| DOI: | 10.1016/j.foreco.2016.06.020
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| Scopus记录号: | 2-s2.0-84974577958
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| 论文题名: | Mixture reduces climate sensitivity of Douglas-fir stem growth |
| 作者: | Thurm E.A.; Uhl E.; Pretzsch H.
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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: | 376 | | 起始页码: | 205
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| 结束页码: | 220
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| 语种: | 英语
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| 英文关键词: | Drought stress
; European beech
; Growth recovery time
; Overyielding
; Resistance
; Stabilization
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| Scopus关键词: | Bacteriology
; Climate change
; Drought
; Electric resistance
; Forestry
; Mixtures
; Recovery
; Stabilization
; Drought stress
; Ecological gradients
; European beech
; Growth recovery
; Long-term growth response
; Mixed-species stands
; Overyielding
; Spatial differentiation
; Ecology
; climate change
; coniferous tree
; deciduous tree
; drought stress
; growth response
; hypothesis testing
; shoot growth
; silviculture
; stabilization
; stem
; stress resistance
; tree ring
; yield
; Europe
; Coniferophyta
; Fagus sylvatica
; Pseudotsuga
; Pseudotsuga menziesii
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| 英文摘要: | Due to possible positive and compensatory interaction between species, mixed stands are a commonly accepted silvicultural response to reduce risks arising from climate change. Nonetheless, only a few species combinations have been studied more detailed so far revealing variable mixing effects. Here, we analyze the effect of the mixture of Douglas fir and European beech with regard to the species-specific climate sensitivity of growth. We focus on three hypotheses: (i) Species-specific long term growing performance and climate sensitivity do not differ between monocultures and mixed stands, (ii) species-specific growth reactions to severe drought events do not differ between monocultures and mixed species stands and (iii) species-specific growth reactions on severe drought events are not influenced by differing ecological growing conditions.To scrutinize the hypothesis we analyzed tree cores from both species taken from pure and mixed stands covering different site conditions and age classes. Tree ring characteristics were used to analyze the differences in climate related long-term growth responses in pure and mixed stands. Short-term responses were investigated by growth reaction indices on individual tree and stand level involving drought events during the years 1950-2010. Linear mixed models were applied to detect effects of ecological co-variables on the indices.Results reveal that Douglas-fir in mixed stands exhibit a significant improved growing performance compared to pure stands. European beech seems to react indifferently concerning its performance in mixture compared to pure stands.Differences in drought stress resistance and growth recovery time mainly arose between the species. Douglas-fir showed a significantly lower resistance and required more time to reach again its initial growth level compared to European beech. In mixture we found a trend that Douglas-fir growth recovery time is shortened and extended for European beech.The analysis along the ecological gradients showed that base-limited soils systems are more drought-tolerant during drought events. Lower basal area as a proxy for reduced stand competition decreased the relative growth loss by drought.We hypothesize that mainly spatial differentiation in height trigger enhanced diameter growth of Douglas-fir in mixture. Temporal differentiation expressed by deferred phenology attenuates climate sensitivity of this conifer. We conclude that in mixed Douglas-fir and European beech stands the former species is stabilized against climatic impacts. On the contrary, climate sensitivity of European beech is increased. © 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/64798
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Chair for Forest Growth and Yield Science, Technische Universität München, Hans-Carl-von-Carlowitz-Platz 2, Freising, Germany
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| Recommended Citation: | |
Thurm E.A.,Uhl E.,Pretzsch H.. Mixture reduces climate sensitivity of Douglas-fir stem growth[J]. Forest Ecology and Management,2016-01-01,376
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