气候变化领域集成服务门户(CCPortal): Combining partial cutting and direct seeding to overcome regeneration failures in dune forests

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DOI	10.1016/j.foreco.2020.118466
	Combining partial cutting and direct seeding to overcome regeneration failures in dune forests
	Guignabert A.; Augusto L.; Delerue F.; Maugard F.; Gire C.; Magnin C.; Niollet S.; Gonzalez M.
发表日期	2020
ISSN	0378-1127
卷号	476
英文摘要	Stand regeneration is a crucial step in the management of many forests and its failure can jeopardize future forest growth and production. Thus, adapting forestry practices to improve seedling establishment is of prime importance to maintain sustainable forest management. In the coastal dune forests of maritime pine in SW France, regeneration failure after clear-cutting has greatly increased in the last decades. The aim of this study was to quantify the different stages involved in the regeneration process (seed rain, germination, survival), and to assess the impact of harvesting methods (partial cutting vs. clear-cutting) and of the use of direct seeding (seeding vs. no seeding) on these stages. We established five trials located in areas with contrasting regeneration statuses (of which two sites were in an area characterized by chronic regeneration failure), and we investigated the effect of the harvesting method and the use of direct seeding in a factorial design. We monitored the seed rain, germination and first-year survival for three years. Due to the transient nature of the seed bank, we found that the seed rain of the previous year was the only possible seed source for tree regeneration, and it increased with the proximity and size of surrounding mature trees. Nonetheless, seed rain did not limit regeneration in these stands. In fact, germination was the bottleneck stage of the regeneration process in all sites because it was short-lived and consequently exposed to failure in case of unfavourable conditions. Once established, seedling death was mainly due to summer drought. Clear-cutting without seeding resulted in severe regeneration failures in 4 out of 5 sites, with the most severe in the failure area. Direct seeding increased seedling emergence only in the first year, while partial cutting had a longer-lasting effect by providing a regular seed supply over several years. Partial cutting also decreased biotic and abiotic stresses through microhabitat modification under the tree canopy, resulting in a higher number of germinations and greater seedling survival. This positive effect was more pronounced in the two sites within the failure area, suggesting that conditions were more stressful in this part of the forests. Consequently, we recommend avoiding clear-cutting in favour of partial cutting in all parts of these forests, and ensuring the maintenance of sufficient forest cover to promote regeneration. Direct seeding could be used in addition to partial cutting to maximize the chances of success, but only in areas where natural regeneration is low. © 2020 Elsevier B.V.
英文关键词	Direct seeding; Drought; Forest management; Germination; Partial cutting; Pinus pinaster; Seed availability; Seedling survival; Tree regeneration
语种	英语
scopus关键词	Cultivation; Rain; Seed; Biotic and abiotic stress; Harvesting methods; Natural regeneration; Regeneration failure; Regeneration process; Seedling establishment; Stand regeneration; Sustainable forest management; Reforestation; clearcutting; cutting (process); dune; forest cover; forest ecosystem; forest management; forestry practice; microhabitat; seeding; seedling establishment; sustainable forestry; Cultivation; Cutting; Failure; Natural Reforestation; Rain; Seeding; Sustainable Forest Management; France; Pinus pinaster
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/155011
作者单位	UMR 1391 ISPA, Bordeaux Sciences Agro, INRAE, Villenave d'Ornon, 33140, France; EA 4592, G&E, Bordeaux INP, Pessac, 33600, France; EA 4592, G&E, Université Bordeaux Montaigne, Pessac, 33600, France; ONF, 9, rue Raymond Manaud, Bruges, 33524, France
推荐引用方式 GB/T 7714	Guignabert A.,Augusto L.,Delerue F.,et al. Combining partial cutting and direct seeding to overcome regeneration failures in dune forests[J],2020,476.
APA	Guignabert A..,Augusto L..,Delerue F..,Maugard F..,Gire C..,...&Gonzalez M..(2020).Combining partial cutting and direct seeding to overcome regeneration failures in dune forests.Forest Ecology and Management,476.
MLA	Guignabert A.,et al."Combining partial cutting and direct seeding to overcome regeneration failures in dune forests".Forest Ecology and Management 476(2020).