Molecular Ecology最新文献_第2页

Species-Specific Traits Shape Genetic Diversity During an Expansion-Contraction Cycle and Bias Demographic History Reconstruction.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-01-01 Epub Date: 2024-12-11 DOI: 10.1111/mec.17597

Ravi Vishwakarma, Gabriele Maria Sgarlata, David Soriano-Paños, Rita Rasteiro, Tiago Maié, Tiago Paixão, Rémi Tournebize, Lounès Chikhi

{"title":"Species-Specific Traits Shape Genetic Diversity During an Expansion-Contraction Cycle and Bias Demographic History Reconstruction.","authors":"Ravi Vishwakarma, Gabriele Maria Sgarlata, David Soriano-Paños, Rita Rasteiro, Tiago Maié, Tiago Paixão, Rémi Tournebize, Lounès Chikhi","doi":"10.1111/mec.17597","DOIUrl":"10.1111/mec.17597","url":null,"abstract":"Species ranges are dynamic, experiencing expansions, contractions or shifts in response to habitat changes driven by extrinsic factors such as climate change or human activities. While existing research examines the genetic consequences of spatial processes, few studies integrate species-specific traits to analyse how habitat changes affect co-existing species. In this study, we address this gap by investigating how genetic diversity patterns vary among species with different traits (such as generation length, population density and dispersal) experiencing similar habitat changes. Using spatial simulations and a simpler panmictic population model, we investigate the temporal genetic diversity in refugium populations undergoing range expansion of their habitat, followed by stationary and contraction periods. By varying habitat contraction speed and species traits, we identified three distinct temporal dynamics of genetic diversity during contraction: (i) a decrease in genetic diversity, (ii) an initial increase followed by a decrease and (iii) a continuous increase throughout the contraction period. We show that genetic diversity trajectories during population decline can be predicted by comparing sampled population diversity to equilibrium values expected under expanded and contracted habitat ranges. Our study also challenges the belief that high genetic diversity in a refugium population is due to a recent and rapid habitat loss. Instead, we found contrasting effects of contraction speed on genetic diversity depending on the interaction between species-specific traits and the dynamics of habitat change. Finally, using simulated genetic data, we found that demographic histories inferred from effective population size estimates may vary across species, even when they experience similar habitat changes.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17597"},"PeriodicalIF":4.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811454","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}

引用次数: 0

Field Reduction of Ectomycorrhizal Fungi Has Cascading Effects on Soil Microbial Communities and Reduces the Abundance of Ectomycorrhizal Symbiotic Bacteria. 田间减少外生菌根真菌会对土壤微生物群落产生连带效应，并降低外生菌根共生细菌的丰度。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-01-01 Epub Date: 2024-11-11 DOI: 10.1111/mec.17585

Louis Berrios, Kabir G Peay

{"title":"Field Reduction of Ectomycorrhizal Fungi Has Cascading Effects on Soil Microbial Communities and Reduces the Abundance of Ectomycorrhizal Symbiotic Bacteria.","authors":"Louis Berrios, Kabir G Peay","doi":"10.1111/mec.17585","DOIUrl":"10.1111/mec.17585","url":null,"abstract":"Specific interactions between bacteria and ectomycorrhizal fungi (EcMF) can benefit plant health, and saprotrophic soil fungi represent a potentially antagonistic guild to these mutualisms. Yet there is little field-derived experimental evidence showing how the relationship among these three organismal groups manifests across time. To bridge this knowledge gap, we experimentally reduced EcMF in forest soils and monitored both bacterial and fungal soil communities over the course of a year. Our analyses demonstrate that soil trenching shifts the community composition of fungal communities towards a greater abundance of taxa with saprotrophic traits, and this shift is linked to a decrease in both EcMF and a common ectomycorrhizal helper bacterial genus, Burkholderia, in a time-dependent manner. These results not only reveal the temporal nature of a widespread tripartite symbiosis between bacteria, EcMF and a shared host tree, but they also refine our understanding of the commonly referenced 'Gadgil effect' by illustrating the cascading effects of EcMF suppression and implicating soil saprotrophic fungi as potential antagonists on bacterial-EcMF interactions.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17585"},"PeriodicalIF":4.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613298","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}

引用次数: 0

Divergent Population Structure in Five Common Rockfish Species of Puget Sound, WA Suggests the Need for Species-Specific Management. 华盛顿州普吉特湾五种常见石首鱼的种群结构差异表明有必要进行特定物种管理。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-01-01 Epub Date: 2024-11-25 DOI: 10.1111/mec.17590

Anita Wray, Eleni Petrou, Krista M Nichols, Robert Pacunski, Larry LeClair, Kelly S Andrews, Dana Haggarty, Lorenz Hauser

