气候变化领域集成服务门户(CCPortal): Release of retained oaks in Norway spruce plantations. A 10-year perspective on oak vitality, spruce wood production and ground vegetation

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DOI	10.1016/j.foreco.2020.118670
	Release of retained oaks in Norway spruce plantations. A 10-year perspective on oak vitality, spruce wood production and ground vegetation
	Delphine L.; Emma H.; Jörg B.; Jan W.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	This study explores the decade-long effects of release cutting around old retained oaks (Quercus robur L.) in a Norway spruce (Picea abies L. Karst) stand that was 33 year old when thinned. The impacts on both nature conservation values and spruce wood production were evaluated in a randomized block design. To release oaks from competition, stems of Norway spruce were cut around 33 oaks, in three different treatments: high release (HR), medium release (MR) and no release (NR). Trees within a circular sample plot (15 m radius from the oak) were measured at time of treatment and 10 years after. The treatment effects on stand development, oak vitality and understory vegetation were evaluated after ten years, using tree diameter, height measurements, oak crown and tree structure estimates as well as ground vegetation surveys. Release cutting did not impact spruce production within the sample plot, and given that there were no other obvious sources of spruce suppression in the stand, we speculate that release cutting has little to no impact at the stand scale. Oak crowns in the control plots (NR) became smaller after ten years, while the crowns expanded and colonized the gap in the release treatments. Simultaneously, the amount of dead wood in the crown increased among oaks in the control treatment, indicating dieback. Cover and species richness of vascular plants in the understory were significantly higher in the HR and MR treatments compared to NR. These results suggest that the creation of relatively wide gaps (greater than 2 m) around retained oak crowns is one efficient approach to maintain their conservation values in a spruce-dominated stand on a longer time frame. This will allow oaks to expand their crowns, increase their vitality and increase species richness and diversity of plants under the canopy. The economic loss of creating large gaps instead of no gaps may be negligible since the overall spruce production was not affected within 15 m of each oak. © 2020 The Authors
英文关键词	Biodiversity; Gap dynamics; Ground vegetation; Legacy tree; Picea abies; Quercus robur; Release cutting; Tree retention
语种	英语
scopus关键词	Conservation; Losses; Vegetation; Wood products; Conservation values; Control treatments; Different treatments; Ground vegetation; Height Measurement; Longer time frames; Species richness and diversities; Understory vegetation; Forestry; Picea abies; Quercus robur; Tracheophyta
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/154823
作者单位	Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Sundsvägen 3, Alnarp, 23053, Sweden; The Forestry Research Institute of Sweden, (Skogforsk), Ekebo 2250, Svalöv, 26890, Sweden; The Forestry Research Institute of Sweden, (Skogforsk), Uppsala, 75183, Sweden
推荐引用方式 GB/T 7714	Delphine L.,Emma H.,Jörg B.,et al. Release of retained oaks in Norway spruce plantations. A 10-year perspective on oak vitality, spruce wood production and ground vegetation[J],2021,480.
APA	Delphine L.,Emma H.,Jörg B.,&Jan W..(2021).Release of retained oaks in Norway spruce plantations. A 10-year perspective on oak vitality, spruce wood production and ground vegetation.Forest Ecology and Management,480.
MLA	Delphine L.,et al."Release of retained oaks in Norway spruce plantations. A 10-year perspective on oak vitality, spruce wood production and ground vegetation".Forest Ecology and Management 480(2021).