Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 2012年后新成立研究组

	Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China
	Fan, Ze-Xin
刊名	ECOLOGICAL INDICATORS
	2017
卷号	71 期号:x 页码:160-171
关键词	Climate response Dendroecology Hengduan Mountains Insect outbreak Larix potaninii Tree rings
中文摘要	Dendrochronological methods have been used to reconstruct insect outbreaks, yet the application has been scarce in the high Asia. We compiled tree-ring data from 4 host (Larix potaninii) and 4 non-host (Abies and Picea) sites in the central Hengduan Mountains, southwestern China. We assessed site-specific growth-climate responses and applied two methods to detecting larch insect defoliation events during the past 250 years. Compared with the non-host chronologies, larch trees (host) showed periodic reduction in radial growth, which may be associated with outbreaks of a larch defoliator. Synchronously, growth reductions was found for three low-elevation sites, such as during 1783-1790, 1846-1850, 1860-1865, 1873-1878, 1900-1909, 1939-1945, 1965-1970 and 1981-1986. However, these periods of outbreaks differ from those of a high-elevation site. With spectral analyses, we found 11-13 years frequency domains for three low-elevation larch chronologies, while 7-9 year peaks presented one high elevation site. Contrastively, no significant frequency domains within the same periodicity were found in ring-width chronologies of co-occurring non-host species. We provide tree-ring evidence that larch trees growing in the central Hengduan Mountains have been infected by insect defoliators repeatedly. We suggest that appropriate approaches should be applied to correct insect-defoliation signals when using larch tree-ring data as a climatic proxy.
语种	英语
公开日期	2017-04-18
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10336]
专题	西双版纳热带植物园_2012年后新成立研究组
推荐引用方式 GB/T 7714	Fan, Ze-Xin. Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China[J]. ECOLOGICAL INDICATORS,2017,71(x):160-171.
APA	Fan, Ze-Xin.(2017).Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China.ECOLOGICAL INDICATORS,71(x),160-171.
MLA	Fan, Ze-Xin."Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China".ECOLOGICAL INDICATORS 71.x(2017):160-171.