气候变化领域集成服务门户(CCPortal): Effects of red alder on growth of Douglas-fir and western redcedar in southwestern British Columbia

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DOI	10.1016/j.foreco.2018.12.023
	Effects of red alder on growth of Douglas-fir and western redcedar in southwestern British Columbia
	Fang C.; Comeau P.G.; Harper G.J.
发表日期	2019
ISSN	0378-1127
起始页码	244
结束页码	254
卷号	434
英文摘要	Red alder (Alnus rubra [Bong.]), is the most common broadleaf species in the Pacific Northwest, and is widely distributed as a component of mixed stands with conifers. It rapidly overtops associated juvenile conifers and is a strong competitor. However, red alder is also a symbiotic nitrogen fixer and can contribute to improvement in soil nitrogen, as well as serving other roles such as improving biodiversity and forest health. We examined data collected in mixed red alder-conifer plantations established between 1992 and 1999 to examine the effects of red alder on the growth of Douglas-fir (Pseudotsuga menziessi (Mirb.) Franco, Fd) and western redcedar (Thuja plicata Donn., Cw). Results suggest that densities of up to 400 alder trees per hectare may be acceptable and possibly desirable on nitrogen deficient sites. The growth of Fd may be enhanced when red alder density is relatively low at older ages. We found that the competitive effects of red alder on conifer growth were consistently lower than that of the conifers (Fd and Cw) while alder had stronger effects on light availability. The relationship between volume growth and competition indices varied between the two conifer species: (1) for Fd the highest correlations were obtained using a distance-dependent competition index based on the height differences, and (2) for Cw the highest correlations were with distance-independent Lorimer's index. As also expected due to Cw's greater shade tolerance, its volume growth showed less sensitivity to the presence of red alder than Fd. © 2018
英文关键词	Competition indices; Douglas-fir; Light; Nitrogen; Red alder; Volume growth; Western redcedar
语种	英语
scopus关键词	Biodiversity; Light; Nitrogen; Competition index; Douglas fir; Red alder; Volume growth; Western redcedar; Forestry; coniferous tree; deciduous tree; growth response; height; interspecific competition; light effect; nitrogen fixation; plantation forestry; shade tolerance; soil nitrogen; stand structure; Alnus Rubra; Biodiversity; Forestry; Light; Nitrogen; Pseudotsuga; British Columbia; Canada; Pacific Northwest; Alnus; Alnus rubra; Coniferophyta; Pseudotsuga; Pseudotsuga menziesii; Thuja plicata
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/156210
作者单位	University of Alberta, Department of Renewable Resources, 751 General Services Building, Edmonton, AB T6G 2H1, Canada; Ministry of Forests, Lands, Natural Resource Operations and Rural Development, 8th Floor – 727 Fisgard St., Victoria, BC V8W 9C2, Canada
推荐引用方式 GB/T 7714	Fang C.,Comeau P.G.,Harper G.J.. Effects of red alder on growth of Douglas-fir and western redcedar in southwestern British Columbia[J],2019,434.
APA	Fang C.,Comeau P.G.,&Harper G.J..(2019).Effects of red alder on growth of Douglas-fir and western redcedar in southwestern British Columbia.Forest Ecology and Management,434.
MLA	Fang C.,et al."Effects of red alder on growth of Douglas-fir and western redcedar in southwestern British Columbia".Forest Ecology and Management 434(2019).