Heterospecific mating interactions as an interface between ecology and evolution

Kyogoku, Daisuke; Wheatcroft, David

doi:10.1111/jeb.13687

Cited by 29 publications

(24 citation statements)

References 170 publications

(235 reference statements)

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“…If reinforcement due to maladaptive hybridization would have been a prominent force in sympatric populations, we would expect traits to be more divergent between the host races in sympatry compared to allopatry, i.e. for character displacement to arise (Comeault et al, 2016, Calabrese & Pfennig, 2020, Kyogoku & Wheatcroft, 2020; Figure 1B-C). This was generally not the case.…”

Section: Discussionmentioning

confidence: 99%

Non-parallel morphological divergence following colonization of a new host plant

Ortega

Friberg

et al. 2021

Preprint

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Divergent ecological selection may diversify populations of the same species evolving in different niches. However, for adaptation to result in speciation, the ecologically divergent populations have to experience at least some degree of reproductive isolation. While ecological selection pressures in similar environments are expected to result in convergent adaptation, sexually selected traits may diverge in different directions in different locations. Here, we use a host shift in the phytophagous peacock fly Tephritis conura, with both host races represented in two geographically separate areas, East and West of the Baltic Sea, to investigate convergence in morphological adaptations. We asked i) if there are consistent morphological adaptations to a host plant shift and ii) if the adaptations to secondary sympatry with the alternate host race are consistent across contact zones. We found low, albeit significant, divergence between host races, but only a few traits, including the female ovipositor, were consistently different. Interestingly, co-existence with the other host race significantly increased the degree of morphological divergence, but the patterns of divergence were not consistent across the two sympatric contact zones. Thus, local stochastic fixation or reinforcement could generate trait divergence, and evidence from additional sources is hence needed to conclude whether divergence is adaptive.

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Section: Discussionmentioning

confidence: 99%

Non-parallel morphological divergence following colonization of a new host plant

Ortega

Friberg

et al. 2021

Preprint

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“…By simulating eco-evolutionary models, we revealed that rapid evolution can prevent extinction of initially rare species by ecological and reproductive character displacement. Therefore, character displacement can be a special case of evolutionary rescue, where adaptation to interspecific interactions prevents extinction (Yamaguchi and Iwasa 2013, Bell 2017, Kyogoku and Wheatcroft 2020). In addition, we showed that the magnitude of genetic variance is more important in reproductive character displacement due to positive frequency-dependence (Figures 1-4).…”

Section: Discussionmentioning

confidence: 99%

“…processes are dynamically interacting on the same timescales (Dayan and Simberloff 2005, Stuart and Losos 2013, Kyogoku and Wheatcroft 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Character displacement, in which sympatric populations show trait divergence for reducing negative interspecific interactions (Brown and Wilson 1956, Grant 1972, Pfennig and Pfennig 2009, Pfennig and Pfennig 2020), is a classical topic in ecology and evolutionary biology for understanding resource partitioning, species coexistence, reinforcement, and speciation (Schluter 2000, Dayan and Simberloff 2005, Stuart and Losos 2013, Germain et al 2018). While previous studies tended to focus on trait divergence and convergence as an outcome of long-term evolution (Lawlor and Maynard Smith 1976, Slatkin 1980, Taper and Case 1985, Abrams 1986, Doebeli 1996, Goldberg and Lande 2006, Konuma and Chiba 2007, Abrams and Cortez 2015), recent studies suggest that character displacement can be driven by rapid evolution (Grant and Grant 2006, Stuart and Losos 2013) and be a special case of evolutionary rescue (Bell 2017), where rapid evolution prevents population extinction by weakening negative interspecific interactions (Yamaguchi and Iwasa 2013, Kyogoku and Wheatcroft 2020). These days it is increasingly becoming clear that adaptive evolution can be rapid enough to affect various ecological dynamics (Hairston et al 2005, Schoener 2011, Hendry 2016), and hence it is crucial to consider eco-evolutionary dynamics of character displacement where ecological and evolutionary processes are dynamically interacting on the same timescales (Dayan and Simberloff 2005, Stuart and Losos 2013, Kyogoku and Wheatcroft 2020).…”

Section: Introductionmentioning

confidence: 99%

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How does the magnitude of genetic variation affect eco-evolutionary dynamics in character displacement?

