The Asian paper wasp may consume a significant amount of invertebrate prey, putting prey species at direct risk of population decline, and indirectly threatening native insectivores by exerting competitive pressures on them (these may include native invertebrates or reptile species) (Clapperton 1999, Kleinpaste 2000, in Toft and Harris 2004). For example, it may prey on larvae of native Lepidoptera species, such as the monarch butterfly (Danais plexippus), significantly reducing their population size. The Asia paper wasp may also compete with honeybees and native bird species for available honeydew and nectar resources (Clapperton et al. 1996). Secondary flow down effects are also possible from these disruptions to ecosystem processes is possible (ie: the disruption of pollination due to honeybee population decline).
The Asian paper wasp is a considerable public nuisance, stinging people when it is disturbed and constructing its nest on houses; according to one survey they are held accountable for the greatest number of stings received in Auckland (Dymock et al. 1994, in Clapperton et al. 1996).
Location Specific Impacts:
Competition: The Asian paper wasp exerts predation pressures on native invertebrates; at Lake Ohia (in the Northland region of New Zealand) the paper wasp is estimated to consume 957g/ha of invertebrate biomass each season (Toft and Harris, 2004). In addition, direct competition exists between the Asian paper wasps and native insectivores as they contest over nectar and honeydew resources (Toft and Harris, 2004).
Northland Region (New Zealand)
Competition: The main protein source of paper wasps comes from live lepidopteran larvae such as those belonging to moths and butterflies (Rabb and Lawson,
1957). Consequently, an alteration in the native ecological system may occur due to the competition with other insectivorous species. In addition, potential threats to plant pollination exist due to competition between the paper wasps and the nectar-feeders at flowers and fruit, as well as the honeydew produced by homopterous insects (Rabb, 1960). The Asian paper wasp exerts predation pressures on native invertebrates; at Lake Ohia (in the Northland region of New Zealand) the paper wasp is estimated to consume 957g/ha of invertebrate biomass each season (Clapperton, 1999).