Evolution最新文献_第8页

The double-edged effect of environmental fluctuations on evolutionary rescue. 环境波动对进化救援的双刃剑效应。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-06 DOI: 10.1093/evolut/qpag034

Shota Shibasaki, Masato Yamamichi

{"title":"The double-edged effect of environmental fluctuations on evolutionary rescue.","authors":"Shota Shibasaki, Masato Yamamichi","doi":"10.1093/evolut/qpag034","DOIUrl":"https://doi.org/10.1093/evolut/qpag034","url":null,"abstract":"Recent studies revealed that contemporary evolution can prevent population extinction in deteriorating environments. Such evolutionary rescue has been intensively studied, but few have focused on environmental fluctuations. As global changes alter both the mean and variance of environmental variables, it is crucial to understand how environmental fluctuations affect evolutionary rescue. Here, through the evolution experiments on green algae Chlorella vulgaris, we show that increasing the amplitude of environmental fluctuations around long-term deteriorating trends has negative and positive effects on evolutionary rescue. We first increased the salinity level gradually to 0.6M NaCl and found that the algae exposed to large fluctuations tended to grow more slowly. This seems to be because large fluctuations produce an episode of a huge environmental change, which can increase adaptation lag. Then, we increased the salinity level to 1M NaCl and found that the algae exposed to large fluctuations grew while those exposed to smaller or no fluctuations did not. This seems enigmatic, but our mathematical model suggests that trait variance within a population might increase under large fluctuations, which can promote adaptive evolution. Our results highlight the complex role of environmental fluctuations in evolutionary rescue, calling for more investigations to understand evolutionary rescue in nature.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147364570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How is variation in fitness maintained? 适应性的变化是如何维持的？

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-06 DOI: 10.1093/evolut/qpag035

Brian Charlesworth

引用次数: 0

Coincident transitions across elevation and origins of functional innovations drove the phenotypic and ecological diversity of lungless salamanders. 跨海拔的同步过渡和功能创新的起源驱动了无肺蝾螈的表型和生态多样性。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf253

Edward D Burress, Meaghan R Gade, Eric A Riddell, Martha M Muñoz

{"title":"Coincident transitions across elevation and origins of functional innovations drove the phenotypic and ecological diversity of lungless salamanders.","authors":"Edward D Burress, Meaghan R Gade, Eric A Riddell, Martha M Muñoz","doi":"10.1093/evolut/qpaf253","DOIUrl":"10.1093/evolut/qpaf253","url":null,"abstract":"Ecological opportunity (EO) is an important catalyst for evolution. Whereas theory often centers around a lineage encountering a source of EO in isolation, in practice they experience numerous sources of opportunity, either concurrently or sequentially. Such multiplicity can obscure the macroevolutionary signature of EO. Here, we test the effects of elevation (a proxy of the \"mountain effect\") and an array of functional innovations on the evolutionary history of plethodontid salamanders, a diverse and charismatic radiation of lungless amphibians. Functional innovations unlock access to novel microhabitats, ultimately enabling sub-lineages to occupy a diverse range of ecological niches, particularly in lowland areas where those niches are more abundant. Consistent with expanded ecological opportunity, such transitions to lower elevation result in rapid phenotypic evolution. At high elevation, by contrast, rates of phenotypic evolution and phenotypic disparity decline, reflecting a loss of phenotypically extreme ecological specialists. Transitions in elevation and the origin of innovations appear largely coincident among lungless salamanders, suggesting myriad sources of EO. The magnitude of the \"mountain effect\" on evolutionary rates (∼10-fold) is on par or greatly exceeds that of islands, lakes, and coral reefs on other iconic vertebrate radiations. Therefore, we find that elevation acts as a major ecological moderator and, in concert with functional innovations, shapes the ecological and phenotypic diversity of lungless salamanders.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"616-630"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145761527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the repeated evolution of parthenogenesis in stick insects. 竹节虫孤雌生殖的重复进化研究。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf264

Tanja Schwander, Luca Soldini, Romain P Boisseau, Vincent Mérel, Morgane Massy, William Toubiana, Guillaume Lavanchy

