Coevolutionary transitions from antagonism to mutualism explained by the Co-Opted Antagonist Hypothesis

Johnson, Christopher; Smith, G.P.; Yule, Kelsey M.; Davidowitz, Goggy; Bronstein, Judith L.; Ferrière, Régis

doi:10.1038/s41467-021-23177-x

Cited by 23 publications

(17 citation statements)

References 41 publications

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“…This may have important implications for our understanding of evolutionary transitions in species interactions. Mutualism could originate from antagonistic interactions such as parasitism and predation if ancestral antagonists performed a beneficial function (e.g., pollination or seed dispersal) that changed the ecology of interactions (Johnson et al, 2021; Zhang et al, 2021). For instance, the changes in animal behaviour, diet and morphology can be associated with the loss of direct seed predation and the origins of seed dispersal mutualisms (Johnson et al, 2021; Weiblen & Treiber, 2015).…”

Section: Discussionmentioning

confidence: 99%

Evolutionary and ecological patterns of scatter‐ and larder‐hoarding behaviours in rodents

Zhang

et al. 2022

Ecology Letters

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Scatter‐ and larder hoarding are the primary strategies of food‐hoarding animals and have important implications for plant‐animal interactions and plant recruitment. However, their origins and influencing factors have not been fully investigated across a wide range of taxa. Our systematic literature search amassed data for 183 seed‐hoarding rodent species worldwide and tested relationships of seed‐hoarding behaviours with phylogenetic signal, functional traits and environmental factors. We found that the evolution of hoarding strategies was not random in phylogeny, and scatter hoarding originated independently multiple times from larder hoarding. Rodents with higher encephalisation quotient (relative brain size), omnivorous diet (related to dependence on seeds) and inhabiting lower latitudes were disproportionately likely to scatter hoard. Despite body mass’s potential relationship with competition through food defence, it was associated with food‐hoarding strategy only in a few families. Our results show the need to study the community and ecological context of food‐hoarding behaviours.

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Section: Discussionmentioning

confidence: 99%

Evolutionary and ecological patterns of scatter‐ and larder‐hoarding behaviours in rodents

Zhang

et al. 2022

Ecology Letters

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“…There are many possible paths that an endosymbiotic species could follow, such as from a facultative mutualist toward an obligate parasite, or an obligate parasite to a mutualist (the Co-opted Antagonist Hypothesis, Johnson et al, 2021). Their relative likelihoods and contributing factors could be investigated in a digital evolution system that supports de novo evolution of endosymbiosis.…”

Section: Open-ended Evolutionmentioning

confidence: 99%

Symbiosis in Digital Evolution: Past, Present, and Future

et al. 2021

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Symbiosis, the living together of unlike organisms as symbionts, is ubiquitous in the natural world. Symbioses occur within and across all scales of life, from microbial to macro-faunal systems. Further, the interactions between symbionts are multimodal in both strength and type, can span from parasitic to mutualistic within one partnership, and persist over generations. Studying the ecological and evolutionary dynamics of symbiosis in natural or laboratory systems poses a wide range of challenges, including the long time scales at which symbioses evolve de novo, the limited capacity to experimentally control symbiotic interactions, the weak resolution at which we can quantify interactions, and the idiosyncrasies of current model systems. These issues are especially challenging when seeking to understand the ecological effects and evolutionary pressures on and of a symbiosis, such as how a symbiosis may shift between parasitic and mutualistic modes and how that shift impacts the dynamics of the partner population. In digital evolution, populations of computational organisms compete, mutate, and evolve in a virtual environment. Digital evolution features perfect data tracking and allows for experimental manipulations that are impractical or impossible in natural systems. Furthermore, modern computational power allows experimenters to observe thousands of generations of evolution in minutes (as opposed to several months or years), which greatly expands the range of possible studies. As such, digital evolution is poised to become a keystone technique in our methodological repertoire for studying the ecological and evolutionary dynamics of symbioses. Here, we review how digital evolution has been used to study symbiosis, and we propose a series of open questions that digital evolution is well-positioned to answer.

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“…We address these outstanding questions using the Datura wrightii-Manduca sexta plant-pollinator mutualism as a model system 38,39 . Datura flowers present unusually high floral humidity (>30% ΔRH), exceeding levels previously reported for angiosperm flowers by a factor of 10.…”

Section: Introductionmentioning

confidence: 99%

Floral humidity as a signal – not a cue – in a nocturnal pollination system

Dahake

Jain

Vogt

et al. 2022

Preprint

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Although visual and olfactory floral signals attract pollinators from a distance, at the flower’s threshold, pollinators can use floral humidity as an index cue for nectar presence. We evaluate the role of floral humidity in the Datura wrightii-Manduca sexta nocturnal pollination system. In addition to our finding that M. sexta shows strong innate attraction toward humid flowers, we identify the hygrosensing sensillum on their antennae, demonstrate its extreme sensitivity to minute changes in RH, and observe the elimination of moths’ behavioral preference towards humid flowers following experimental occlusion of the sensilla. Despite Manduca’s attraction toward humid flowers, we find that floral humidity is not a reliable cue for nectar presence in this system. While Datura floral headspace sustains an enormous humidity gradient, it is not a consequence of nectar evaporation, but an outcome of gas exchange through floral stomata and is decoupled from nectar presence. Using interdisciplinary tools, we demonstrate the function of floral humidity as an attractive signal, not a cue, in this pollination system, thus showcasing an underappreciated modality by which flowers may manipulate their visitors.

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Coevolutionary transitions from antagonism to mutualism explained by the Co-Opted Antagonist Hypothesis

Cited by 23 publications

References 41 publications

Evolutionary and ecological patterns of scatter‐ and larder‐hoarding behaviours in rodents

Evolutionary and ecological patterns of scatter‐ and larder‐hoarding behaviours in rodents

Symbiosis in Digital Evolution: Past, Present, and Future

Floral humidity as a signal – not a cue – in a nocturnal pollination system

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