DOI: 10.1111/gcb.14120
Scopus记录号: 2-s2.0-85044977032
论文题名: Quantifying climate–growth relationships at the stand level in a mature mixed-species conifer forest
作者: Teets A. ; Fraver S. ; Weiskittel A.R. ; Hollinger D.Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3587
结束页码: 3602
语种: 英语
英文关键词: biomass increment
; canopy position
; climate change
; dendrochronology
; forest carbon cycle
; Howland Forest
; tree growth response
Scopus关键词: biomass
; canopy
; carbon cycle
; climate change
; climate variation
; coniferous forest
; dendrochronology
; environmental factor
; growth rate
; tree
; Howland Forest
; Maine
; United States
; Coniferophyta
英文摘要: A range of environmental factors regulate tree growth; however, climate is generally thought to most strongly influence year-to-year variability in growth. Numerous dendrochronological (tree-ring) studies have identified climate factors that influence year-to-year variability in growth for given tree species and location. However, traditional dendrochronology methods have limitations that prevent them from adequately assessing stand-level (as opposed to species-level) growth. We argue that stand-level growth analyses provide a more meaningful assessment of forest response to climate fluctuations, as well as the management options that may be employed to sustain forest productivity. Working in a mature, mixed-species stand at the Howland Research Forest of central Maine, USA, we used two alternatives to traditional dendrochronological analyses by (1) selecting trees for coring using a stratified (by size and species), random sampling method that ensures a representative sample of the stand, and (2) converting ring widths to biomass increments, which once summed, produced a representation of stand-level growth, while maintaining species identities or canopy position if needed. We then tested the relative influence of seasonal climate variables on year-to-year variability in the biomass increment using generalized least squares regression, while accounting for temporal autocorrelation. Our results indicate that stand-level growth responded most strongly to previous summer and current spring climate variables, resulting from a combination of individualistic climate responses occurring at the species- and canopy-position level. Our climate models were better fit to stand-level biomass increment than to species-level or canopy-position summaries. The relative growth responses (i.e., percent change) predicted from the most influential climate variables indicate stand-level growth varies less from to year-to-year than species-level or canopy-position growth responses. By assessing stand-level growth response to climate, we provide an alternative perspective on climate–growth relationships of forests, improving our understanding of forest growth dynamics under a fluctuating climate. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110316
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: School of Forest Resources, University of Maine, Orono, ME, United States; Northern Research Station, USDA Forest Service, Durham, NH, United States
Recommended Citation:
Teets A.,Fraver S.,Weiskittel A.R.,et al. Quantifying climate–growth relationships at the stand level in a mature mixed-species conifer forest[J]. Global Change Biology,2018-01-01,24(8)