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Article ; Online: Biological invasions: The secret domination of alien ants.

Bertelsmeier, Cleo

2023 Volume 33, Issue 10, Page(s) R410–R413

Abstract: Globalization has contributed to the spread of thousands of species, yet only a few harmful ones have attracted most attention. New evidence shows that introduced ants are a particularly important group of global invaders that can dominate native insect ... ...

Abstract	Globalization has contributed to the spread of thousands of species, yet only a few harmful ones have attracted most attention. New evidence shows that introduced ants are a particularly important group of global invaders that can dominate native insect communities.
MeSH term(s)	Animals ; Ants ; Introduced Species
Language	English
Publishing date	2023-05-09
Publishing country	England
Document type	Journal Article ; Comment
ZDB-ID	1071731-6
ISSN	1879-0445 ; 0960-9822
ISSN (online)	1879-0445
ISSN	0960-9822
DOI	10.1016/j.cub.2023.03.053
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Article ; Online: Globalization and the anthropogenic spread of invasive social insects.

Bertelsmeier, Cleo

Current opinion in insect science

2021 Volume 46, Page(s) 16–23

Abstract: Social insects are among the worst invasive species and a better understanding of their anthropogenic spread is needed. I highlight recent research demonstrating that social insects have been dispersed since the early beginnings of globalized trade and ... ...

Abstract	Social insects are among the worst invasive species and a better understanding of their anthropogenic spread is needed. I highlight recent research demonstrating that social insects have been dispersed since the early beginnings of globalized trade and in particular after the Industrial Revolution, following two waves of globalization. Many species have complex invasion histories, with multiple independent introduction events and frequent secondary spread. The major source and recipient regions differ markedly across ants, wasps, termites and bees, probably linked to their different introduction pathways. At a more local scale, anthropogenic factors such as irrigation, urbanization or the presence of railways facilitate invasions. In the future, social insect invasions could further accelerate due to intensifying global trade and novel introduction pathways.
MeSH term(s)	Animals ; Ants ; Bees ; Insecta ; Internationality ; Introduced Species ; Wasps
Language	English
Publishing date	2021-02-02
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	2772833-X
ISSN	2214-5753 ; 2214-5745
ISSN (online)	2214-5753
ISSN	2214-5745
DOI	10.1016/j.cois.2021.01.006
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Article ; Online: Non-native ants are breaking down biogeographic boundaries and homogenizing community assemblages.

Aulus-Giacosa, Lucie / Ollier, Sébastien / Bertelsmeier, Cleo

Nature communications

2024 Volume 15, Issue 1, Page(s) 2266

Abstract: As geographic distance increases, species assemblages become more distinct, defining global biogeographic realms with abrupt biogeographic boundaries. Yet, it remains largely unknown to what extent these realms may change because of human-mediated ... ...

Abstract	As geographic distance increases, species assemblages become more distinct, defining global biogeographic realms with abrupt biogeographic boundaries. Yet, it remains largely unknown to what extent these realms may change because of human-mediated dispersal of species. Focusing on the distributions of 309 non-native ant species, we show that historical biogeographic patterns have already broken down into tropical versus non-tropical regions. Importantly, we demonstrate that these profound changes are not limited to the distribution patterns of non-native ants but fundamentally alter biogeographic boundaries of all ant biodiversity (13,774 species). In total, 52% of ant assemblages have become more similar, supporting a global trend of biotic homogenization. Strikingly, this trend was strongest on islands and in the tropics, which harbor some of the most vulnerable ecosystems. Overall, we show that the pervasive anthropogenic impacts on biodiversity override biogeographic patterns resulting from millions of years of evolution, and disproportionally affect particular regions.
MeSH term(s)	Animals ; Humans ; Ecosystem ; Ants ; Biodiversity
Language	English
Publishing date	2024-03-13
Publishing country	England
Document type	Journal Article
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-024-46359-9
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Article ; Online: Globalization and the anthropogenic spread of invasive social insects

