气候变化领域集成服务门户(CCPortal): Effects of disturbance and site factors on sapling dynamics and species diversity in northern hardwood stands

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DOI	10.1016/j.foreco.2019.04.041
	Effects of disturbance and site factors on sapling dynamics and species diversity in northern hardwood stands
	Danyagri G.; Baral S.K.; Pelletier G.
发表日期	2019
ISSN	0378-1127
起始页码	225
结束页码	234
卷号	444
英文摘要	The northern hardwoods forest ecosystem of eastern North America provides a wealth of products and services to human society. These forests have been managed under partial harvesting treatments to meet wood production objectives of desired species while maintaining or increasing structural and compositional heterogeneity. Few studies have examined how disturbance and site factors interactions may influence sapling dynamics and species diversity in northern hardwood forests. We used a retrospective approach to examine the impacts of disturbance and site factors on sapling (trees > 130 cm in height and <10.0 cm dbh) dynamics and species diversity across 37 stands with time since harvest ranging from 6 to 20 years. We assessed American beech (Fagus grandifolia Ehrh), sugar maple (Acer saccharum Marsh.), red maple (Acer rubrum L.) and yellow birch (Betula alleghaniensis Britt.) saplings density as functions of disturbance intensity (% basal area cut and overstory tree mortality rate (%)) and site factors. We also examined the effects of disturbance, site factors and relative density of American beech, red maple, sugar maple and yellow birch saplings on species diversity at the sapling layer. The density of American beech saplings decreased significantly with harvest intensity. High harvest intensity significantly reduced American beech sapling density at high depth-to-water sites. However, the densities of red maple and yellow birch saplings increased significantly with increasing harvest intensity. We found that high harvest intensities had less negative effect on sugar maple sapling density compared with American beech. Our results also showed that tree species diversity (Shannon diversity index (H′)) increased with harvest intensity up to about 75% and then declined. However, depth-to-water (DTW) significantly changed the magnitude of tree species diversity response to harvest intensity. Red maple appeared to have contributed more to species diversity than the other hardwood tree species. Given that sugar maple sapling density was generally higher than American beech at high harvest intensities in this study, management regimes that promote mid-tolerant species in American beech-presence stands may eventually benefit sugar maple more than American beech in these forest types. These strategies may also increase species diversity and improve forest ecosystems functions and services. © 2019
英文关键词	Disturbance; Forest management; Northern hardwoods; Sapling density; Species diversity
语种	英语
scopus关键词	Biodiversity; Dynamics; Ecosystems; Hardwoods; Harvesting; Compositional heterogeneity; Disturbance; Eastern north america; Northern hardwood forest; Northern hardwoods; Products and services; Sapling densities; Tree species diversity; Forestry; deciduous tree; disturbance; diversity index; ecosystem function; ecosystem service; forest ecosystem; forest management; sapling; species diversity; Biodiversity; Dynamics; Ecosystems; Forestry; Hardwoods; Harvesting; North America; Acer rubrum; Acer saccharum; Betula alleghaniensis; Fagus grandifolia
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/155988
作者单位	Northern Hardwoods Research Institute Inc., Edmundston, NB E3V 2S8, Canada; B.C. Ministry of Forests, Lands, Natural Resource Operations and Rural Development, Williams Lake, BC V2G 4T1, Canada; B.C. Ministry of Forests, Lands, Natural Resource Operations and Rural Development, Victoria, BC V8W 1R8, Canada
推荐引用方式 GB/T 7714	Danyagri G.,Baral S.K.,Pelletier G.. Effects of disturbance and site factors on sapling dynamics and species diversity in northern hardwood stands[J],2019,444.
APA	Danyagri G.,Baral S.K.,&Pelletier G..(2019).Effects of disturbance and site factors on sapling dynamics and species diversity in northern hardwood stands.Forest Ecology and Management,444.
MLA	Danyagri G.,et al."Effects of disturbance and site factors on sapling dynamics and species diversity in northern hardwood stands".Forest Ecology and Management 444(2019).