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DOI	10.1016/j.foreco.2018.10.008
	Effects of structural heterogeneity on the diurnal temperature range in temperate forest ecosystems
	Ehbrecht M.; Schall P.; Ammer C.; Fischer M.; Seidel D.
发表日期	2019
ISSN	0378-1127
起始页码	860
结束页码	867
卷号	432
英文摘要	The microclimate in forest ecosystems can be altered by modifications of stand structure due to forest management or natural forest development. Current forest management practices in Central Europe and North America aim to promote structural heterogeneity and maintain forest canopy cover, which is known to be a major driver of forest microclimate. Here, we investigated the impacts of forest management and structural heterogeneity on the diurnal temperature range (DTR) in 128 managed forest stands in three climatically different locations (Swabian Alb, Hainich-Dün and Schorfheide-Chorin) in Central Europe. Increasing structural heterogeneity by promoting tree size diversity and differentiation increased vertical stratification and resulted in an impaired DTR during the vegetation period. Linear regression models with geographic location, elevation above sea level, canopy openness and measures of structural heterogeneity as explanatory variables explained 79.4–80.9% of variance in DTR. However, the overall effect of structural heterogeneity on DTR was small. Differences in DTR between plots of different main tree species could be attributed to differences in canopy openness and light transmission, whereas tree species diversity had no significant effect on DTR. Unmanaged forests were characterized by a significantly lower DTR than managed, even-aged forests. DTR in uneven-aged stands managed under single tree selection was comparable to unmanaged stands. Terrestrial laser scanning (TLS) derived measures of canopy openness and vertical structure allowed to explain 79.4% of variance in DTR considering geographic location and elevation, which can also be assessed by TLS with integrated GPS and an altimeter. We conclude that structural characteristics of forest stands other than canopy openness contribute marginally to variation in forest microclimate. However, the analyses of structure-microclimate analyses indicate that effects of stand structure on DTR might be more pronounced in regions with low precipitation during the vegetation period. © 2018 Elsevier B.V.
英文关键词	Forest management; Forest structure; Microclimate; TLS
语种	英语
scopus关键词	Ecosystems; Light transmission; Location; Regression analysis; Sea level; Seebeck effect; Surveying instruments; Thallium; Vegetation; Diurnal temperature ranges; Forest management practices; Forest structure; Microclimate; Structural characteristics; Structural heterogeneity; Temperate forest ecosystems; Terrestrial laser scanning; Forestry; diurnal variation; forest canopy; forest ecosystem; forest management; GPS; heterogeneity; laser method; microclimate; stand structure; stratification; temperate forest; temperature effect; Ecosystems; Forestry; Plants; Regression Analysis; Thallium; Transmittance; Central Europe; North America
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/156333
作者单位	Silviculture and Forest Ecology of the Temperate Zones, Faculty of Forest Sciences, University of Göttingen, Göttingen, Germany; Institute of Plant Sciences, University of Bern, Bern, Switzerland
推荐引用方式 GB/T 7714	Ehbrecht M.,Schall P.,Ammer C.,et al. Effects of structural heterogeneity on the diurnal temperature range in temperate forest ecosystems[J],2019,432.
APA	Ehbrecht M.,Schall P.,Ammer C.,Fischer M.,&Seidel D..(2019).Effects of structural heterogeneity on the diurnal temperature range in temperate forest ecosystems.Forest Ecology and Management,432.
MLA	Ehbrecht M.,et al."Effects of structural heterogeneity on the diurnal temperature range in temperate forest ecosystems".Forest Ecology and Management 432(2019).