DOI: 10.1016/j.foreco.2012.10.036
Scopus记录号: 2-s2.0-84870156114
论文题名: Tree size, stand density, and the source of water used across seasons by ponderosa pine in northern Arizona
作者: Kerhoulas L.P. ; Kolb T.E. ; Koch G.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 289 起始页码: 425
结束页码: 433
语种: 英语
英文关键词: Arizona
; Forest management
; Seasonal precipitation
; Stand density
; Tree size
; Water isotopes
Scopus关键词: Arizona
; Seasonal precipitations
; Stand densities
; Tree size
; Water isotope
; Climate change
; Conservation
; Hydrogen
; Isotopes
; Soil moisture
; Water supply
; Forestry
; climate change
; climate effect
; coniferous tree
; environmental restoration
; forest management
; hydrogen isotope
; isotopic ratio
; plant water relations
; precipitation (climatology)
; semiarid region
; size
; soil water
; stand structure
; Arizona
; Conservation
; Forest Management
; Hydrogen
; Isotopes
; Precipitation
; Seasonal Variation
; Stand Density
; Water Supply
; Arizona
; United States
; Pinus ponderosa
英文摘要: Understanding the dynamic relationships between seasonal water use, stand density, and tree size in semi-arid forests of the southwestern US is important for predicting climate change impacts and for tailoring forest restoration prescriptions to mitigate such impacts. Using hydrogen stable isotope ratio (δD) analyses of precipitation, soil water, and stem water over a 2-year sampling period, we found that winter precipitation was the dominant water source for ponderosa pines (Pinus ponderosa Dougl.) in northern Arizona in all seasons. Soil and stem waters were isotopically more enriched in high- than low-density stands. Isotopic analyses indicated large trees were more reliant on deep soil water than small trees. Our results indicate that management actions that maintain or create low-density stands of large deeply-rooted trees increase tree access to winter precipitation via deep soil storage and thus may help mitigate impacts of climate warming on tree health. Our findings provide new understanding of the complex relationships among seasonal water use, stand density, and tree size in a region where a drying climate puts increasing stress on forests. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66831
Appears in Collections: 影响、适应和脆弱性
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作者单位: Northern Arizona University, Department of Biological Sciences, Merriam-Powell Center for Environmental Research, P.O. Box 5640, Flagstaff, AZ 86011, United States; Northern Arizona University, School of Forestry, P.O. Box 15018, Flagstaff, AZ 86011, United States
Recommended Citation:
Kerhoulas L.P.,Kolb T.E.,Koch G.W.. Tree size, stand density, and the source of water used across seasons by ponderosa pine in northern Arizona[J]. Forest Ecology and Management,2013-01-01,289