{"title":"Divergent Population Structure in Five Common Rockfish Species of Puget Sound, WA Suggests the Need for Species-Specific Management.","authors":"Anita Wray, Eleni Petrou, Krista M Nichols, Robert Pacunski, Larry LeClair, Kelly S Andrews, Dana Haggarty, Lorenz Hauser","doi":"10.1111/mec.17590","DOIUrl":"10.1111/mec.17590","url":null,"abstract":"Quantifying connectivity between endangered or threatened marine populations is critical information for management and conservation, especially where abundance and productivity differ among such populations. Spatial patterns of such connectivity depend not only on extrinsic factors such as oceanography and bathymetry but also on intrinsic species-specific factors such as life history, demography and the location of glacial refugia. Nevertheless, population structure is often inferred from related or ecologically similar species. For example, the population structure in most rockfish species (Sebastes spp.) in the Salish Sea and the US West Coast is currently inferred from genetic data of three species that are known to hybridise in Puget Sound. Here, we determined the population structure and connectivity in five Puget Sound Rockfish species (Black [Sebastes melanops], Yellowtail [S. flavidus], Redstripe [S. proriger], Greenstriped [S. elongatus], and Puget Sound Rockfish [S. emphaeus]) from over 12,000 restriction-site associated DNA sequencing (RADseq) loci. We found species-specific patterns of genetic differentiation, attributable to both extrinsic and intrinsic factors. Specifically, Black and Puget Sound rockfishes showed no genetic differentiation; Yellowtail and Greenstriped rockfishes were structured according to known geographic barriers; and Redstripe Rockfish revealed evidence for temporal genetic differentiation, suggesting irregular recruitment influences population structure. Only Yellowtail Rockfish followed the federal DPS boundaries generally assumed for rockfish, further emphasizing the importance of species-specific management for the effective recovery and management of these rockfish populations and of marine species in general.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17590"},"PeriodicalIF":4.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714798","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}

引用次数: 0

Genotype-by-Environment Effects of Cis-Variations in the Atgl Promoter Mediate the Divergent Pattern of Phenotypic Plasticity for Temperature Adaptation in Two Congeneric Oyster Species.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-24 DOI: 10.1111/mec.17623

Mingyang Du, Chaogang Wang, Zhuxiang Jiang, Rihao Cong, Ao Li, Wei Wang, Guofan Zhang, Li Li

{"title":"Genotype-by-Environment Effects of Cis-Variations in the Atgl Promoter Mediate the Divergent Pattern of Phenotypic Plasticity for Temperature Adaptation in Two Congeneric Oyster Species.","authors":"Mingyang Du, Chaogang Wang, Zhuxiang Jiang, Rihao Cong, Ao Li, Wei Wang, Guofan Zhang, Li Li","doi":"10.1111/mec.17623","DOIUrl":"https://doi.org/10.1111/mec.17623","url":null,"abstract":"Phenotypic plasticity plays an essential role in adaptive evolution. However, the molecular mechanisms of how genotype-by-environment interaction (G × E) effects shape phenotypic plasticity in marine organisms remain poorly understood. The crucial temperature-responsive trait triacylglycerol (TAG) content and its major gene adipose triglyceride lipase (Atgl) expression have divergent plastic patterns in two congeneric oyster species (Crassostrea gigas and Crassostrea angulata) to adapt to relative-cold/northern and relative-warm/southern habitats, respectively. In this study, eight putative loci were identified in the Atgl promoter region (cis-variations) between wild C. gigas and C. angulata that exhibited differential environmental responsiveness (G × E). The G and G × E effects of each locus were further dissected by measuring the Atgl gene expression of different genotypes in response to temperature changes at the cellular and organismal levels. Two transcription factors, non-environmentally responsive non-POU domain-containing octamer-binding protein (Nono) and environmentally responsive heterogeneous nuclear ribonucleoprotein K (Hnrnpk), were screened for binding to g.-1804 (G locus) and g.-1919 (G + G × E locus), respectively. The specificity of Nono binding to the C. angulata allele mediated the G effects of g.-1804, and the lower environmental sensitivity of Hnrnpk in C. angulata mediated the G × E effects of g.-1919, jointly regulating the trade-offs between higher constitutive and lower plastic expression of Atgl gene expression in C. angulata. This study served as an experimental case to reveal how the genetic variations with G and (or) G × E effects propagate into the divergent pattern of plasticity in environmental adaptive traits, which provides new insights into predicting the adaptability of marine organisms to future climate changes.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17623"},"PeriodicalIF":4.5,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142881039","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}

引用次数: 0

Trans-Specific Polymorphisms Between Cryptic Daphnia Species Affect Fitness and Behavior.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-24 DOI: 10.1111/mec.17632

Connor S Murray, Madison Karram, David J Bass, Madison Doceti, Dörthe Becker, Joaquin C B Nunez, Aakrosh Ratan, Alan O Bergland

