal forest vitality related to climate and competition
作者: Trugman A.T. ; Medvigy D. ; Anderegg W.R.L. ; Pacala S.W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 3 起始页码: 1097
结束页码: 1107
语种: 英语
英文关键词: Alaska
; boreal forest
; climate change
; drought
; forest inventory
; growth decline
; insect-induced mortality
; terrestrial carbon cycle
; vapor pressure deficit
Scopus关键词: Hexapoda
; Magnoliophyta
英文摘要: Rapid warming and changes in water availability at high latitudes alter resource abundance, tree competition, and disturbance regimes. While these changes are expected to disrupt the functioning of boreal forests, their ultimate implications for forest composition are uncertain. In particular, recent site-level studies of the Alaskan boreal forest have reported both increases and decreases in productivity over the past few decades. Here, we test the idea that variations in Alaskan forest growth and mortality rates are contingent on species composition. Using forest inventory measurements and climate data from plots located throughout interior and south-central Alaska, we show significant growth and mortality responses associated with competition, midsummer vapor pressure deficit, and increased growing season length. The governing climate and competition processes differed substantially across species. Surprisingly, the most dramatic climate response occurred in the drought tolerant angiosperm species, trembling aspen, and linked high midsummer vapor pressure deficits to decreased growth and increased insect-related mortality. Given that species composition in the Alaskan and western Canadian boreal forests is projected to shift toward early-successional angiosperm species due to fire regime, these results underscore the potential for a reduction in boreal productivity stemming from increases in midsummer evaporative demand. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110504
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Biology, University of Utah, Salt Lake City, UT, United States; Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States
Recommended Citation:
Trugman A.T.,Medvigy D.,Anderegg W.R.L.,et al. Differential declines in Alaskan boreal forest vitality related to climate and competition[J]. Global Change Biology,2018-01-01,24(3)