{"title":"On the repeated evolution of parthenogenesis in stick insects.","authors":"Tanja Schwander, Luca Soldini, Romain P Boisseau, Vincent Mérel, Morgane Massy, William Toubiana, Guillaume Lavanchy","doi":"10.1093/evolut/qpaf264","DOIUrl":"10.1093/evolut/qpaf264","url":null,"abstract":"Female-producing parthenogenesis is widespread in stick insects. It ranges from rare in sexual species to facultative or obligate, the latter sometimes in hybrids. This review synthesizes current knowledge on its origins, mechanisms, and evolutionary consequences, highlighting the distinction between hybrid and intra-specific origins. Hybrid-derived parthenogens are rare, obligate, frequently polyploid, and produce heterozygous eggs via endoduplication. Intra-specific parthenogens are more frequent, typically diploid, and often homozygous due to gamete duplication. It can be facultative, allowing both reproductive modes. However, natural populations usually exhibit only one strategy, and intermediate sex ratios are rare. The mosaic distribution of mixed-sex and female-only populations without clear ecological differences suggests other factors drive the observed patterns. Sexual conflict has been proposed, but empirical data is not yet conclusive. In the Timema genus, multiple obligate parthenogens evolved independently from rare spontaneous parthenogenesis in sexual species. This suggests repeated selection for increased parthenogenesis frequencies in different genomic backgrounds. However, parthenogenesis is linked to reduced selection efficiency and slower adaptation. Overall, by providing an update on the current understanding of the phylogenetic distribution, mechanistic diversity, and transitions to parthenogenesis in stick insects, this review establishes Phasmatodea as a model to study the evolutionary significance of parthenogenesis.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"513-524"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145803721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digest: Winter is coming: overwintering selection and the cost of insecticide resistance in fruit flies. 摘要：冬季即将来临：果蝇越冬选择及抗药性代价。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf256

Anna Maria Langmüller

引用次数: 0

Commentary: evidence that sexually antagonistic male coloration factors are clustered in a rarely recombining region near the guppy male-determining locus. 评论：有证据表明，性拮抗的雄性着色因子聚集在孔雀鱼雄性决定位点附近一个很少重组的区域。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf265

Deborah Charlesworth

引用次数: 0

Nest weave pattern in weaverbirds: a sexual signal selected through sensory drive? 织鸟的巢织模式：通过感官驱动选择的性信号？

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf252

Erwan Harscouet-Commecy, Olivier Penacchio, Hans-Dieter Oschadleus, Pierre Colençon, Matthieu Pelte, Paul Dufour, Staffan Andersson, Rita Covas, Julien P Renoult, Claire Doutrelant

{"title":"Nest weave pattern in weaverbirds: a sexual signal selected through sensory drive?","authors":"Erwan Harscouet-Commecy, Olivier Penacchio, Hans-Dieter Oschadleus, Pierre Colençon, Matthieu Pelte, Paul Dufour, Staffan Andersson, Rita Covas, Julien P Renoult, Claire Doutrelant","doi":"10.1093/evolut/qpaf252","DOIUrl":"10.1093/evolut/qpaf252","url":null,"abstract":"Nests are primarily shaped by natural selection, but are also subject to sexual selection. Here, we investigated the potential role of sexual selection in shaping nest visual patterns, focusing on scale-invariance, a property describing how patterns remain similar across spatial scales. In humans, it has been documented that visual patterns are more attractive when their scale-invariance resembles natural habitats, likely because they are more efficiently processed. The underlying mechanism, called processing bias, extends the sensory drive hypothesis from colors to patterns. Applied to birds, processing bias predicts that nests whose scale-invariance matches natural habitats could be sexually selected. We tested this using a comparative analysis of weaverbirds. We quantified the deviation of nest scale-invariance from a range of putative selection optima, and then evaluated whether interspecific variation in this deviation is explained by mating system and sexual size dimorphism, two proxies for sexual selection. For both proxies, effect sizes were largest for the same putative optimum, aligning with scale-invariance values in natural habitats. Sexual selection may thus favor nest designs that are efficiently processed, such as those with habitat-like features. Our findings also highlight the challenge of designing a specific test for this hypothesis and call for further research linking pattern perception and sexual selection.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"600-615"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145676773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inferring the strength of directional selection on armor plates in Lake Washington stickleback while accounting for migration and drift. 在考虑迁移和漂移的情况下，推断华盛顿湖棘鱼甲壳上定向选择的强度。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf254

Yo Y Yamasaki, Ryo Yamaguchi, Atsushi J Nagano, Bo-Jyun Chen, Naomi Musto, Sophie Archambeault, Catherine L Peichel, Jennifer A Schulien, Tessa J Code, David A Beauchamp, Jun Kitano

