| DOI: | 10.1016/j.foreco.2016.07.046
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| Scopus记录号: | 2-s2.0-84988036817
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| 论文题名: | Potential of forest thinning to mitigate drought stress: A meta-analysis |
| 作者: | Sohn J.A.; Saha S.; Bauhus J.
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| 刊名: | Forest Ecology and Management
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| ISSN: | 0378-1127
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| 出版年: | 2016
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| 卷: | 380 | | 起始页码: | 261
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| 结束页码: | 273
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| 语种: | 英语
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| 英文关键词: | Radial growth
; Resilience
; Stable carbon and oxygen isotopes
; Stand density
; Water potential
; Water stress
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| Scopus关键词: | Agronomy
; Forestry
; Isotopes
; Plants (botany)
; Recovery
; Regression analysis
; Soil moisture
; Radial growth
; Resilience
; Stable carbon
; Stand densities
; Water potential
; Water stress
; Drought
; aridity
; broad-leaved forest
; carbon isotope
; coniferous forest
; drought resistance
; drought stress
; ecosystem resilience
; growth rate
; growth response
; meta-analysis
; oxygen isotope
; silviculture
; soil water
; soil water potential
; stable isotope
; stand structure
; thinning
; tree ring
; water availability
; water stress
; water use efficiency
; Coniferophyta
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| 英文摘要: | Increasing frequency of extremely dry and hot summers in some regions emphasise the need for silvicultural approaches to increase the drought tolerance of existing forests in the short term, before long-term adaptation through species changes may be possible. The aim of this meta-analysis was to assess the potential of thinning for improving tree performance during and after drought. We used results from 23 experiments that employed different thinning intensities including an unthinned control and focused on the response variables: radial growth, carbon- and oxygen-isotopes in tree-rings and pre-dawn leaf-water potential. We found that thinning effects on the growth response to drought differed between broadleaves and conifers, although these findings are based on few studies only in broadleaved forests. Thinning helped to mitigate growth reductions during drought in broadleaves, most likely via increases of soil water availability. In contrast, in conifers, comparable drought-related growth reductions and increases of water-use efficiency were observed in all treatments but thinning improved the post-drought recovery and resilience of radial growth. Results of meta-regression analysis indicate that benefits of both moderate and heavy thinning for growth performance following drought (recovery and resilience) decrease with time since the last intervention. Further, growth resistance during drought became smaller with stand age while the rate of growth recovery following drought increased over time irrespective of treatment. Heavy but not moderate thinning helped to avoid an age-related decline in medium-term growth resilience to drought. For both closed and very open stands, growth performance during drought improved with increasing site aridity but for the same stands growth recovery and resilience following drought was reduced with increasing site aridity. This synthesis of experiments from a wide geographical range has demonstrated that thinning, in particular heavy thinning, is a suitable approach to improve the growth response of remaining trees to drought in both conifers and broadleaves but the underlying processes differ and need to be considered. © 2016 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/64690
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Chair of Silviculture, University of Freiburg, D-79085 Freiburg, Germany
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| Recommended Citation: | |
Sohn J.A.,Saha S.,Bauhus J.. Potential of forest thinning to mitigate drought stress: A meta-analysis[J]. Forest Ecology and Management,2016-01-01,380
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