Bertelsmeier, Cleo

Current Opinion in Insect Science. 2021 Aug., v. 46 p.16-23

2021

Abstract	Social insects are among the worst invasive species and a better understanding of their anthropogenic spread is needed. I highlight recent research demonstrating that social insects have been dispersed since the early beginnings of globalized trade and in particular after the Industrial Revolution, following two waves of globalization. Many species have complex invasion histories, with multiple independent introduction events and frequent secondary spread. The major source and recipient regions differ markedly across ants, wasps, termites and bees, probably linked to their different introduction pathways. At a more local scale, anthropogenic factors such as irrigation, urbanization or the presence of railways facilitate invasions. In the future, social insect invasions could further accelerate due to intensifying global trade and novel introduction pathways.
Keywords	globalization ; international trade ; invasive species ; irrigation ; secondary transmission ; social insects ; urbanization
Language	English
Dates of publication	2021-08
Size	p. 16-23.
Publishing place	Elsevier Inc.
Document type	Article ; Online
Note	Use and reproduction
ZDB-ID	2772833-X
ISSN	2214-5753 ; 2214-5745
ISSN (online)	2214-5753
ISSN	2214-5745
DOI	10.1016/j.cois.2021.01.006
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Article ; Online: Reliability of social media data in monitoring the global pet trade in ants.

Gippet, Jérôme M W / Sherpa, Zoé / Bertelsmeier, Cleo

Conservation biology : the journal of the Society for Conservation Biology

2023 Volume 37, Issue 3, Page(s) e13994

Abstract: The global pet trade is a major risk to biodiversity and humans and has become increasingly globalized, diversified, digitalized, and extremely difficult to control. With billions of internet users posting online daily, social media could be a powerful ... ...

Abstract	The global pet trade is a major risk to biodiversity and humans and has become increasingly globalized, diversified, digitalized, and extremely difficult to control. With billions of internet users posting online daily, social media could be a powerful surveillance tool. But it is unknown how reliably social media can track the global pet trade. We tested whether Instagram data predicted the geographic distribution of pet stores and the taxonomic composition of traded species in the emerging pet trade in ants (Hymenoptera, Formicidae). We visited 138 online stores selling ants as pets worldwide and recorded the species traded. We scraped ∼38,000 Instagram posts from ∼6300 users referencing ants as pets and analyzed comments on post and geolocation (available for ∼1800 users). We tested whether the number of Instagram users predicted the number of ant sellers per country and whether the species referenced as pets on Instagram matched the species offered in online stores, with a particular focus on invasive species. The location of Instagram users referencing ants as pets predicted the location of ant sellers across the globe (R
MeSH term(s)	Humans ; Animals ; Ants ; Conservation of Natural Resources ; Social Media ; Reproducibility of Results ; Commerce ; Introduced Species
Language	English
Publishing date	2023-01-19
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	58735-7
ISSN	1523-1739 ; 0888-8892
ISSN (online)	1523-1739
ISSN	0888-8892
DOI	10.1111/cobi.14041
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Article: A mechanistic statistical approach to infer invasion characteristics of human-dispersed species with complex life cycle.

Goel, Nikunj / Liebhold, Andrew M / Bertelsmeier, Cleo / Hooten, Mevin B / Korolev, Kirill S / Keitt, Timothy H

bioRxiv : the preprint server for biology

2024

Abstract: The rising introduction of invasive species through trade networks threatens biodiversity and ecosystem services. Yet, we have a limited understanding of how transportation networks determine patterns of range expansion. This is partly because current ... ...

Abstract	The rising introduction of invasive species through trade networks threatens biodiversity and ecosystem services. Yet, we have a limited understanding of how transportation networks determine patterns of range expansion. This is partly because current analytical models fail to integrate the invader's life-history dynamics with heterogeneity in human-mediated dispersal patterns. And partly because classical statistical methods often fail to provide reliable estimates of model parameters due to spatial biases in the presence-only records and lack of informative demographic data. To address these gaps, we first formulate an age-structured metapopulation model that uses a probability matrix to emulate human-mediated dispersal patterns. The model reveals that an invader spreads along the shortest network path, such that the inter-patch network distances decrease with increasing traffic volume and reproductive value of hitchhikers. Next, we propose a Bayesian statistical method to estimate model parameters using presence-only data and prior demographic knowledge. To show the utility of the statistical approach, we analyze zebra mussel (
Language	English
Publishing date	2024-02-12
Publishing country	United States
Document type	Preprint
DOI	10.1101/2024.02.09.578762
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Article ; Online: Invasiveness is linked to greater commercial success in the global pet trade.

