Human-mediated dispersal in insects

Gippet, Jérôme M. W.; Liebhold, Andrew M.; Fenn‐Moltu, Gyda; Bertelsmeier, Cléo

doi:10.1016/j.cois.2019.07.005

Cited by 107 publications

(91 citation statements)

References 78 publications

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“…With ongoing globalisation, the frequency of species introductions has increased from year to year on a global scale [12]. Human-mediated dispersal is influenced by the likelihood and frequency for a certain species to infiltrate human transport and arrive alive and able to reproduce, which depends on several factors: population size, nesting behavior, biotic interactions and phenology [62][63][64][65][66]. In the case of M. sculpturalis, only long-distance transportation can explain its invasion [26,67].…”

Section: Discussionmentioning

confidence: 99%

Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe

Lanner

Gstöttenmayer²,

Curto

et al. 2021

BMC Ecol Evo

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Background Invasive species are increasingly driving biodiversity decline, and knowledge of colonization dynamics, including both drivers and dispersal modes, are important to prevent future invasions. The bee species Megachile sculpturalis (Hymenoptera: Megachilidae), native to East-Asia, was first recognized in Southeast-France in 2008, and has since spread throughout much of Europe. The spread is very fast, and colonization may result from multiple fronts. Result To track the history of this invasion, codominant markers were genotyped using Illumina sequencing and the invasion history and degree of connectivity between populations across the European invasion axis were investigated. Distinctive genetic clusters were detected with east–west differentiations in Middle-Europe. Conclusion We hypothesize that the observed cluster formation resulted from multiple, independent introductions of the species to the European continent. This study draws a first picture of an early invasion stage of this wild bee and forms a foundation for further investigations, including studies of the species in their native Asian range and in the invaded range in North America.

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Section: Discussionmentioning

confidence: 99%

Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe

Lanner

Gstöttenmayer²,

Curto

et al. 2021

BMC Ecol Evo

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“…There is growing evidence for the impacts of HMD on species’ spatial dynamics (Bullock et al , Gippet et al ). Our focus here has been on humans acting as dispersal vectors, and we have shown how metapopulation models can be used to explore explicitly the impacts of dispersal by humans.…”

Section: Discussionmentioning

confidence: 99%

Human‐mediated dispersal and disturbance shape the metapopulation dynamics of a long‐lived herb

Bullock

Wichmann

Hails

et al. 2020

Ecology

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As anthropogenic impacts on the natural world escalate, there is increasing interest in the role of humans in dispersing seeds. But the consequences of this Human-Mediated Dispersal (HMD) on plant spatial dynamics are little studied. In this paper, we ask how secondary dispersal by HMD affects the dynamics of a natural plant metapopulation. In addition to dispersal between patches, we suggest within-patch processes can be critical. To address this, we assess how variation in local population dynamics, caused by small-scale disturbances, affects metapopulation size. We created an empirically based model with stochastic population dynamics and dispersal among patches, which represented a real-world, cliff-top metapopulation of wild cabbage Brassica oleracea. We collected demographic data from multiple populations by tagging plants over eight years. We assessed seed survival, and establishment and survival of seedlings in intact vegetation vs. small disturbances. We modeled primary dispersal by wind using field data and used experimental data on secondary HMD by hikers. We monitored occupancy patterns over a 14-yr period in the real metapopulation. Disturbance had large effects on local population growth rates, by increasing seedling establishment and survival. This meant that the modeled metapopulation grew in size only when the area disturbed in each patch was above 35%. In these growing metapopulations, although only 0.2% of seeds underwent HMD, this greatly enhanced metapopulation growth rates. Similarly, HMD allowed more colonizations in declining metapopulations under low disturbance, and this slowed the rate of decline. The real metapopulation showed patterns of varying patch occupancy over the survey years, which were related to habitat quality, but also positively to human activity along the cliffs, hinting at beneficial effects of humans. These findings illustrate that realistic changes to dispersal or demography, specifically by humans, can have fundamental effects on the viability of a species at the landscape scale.

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“…The existence of long-distance dispersal coupled with localized dispersal was described as "stratified dispersal" by Hengeveld (1989) who noted that such a phenomenon is common in invading populations. Often, localized dispersal is caused by natural movement of organisms while long-distance dispersal is typically the result of anthropogenic movement of organisms, though human-mediated dispersal can contribute to both long-and short distance dispersal (Wilson et al 2009;Gippet et al 2019). Such coupling of long-and shortdistance dispersal driving invasion spread has been observed in a variety of organisms ranging from plants to insects (Suarez et al 2001;Trakhtenbrot et al 2005;Pyšek et al 2008;Lockwood et al 2013).…”

Section: Stratified Dispersalmentioning

confidence: 99%

Scale invariance in the spatial-dynamics of biological invasions

Liebhold¹,

Keitt²,

Goel³

et al. 2020

Self Cite

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Despite the enormous negative consequences of biological invasions, we have a limited understanding of how spatial demography during invasions creates population patterns observed at different spatial scales. Early stages of invasions, arrival and establishment, are considered distinct from the later stage of spread, but the processes of population growth and dispersal underlie all invasion phases. Here, we argue that the spread of invading species, to a first approximation, exhibits scale invariant spatial-dynamic patterns that transcend multiple spatial scales. Dispersal from a source population creates smaller satellite colonies, which in turn act as sources for secondary invasions; the scale invariant pattern of coalescing colonies can be seen at multiple scales. This self-similar pattern is referred to as “stratified diffusion” at landscape scales and the “bridgehead effect” at the global scale. The extent to which invasions exhibit such scale-invariant spatial dynamics may be limited by the form of the organisms’ dispersal kernel and by the connectivity of the habitat. Recognition of this self-similar pattern suggests that certain concepts for understanding and managing invasions might be widely transferable across spatial scales.

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Human-mediated dispersal in insects

Cited by 107 publications

References 78 publications

Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe

Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe

Human‐mediated dispersal and disturbance shape the metapopulation dynamics of a long‐lived herb

Scale invariance in the spatial-dynamics of biological invasions

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