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DOI	10.1016/j.foreco.2020.118607
	Light availability predicts mortality probability of conifer saplings in Swiss mountain forests better than radial growth and tree size
	Bianchi E.; Bugmann H.; Bigler C.
发表日期	2021
ISSN	0378-1127
卷号	479
英文摘要	Radial and height growth rates are suitable indicators of impending tree mortality risk of adult trees, but their applicability to saplings remains unknown. We compared radial growth of living and dead saplings of different heights and quantified the effects of light availability, growth and tree size on mortality. We sampled an equal number of living and dead saplings of four coniferous tree species (Pinus cembra, Larix decidua, Picea abies, Abies alba) in nine forests along an elevational gradient of the Swiss Alps. Based on tree-ring widths reconstructed from stem disks at multiple tree heights, we calculated radial growth rates. We observed a divergent pattern in radial growth of living and dead saplings, with reduced growth of dead saplings starting several years prior to death. By matching living and dead saplings of similar ages, we tested whether mortality probabilities of saplings were influenced by light availability, recent growth rates and diameter. Mortality of coniferous saplings in mountain forests was mainly influenced by light availability, with changing effects along the elevational gradient. Recent radial growth rate and tree size were only weakly associated with sapling mortality. Our study establishes the importance of long-term predisposing factors for the mortality probability of conifer saplings in mountain forests, thus extending well-established findings from the adult stage to saplings, which represent a critical stage of forest dynamics. © 2020 The Authors
英文关键词	Early life stage; Forest dynamics; Hemispherical photography; Light availability; Reduced tree growth; Tree-ring width
语种	英语
scopus关键词	Landforms; Population statistics; Probability; Coniferous trees; Different heights; Elevational gradients; Forest dynamics; Light availability; Mountain forests; Predisposing factors; Tree-ring width; Forestry; coniferous forest; coniferous tree; growth; growth rate; light availability; montane forest; mortality; mortality risk; sapling; Forestry; Forests; Growth Rate; Light; Mortality; Probability; Saplings; Trees; Alps; Switzerland; Abies alba; Coniferales; Coniferophyta; Larix decidua; Picea abies; Pinus cembra
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154879
作者单位	Forest Ecology, Institute of Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zurich, Universitätstrasse 16, Zurich, CH-8092, Switzerland
推荐引用方式 GB/T 7714	Bianchi E.,Bugmann H.,Bigler C.. Light availability predicts mortality probability of conifer saplings in Swiss mountain forests better than radial growth and tree size[J],2021,479.
APA	Bianchi E.,Bugmann H.,&Bigler C..(2021).Light availability predicts mortality probability of conifer saplings in Swiss mountain forests better than radial growth and tree size.Forest Ecology and Management,479.
MLA	Bianchi E.,et al."Light availability predicts mortality probability of conifer saplings in Swiss mountain forests better than radial growth and tree size".Forest Ecology and Management 479(2021).