Gippet, Jérôme M W / Bertelsmeier, Cleo

Proceedings of the National Academy of Sciences of the United States of America

2021 Volume 118, Issue 14

Abstract: The pet trade has become a multibillion-dollar global business, with tens of millions of animals traded annually. Pets are sometimes released by their owners or escape, and can become introduced outside of their native range, threatening biodiversity, ... ...

Abstract	The pet trade has become a multibillion-dollar global business, with tens of millions of animals traded annually. Pets are sometimes released by their owners or escape, and can become introduced outside of their native range, threatening biodiversity, agriculture, and health. So far, a comprehensive analysis of invasive species traded as pets is lacking. Here, using a unique dataset of 7,522 traded vertebrate species, we show that invasive species are strongly overrepresented in trade across mammals, birds, reptiles, amphibians, and fish. However, it is unclear whether this occurs because, over time, pet species had more opportunities to become invasive, or because invasive species have a greater commercial success. To test this, we focused on the emergent pet trade in ants, which is too recent to be responsible for any invasions so far. Nevertheless, invasive ants were similarly overrepresented, demonstrating that the pet trade specifically favors invasive species. We show that ant species with the greatest commercial success tend to have larger spatial distributions and more generalist habitat requirements, both of which are also associated with invasiveness. Our findings call for an increased risk awareness regarding the international trade of wildlife species as pets.
MeSH term(s)	Animals ; Ants ; Commerce/statistics & numerical data ; Introduced Species/statistics & numerical data ; Pets/economics ; Vertebrates
Language	English
Publishing date	2021-03-22
Publishing country	United States
Document type	Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.2016337118
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Article ; Online: Climatic niche shifts in introduced species.

Bates, Olivia K / Bertelsmeier, Cleo

Current biology : CB

2021 Volume 31, Issue 19, Page(s) R1252–R1266

Abstract: Predictions of future biological invasions often rely on the assumption that introduced species establish only under climatic conditions similar to those in their native range. To date, 135 studies have tested this assumption of 'niche conservatism', ... ...

Abstract	Predictions of future biological invasions often rely on the assumption that introduced species establish only under climatic conditions similar to those in their native range. To date, 135 studies have tested this assumption of 'niche conservatism', yielding contradictory results. Here we revisit this literature, consider the evidence for niche shifts, critically assess the methods used, and discuss the authors' interpretations of niche shifts. We find that the true frequency of niche shifts remains unknown because of diverging interpretations of similar metrics, conceptual issues biasing conclusions towards niche conservatism, and the use of climatic data that may not be biologically meaningful. We argue that these issues could be largely addressed by focussing on trends or relative degrees of niche change instead of dichotomous classifications (shift versus no shift), consistently and transparently including non-analogous climates, and conducting experimental studies on mismatches between macroclimates and microclimates experienced by the study organism. Furthermore, an observed niche shift may result either from species filling a greater part of their fundamental niche during the invasion (a 'realised niche shift') or from rapid evolution of traits adapting species to novel climates in the introduced range (a 'fundamental niche shift'). Currently, there is no conclusive evidence distinguishing between these potential mechanisms of niche shifts. We outline how these questions may be addressed by combining computational analyses and experimental evidence.
MeSH term(s)	Ecosystem ; Introduced Species
Language	English
Publishing date	2021-10-12
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	1071731-6
ISSN	1879-0445 ; 0960-9822
ISSN (online)	1879-0445
ISSN	0960-9822
DOI	10.1016/j.cub.2021.08.035
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Article ; Online: The global risk of infectious disease emergence from giant land snail invasion and pet trade.

Gippet, Jérôme M W / Bates, Olivia K / Moulin, Jérémie / Bertelsmeier, Cleo

Parasites & vectors

2023 Volume 16, Issue 1, Page(s) 363

Abstract: Background: Pathogen outbreaks mostly originate from animals, but some species are more likely to trigger epidemics. The giant land snail (Lissachatina fulica) is a widespread invader, a popular exotic pet, and a notorious vector of the rat lungworm, ... ...