Morita

Yamamichi

2021

Preprint

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While previous studies on character displacement tended to focus on trait divergence and convergence as a result of long-term evolution, recent studies suggest that character displacement can be a special case of evolutionary rescue, where rapid evolution prevents population extinction by weakening negative interspecific interactions. When the magnitude of genetic variation is small, however, the speed of trait divergence can be slow and populations may go extinct before the completion of character displacement. Here we analyzed a simple model to examine how the magnitude of genetic variation affects evolutionary rescue via ecological and reproductive character displacement that weakens resource competition and reproductive interference, respectively. We found that the large additive genetic variance is more important for preventing extinction in reproductive character displacement than in ecological character displacement. This is because reproductive interference produces a locally stable coexistence equilibrium with positive frequency-dependence (i.e., minority disadvantage) whereas ecological character displacement results in a globally stable coexistence equilibrium. Furthermore, population extinction becomes less likely when ecological and reproductive character displacement occur simultaneously due to positive covariance between ecological and reproductive traits. Our results suggest that while reproductive character displacement may be rarer than ecological character displacement, it is more likely to occur when there exists positive trait covariance, such as the case of a magic trait in reinforcement of speciation processes.

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“…Reproductive interference occurs when closely related species with similar reproductive traits interact during reproduction, reducing the fitness of either or both species. Reproductive interference can drive population dynamics and/or evolutionary change (Gröning and Hochkirch, 2008; Burdfield‐Steel and Shuker, 2011; Kyogoku, 2015; Kyogoku and Wheatcroft, 2020). Strong effects of reproductive interference are especially likely during secondary contact, including biological invasions (Kyogoku, 2020).…”

Section: Introductionmentioning

confidence: 99%

Pollination from invasive dandelions is unlikely to reduce seed production in the native Japanese dandelion, Taraxacum japonicum

Kyogoku

2020

Weed Research

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Reproductive interference occurs when closely related species interact reproductively, affecting the fitness of either or both species. Understanding the mechanisms by which reproductive interference reduces fitness can be crucial for effective management and the interpretation of the functional significance of traits. Invasive apomictic dandelions reproductively interfere with the seed production of Taraxacum japonicum, a sexual species native to part of the Japanese archipelago. The simultaneous deposition of both apomictic and conspecific pollen on the stigma of T. japonicum has been hypothesised to lead to interspecific fertilisation, producing empty seeds. However, experimental results appear to vary across studies. The invasive apomict is often assumed to be T. officinale, but other apomicts are morphologically similar to T. officinale, and only some may reproductively interfere with T. japonicum. Here, hand pollination experiments were performed using potted plants to control the identities of apomictic dandelions. No evidence was found for a negative effect of apomictic pollen on T. japonicum. Based on my experimental results and the review of relevant previous studies, I concluded that the simultaneous deposition of apomictic and conspecific pollen likely leads to a normal level of seed production in T. japonicum, suggesting that mechanisms other than interspecific pollen competition for fertilisation underlie reproductive interference by apomictic dandelions on T. japonicum.

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Heterospecific mating interactions as an interface between ecology and evolution

Cited by 29 publications

References 170 publications

Non-parallel morphological divergence following colonization of a new host plant

Non-parallel morphological divergence following colonization of a new host plant

How does the magnitude of genetic variation affect eco-evolutionary dynamics in character displacement?

Pollination from invasive dandelions is unlikely to reduce seed production in the native Japanese dandelion, Taraxacum japonicum

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