Intraspecific Adaptation Load: A Mechanism for Species Coexistence

Yamamichi, Masato; Kyogoku, Daisuke; Iritani, Ryosuke; Kobayashi, Keiko; Takahashi, Yuma; Tsurui-Sato, Kaori; Yamawo, Akira; Dobata, Shigeto; Tsuji, Kazuki; Kondo, Michio

doi:10.1016/j.tree.2020.05.011

Cited by 29 publications

(45 citation statements)

References 65 publications

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“…This result illustrates that sexual conflict and the competition between different types of males can lead to a 'tragedy of the commons', in concordance with empirical [47,48] and theoretical work [12,49]. A recent review [50] proposed the overarching term 'intraspecific adaptation load', which captures the competition and conflicts in our model and more general causes of conflicts with conspecifics (e.g. due to kin selection) at the expense of population fitness.…”

Section: Discussionsupporting

confidence: 83%

Coevolution of female fidelity and male help in populations with alternative reproductive tactics

Морозов

Goymann

2021

Proc. R. Soc. B.

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In socially monogamous species, pair-bonded males often continue to provide care to all offspring in their nests despite some degree of paternity loss due to female extra-pair copulation. Previous theoretical models suggested that females can use their within-pair offspring as ‘hostages' to blackmail their social mates, so that they continue to provide care to the brood at low levels of cuckoldry. These models, however, rely on the assumption of sufficiently accurate male detection of cuckoldry and the reduction of parental effort in case of suspicion. Therefore, they cannot explain the abundant cases where cuckolded males continue to provide extensive care to the brood. Here we use an analytical population genetics model and an individual-based simulation model to explore the coevolution of female fidelity and male help in populations with two genetically determined alternative reproductive tactics (ARTs): sneakers that achieve paternity solely via extra-pair copulations and bourgeois that form a mating pair and spend some efforts in brood care. We show that when the efficiency of mate guarding is intermediate, the bourgeois males can evolve to ‘specialize' in providing care by spending more than 90% of time in helping their females while guarding them as much as possible, despite frequent cuckoldry by the sneakers. We also show that when sneakers have tactic-specific adaptations and thus are more competitive than the bourgeois in gaining extra-pair fertilizations, the frequency of sneakers and the degrees of female fidelity and male help can fluctuate in evolutionary cycles. Our theoretical predictions highlight the need for further empirical tests in species with ARTs.

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Section: Discussionsupporting

confidence: 83%

Coevolution of female fidelity and male help in populations with alternative reproductive tactics

Морозов

Goymann

2021

Proc. R. Soc. B.

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“…With increasing evidence for rapid contemporary evolution on ecological timescales (Hendry 2016), an interest in developing a broader theory of species coexistence that incorporates rapid evolution and eco-evolutionary feedbacks has grown (Tachikawa 2008; Kremer & Klausmeier 2013; Wittmann & Fukami 2018; Hart et al 2019; van Velzen 2020; Yamamichi et al 2020). By allowing for rapid evolution in mechanistic resource competition models, we have identified a new solution to the paradox of the plankton, deriving from relative nonlinearity of competition.…”

Section: Resultsmentioning

confidence: 99%

“…A wealth of empirical evidence has accumulated over the last few decades indicating that rapid contemporary evolution on ecological timescales (Hendry 2016) can be essential for understanding population dynamics (Yoshida et al 2003; Bell 2017). More recently, evidence has begun to emerge that rapid evolution can also be a significant driver of community dynamics amongst competing species, and in particular play an important role in regulating species coexistence (Lankau 2011; Vasseur et al 2011; Mougi 2013; Hiltunen et al 2017; Wittmann & Fukami 2018; Hart et al 2019; Germain et al 2020; van Velzen 2020; Yamamichi et al 2020). To date, however, rapid evolution has only been shown to promote species coexistence when there is either a trade-off between traits optimal for intraspecific and interspecific competition (Lankau 2011; Vasseur et al 2011; Mougi 2013; Wittmann & Fukami 2018; Yamamichi et al 2020) or fine-tuning of prey defenses and predator foraging efforts (Kondoh 2003; van Velzen 2020).…”

Section: Introductionmentioning

confidence: 99%

“…With increasing evidence for rapid contemporary evolution on ecological timescales 1 , there has been an interest in developing a broader theory of species coexistence that incorporates rapid evolution [8][9][10]12 . By allowing for rapid evolution in mechanistic resource competition models, we have identified a new mechanism by which relative nonlinearity of competition promotes coexistence.…”

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confidence: 99%

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Rapid evolution promotes fluctuation-dependent species coexistence

Yamamichi

Letten

2020

Preprint

Self Cite

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Recent studies have demonstrated that rapid contemporary evolution can play a significant role in regulating population dynamics on ecological timescales. Here we identify a previously unrecognized mechanism by which rapid evolution promotes species coexistence via temporal fluctuations and a trade-off between competitive ability and the speed of adaptive evolution. This is a special case of relative nonlinearity in coexistence theory, and given the propensity for both oscillatory dynamics and divergent rates of adaptation in the real world, we propose that this mechanism may operate widely in nature.

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“…Intraspecific reproductive interactions between the sexes, such as male mating harassment and the resulting sexual conflict, can reduce female fitness and decrease population growth rate (23)(24)(25)(26). Because male mating harassment and its fitness consequences for females is expected to be more intense when a species is common (23,(27)(28)(29)(30), sexual conflict can in theory, promote local species coexistence (19,20,31,32).…”

Section: Introductionmentioning

confidence: 99%

Sexual conflict promotes species coexistence through negative frequency dependence

Gómez‐Llano

Nilén

Moodie

et al. 2021

Preprint

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A major challenge in community ecology is to understand the mechanisms promoting stable local coexistence. A necessary feature of local coexistence is that species show negative frequency dependence, rescuing rare species from exclusion. However, most studies have focused on ecological differences driving negative frequency dependence, ignoring non-ecological mechanisms such as reproductive interactions. Here, we combined field studies with behavioural and mesocosm experiments to investigate how reproductive interactions within and between species promote coexistence. Our results indicate that the intensity of male mating harassment and sexual conflict increases as species become more common, reducing female productivity and leading to negative frequency dependence. Moreover, field surveys reveal that negative frequency dependence operates in natural settings, consistent with our experimental results. These results suggest that sexual conflict can promote local coexistence and highlights the importance of studying reproductive interactions together with ecological differences to better understand the mechanisms promoting species coexistence.

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Intraspecific Adaptation Load: A Mechanism for Species Coexistence

Cited by 29 publications

References 65 publications

Coevolution of female fidelity and male help in populations with alternative reproductive tactics

Coevolution of female fidelity and male help in populations with alternative reproductive tactics

Rapid evolution promotes fluctuation-dependent species coexistence

Sexual conflict promotes species coexistence through negative frequency dependence

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