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Dryad

Data for: International non-native Hemiptera invasion database

Data files

Jul 25, 2024 version files 196.47 KB

Abstract

Aim

The Hemiptera is the fifth-largest insect order but comprises more established non-native insect species than any other insect order. This over-representation may result from high propagule pressure or from high species invasiveness. Here, we assess the reasons for over-representation in this group by analyzing geographical, temporal and taxonomic variation in numbers of historical invasions.

Location

Global Method We assembled lists of historical Hemiptera invasions in 12 world regions, countries or islands (Australia, Chile, Europe, New Zealand, North America, South Africa, South Korea, Japan, and the Galapagos, Hawaiian, Okinawa, and Ogasawara Islands) and border interception data from 9 countries (Australia, Canada, European Union, United Kingdom, Hawaii, Japan, New Zealand, South Korea, USA mainland, South Africa). Using these data, we identified hemipteran superfamilies that are historically over-represented among established non-native species, and superfamilies that are over-represented among arrivals (proxied by interceptions). We also compared temporal patterns of establishments among hemipteran suborders and among regions.

Results

Across all regions, patterns of over- and under-representation were similar. The Aphidoidea, Coccoidea, Aleyrodoidea, Cimicoidea and Phylloxeroida were over-represented among non-native species. These same superfamilies were not consistently over-represented among intercepted species indicating that propagule pressure does not completely explain the tendency of some Hemiptera to be over-represented among invasions. Asexual reproduction is common in nearly all over-represented superfamilies and this trait may be key to explaining the exceptional invasion success of these superfamilies. Geographical and temporal patterns of historical numbers of species established per decade mirror trends of naturalization of non-native plants.

Conclusions

We conclude that both propagule pressure and species invasiveness traits are drivers of the exceptional invasion success of the Sternorrhyncha suborder and Hemiptera in general. Most Hemiptera are plant-feeding; we conclude that non-native plant invasions provide ecological niches for non-native Hemiptera and play a role in driving their invasions worldwide.