DOI: 10.1111/gcb.13046
论文题名: Montane forest ecotones moved downslope in northeastern USA in spite of warming between 1984 and 2011
作者: Foster J.R. ; D'Amato A.W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 12 起始页码: 4497
结束页码: 4507
语种: 英语
英文关键词: Picea rubens
; Climate migration
; Decline
; Disturbance
; Ecotones
; Forest dynamics
; Global change
; Species range shifts
Scopus关键词: boreal forest
; climate change
; coniferous tree
; ecosystem dynamics
; environmental disturbance
; forest ecosystem
; Landsat
; montane forest
; population decline
; satellite imagery
; warning system
; United States
; Picea rubens
; altitude
; climate change
; forest
; New Hampshire
; remote sensing
; space flight
; statistical model
; Vermont
; Altitude
; Climate Change
; Forests
; Logistic Models
; New Hampshire
; Remote Sensing Technology
; Spacecraft
; Vermont
英文摘要: Ecotones are transition zones that form, in forests, where distinct forest types meet across a climatic gradient. In mountains, ecotones are compressed and act as potential harbingers of species shifts that accompany climate change. As the climate warms in New England, USA, high-elevation boreal forests are expected to recede upslope, with northern hardwood species moving up behind. Yet recent empirical studies present conflicting findings on this dynamic, reporting both rapid upward ecotonal shifts and concurrent increases in boreal species within the region. These discrepancies may result from the limited spatial extent of observations. We developed a method to model and map the montane forest ecotone using Landsat imagery to observe change at scales not possible for plot-based studies, covering mountain peaks over 39 000 km2. Our results show that ecotones shifted downward or stayed stable on most mountains between 1991 and 2010, but also shifted upward in some cases (13-15% slopes). On average, upper ecotone boundaries moved down -1.5 m yr-1 in the Green Mountains, VT, and -1.3 m yr-1 in the White Mountains, NH. These changes agree with remeasured forest inventory data from Hubbard Brook Experimental Forest, NH, and suggest that processes of boreal forest recovery from prior red spruce decline, or human land use and disturbance, may swamp out any signal of climate-mediated migration in this ecosystem. This approach represents a powerful framework for evaluating similar ecotonal dynamics in other mountainous regions of the globe. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61689
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Resources, University of Minnesota, 115 Green Hall 1530 Cleveland Ave. N., St. Paul, MN, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, 204E Aiken Center, 81 Carrigan Drive, Burlington, VT, United States
Recommended Citation:
Foster J.R.,D'Amato A.W.. Montane forest ecotones moved downslope in northeastern USA in spite of warming between 1984 and 2011[J]. Global Change Biology,2015-01-01,21(12)