气候变化领域集成服务门户(CCPortal): Assessing the effects of thinning on stem growth allocation of individual Scots pine trees

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DOI	10.1016/j.foreco.2020.118344
	Assessing the effects of thinning on stem growth allocation of individual Scots pine trees
	Saarinen N.; Kankare V.; Yrttimaa T.; Viljanen N.; Honkavaara E.; Holopainen M.; Hyyppä J.; Huuskonen S.; Hynynen J.; Vastaranta M.
发表日期	2020
ISSN	0378-1127
卷号	474
英文摘要	Forest management alters the growing conditions and thus further development of trees. However, quantitative assessment of forest management on tree growth has been demanding as methodologies for capturing changes comprehensively in space and time have been lacking. Terrestrial laser scanning (TLS) has shown to be capable of providing three-dimensional (3D) tree stem reconstructions required for revealing differences between stem shapes and sizes. In this study, we used 3D reconstructions of tree stems from TLS and an unmanned aerial vehicle (UAV) to investigate how varying thinning treatments and the following growth effects affected stem shape and size of Scots pine (Pinus sylvestris L.) trees. The results showed that intensive thinning resulted in more stem volume and therefore total biomass allocation and carbon uptake compared to the moderate thinning. Relationship between tree height and diameter at breast height (i.e. slenderness) varied between both thinning intensity and type (i.e. from below and above) indicating differing response to thinning and allocation of stem growth of Scots pine trees. Furthermore, intensive thinning, especially from below, produced less variation in relative stem attributes characterizing stem shape and size. Thus, it can be concluded that thinning intensity, type, and the following growth effects have an impact on post-thinning stem shape and size of Scots pine trees. Our study presented detailed measurements on post-thinning stem growth of Scots pines that have been laborious or impracticable before the emergence of detailed 3D technologies. Moreover, the stem reconstructions from TLS and UAV provided variety of attributes characterizing stem shape and size that have not traditionally been feasible to obtain. The study demonstrated that detailed 3D technologies, such as TLS and UAV, provide information that can be used to generate new knowledge for supporting forest management and silviculture as well as improving ecological understanding of boreal forests.1 © 2020 The Author(s)
关键词	Antennas Ecology Image reconstruction Mechanical variables measurement Plants (botany)Seebeck effect Surveying instruments Unmanned aerial vehicles (UAV)Diameter-at-breast heights Effects of thinning Growing conditions Quantitative assessments Terrestrial laser scanning Thinning intensity Thinning treatment Threedimensional (3-d)Forestry biomass allocation boreal forest forest management growth morphology pine stem thinning unmanned vehicle Ecology Forestry Growth Pinus Sylvestris Shape Thinning Trees Pinus sylvestris
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/132671
推荐引用方式 GB/T 7714	Saarinen N.,Kankare V.,Yrttimaa T.,et al. Assessing the effects of thinning on stem growth allocation of individual Scots pine trees[J]. Forest Ecology and Management,2020,474.
APA	Saarinen N..,Kankare V..,Yrttimaa T..,Viljanen N..,Honkavaara E..,...&Vastaranta M..(2020).Assessing the effects of thinning on stem growth allocation of individual Scots pine trees.,474.
MLA	Saarinen N.,et al."Assessing the effects of thinning on stem growth allocation of individual Scots pine trees".474(2020).