气候变化领域集成服务门户(CCPortal): Long-term effects of group opening size and site preparation method on gap-cohort development in a temperate mixedwood forest

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DOI	10.1016/j.foreco.2020.118616
	Long-term effects of group opening size and site preparation method on gap-cohort development in a temperate mixedwood forest
	Mohler C.; Bataineh M.; Bragg D.C.; Ficklin R.; Pelkki M.; Olson M.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Management aimed at regenerating softwoods and hardwoods in the same stand (i.e., a mixedwood) has some appeal in the pine-hardwood forests of the southern United States. We revisited a group selection experiment installed in 1991 to evaluate the influence of gap size and site preparation treatments on a pine-hardwood stand in Louisiana, USA. Experimental treatments included a factorial combination of three group opening sizes (0.1, 0.25, 0.4 ha) and three methods of site preparation (chemical, mechanical, untreated) in the harvest gaps. Specifically, we tested two hypotheses: 1) regeneration of shade-intolerant tree species increased with gap size and the addition of site preparation and 2) if this site preparation decreased the regeneration of species that are more tolerant of shade and reliant on advance reproduction. In 2016, the density and basal area of the shade-intolerant loblolly pine (Pinus taeda), shortleaf pine (Pinus echinata), and sweetgum (Liquidambar styraciflua) increased with increasing gap size (P < 0.05), supporting our first hypothesis. Compared to untreated gaps, white oak (Quercus section Quercus), red oak (Quercus section Lobate), and red maple (Acer rubrum) abundances were significantly reduced in gaps treated with chemical or mechanical site preparation, supporting of our second hypothesis. Based on these results, it appears possible to secure adequate pine regeneration with a relatively wide range of early gap-treatment option in similar pine-hardwood forest types. However, pines dominated nearly all gaps (regardless of treatment), so much so that many no longer qualify as mixedwood. This outcome suggests that managers interested in group selection for mixedwoods in this part of the coastal plain should consider creating larger gaps (≥0.25 ha) in areas with preferred hardwood advance reproduction, while limiting within-gap site preparation to help protect it. © 2020 Elsevier B.V.
语种	英语
scopus关键词	Cell proliferation; Hardwoods; Hardwood forests; Hardwood stands; Long-term effects; Louisiana , USA; Mechanical site preparation; Mixedwood forests; Shade intolerant; Site preparation; Reforestation; basal area; coastal plain; coniferous forest; experimental study; forest management; gap dynamics; long-term change; methodology; mixed forest; regeneration; shade tolerance; site preparation; temperate forest; Acer Rubrum Tridens; Hardwoods; Pinus Taeda; Quercus Alba; Reforestation; Reproduction; Selection; Site Preparation; Louisiana; United States; Acer rubrum; Liquidambar; Liquidambar styraciflua; Pinus echinata; Pinus taeda; Quercus; Quercus alba; Quercus rubra
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/154861
作者单位	University of Arkansas at Monticello, United States; US Forest Service, United States; Stockton University, United States
推荐引用方式 GB/T 7714	Mohler C.,Bataineh M.,Bragg D.C.,et al. Long-term effects of group opening size and site preparation method on gap-cohort development in a temperate mixedwood forest[J],2021,480.
APA	Mohler C.,Bataineh M.,Bragg D.C.,Ficklin R.,Pelkki M.,&Olson M..(2021).Long-term effects of group opening size and site preparation method on gap-cohort development in a temperate mixedwood forest.Forest Ecology and Management,480.
MLA	Mohler C.,et al."Long-term effects of group opening size and site preparation method on gap-cohort development in a temperate mixedwood forest".Forest Ecology and Management 480(2021).