气候变化领域集成服务门户(CCPortal): Mountain pine beetle outbreak enhanced resin duct-defenses of lodgepole pine trees

CCPortal

DOI	10.1016/j.foreco.2019.03.023
	Mountain pine beetle outbreak enhanced resin duct-defenses of lodgepole pine trees
	Zhao S.; Klutsch J.G.; Cale J.A.; Erbilgin N.
发表日期	2019
ISSN	0378-1127
起始页码	271
结束页码	279
卷号	441
英文摘要	Millions of hectares of lodgepole pine trees have been affected by the recent mountain pine beetle outbreaks, which also left significant numbers of live host trees in some areas. Studies have primarily focused on the changes of forest conditions in post-outbreak stands, but whether such changes impact the growth, defense, and their interactions of residual pine trees is generally unknown. In this study, we compared the growth-defense relationship of lodgepole pine trees between pre- and post-outbreak periods by examining annual radial growth rates and xylem resin duct characteristics. We also tested the effects of varying percent host tree mortality and forest stand density on the growth-defense relationship of residual pine trees. We found that resin duct densities of residual pine trees were higher and resin ducts occupied larger areas in the xylem in post-outbreak period than in pre-outbreak period. Following outbreak, the percent host mortality showed a positive relationship with the resin duct density of all healthy residual trees, while stand density did not impact any of the resin duct characteristics. We conclude that bark beetle outbreaks can alter the growth, defense, and their interactions of residual pine trees, especially in stands with greater levels of pine mortality. This study also provides an empirical evidence, suggesting that residual trees might be more resistant to future bark beetle attacks. © 2019 Elsevier B.V.
英文关键词	Bark beetle outbreaks; Dendroctonus ponderosae; Pinus contorta; Post-outbreak stand conditions; Tree anatomical defense; Tree resistance
语种	英语
scopus关键词	Ducts; Network security; Resins; Bark beetle; Dendroctonus ponderosae; Pinus contorta; Post-outbreak stand conditions; Tree anatomical defense; Tree resistance; Forestry; bark; beetle; coniferous forest; disease resistance; montane forest; mortality; pest outbreak; resin; stand structure; xylem; Ducts; Forestry; Growth; Mortality; Pinus Contorta; Stand Density; Trees; Coleoptera; Dendroctonus ponderosae; Pinus contorta; Pinus mugo; Scolytinae
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/156031
作者单位	4-42 Earth Sciences Building, Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
推荐引用方式 GB/T 7714	Zhao S.,Klutsch J.G.,Cale J.A.,et al. Mountain pine beetle outbreak enhanced resin duct-defenses of lodgepole pine trees[J],2019,441.
APA	Zhao S.,Klutsch J.G.,Cale J.A.,&Erbilgin N..(2019).Mountain pine beetle outbreak enhanced resin duct-defenses of lodgepole pine trees.Forest Ecology and Management,441.
MLA	Zhao S.,et al."Mountain pine beetle outbreak enhanced resin duct-defenses of lodgepole pine trees".Forest Ecology and Management 441(2019).