Global compositional variation among native and non-native regional insect assemblages emphasizes the importance of pathways

Autor: Eckehard G. Brockerhoff, Sylvie Augustin, Alain Roques, Takehiko Yamanaka, Steven L. Chown, Petr Pyšek, Andrew M. Liebhold
Přispěvatelé: Northern Research Station, Forest Research [Great Britain], National Institute of Agro-Environmental Sciences (NIAES), Unité de recherche Zoologie Forestière (URZF), Institut National de la Recherche Agronomique (INRA), School of Biological Sciences, University of East Anglia [Norwich] (UEA), New Zealand Forest Research Institute, Institute of Botany, Czech Academy of Sciences [Prague] (CAS)
Rok vydání: 2016
Předmět:
Zdroj: Biological Invasions
Biological Invasions, Springer Verlag, 2016, 18 (4), pp.893-905. ⟨10.1007/s10530-016-1079-4⟩
Biological Invasions 4 (18), 893-905. (2016)
ISSN: 1573-1464
1387-3547
Popis: International audience; Insects are among the world’s most ecologically and economically important invasive species. Here we assemble inventories of native and non-native species from 20 world regions and contrast relative numbers among these species assemblages. Multivariate ordination indicates that the distribution of species among insect orders is completely different between native and non-native assemblages. Some orders, such as the Psocoptera, Dictyoptera, Siphonaptera, Thysanoptera, and Hemiptera, are always over-represented in the non-native compared to native assemblages. Other orders, such as the Plecoptera, Trichoptera, Ephemeroptera, Odonata, Mecoptera and Microcoryphila, are consistently under-represented in non-native assemblages. These patterns most likely arise both as a result of variation among taxa in their association with invasion pathways responsible for transporting species among world regions, as well as variation in life-history traits that affect establishment potential. However, our results indicate that species compositions associated with invasiveness are fundamentally different from compositions related to insularity, indicating that colonization of islands selects for a different group of insect taxa than does selection for successful invaders. Native and non-native assemblage compositions were also related, to a lesser extent, to latitude of the region sampled. Together, these results illustrate the dominant role of invasion pathways in shaping the composition of non-native insect assemblages. They also emphasize the difference between natural background colonization of islands and anthropogenic colonization events, and imply that biological invasions are not a simple subset of a long-standing ecological process.
Databáze: OpenAIRE
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