Arthropod prey foraged by the German wasp (<i>Vespula germanica</i>) in NW Patagonia, Argentina.

Sackmann, Paula; D’Adamo, Paola; Rabinovich, M. S.; Corley, Juan C.

doi:10.1080/00779962.2000.9722067

Cited by 29 publications

(30 citation statements)

References 8 publications

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“…En general V. germanica es altamente generalista, alimentándose de nectar, miel de abejas domésti-cas, otros artrópodos, vertebrados muertos y restos de comida humana. En el BTSA, por ejemplo, V. germanica se alimenta de artrópodos de al menos nueve órdenes distintos, entre los que se encuentran polinizadores como abejas y sírfidos (Sackmann et al 2000). Aunque aún no existe información suficiente para evaluar el impacto de V. germanica, es posible que tenga efectos importantes en la fauna de invertebrados del BTSA.…”

Section: A P a G E R I A R O S E A C R I N O D E N D R O N H O O unclassified

Historia natural y conservación de los mutualismos planta-animal del bosque templado de Sudamérica austral

Aizen

Vázquez

Smith‐Ramírez

2002

Rev. chil. hist. nat.

101

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Section: A P a G E R I A R O S E A C R I N O D E N D R O N H O O unclassified

Historia natural y conservación de los mutualismos planta-animal del bosque templado de Sudamérica austral

Aizen

Vázquez

Smith‐Ramírez

2002

Rev. chil. hist. nat.

101

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“…It has also invaded and become established in New Zealand, Tasmania, Australia, South Africa, the USA, Canada, and Chile (Archer 1998). This species is an opportunistic predator and scavenger (Akre and Mac Donald 1986;Harris 1991;Barr et al 1996;Sackmann et al 2000), and preys on and competes with native insects, having the potential to restructure hosting communities (Beggs and Rees 1999;Beggs 2001). Although V. germanica inhabits several habitats of Patagonia, its local abundance at present is lower than in other invaded countries, such as New Zealand (Sackmann et al 2008).…”

Section: Introductionmentioning

confidence: 94%

Competition for food between the exotic wasp Vespula germanica and the native ant assemblage of NW Patagonia: evidence of biotic resistance?

2009

Self Cite

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The success of a biological invasion may depend on the interactions between the invader and the native biota. However, little experimental evidence demonstrates whether local species can successfully compete with exotics. We experimentally determined the existence of competition for food between the exotic wasp Vespula germanica, one of the most recent Patagonian invaders, and the native ant assemblage. Both wasps and ants are generalist predators and scavengers, sharing habitat and food resources. We selected 30 sites within scrubland habitats where both ants and wasps were present. At each site, we placed containers with protein baits under three treatments: wasp exclusion, ant exclusion, and control (i.e., free access for wasps and ants). Ant exclusion increased the number of wasps (with regard to a control), but wasp exclusion did not affect ant abundance. This result suggests that native ants affect the foraging activity of exotic wasps but not vice versa. Aggressive behaviors and worker aggregation may explain the competitive advantage of ants. Ants bite wasp legs and massively aggregate on food sources, physically limiting the landing of wasps on baits. If the outcome of interactions at baits reported here influence wasp population-level parameters, this competitive interaction could be one of the factors explaining the low abundance of this exotic wasp in NW Patagonia in comparison with other invaded regions.

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“…In all countries where the yellowjacket wasp has been introduced, it has become a serious problem for agriculture, apiculture, wildlife, and recreation activities (Harris and Oliver 1993;Matthews et al 2000;Sackmann et al 2000;Beggs 2001;Curkovic et al 2004;Kasper 2004). In Chile, this insect was introduced more than 30 years ago (Edwards 1976;Archer 1998) and, during the last decade, high wasp densities have threatened recreational and tourist activities, and have also had a serious impact on agricultural work on fruit farms and in vineyards (Curkovic et al 2004).…”

Section: Introductionmentioning

confidence: 98%

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

Estay

Lima

2009

Population Ecology

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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.

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Arthropod prey foraged by the German wasp (Vespula germanica) in NW Patagonia, Argentina.

Cited by 29 publications

References 8 publications

Historia natural y conservación de los mutualismos planta-animal del bosque templado de Sudamérica austral

Historia natural y conservación de los mutualismos planta-animal del bosque templado de Sudamérica austral

Competition for food between the exotic wasp Vespula germanica and the native ant assemblage of NW Patagonia: evidence of biotic resistance?

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

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