Increased rates of dispersal of free-ranging cane toads (Rhinella marina) during their global invasion

Shine, Richard; Alford, Ross A.; Blennerhasset, Ryan; Brown, Gregory P.; DeVore, Jayna L.; Ducatez, Simon; Finnerty, Patrick B.; Greenlees, Matthew J.; Kaiser, Shannon W.; McCann, Samantha; Pettit, Lachlan; Pizzatto, Lígia; Schwarzkopf, Lin; Ward‐Fear, Georgia; Phillips, Benjamin L.

doi:10.1038/s41598-021-02828-5

Cited by 19 publications

(24 citation statements)

References 58 publications

(76 reference statements)

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“…Both the range dynamics and the prevalence of highly mobile genotypes at the invasion front indicate an accelerated rate of range expansion of M. trilobatus in Europe. Such accelerated invasion has been demonstrated in cane toads, Rhinella marina , expanding in Australia (Phillips et al, 2010b; Shine et al, 2021; Urban et al, 2008). However, invasion dynamics in this species were heterogeneous on the regional scale and depended on the environmental factors determining dispersal behaviour (Urban et al, 2008).…”

Section: Discussionmentioning

confidence: 92%

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Accelerated invasion through the evolution of dispersal behaviour

Narimanov

Bauer

Bonte

et al. 2022

Global Ecol Biogeogr

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Aim The continuous spread of invasive species is attributed to demographic processes and high dispersal rates. Both can change and evolve during range expansion, eventually accelerating spread dynamics. Here, we document such an accelerated spread for one of the most invasive spiders in Europe, the dwarf spider Mermessus trilobatus, and test whether dispersal, reproduction or competitive ability is at the source of this pattern. Location Europe. Time period 1981–2021. Major taxon studied Mermessus trilobatus (Arachnida: Araneae: Linyphiidae). Methods First, we collected records from 21 countries across Europe to document the speed of progression of the invasion front over the last 40 years. Second, we collected live individuals from populations in the longest and more recently invaded areas and compared the dispersal propensity of offspring raised under standardized conditions. Third, we compared the reproduction and competitive ability of females derived from the populations of long‐invaded areas against areas with more recent establishment. Results The progression of the invaded range increased from about 150 km in the 1980s to some 400 km between 2010 and 2020. Dispersal‐related behaviour was nearly twice as frequent in offspring from invasion front populations compared to the core area. By contrast, we found no differences in reproduction or competitive ability among the studied populations. Further, neither joint inheritance nor trade‐offs of dispersal, reproduction or competitive ability were identified. Main conclusion As high dispersal is recessively inherited in M. trilobatus, our results suggest that the accelerated invasion is due to the accumulation of dispersive but not more reproductive or competitive genotypes in newly colonized areas. Given the high climatic amplitude of the species in North America, we expect it to spread over the remaining parts of Europe and large parts of Asia in the coming decades. Accelerated range expansion through the evolution of dispersal behaviour could play a role in numerous arthropod invasions worldwide.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 94%

Accelerated invasion through the evolution of dispersal behaviour

Narimanov

Bauer

Bonte

et al. 2022

Global Ecol Biogeogr

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“…At the same time, despite this is a parsimonious explanation of the observed pattern, it does not rule out a role also of environmental filtering exerted by island recurring conditions or other factors as well. For example, since dispersal-related of phenotypic traits might be affected by land-cover features (Shine et al, 2021;Brown et al, 2006), and vegetation patterns are plausibly relevant for a partially arboreal species like H. sarda, a comparative and retrospective analysis of the past and current vegetation coverage of the two islands Corsica and Elba could contribute to a better explanation the observed differentiation.…”

