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Tree-ring evidence for the historical cyclic defoliator outbreaks on Larix potaninii in the central Hengduan Mountains, SW China
Fan, Ze-Xin; Braeuning, Achim
2017
Source PublicationECOLOGICAL INDICATORS
Volume71Issue:xPages:160-171
AbstractDendrochronological 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.
KeywordClimate Response Dendroecology Hengduan Mountains Insect Outbreak Larix Potaninii Tree Rings
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10336
Collection2012年后新成立研究组
Recommended Citation
GB/T 7714
Fan, Ze-Xin,Braeuning, Achim. 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,&Braeuning, Achim.(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,et al."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.
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