DOI: 10.1111/gcb.13045
论文题名: Forest tree growth response to hydroclimate variability in the southern Appalachians
作者: Elliott K.J. ; Miniat C.F. ; Pederson N. ; Laseter S.H.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 12 起始页码: 4627
结束页码: 4641
语种: 英语
英文关键词: Diffuse-porous
; Hydroclimate
; Productivity
; Radial growth
; Ring-porous
; Small storms
; Structural equation modeling
; Tree-rings
Scopus关键词: climate change
; deciduous tree
; forest ecosystem
; growth response
; soil moisture
; storm
; tree ring
; Appalachians
; Acer
; Betula
; Liriodendron
; Quercus
; anatomy and histology
; climate
; climate change
; forest
; growth, development and aging
; North Carolina
; season
; tree
; xylem
; Climate
; Climate Change
; Forests
; North Carolina
; Seasons
; Trees
; Xylem
英文摘要: Climate change will affect tree species growth and distribution; however, under the same climatic conditions species may differ in their response according to site conditions. We evaluated the climate-driven patterns of growth for six dominant deciduous tree species in the southern Appalachians. We categorized species into two functional groups based on their stomatal regulation and xylem architecture: isohydric, diffuse porous and anisohydric, ring porous. We hypothesized that within the same climatic regime: (i) species-specific differences in growth will be conditional on topographically mediated soil moisture availability; (ii) in extreme drought years, functional groups will have markedly different growth responses; and (iii) multiple hydroclimate variables will have direct and indirect effects on growth for each functional group. We used standardized tree-ring chronologies to examine growth of diffuse-porous (Acer, Liriodendron, and Betula) and ring-porous (Quercus) species vs. on-site climatic data from 1935 to 2003. Quercus species growing on upslope sites had higher basal area increment (BAI) than Quercus species growing on mesic, cove sites; whereas, Acer and Liriodendron had lower BAI on upslope compared to cove sites. Diffuse-porous species were more sensitive to climate than ring porous, especially during extreme drought years. Across functional groups, radial growth was more sensitive to precipitation distribution, such as small storms and dry spell length (DSL), rather than the total amount of precipitation. Based on structural equation modeling, diffuse-porous species on upslope sites were the most sensitive to multiple hydroclimate variables (r2 = 0.46), while ring-porous species on upslope sites were the least sensitive (r2 = 0.32). Spring precipitation, vapor pressure deficit, and summer storms had direct effects on summer AET/P, and summer AET/P, growing season small storms and DSL partially explained growth. Decreasing numbers of small storms and extending the days between rainfall events will result in significant growth reduction, even in regions with relatively high total annual rainfall. © 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/61900
Appears in Collections: 影响、适应和脆弱性
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作者单位: Coweeta Hydrologic Lab, USDA Forest Service, Southern Research Station, Otto, NC, United States; Harvard Forest, Harvard University, Petersham, MA, United States
Recommended Citation:
Elliott K.J.,Miniat C.F.,Pederson N.,et al. Forest tree growth response to hydroclimate variability in the southern Appalachians[J]. Global Change Biology,2015-01-01,21(12)