气候变化领域集成服务门户(CCPortal): Pre-commercial thinning enhances competitive traits of boreal ericaceous shrubs and reduces soil fertility

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DOI	10.1016/j.foreco.2019.117801
	Pre-commercial thinning enhances competitive traits of boreal ericaceous shrubs and reduces soil fertility
	Reicis K.; Bradley R.L.; Joanisse G.; Houle D.; Tremblay S.; Barrette M.; Wotherspoon A.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	Boreal ericaceous shrubs, such as Kalmia angustifolia, have evolved various traits allowing them to interfere with the growth of conifer trees. These include the ability to spread through rhizomatous growth and to produce high amounts of tannins that interfere with soil N cycling. We examined how pre-commercial thinning (PCT) of young black spruce (Picea mariana) stands, a common silvicultural practice, increases the aboveground and belowground spread of various ericaceous shrubs, the chemical quality of leaves and litter, as well as soil nitrogen cycling. We compared these effects in relatively cool-moist and relatively warm-dry climates. Within the warm-dry climate, we also compared the effects of PCT on fertile clay and on nutrient-poor till deposits. The total cover of ericaceous shrubs was higher in PCT than in control plots in all three site types. On nutrient poor till deposits (in both climates), the current-year rhizome length and specific rhizome mass of K. angustifolia were higher in PCT than in control plots. Soil mineralizable NH4 +-N was lower under patches of K. angustifolia than under patches of feather moss (Pleurozium schreberi). Across all 24 plots, canopy openness had a positive relationship with ericaceous shrub cover, current-year rhizome length, foliar tannins and phenolic concentrations. Although PCT might increase tree growth in the short-term, its positive effects on ericaceous shrubs increases the risk of conifer seedling growth check when the next clearcut harvest occurs, especially in cool moist climates and on nutrient poor soil deposits. © 2019 Elsevier B.V.
关键词	Clay deposits Deposits Flavonoids Nutrients Soils Tannins Black spruce Climate Parent materials Pre-commercial thinning Rhizomes Forestry boreal forest coniferous forest leaf parent material rhizome secondary metabolite shrub soil fertility thinning Control Systems Deposits Growth Leaves Shrubs Soil Thinning Trees Bryophyta Coniferophyta Kalmia angustifolia Picea mariana Pleurozium schreberi
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/133091
推荐引用方式 GB/T 7714	Reicis K.,Bradley R.L.,Joanisse G.,et al. Pre-commercial thinning enhances competitive traits of boreal ericaceous shrubs and reduces soil fertility[J]. Forest Ecology and Management,2020,458.
APA	Reicis K..,Bradley R.L..,Joanisse G..,Houle D..,Tremblay S..,...&Wotherspoon A..(2020).Pre-commercial thinning enhances competitive traits of boreal ericaceous shrubs and reduces soil fertility.,458.
MLA	Reicis K.,et al."Pre-commercial thinning enhances competitive traits of boreal ericaceous shrubs and reduces soil fertility".458(2020).