{"title":"Inferring the strength of directional selection on armor plates in Lake Washington stickleback while accounting for migration and drift.","authors":"Yo Y Yamasaki, Ryo Yamaguchi, Atsushi J Nagano, Bo-Jyun Chen, Naomi Musto, Sophie Archambeault, Catherine L Peichel, Jennifer A Schulien, Tessa J Code, David A Beauchamp, Jun Kitano","doi":"10.1093/evolut/qpaf254","DOIUrl":"10.1093/evolut/qpaf254","url":null,"abstract":"Contemporary evolution allows us to investigate how natural selection drives phenotypic and genotypic evolution in nature. Recent advances in molecular genetics have identified causative genes underlying adaptive traits, enabling estimation of selection coefficients at these loci. However, estimating selection is challenging when populations receive migrants from genetically and phenotypically distinct populations. With genome-wide data now allowing estimation of migration rates and effective population sizes, these demographic parameters can be integrated into models for measuring selection. In Lake Washington, USA, the frequency of the completely plated morph of the threespine stickleback (Gasterosteus aculeatus) increased from 1957 to 2005, plausibly due to increased trout predation pressure caused by enhanced water clarity. Here, we estimated the selection coefficient at a major locus responsible for the plate morph using historical data, taking migration and genetic drift into consideration. Model-based predictions of present allele frequencies were tested with samples collected in 2022. Consistent with directional selection, the completely plated morphs and the underlying allele have increased since 2005, but to higher frequencies than predicted, suggesting a recent increase in selection. Thus, integrating molecular genetics, population genomics, and simulations enables the estimation of selection strength while considering migration and drift, to reveal directional selection in nature.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"631-643"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145761622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mosaic tri-lineage secondary contact shapes diverse genomic outcomes in darters. 马赛克三谱系二次接触形状不同的基因组结果在伙伴。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf260

Pia F Schwarz, Trevor J Krabbenhoft, Thomas J Near, Daniel J MacGuigan

{"title":"Mosaic tri-lineage secondary contact shapes diverse genomic outcomes in darters.","authors":"Pia F Schwarz, Trevor J Krabbenhoft, Thomas J Near, Daniel J MacGuigan","doi":"10.1093/evolut/qpaf260","DOIUrl":"10.1093/evolut/qpaf260","url":null,"abstract":"Speciation does not always lead to complete reproductive isolation, which can result in hybrid zones with gene flow. In freshwater fishes, secondary contact and hybridization can arise when river courses shift. Shifting river courses can create physical and ecological dispersal barriers, producing fragmented species distributions within the same stream system. Here, we investigate a secondary contact zone in western New York (USA) between the Tessellated Darter (Etheostoma olmstedi) and the Johnny Darter (Etheostoma nigrum), integrating double digest restriction site associated DNA sequencing (ddRADseq), low-coverage whole genome sequencing (lcWGS), and mtDNA datasets. Our analyses reveal a complex tri-lineage hybrid zone of E. olmstedi and two divergent E. nigrum lineages. lcWGS and ddRADseq approaches yield similar overall results for population genetic structure; however, the two approaches differ in estimates of the magnitude of population differentiation. Several sites with ongoing admixture are proximate to stream confluences and form a temporally stable mosaic of hybridization across the contact zone. We observe active and apparently stable states of hybridization, supporting the hypothesis that niche partitioning by stream size maintains species identity. The species and populations in the contact zone maintain high levels of genome-wide differentiation across streams. Our study provides insight into the dynamic process of secondary contact and highlights the array of possible genomic outcomes of hybridization.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"644-660"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145803672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phenotypic plasticity in turtle ants has opposing evolutionary consequences for genes and regulatory loci. 龟蚁的表型可塑性对基因和调控位点具有相反的进化结果。

IF 2.6 2区环境科学与生态学

Evolution Pub Date : 2026-03-03 DOI: 10.1093/evolut/qpaf237

Megan Barkdull, Corrie S Moreau

{"title":"Phenotypic plasticity in turtle ants has opposing evolutionary consequences for genes and regulatory loci.","authors":"Megan Barkdull, Corrie S Moreau","doi":"10.1093/evolut/qpaf237","DOIUrl":"10.1093/evolut/qpaf237","url":null,"abstract":"Phenotypic plasticity is widespread and evolutionarily important, but genomic consequences of new plastic traits remain unclear. Here, we explore patterns of molecular evolution linked to the repeated evolution of Cephalotes turtle ant worker plasticity, in which smaller minor workers and distinct larger soldiers are produced from a single genomic blueprint through developmentally plastic mechanisms. We integrate developmental transcriptomics with comparative genomic approaches to test the relative relationships of selection on genes, selection on regulatory sequences, and the emergence of lineage-specific genes with the repeated evolution of the soldier morph. We find that phenotypic plasticity shields protein-coding genes from selection, whereas it imposes a strong selective constraint on the evolution of gene regulatory loci. The development of a soldier morph disproportionately involves the activity of evolutionarily ancient genes. Moreover, our data link 3 pathways-nutrition via insulin signaling, imaginal disc development, and for the first time Hippo signaling-which allow for the differential development of soldiers and workers from a single genomic background in turtle ants. Taken together, our results provide evidence that plasticity leads to relaxed selection on genes, but imposes selective constraint on regulatory elements, during the repeated evolution of the turtle ant soldier morph.","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"554-569"},"PeriodicalIF":2.6,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145548630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0