气候变化领域集成服务门户(CCPortal): Forest structure more important than topography in determining windthrow during Hurricane Juan in Canada's Acadian Forest

CCPortal

DOI	10.1016/j.foreco.2018.12.026
	Forest structure more important than topography in determining windthrow during Hurricane Juan in Canada's Acadian Forest
	Taylor A.R.; Dracup E.; MacLean D.A.; Boulanger Y.; Endicott S.
发表日期	2019
ISSN	0378-1127
起始页码	255
结束页码	263
卷号	434
英文摘要	Wind is an important driver of forest dynamics in eastern Canada, but knowledge of variables that predispose forest stands to windthrow remains unclear. This is of particular concern as climate change is expected to alter the frequency of strong wind events that affect eastern Canada. In this study, we used widescale forest survey data from Nova Scotia, Canada, of wind damage caused by Hurricane Juan, to investigate variables that influence stand vulnerability to windthrow. Juan made landfall as a category SS2 hurricane with sustained winds of 158 km/h and damaged over 600,000 ha of forest. The damage zone was surveyed using aerial photography and satellite imagery, delineated according to level of wind damage, and digitized as a 15 × 15 m resolution spatial raster layer. We selected a random sample of 50,000 cells classified as intact forest and 50,000 cells classified as stand-replacing windthrow from the raster layer and used boosted regression tree analysis to explore the influence of various meteorological, topographic, soil, and forest structural variables on the occurrence of windthrow. Wind speed and forest structure, specifically stand height and species composition, were most influential in determining windthrow. Sustained winds of at least 95 km/h or gusts of 130 km/h caused >50% probability of windthrow. Taller stands were most vulnerable, especially those dominated by spruce (Picea spp.) and balsam fir (Abies balsamea), whereas higher hardwood and pine abundance reduced windthrow. Interestingly, topographical exposure (Topex) ranked low in overall influence; however, a clear relationship between increased exposure and windthrow was observed. © 2018
英文关键词	Disturbance; Forest dynamics; Hurricane; Stand structure; Windthrow
语种	英语
scopus关键词	Aerial photography; Antennas; Climate change; Hurricanes; Rasterization; Satellite imagery; Surveys; Wind; Balsam fir (Abies balsamea); Boosted regression trees; Disturbance; Forest dynamics; Forest structure; Species composition; Stand structures; Windthrows; Forestry; abundance; aerial photography; climate change; coniferous tree; disturbance; forest dynamics; forest ecosystem; hurricane; raster; satellite imagery; stand structure; topography; vulnerability; windthrow; Air Craft; Cells; Damage; Eastern Canada; Forestry; Surveys; Variables; Wind; Canada; Nova Scotia; Abies balsamea; Picea
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/156207
作者单位	Natural Resources Canada, Canadian Forest Service – Atlantic Forestry Centre, 1350 Regent Street, PO Box 4000, Fredericton, New Brunswick E3B 5P7, Canada; Faculty of Forestry and Environmental Management, University of New Brunswick, 28 Dineen Drive, Fredericton, NB E3B 5A3, Canada; Natural Resources Canada, Canadian Forest Service – Laurentian Forestry Centre, 1055 rue du P.E.P.S., P.O. Box 10380, Stn. Sainte-Foy, Quebec, QC G1V 4C7, Canada
推荐引用方式 GB/T 7714	Taylor A.R.,Dracup E.,MacLean D.A.,et al. Forest structure more important than topography in determining windthrow during Hurricane Juan in Canada's Acadian Forest[J],2019,434.
APA	Taylor A.R.,Dracup E.,MacLean D.A.,Boulanger Y.,&Endicott S..(2019).Forest structure more important than topography in determining windthrow during Hurricane Juan in Canada's Acadian Forest.Forest Ecology and Management,434.
MLA	Taylor A.R.,et al."Forest structure more important than topography in determining windthrow during Hurricane Juan in Canada's Acadian Forest".Forest Ecology and Management 434(2019).