Historical invasion rates vary among insect trophic groups.
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Version: Author's accepted manuscript
License: CC BY-NC-ND 4.0
UNIL restricted access
State: Public
Version: Author's accepted manuscript
License: CC BY-NC-ND 4.0
Serval ID
serval:BIB_796256F7E745
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Historical invasion rates vary among insect trophic groups.
Journal
Current biology
ISSN
1879-0445 (Electronic)
ISSN-L
0960-9822
Publication state
In Press
Peer-reviewed
Oui
Language
english
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Publication Status: aheadofprint
Abstract
Globalization has spread thousands of invasive insect species into new world regions, <sup>1</sup> <sup>,</sup> <sup>2</sup> <sup>,</sup> <sup>3</sup> causing severe losses in ecosystem services. Previous work proposed that plant invasions facilitate insect invasions through the creation of niches for non-native herbivores. <sup>3</sup> <sup>,</sup> <sup>4</sup> <sup>,</sup> <sup>5</sup> <sup>,</sup> <sup>6</sup> Despite the impact of insect invasions, a comprehensive understanding is lacking on how invasion success varies among insect feeding groups. We therefore compiled the predominant larval trophic groups (herbivores, predators, parasites, detritivores, and brood-carers) for 5,839 non-native insect species in nine world regions to compare (1) proportions of species in each group between non-native species and the world's fauna, (2) how invasion success for each trophic group has changed over the last three centuries, and (3) how historical herbivore invasions are related to plant invasions over time and parasite invasions are related to herbivores. We find that herbivores represent a significantly larger proportion (52.4%) among non-native insects compared with the world fauna (38.4%), whereas proportions of non-native detritivores (including fungivores), predators, and brood-carers are significantly lower; parasite proportions do not significantly differ. Predators and detritivores dominated among invasions in the 18th century but subsequently diminished, likely due to changing invasion pathways, whereas proportions of herbivores, parasites, and brood-carers increased over time. We found herbivore invasions to lag 80 years behind plant invasions, whereas parasitoids appear to co-invade with their herbivore hosts. The dominance of herbivores among non-native insects and their strong cross-correlation with plant invasions further strengthens the hypothesis that plant invasions drive the global rise in numbers of non-native insects.
Keywords
brood care, detritivore, herbivore, invasion disharmony, larval feeding modes, non-native insects, parasite, plant invasions, predator, trophic niches
Pubmed
Funding(s)
Swiss National Science Foundation
Create date
23/10/2024 19:40
Last modification date
02/11/2024 7:10