Section: Discussionmentioning

confidence: 99%

Evolution of personality and locomotory performance traits during a late Pleistocene island colonization in a tree frog

et al. 2022

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Recent empirical and theoretical studies suggest that personality and locomotory performance traits linked to dispersal abilities are crucial components of the dispersal syndromes, and that they can evolve during range expansions and colonization processes. Island colonization is one of the best characterised processes in dispersal biogeography, and its implication in the evolution of phenotypic traits has been investigated over a wide range of temporal scales. However, the effect of island colonization on personality and performance traits of natural populations, and how these traits could drive island colonization, has been little explored. Noteworthy, no studies have addressed these processes in the context of late-Pleistocene range expansions. Here, we investigated the contribution of island colonization s triggered by post-glacial range expansions to intraspecific variation in personality and locomotory performance traits. We compared boldness, exploration, jumping performance, and stickiness abilities, in populations from three equidistant areas of the Tyrrhenian tree frog Hyla sarda, two from the main island (Corsica Island) and one from the recently colonized island of Elba. Individuals from Elba were significantly bolder than individuals from Corsica, as they emerged sooner from a shelter (p=0.028), while individuals from Corsica showed markedly higher jumping and stickiness performance (both p<0.001), resulting as more performant than those of Elba. We discuss these results in the context of the major microevolutionary processes at play during range expansion, including selection, spatial sorting, founder effects and their possible interaction with local adaptation processes.

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“…Like runners in a foot race, more dispersive individuals are expected to be found further from an area of origin compared to their less dispersive counterparts (Figure 1). This can reflect the contributions of a host of traits impacting dispersal, such as longer limb length, higher movement rate (Courant et al, 2019; Phillips et al, 2006), greater stamina (Llewelyn et al, 2010), higher wing aspect ratio (Hassall et al, 2009), increased flight muscle ratio (Therry et al, 2014), and a greater tendency to explore novel habitats (Liebl & Martin, 2012) and move further distances with each displacement (Shine et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Does spatial sorting explain leading edge personality types in a spider’s non‐native range?

Chuang

Riechert

2022

Ethology

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Expanding populations are often characterized by phenotypic shifts across the range. Processes like spatial sorting predict that phenotypes may be distributed along a range based on dispersal ability, where the most dispersive individuals are found at the leading edges and the least dispersive remain at the population core. Thus, traits correlated to dispersal may also become spatially distributed in the same pattern. Cyrtophora citricola is an orb‐web spider with two expanding populations originating from the same core in its non‐native Florida range. Since spiders at the leading edges were previously found to differ in various personality traits from those at the core, we measured dispersal latency and likelihood in laboratory‐raised spiderlings to determine whether spatial sorting can account for these patterns. Only one of the two populations showed evidence of spatial sorting, suggesting this phenomenon is likely context dependent and is not always generalizable to expanding populations. Spiders from the leading edge of the eastern population were more dispersive than those at the core, although western spiders were the least dispersive of the three populations. Dispersal likelihood was correlated with the activity and exploratory tendencies of individuals. Population‐level differences we had previously observed for foraging aggression and activity were not found in the captive‐raised spiders, suggesting that they represent plastic responses to environmental conditions instead of being a result of dispersal‐correlated trait evolution. However, mean population‐level differences in exploration and boldness were maintained in captivity, suggesting that these behaviors have a heritable component. Overall, the eastern spiders were characterized as being bolder, whereas the western spiders were the least bold and exploratory. While this study provides evidence of spatial sorting of more dispersive, exploratory, and active individuals in the eastern population, the divergence in risk‐taking behaviors between the two populations highlights the potential context dependency in spatial sorting and the importance of understanding the interactions between natural and spatial selection.

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Increased rates of dispersal of free-ranging cane toads (Rhinella marina) during their global invasion

Cited by 19 publications

References 58 publications

Accelerated invasion through the evolution of dispersal behaviour

Accelerated invasion through the evolution of dispersal behaviour

Evolution of personality and locomotory performance traits during a late Pleistocene island colonization in a tree frog

Does spatial sorting explain leading edge personality types in a spider’s non‐native range?

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