S. Bettinazzi, Jane Liang, E. Rodriguez, Marion Bonneau, R. Holt, B. Whitehead, D. Dowling, Nick Lane, M. Camus
{"title":"Assessing the role of mitonuclear interactions on mitochondrial function and organismal fitness in natural Drosophila populations","authors":"S. Bettinazzi, Jane Liang, E. Rodriguez, Marion Bonneau, R. Holt, B. Whitehead, D. Dowling, Nick Lane, M. Camus","doi":"10.1093/evlett/qrae043","DOIUrl":"https://doi.org/10.1093/evlett/qrae043","url":null,"abstract":"\u0000 Mitochondrial function depends on the effective interactions between proteins and RNA encoded by the mitochondrial and nuclear genomes. Evidence suggests that both genomes respond to thermal selection and promote adaptation. However, the contribution of their epistatic interactions to life history phenotypes in the wild remains elusive. We investigated the evolutionary implications of mitonuclear interactions in a real-world scenario that sees populations adapted to different environments, altering their geographical distribution while experiencing flow and admixture. We created a Drosophila melanogaster panel with replicate native populations from the ends of the Australian east-coast cline, into which we substituted the mtDNA haplotypes that were either predominant or rare at each cline-end, thus creating putatively mitonuclear matched and mismatched populations. Our results suggest that mismatching may impact phenotype, with populations harboring the rarer mtDNA haplotype suffering a trade-off between aerobic capacity and key fitness aspects such as reproduction, growth, and survival. We discuss the significance of mitonuclear interactions as modulators of life history phenotypes in the context of future adaptation and population persistence.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Devon A. DeRaad, Alexandra N Files, L. Decicco, Rene P Martin, J. McCullough, Piokera S. Holland, D. Pikacha, Ikuo G. Tigulu, D. Boseto, T. Lavery, Michael J Andersen, R. Moyle
{"title":"Genomic patterns in the dwarf kingfishers of northern Melanesia reveal a mechanistic framework explaining the paradox of the great speciators","authors":"Devon A. DeRaad, Alexandra N Files, L. Decicco, Rene P Martin, J. McCullough, Piokera S. Holland, D. Pikacha, Ikuo G. Tigulu, D. Boseto, T. Lavery, Michael J Andersen, R. Moyle","doi":"10.1093/evlett/qrae035","DOIUrl":"https://doi.org/10.1093/evlett/qrae035","url":null,"abstract":"\u0000 The paradox of the great speciators describes a contradictory biogeographic pattern exhibited by numerous avian lineages in Oceania. Specifically, these lineages display broad geographic distributions across the region, implying strong over-water dispersal capabilities; yet, they also display repeated genetic and phenotypic divergence—even between geographically proximate islands—implying poor inter-island dispersal capabilities. One group originally cited as evidence for this paradox is the dwarf kingfishers of the genus Ceyx. Here, using genomic sequencing and comprehensive geographic sampling of the monophyletic Ceyx radiation from northern Melanesia, we find repeated, deep genetic divergence and no evidence for gene flow between lineages found on geographically proximate islands, providing an exceptionally clear example of the paradox of the great speciators. A dated phylogenetic reconstruction suggests a significant burst of diversification occurred rapidly after reaching northern Melanesia, between 3.9 and 2.9 MYA. This pattern supports a shift in net diversification rate, concordant with the expectations of the “colonization cycle” hypothesis, which implies a historical shift in dispersiveness among great speciator lineages during the evolutionary past. Here, we present a formalized framework that explains how repeated founder effects and shifting selection pressures on highly dispersive genotypes are the only ultimate causes needed to generate the paradox of the great speciators. Within this framework, we emphasize that lineage-specific traits and island-specific abiotic factors will result in varying levels of selection pressure against dispersiveness, caused by varying proximate eco-evolutionary mechanisms. Overall, we highlight how understanding patterns of diversification in the Ceyx dwarf kingfishers helped us generate a cohesive framework that provides a rigorous mechanistic explanation for patterns concordant with the paradox of the great speciators and the repeated emergence of geographic radiations in island archipelagoes across the globe.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141799329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chang S. Han, Diana A Robledo-Ruiz, Francisco Garcia-Gonzalez, Niels J Dingemanse, C. Tuni