Abstract	Background: Pathogen outbreaks mostly originate from animals, but some species are more likely to trigger epidemics. The giant land snail (Lissachatina fulica) is a widespread invader, a popular exotic pet, and a notorious vector of the rat lungworm, causing eosinophilic meningitis in humans. However, a comprehensive assessment of the risks of disease outbreak associated with this species is lacking. Methods: We assessed and mapped the risk of disease transmission associated with the invasion and pet trade of L. fulica. First, we conducted a review of the scientific literature to list all known L. fulica parasites and pathogens and query host-pathogen databases to identify their potential mammalian hosts. Then, to assess the potential for L. fulica to spread globally, we modelled its suitable climatic conditions and tested whether, within climatically suitable areas, the species tended to occur near humans or not. Finally, we used social media data to map L. fulica possession as an exotic pet and to identify human behaviours associated with increased risk of disease transmission. Results: Lissachatina fulica can carry at least 36 pathogen species, including two-thirds that can infect humans. The global invasion of L. fulica is climatically limited to tropical areas, but the species is strongly associated with densely populated areas where snails are more likely to enter in contact with humans. In temperate countries, however, climatic conditions should prevent L. fulica's spread. However, we show that in Europe, giant snails are popular exotic pets and are often handled with direct skin contact, likely increasing the risk of pathogen transmission to their owners. Conclusions: It is urgent to raise public awareness of the health risks associated with L. fulica in both tropical countries and Europe and to regulate its trade and ownership internationally. Our results highlight the importance of accounting for multiple types of human-wildlife interactions when assessing risks of infectious disease emergence. Furthermore, by targeting the species most likely to spread pathogens, we show that it is possible to rapidly identify emerging disease risks on a global scale, thus guiding timely and appropriate responses.
MeSH term(s)	Humans ; Animals ; Rats ; Snails/parasitology ; Animals, Wild ; Angiostrongylus cantonensis ; Communicable Diseases ; Europe ; Mammals
Language	English
Publishing date	2023-10-17
Publishing country	England
Document type	Review ; Journal Article
ZDB-ID	2409480-8
ISSN	1756-3305 ; 1756-3305
ISSN (online)	1756-3305
ISSN	1756-3305
DOI	10.1186/s13071-023-06000-y
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Article: Bridgehead effects distort global flows of alien species

Bertelsmeier, Cleo / Ollier, Sébastien

Diversity & distributions. 2021 Nov., v. 27, no. 11

2021

Abstract: AIM: A major goal of invasion biology is to understand global species flows between donor and recipient regions. Our current view of such flows assumes that species are moved directly from their native to their introduced range. However, if introduced ... ...

Abstract	AIM: A major goal of invasion biology is to understand global species flows between donor and recipient regions. Our current view of such flows assumes that species are moved directly from their native to their introduced range. However, if introduced populations serve as bridgehead populations that generate additional introductions, tracing intercontinental flows between donor and recipient regions misrepresents the introduction history. Our aim was to assess to what extent bridgehead effects distort our view of global species flows. LOCATION: Global. METHODS: We separately mapped “flows” of 252 alien ant species established on one to six continents, representing a gradient of relatively certain to completely unreliable flows. To assess the importance of bridgehead effects in distorting our view of global species flows, we first quantified the proportion of cosmopolitan species per country. A high proportion of such species would indicate that exclusively mapped flows from the native range to these countries are unreliable. We then tested if the global flows obtained mapping species exotic in one continent to six continents differed and tested if these flows can be linked to global trade flows. RESULTS: In 83% of countries, more than 50% of alien ants were established on six continents, indicating that flows to these countries are unreliable. Flows of species established on a single continent were linked to global trade flows, while flows including cosmopolitan species were not linked to global trade. MAIN CONCLUSION: It is crucial to account for bridgehead effects when assessing the biogeography and intercontinental flows of alien species. This is urgent for improving our understanding of how species are moved around the planet.
Keywords	biogeography ; international trade ; introduced species
Language	English
Dates of publication	2021-11
Size	p. 2180-2189.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	2020139-4
ISSN	1472-4642 ; 1366-9516
ISSN (online)	1472-4642
ISSN	1366-9516
DOI	10.1111/ddi.13388
Database	NAL-Catalogue (AGRICOLA)

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