Proceedings of the Royal Society of London. Series B, Biological Sciences (2007) 274, 671-679

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Jan Esper, Ulf Büntgen, David C. Frank, Daniel Nievergelt and Andrew Liebhold (2007)
1200 years of regular outbreaks in alpine insects
Proceedings of the Royal Society of London. Series B, Biological Sciences 274 (1610), 671-679
Abstract: The long-term history of Zeiraphera diniana Gn. (the larch budmoth, LBM) outbreaks was reconstructed from tree rings of host subalpine larch in the European Alps. This record was derived from 47 513 maximum latewood density measurements, and highlights the impact of contemporary climate change on ecological disturbance regimes. With over 1000 generations represented, this is the longest annually resolved record of herbivore population dynamics, and our analysis demonstrates that remarkably regular LBM fluctuations persisted over the past 1173 years with population peaks averaging every 9.3 years. These regular abundance oscillations recurred until 1981, with the absence of peak events during recent decades. Comparison with an annually resolved, millennium-long temperature reconstruction representative for the European Alps (r = 0.72, correlation with instrumental data) demonstrates that regular insect population cycles continued despite major climatic changes related to warming during medieval times and cooling during the Little Ice Age. The late twentieth century absence of LBM outbreaks, however, corresponds to a period of regional warmth that is exceptional with respect to the last 1000Cyears, suggesting vulnerability of an otherwise stable ecological system in a warming environment.
Link to article at publishers website
Database assignments for author(s): Andrew M. Liebhold, Ulf Büntgen

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
environment - cropping system/rotation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Zeiraphera griseana Switzerland