气候变化领域集成服务门户(CCPortal): Legacy forest structures in irregular shelterwoods differentially affect regeneration in a temperate hardwood forest

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DOI	10.1016/j.foreco.2019.117650
	Legacy forest structures in irregular shelterwoods differentially affect regeneration in a temperate hardwood forest
	Wikle J.; Duguid M.; Ashton M.S.
发表日期	2019
ISSN	0378-1127
卷号	454
英文摘要	Foresters are faced with managing forests for a broad variety of societal demands such as wildlife habitat, aesthetics and site stability while still providing monetary value to landowners through timber harvest. Regeneration methods need to be developed that offer alternatives to traditional management for timber to help meet these goals. Regeneration responses in third-growth forest stands, or those following harvest of second-growth stands are not well-studied. Such forests are now widespread across temperate regions and may exhibit growth patterns different than those reported previously for regenerating second growth that originated on land abandoned from agriculture. There is a need for research that can lead to new methods or modification of existing practice. Our study examines legacy trees and the associated regeneration across a 25-year chronosequence of 34 irregular shelterwoods regenerated from second-growth forest in southern New England. We compared regeneration of the three most common regenerating tree species: red maple (Acer rubrum), black birch (Betula lenta), and red oak (Quercus rubra). We used regression analyses to examine changes through time in height growth of the tallest regeneration for each species as well as changes in total abundance. Similarly, regressions for annual height growth of regeneration in relation to legacy overstory basal area were compared for each species. Over time, self-thinning occurred in the regeneration of all focus species, but at different rates. Black birch thinned most dramatically through time, and the saplings that survived retained a high position in the canopy. Red oak self-thinned most slowly, and its tallest stems retained competitive height, although did not surpass black birch. As legacy overstory basal area increased, annual growth of red oak regeneration slowed. Stand dynamics patterns are therefore significantly different from those of second growth forests where oak is a more vigorous competitor in both number and growth as compared black birch and red maple. Our results suggest that resource managers need to both recognize these differences in stand development and consider the tradeoff between increasing legacy trees and decreases in growth rate of oak regeneration, as well as long-term effects of increased structure post-timber harvest. © 2019 Elsevier B.V.
英文关键词	Acer rubrum; Betula lenta; New England; Quercus rubra; Reserve trees; Stand dynamics
语种	英语
scopus关键词	Hardwoods; Harvesting; Regression analysis; Timber; Acer rubrum; Betula lenta; New England; Quercus rubra; Reserve trees; Stand dynamics; Reforestation; basal area; chronosequence; deciduous tree; esthetics; forest ecosystem; forest management; growth rate; overstory; population dynamics; self thinning; shelterbelt; stand structure; timber harvesting; Acer Rubrum; Betula Lenta; Hardwoods; Harvesting; New England; Regression Analysis; New England; United States; Acer rubrum; Betula lenta; Betula nigra; 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/155693
作者单位	Yale School of Forestry & Environmental Studies, 195 Prospect Street, New Haven, CT 06511, United States
推荐引用方式 GB/T 7714	Wikle J.,Duguid M.,Ashton M.S.. Legacy forest structures in irregular shelterwoods differentially affect regeneration in a temperate hardwood forest[J],2019,454.
APA	Wikle J.,Duguid M.,&Ashton M.S..(2019).Legacy forest structures in irregular shelterwoods differentially affect regeneration in a temperate hardwood forest.Forest Ecology and Management,454.
MLA	Wikle J.,et al."Legacy forest structures in irregular shelterwoods differentially affect regeneration in a temperate hardwood forest".Forest Ecology and Management 454(2019).