{"title":"Unraveling mate choice evolution through indirect genetic effects","authors":"Chang S. Han, Diana A Robledo-Ruiz, Francisco Garcia-Gonzalez, Niels J Dingemanse, C. Tuni","doi":"10.1093/evlett/qrae037","DOIUrl":"https://doi.org/10.1093/evlett/qrae037","url":null,"abstract":"\u0000 Attractiveness is not solely determined by a single sexual trait but rather by a combination of traits. Because the response of the chooser is based on the combination of sexual traits in the courter, variation in the chooser’s responses that are attributable to the opposite-sex courter genotypes (i.e., the indirect genetic effects [IGEs] on chooser response) can reflect genetic variation in overall attractiveness. This genetic variation can be associated with the genetic basis of other traits in both the chooser and the courter. Investigating this complex genetic architecture, including IGEs, can enhance our understanding of the evolution of mate choice. In the present study on the field cricket Gryllus bimaculatus, we estimated (1) genetic variation in overall attractiveness and (2) genetic correlations between overall attractiveness and other pre- and postcopulatory traits (e.g., male latency to sing, female latency to mount, male guarding intensity, male and female body mass, male mandible size, and testis size) within and between sexes. We revealed a genetic basis for attractiveness in both males and females. Furthermore, a genetic variance associated with female attractiveness was correlated with a genetic variance underlying larger male testes. Our findings imply that males that mate with attractive females can produce offspring that are successful in terms of precopulatory sexual selection (daughters who are attractive) and postcopulatory sexual selection (sons with an advantage in sperm competition), potentially leading to runaway sexual selection. Our study exemplifies how the incorporation of the IGE framework provides novel insights into the evolution of mate choice.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Suetsugu, Shun K. Hirota, Masayuki Ishibashi, Kenya Ishida, Hiroshi Hayakawa, Y. Suyama
{"title":"Insular environment-dependent introgression from an arid-grassland orchid to a wetland orchid on an oceanic island","authors":"K. Suetsugu, Shun K. Hirota, Masayuki Ishibashi, Kenya Ishida, Hiroshi Hayakawa, Y. Suyama","doi":"10.1093/evlett/qrae034","DOIUrl":"https://doi.org/10.1093/evlett/qrae034","url":null,"abstract":"\u0000 Adaptive introgression plays a vital role in allowing recipient species to adapt and colonize new environments. However, our understanding of such environment-dependent introgressions is primarily limited to specific plant taxa in particular settings. In Japan, two related orchid species, the autonomously self-pollinating Pogonia minor and the outcrossing Pogonia japonica, typically inhabit dry grasslands and wetlands, respectively. Intriguingly, an island ecotype of P. japonica exists in arid, wind-swept, open sites on volcanic mountain slopes on Kozu Island, in the oceanic Izu Islands. To investigate potential introgression and its implications between P. japonica and P. minor on Kozu Island, we applied a comprehensive approach that included examining morphological traits, genome-wide SNP data, and plastid DNA sequences. We also examined the breeding systems of these species on Kozu Island through artificial pollination experiments to determine if introgression from P. minor has endowed the P. japonica ecotype with selfing capabilities. Extensive sampling on Kozu Island revealed that all P. japonica specimens exhibit signs of introgression from P. minor, suggesting the absence of pure P. japonica populations on the island. Furthermore, the chloroplast haplotypes of the insular P. japonica ecotype consistently match those of P. minor, indicating a predominantly asymmetrical initial hybridization with P. minor acting mainly as the maternal parent in the formation of F1 hybrids. Despite the advantages of self-fertilization in isolated environments, the insular P. japonica does not exhibit autogamy. Consequently, the scarcity of moist habitats, rather than selection pressure for selfing, likely contributes to the observed widespread introgression. Our study strongly suggests that the arid-environment-adapted P. minor has introgressed into the insular ecotype of P. japonica, enabling its successful colonization of arid volcanic mountain slopes of the oceanic island.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chay Halliwell, Andrew P. Beckerman, Samantha C Patrick, Ben J Hatchwell
