气候变化领域集成服务门户(CCPortal): When do dendrometric rules fail? Insights from 20 years of experimental thinnings on sessile oak in the GIS Coop network

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DOI	10.1016/j.foreco.2018.11.007
	When do dendrometric rules fail? Insights from 20 years of experimental thinnings on sessile oak in the GIS Coop network
	Trouvé R.; Bontemps J.-D.; Collet C.; Seynave I.; Lebourgeois F.
发表日期	2019
ISSN	0378-1127
起始页码	276
结束页码	286
卷号	433
英文摘要	Context: Lowering stand density has been suggested to adapt forests to warmer and drier conditions. Whether common dendrometric rules used to guide growth models and support silviculture are still valid at these densities lower than usual needs be tested. This includes (1) estimating the stand growth-density relationship over wider density gradients (‘Langsaeter's rule’), (2) testing the stability of site index, and (3) ‘Eichhorn's rule’ (relating site index to stand growth) at lower densities. Additionally, environmental changes call for a more direct inclusion of environmental drivers in growth models. Material and methods: We investigated the effects of relative stand density (RDI) on stand growth of even-aged stands of sessile oak. We also analyzed effects of climatic conditions to assess whether sessile oak is already at a critical stage that requires adapting forest management. We used a network of silvicultural trials designed to test the effects of maximum density gradients on stand dynamics along climatic gradients. Results: As predicted by Langsaeter's rule, gross stand growth increased with RDI then saturated for RDI > 0.4–0.5, mortality began after crown closure, and diameter increment decreased non-linearly with RDI. Dominant height growth first increased with RDI then saturated for RDI > 0.8. Positive effects of RDI on both stand and height growth caused Eichhorn's rule to be stable over a large range of RDI (0.25–1). Effects of climate predictors were weak and only visible for radial growth indices. They however suggested antagonistic effects of water and temperature constraints in summer and autumn. Discussion: Langsaeter's and Eichhorn's rules were found valid over a large range of RDI values. We suggest using them to guide growth models and management. However, assumptions behind the use of site index as a proxy for stand productivity were invalidated. Weak and opposed effect of temperature in summer and autumn makes the outcome of climate warming on sessile oak growth uncertain. © 2018 Elsevier B.V.
英文关键词	Competition; Density management; Eichhorn; Growth; Langsaeter; Productivity; Quercus petraea; Site index
语种	英语
scopus关键词	Competition; Growth (materials); Productivity; Density management; Eichhorn; Langsaeter; Quercus petraea; Site index; Forestry; competition (ecology); deciduous tree; density; environmental change; experimental study; forest management; GIS; growth modeling; primary production; sessile species; site index; thinning; Competition; Forestry; Growth; Productivity; Quercus Petraea; Site Index; Stand Density; Quercus petraea
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/156282
作者单位	AgroParisTech, Centre de Nancy, UMR 1092 INRA/AgroParisTech Laboratoire d’Étude des Ressources Forêt Bois (LERFoB), 14 rue Girardet, 54000 Nancy, France; INRA, Centre de Nancy-Lorraine, UMR1092 INRA/AgroParisTech Laboratoire d’Étude des Ressources Forêt Bois (LERFoB), 54280 Champenoux, France
推荐引用方式 GB/T 7714	Trouvé R.,Bontemps J.-D.,Collet C.,等. When do dendrometric rules fail? Insights from 20 years of experimental thinnings on sessile oak in the GIS Coop network[J],2019,433.
APA	Trouvé R.,Bontemps J.-D.,Collet C.,Seynave I.,&Lebourgeois F..(2019).When do dendrometric rules fail? Insights from 20 years of experimental thinnings on sessile oak in the GIS Coop network.Forest Ecology and Management,433.
MLA	Trouvé R.,et al."When do dendrometric rules fail? Insights from 20 years of experimental thinnings on sessile oak in the GIS Coop network".Forest Ecology and Management 433(2019).