气候变化领域集成服务门户(CCPortal): Variation in population densities of the green spruce aphid Elatobium abietinum (Walker) in relation to tree age and forest stand structure

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DOI	10.1016/j.foreco.2020.118036
	Variation in population densities of the green spruce aphid Elatobium abietinum (Walker) in relation to tree age and forest stand structure
	Straw N.A.; Bladon F.M.; Williams D.T.; Fielding N.J.
发表日期	2020
ISSN	0378-1127
卷号	464
英文摘要	Population densities of the green spruce aphid Elatobium abietinum (Walker) (Homoptera: Aphididae) were assessed by direct counting and trapping in 24 Sitka spruce stands that were being managed either by clear-felling and replanting, or by selective thinning under a shelterwood or group selection silvicultural system. It was expected that E. abietinum populations would be lower in shelterwood and group selection spruce stands, because of their greater structural diversity, but instead, maximum E. abietinum densities in the shelterwood and group selection stands were intermediate or higher than the maximum densities recorded in the even-aged spruce stands created by clear-felling. Variation in aphid densities between stands was more closely correlated with stand age and the mean DBH of the largest trees in the stand, and (negatively) with tree density (trees ha−1). The highest mean E. abietinum densities (9.9–14.9 aphids.100 needles−1) were recorded in even-aged stands that were approaching commercial maturity, and on the main crop trees and very young naturally regenerating trees in shelterwood stands. The results of the study indicate that if E. abietinum populations in the U.K. increase in the future in response to climate change, as is predicted, then the most severe impacts of aphid infestation will be seen first in the oldest even-aged Sitka spruce stands, and in shelterwood stands where large spruce trees have been retained beyond the normal rotation age. © 2020
关键词	Climate change Population dynamics Population statistics Timber Continuous cover forestries Elatobium abietinum Insect abundance Management systems Picea sitchensis Plantation forestry Sitka spruce Stand structures Reforestation abundance aphid clearcutting forest cover group selection plantation forestry population density stand structure thinning tree Age Felling Picea Sitchensis Reforestation Selection Shelterwood Trees United Kingdom Aphididae Hemiptera Hexapoda Picea Picea sitchensis
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132876
推荐引用方式 GB/T 7714	Straw N.A.,Bladon F.M.,Williams D.T.,et al. Variation in population densities of the green spruce aphid Elatobium abietinum (Walker) in relation to tree age and forest stand structure[J]. Forest Ecology and Management,2020,464.
APA	Straw N.A.,Bladon F.M.,Williams D.T.,&Fielding N.J..(2020).Variation in population densities of the green spruce aphid Elatobium abietinum (Walker) in relation to tree age and forest stand structure.,464.
MLA	Straw N.A.,et al."Variation in population densities of the green spruce aphid Elatobium abietinum (Walker) in relation to tree age and forest stand structure".464(2020).