{"title":"Coordination of care reduces conflict and predation risk in a cooperatively breeding bird","authors":"Chay Halliwell, Andrew P. Beckerman, Samantha C Patrick, Ben J Hatchwell","doi":"10.1093/evlett/qrae031","DOIUrl":"https://doi.org/10.1093/evlett/qrae031","url":null,"abstract":"\u0000 When two or more individuals cooperate to provision a shared brood, each carer may be able to maximize their payoffs by coordinating provisioning in relation to what others are doing. This investment “game” is not simply a matter of how much to invest but also of the relative timing of investment. Recent studies propose that temporal coordination of care in the forms of alternation (i.e., turn-taking) and synchrony (i.e., provisioning together) function to mitigate conflict between carers and reduce brood predation risk, respectively. Such coordination is widespread in biparental and cooperatively breeding birds, yet the fitness consequences have rarely been empirically tested. Here, we use a long-term study of long-tailed tits Aegithalos caudatus, a facultative cooperatively breeding bird with active coordination of care, to assess the support for these hypothesized functions for coordination of provisioning visits. First, we found evidence that turn-taking mitigates conflict between carers because, in cooperative groups, provisioning rates and offspring recruitment increased with the level of active alternation exhibited by carers and with the associated increase in provisioning rate parity between carers. In contrast, offspring recruitment did not increase with alternation in biparental nests, although it was positively correlated with parity of provisioning between carers, which is predicted to result from conflict mitigation. Second, synchronous nest visits were associated with a reduced probability of nest predation and thus increased brood survival, especially when provisioning rates were high. We attribute this effect to synchrony reducing carer activity near the nest. We conclude that temporal coordination of provisioning visits in the forms of alternation and synchrony both confer fitness benefits on carers and despite being intrinsically linked, these different kinds of coordination appear to serve different functions.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141651312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kévin Le Verger, Laurelle C Küng, Anne‐Claire Fabre, T. Schmelzle, Alexandra Wegmann, M. Sánchez-Villagra
{"title":"Goldfish phenomics reveals commonalities and a lack of universality in the domestication process for ornamentation","authors":"Kévin Le Verger, Laurelle C Küng, Anne‐Claire Fabre, T. Schmelzle, Alexandra Wegmann, M. Sánchez-Villagra","doi":"10.1093/evlett/qrae032","DOIUrl":"https://doi.org/10.1093/evlett/qrae032","url":null,"abstract":"\u0000 Domestication process effects are manifold, affecting genotype and phenotype, and assumed to be universal in animals by part of the scientific community. While mammals and birds have been thoroughly investigated, from taming to intensive selective breeding, fish domestication remains comparatively unstudied. The most widely bred and traded ornamental fish species worldwide, the goldfish, underwent the effect of long-term artificial selection on differing skeletal and soft tissue modules through ornamental domestication. Here, we provide a global morphological analysis in this emblematic ornamental domesticated fish. We demonstrate that goldfish exhibit unique morphological innovations in whole-body, cranial, and sensory (Weberian ossicles and brain) anatomy compared to their evolutionary clade, highlighting a remarkable morphological disparity within a single species comparable to that of a macroevolutionary radiation. In goldfish, as in the case of dogs and pigeons in their respective evolutionary contexts, the most ornamented varieties are extremes in the occupied morphological space, emphasizing the power of artificial selection for nonadaptive traits. Using 21st century tools on a dataset comprising the 16 main goldfish breeds, 23 wild close relatives, and 39 cypriniform species, we show that Charles Darwin’s expressed wonder at the goldfish is justified. There is a commonality of overall pattern in the morphological differentiation of domesticated forms selected for ornamental purposes, but the singularity of goldfish occupation and extension within (phylo)morphospaces, speaks against a universality in the domestication process.