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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.14947
|2 doi
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|a pubmed24n1013.xml
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|a (DE-627)NLM304014966
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|a (NLM)31799729
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Lange, Jelena
|e verfasserin
|4 aut
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| 245 |
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|a Moisture-driven shift in the climate sensitivity of white spruce xylem anatomical traits is coupled to large-scale oscillation patterns across northern treeline in northwest North America
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 19.03.2020
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|a Date Revised 19.03.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2019 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
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|a Tree growth at northern treelines is generally temperature-limited due to cold and short growing seasons. However, temperature-induced drought stress was repeatedly reported for certain regions of the boreal forest in northwestern North America, provoked by a significant increase in temperature and possibly reinforced by a regime shift of the pacific decadal oscillation (PDO). The aim of this study is to better understand physiological growth reactions of white spruce, a dominant species of the North American boreal forest, to PDO regime shifts using quantitative wood anatomy and traditional tree-ring width (TRW) analysis. We investigated white spruce growth at latitudinal treeline across a >1,000 km gradient in northwestern North America. Functionally important xylem anatomical traits (lumen area, cell-wall thickness, cell number) and TRW were correlated with the drought-sensitive standardized precipitation-evapotranspiration index of the growing season. Correlations were computed separately for complete phases of the PDO in the 20th century, representing alternating warm/dry (1925-1946), cool/wet (1947-1976) and again warm/dry (1977-1998) climate regimes. Xylem anatomical traits revealed water-limiting conditions in both warm/dry PDO regimes, while no or spatially contrasting associations were found for the cool/wet regime, indicating a moisture-driven shift in growth-limiting factors between PDO periods. TRW reflected only the last shift of 1976/1977, suggesting different climate thresholds and a higher sensitivity to moisture availability of xylem anatomical traits compared to TRW. This high sensitivity of xylem anatomical traits permits to identify first signs of moisture-driven growth in treeline white spruce at an early stage, suggesting quantitative wood anatomy being a powerful tool to study climate change effects in the northwestern North American treeline ecotone. Projected temperature increase might challenge growth performance of white spruce as a key component of the North American boreal forest biome in the future, when drier conditions are likely to occur with higher frequency and intensity
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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4 |
|a Picea glauca
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| 650 |
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|a boreal forest
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| 650 |
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|a climate change
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| 650 |
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|a divergence
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| 650 |
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|a drought
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| 650 |
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|a pacific decadal oscillation
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| 650 |
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4 |
|a plasticity
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| 650 |
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|a tree-ring width
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| 650 |
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4 |
|a wood anatomy
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| 700 |
1 |
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|a Carrer, Marco
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pisaric, Michael F J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Porter, Trevor J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Seo, Jeong-Wook
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Trouillier, Mario
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wilmking, Martin
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Global change biology
|d 1999
|g 26(2020), 3 vom: 17. März, Seite 1842-1856
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
1 |
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|g volume:26
|g year:2020
|g number:3
|g day:17
|g month:03
|g pages:1842-1856
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|u http://dx.doi.org/10.1111/gcb.14947
|3 Volltext
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|d 26
|j 2020
|e 3
|b 17
|c 03
|h 1842-1856
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