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Population Ecology

Erschienen in:

01.04.2010 | Original Article

Combined effect of ENSO and SAM on the population dynamics of the invasive yellowjacket wasp in central Chile

verfasst von: Sergio A. Estay, Mauricio Lima

Erschienen in: Population Ecology | Ausgabe 2/2010

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Abstract

The population dynamics of the yellowjacket wasp (Vespula germanica Fabricus) in central Chile were analyzed for the first time. Using a simple Ricker logistic model and adding the effects of local weather variables (temperature and precipitation) and large-scale climate phenomena as El Niño Southern Oscillation (ENSO) and the Southern Annular Mode (SAM), we modeled the interannual fluctuations in nest density. The best model according to the Bayesian information criterion (BIC) included 1-year-lag negative feedback combined with the positive additive effects of ENSO and SAM. According to this model, yellowjacket nest density was favored by warm and dry winters, which probably influenced the survival of overwintering queens. Large-scale climatic variables [Southern Oscillation Index (SOI) and SAM] described the effect of exogenous factors in wasp fluctuations better than local weather variables did. Our results emphasize the usefulness of climate indices and simple theoretical-based models in insect ecological research.

Vorheriger Artikel Nonlinear responses of wolverine populations to declining winter snowpack

Nächster Artikel Diverse population trajectories among coexisting species of subarctic forest moths

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Titel: Combined effect of ENSO and SAM on the population dynamics of the invasive yellowjacket wasp in central Chile
verfasst von: Sergio A. Estay
Mauricio Lima
Publikationsdatum: 01.04.2010
Verlag: Springer Japan
Erschienen in: Population Ecology / Ausgabe 2/2010
Print ISSN: 1438-3896
Elektronische ISSN: 1438-390X
DOI: https://doi.org/10.1007/s10144-009-0179-8

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