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The link between gene duplication and divergent patterns of gene expression across a complex life cycle","authors":"James G. DuBose, J. D. de Roode","doi":"10.1093/evlett/qrae028","DOIUrl":"https://doi.org/10.1093/evlett/qrae028","url":null,"abstract":"\u0000 The diversification of many lineages throughout natural history has frequently been associated with evolutionary changes in life cycle complexity. However, our understanding of the processes that facilitate differentiation in the morphologies and functions expressed by organisms throughout their life cycles is limited. Theory suggests that the expression of traits is decoupled across life stages, thus allowing for their evolutionary independence. Although trait decoupling between stages is well established, explanations of how said decoupling evolves have seldom been considered. Because the different phenotypes expressed by organisms throughout their life cycles are coded for by the same genome, trait decoupling must be mediated through divergence in gene expression between stages. Gene duplication has been identified as an important mechanism that enables divergence in gene function and expression between cells and tissues. Because stage transitions across life cycles require changes in tissue types and functions, we investigated the potential link between gene duplication and expression divergence between life stages. To explore this idea, we examined the temporal changes in gene expression across the monarch butterfly (Danaus plexippus) metamorphosis. We found that within homologous groups, more phylogenetically diverged genes exhibited more distinct temporal expression patterns. This relationship scaled such that more phylogenetically diverse homologous groups showed more diverse patterns of gene expression. Furthermore, we found that duplicate genes showed increased stage-specificity relative to singleton genes. Overall, our findings suggest an important link between gene duplication and the evolution of complex life cycles.","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evolution LettersPub Date : 2024-06-30eCollection Date: 2024-09-01DOI: 10.1093/evlett/qrae030
Selina Lindon, Sarah Shah, Danna R Gifford, Cédric Lood, Maria A Gomis Font, Divjot Kaur, Antonio Oliver, R Craig MacLean, Rachel M Wheatley
{"title":"Antibiotic resistance alters the ability of <i>Pseudomonas aeruginosa</i> to invade bacteria from the respiratory microbiome.","authors":"Selina Lindon, Sarah Shah, Danna R Gifford, Cédric Lood, Maria A Gomis Font, Divjot Kaur, Antonio Oliver, R Craig MacLean, Rachel M Wheatley","doi":"10.1093/evlett/qrae030","DOIUrl":"https://doi.org/10.1093/evlett/qrae030","url":null,"abstract":"<p><p>The emergence and spread of antibiotic resistance in bacterial pathogens is a global health threat. One important unanswered question is how antibiotic resistance influences the ability of a pathogen to invade the host-associated microbiome. Here we investigate how antibiotic resistance impacts the ability of a bacterial pathogen to invade bacteria from the microbiome, using the opportunistic bacterial pathogen <i>Pseudomonas aeruginosa</i> and the respiratory microbiome as our model system. We measure the ability of <i>P. aeruginosa</i> spontaneous antibiotic-resistant mutants to invade pre-established cultures of commensal respiratory microbes in an assay that allows us to link specific resistance mutations with changes in invasion ability. While commensal respiratory microbes tend to provide some degree of resistance to <i>P. aeruginosa</i> invasion, antibiotic resistance is a double-edged sword that can either help or hinder the ability of <i>P. aeruginosa</i> to invade. The directionality of this help or hindrance depends on both <i>P. aeruginosa</i> genotype and respiratory microbe identity. Specific resistance mutations in genes involved in multidrug efflux pump regulation are shown to facilitate the invasion of <i>P. aeruginosa</i> into <i>Staphylococcus lugdunensis</i>, yet impair invasion into <i>Rothia mucilaginosa</i> and <i>Staphylococcus epidermidis</i>. <i>Streptococcus</i> species provide the strongest resistance to <i>P. aeruginosa</i> invasion, and this is maintained regardless of antibiotic resistance genotype. Our study demonstrates how the cost of mutations that provide enhanced antibiotic resistance in <i>P. aeruginosa</i> can crucially depend on community context. We suggest that attempts to manipulate the microbiome should focus on promoting the growth of commensals that can increase the fitness costs associated with antibiotic resistance and provide robust inhibition of both wildtype and antibiotic-resistant pathogen strains.</p>","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424078/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evolution LettersPub Date : 2024-06-21eCollection Date: 2024-09-01DOI: 10.1093/evlett/qrae027
Steven A Frank
