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DOI	10.1016/j.foreco.2019.117688
	Regeneration gap and microsite niche partitioning in a high alpine forest: Are Norway spruce seedlings more drought-tolerant than beech seedlings?
	Diaci J.; Rozman J.; Rozman A.
发表日期	2020
ISSN	0378-1127
卷号	455
英文摘要	Mixed mountain forests composed of Picea abies, Abies alba and Fagus sylvatica represent one of the most important alpine ecosystems with respect to economics, environmental effects and social functions. However, many stands are characterised by even-aged forest structure and altered tree species composition, making them more prone to disturbances and less effective in protection against natural hazards. Changes to the forest microclimate and nutrient cycling delay natural regeneration and favour the successional development of ground vegetation. In this study we hypothesized that the creation of gaps of appropriate size and shape would facilitate natural regeneration and forest conversion. In 2003, we selected 15 gaps, ranging in size from 0.01 to 0.62 ha and more than 50 years in age, and three areas below closed canopy on a south facing P. abies dominated mixed mountain forest (1380–1480 m a.s.l.). Within the gaps we established 542 systematically distributed research plots (1.5 × 1.5 m) and analysed regeneration attributes according to height classes, ground vegetation coverage, light climate, topsoil moisture, microsite relief and soil features. Measurements were repeated after five vegetation seasons and indicated minimal changes in vegetation structure and the slow development of regeneration overall. Vegetation ordination and generalized linear mixed models showed a positive association of P. abies seedling abundance with diffuse light, thickness of the organic horizons, presence of CWD and moss coverage and a negative association with ground vegetation cover, soil water content, Landolt indication value for nutrients and direct light. Fagus sylvatica seedlings were more abundant closer to seed trees, on less acidic soils with higher moisture content and on concave microrelief. The results indicate that P. abies and F. sylvatica seedlings may successfully establish under slightly open forest canopies, but in a few years the former require amounts of diffuse light comparable with that in the medium sized gaps in this study (0.15 ha). Due to the negative association between direct light and regeneration, gaps should be elliptical with the long axis oriented east-west. Recruitment of all species was significantly retarded by overbrowsing. © 2019 Elsevier B.V.
关键词	Economic and social effects Nutrients Soil moisture Vegetation Gap partitioning Ground vegetation Micro-relief Microsite Overbrowsing Reforestation alpine environment browsing coniferous forest deciduous forest drought resistance gap dynamics microrelief mixed forest niche partitioning regeneration seedling soil moisture stand structure succession topsoil vegetation structure Abies alba Bryophyta Fagus Fagus sylvatica Picea abies
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133174
推荐引用方式 GB/T 7714	Diaci J.,Rozman J.,Rozman A.. Regeneration gap and microsite niche partitioning in a high alpine forest: Are Norway spruce seedlings more drought-tolerant than beech seedlings?[J]. Forest Ecology and Management,2020,455.
APA	Diaci J.,Rozman J.,&Rozman A..(2020).Regeneration gap and microsite niche partitioning in a high alpine forest: Are Norway spruce seedlings more drought-tolerant than beech seedlings?.,455.
MLA	Diaci J.,et al."Regeneration gap and microsite niche partitioning in a high alpine forest: Are Norway spruce seedlings more drought-tolerant than beech seedlings?".455(2020).