{"title":"A biological circuit to anticipate trend.","authors":"Steven A Frank","doi":"10.1093/evlett/qrae027","DOIUrl":"https://doi.org/10.1093/evlett/qrae027","url":null,"abstract":"<p><p>Organisms gain by anticipating future changes in the environment. Those environmental changes often follow stochastic trends. The steeper the slope of the trend, the more likely the trend's momentum carries the future trend in the same direction. This article presents a simple biological circuit that measures the momentum, providing a prediction about future trend. The circuit calculates the momentum by the difference between a short-term and a long-term exponential moving average. The time lengths of the two moving averages can be adjusted by changing the decay rates of state variables. Different time lengths for those averages trade off between errors caused by noise and errors caused by lags in predicting a change in the direction of the trend. Prior studies have emphasized circuits that make similar calculations about trends. However, those prior studies embedded their analyses in the details of particular applications, obscuring the simple generality and wide applicability of the approach. The model here contributes to the topic by clarifying the great simplicity and generality of anticipation for stochastic trends. This article also notes that, in financial analysis, the difference between moving averages is widely used to predict future trends in asset prices. The financial measure is called the moving average convergence-divergence indicator. Connecting the biological problem to financial analysis opens the way for future studies in biology to exploit the variety of highly developed trend models in finance.</p>","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424073/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evolution LettersPub Date : 2024-06-19eCollection Date: 2024-09-01DOI: 10.1093/evlett/qrae025
Jan Brabec, Jérémy Gauthier, Oliver M Selz, Rune Knudsen, Julia Bilat, Nadir Alvarez, Ole Seehausen, Philine G D Feulner, Kim Præbel, Isabel Blasco-Costa
{"title":"Testing the radiation cascade in postglacial radiations of whitefish and their parasites: founder events and host ecology drive parasite evolution.","authors":"Jan Brabec, Jérémy Gauthier, Oliver M Selz, Rune Knudsen, Julia Bilat, Nadir Alvarez, Ole Seehausen, Philine G D Feulner, Kim Præbel, Isabel Blasco-Costa","doi":"10.1093/evlett/qrae025","DOIUrl":"https://doi.org/10.1093/evlett/qrae025","url":null,"abstract":"<p><p>Reciprocal effects of adaptive radiations on the evolution of interspecific interactions, like parasitism, remain barely explored. We test whether the recent radiations of European whitefish (<i>Coregonus</i> spp.) across and within perialpine and subarctic lakes promote its parasite <i>Proteocephalus fallax</i> (Platyhelminthes: Cestoda) to undergo host repertoire expansion via opportunity and ecological fitting, or adaptive radiation by specialization. Using de novo genomic data, we examined <i>P. fallax</i> differentiation across lakes, within lakes across sympatric host species, and the contributions of host genetics versus host habitat use and trophic preferences. Whitefish intralake radiations prompted parasite host repertoire expansion in all lakes, whereas <i>P. fallax</i> differentiation remains incipient among sympatric fish hosts. Whitefish genetic differentiation per se did not explain the genetic differentiation among its parasite populations, ruling out codivergence with the host. Instead, incipient parasite differentiation was driven by whitefish phenotypic radiation in trophic preferences and habitat use in an arena of parasite opportunity and ecological fitting to utilize resources from emerging hosts. Whilst the whitefish radiation provides a substrate for the parasite to differentiate along the same water-depth ecological axis as <i>Coregonus</i> spp., the role of the intermediate hosts in parasite speciation may be overlooked. Parasite multiple-level ecological fitting to both fish and crustacean intermediate hosts resources may be responsible for parasite population substructure in <i>Coregonus</i> spp. We propose parasites' delayed arrival was key to the initial burst of postglacial intralake whitefish diversification, followed by opportunistic tapeworm host repertoire expansion and a delayed nonadaptive radiation cascade of incipient tapeworm differentiation. At the geographical scale, dispersal, founder events, and genetic drift following colonization of spatially heterogeneous landscapes drove strong parasite differentiation. We argue that these microevolutionary processes result in the mirroring of host-parasite phylogenies through phylogenetic tracking at macroevolutionary and geographical scales.</p>","PeriodicalId":48629,"journal":{"name":"Evolution Letters","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424076/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}