{"title":"Trans-Specific Polymorphisms Between Cryptic Daphnia Species Affect Fitness and Behavior.","authors":"Connor S Murray, Madison Karram, David J Bass, Madison Doceti, Dörthe Becker, Joaquin C B Nunez, Aakrosh Ratan, Alan O Bergland","doi":"10.1111/mec.17632","DOIUrl":"https://doi.org/10.1111/mec.17632","url":null,"abstract":"Shared polymorphisms, loci with identical alleles across species, are of unique interest in evolutionary biology as they may represent cases of selection maintaining ancient genetic variation post-speciation, or contemporary selection promoting convergent evolution. In this study, we investigate the abundance of shared polymorphism between two members of the Daphnia pulex species complex. We test whether the presence of shared mutations is consistent with the action of balancing selection or alternative hypotheses such as hybridization, incomplete lineage sorting or convergent evolution. We analyzed over 2,000 genomes from six taxa in the D. pulex species group and examined the prevalence and distribution of shared alleles between the focal species pair, North American and European D. pulex. We show that North American and European D. pulex diverged over 10 million years ago, yet retained tens of thousands of shared polymorphisms. We suggest that the number of shared polymorphisms between North American and European D. pulex cannot be fully explained by hybridization or incomplete lineage sorting alone. We show that most shared polymorphisms could be the product of convergent evolution, that a limited number appear to be old trans-specific polymorphisms, and that balancing selection is affecting convergent and ancient mutations alike. Finally, we provide evidence that a blue wavelength opsin gene with trans-specific polymorphisms has functional effects on behavior and fitness in the wild.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17632"},"PeriodicalIF":4.5,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880602","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}

引用次数: 0

A Genetic Variant of Delta-9 Desaturase Is Associated With Latitudinal Adaptation in a Coral from the Great Barrier Reef.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-24 DOI: 10.1111/mec.17634

Kristina L Black, Line K Bay, Mikhail V Matz

{"title":"A Genetic Variant of Delta-9 Desaturase Is Associated With Latitudinal Adaptation in a Coral from the Great Barrier Reef.","authors":"Kristina L Black, Line K Bay, Mikhail V Matz","doi":"10.1111/mec.17634","DOIUrl":"https://doi.org/10.1111/mec.17634","url":null,"abstract":"Coral populations across the Great Barrier Reef (GBR) could rapidly adapt to the warming climate if they have standing genetic variation for thermal tolerance. Here, we describe a locus likely involved in latitudinal adaptation of Acropora millepora. This locus shows a steep latitudinal gradient of derived allele frequency increasing at higher latitudes, and harbours a cluster of eight tandemly repeated Δ9-desaturase genes adjacent to a region in the genome where a hard selective sweep likely occurred. In colonies reciprocally transplanted across 4.5° of latitude, the expression of Δ9-desaturase is upregulated at the high-latitude reef. Furthermore, corals from the low-latitude reef bearing the derived Δ9-desaturase allele express the gene more and grow faster than their peers when transplanted to the high-latitude reef. In other organisms ranging from bacteria to fish, Δ9-desaturase is upregulated under cold conditions to adjust membrane fluidity by introducing double bonds into fatty acid chains of membrane lipids. It is therefore plausible that the signal of latitudinal adaptation at the Δ9-desaturase locus is due to its involvement in adaptation to cooler temperatures at higher latitudes.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17634"},"PeriodicalIF":4.5,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142881037","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}

引用次数: 0

Population Genomics of Adaptive Radiation.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-24 DOI: 10.1111/mec.17574

Lucia L Combrink, Jimena Golcher-Benavides, Alexander L Lewanski, Jessica A Rick, William C Rosenthal, Catherine E Wagner

{"title":"Population Genomics of Adaptive Radiation.","authors":"Lucia L Combrink, Jimena Golcher-Benavides, Alexander L Lewanski, Jessica A Rick, William C Rosenthal, Catherine E Wagner","doi":"10.1111/mec.17574","DOIUrl":"https://doi.org/10.1111/mec.17574","url":null,"abstract":"Adaptive radiations are rich laboratories for exploring, testing, and understanding key theories in evolution and ecology because they offer spectacular displays of speciation and ecological adaptation. Particular challenges to the study of adaptive radiation include high levels of species richness, rapid speciation, and gene flow between species. Over the last decade, high-throughput sequencing technologies and access to population genomic data have lessened these challenges by enabling the analysis of samples from many individual organisms at whole-genome scales. Here we review how population genomic data have facilitated our knowledge of adaptive radiation in five key areas: (1) phylogenetics, (2) hybridization, (3) timing and rates of diversification, (4) the genomic basis of trait evolution, and (5) the role of genome structure in divergence. We review current knowledge in each area, highlight outstanding questions, and focus on methods that facilitate detection of complex patterns in the divergence and demography of populations through time. It is clear that population genomic data are revolutionising the ability to reconstruct evolutionary history in rapidly diversifying clades. Additionally, studies are increasingly emphasising the central role of gene flow, re-use of standing genetic variation during adaptation, and structural genomic elements as facilitators of the speciation process in adaptive radiations. We highlight hybridization-and the hypothesized processes by which it shapes diversification-and questions seeking to bridge the divide between microevolutionary and macroevolutionary processes as rich areas for future study. Overall, access to population genomic data has facilitated an exciting era in adaptive radiation research, with implications for deeper understanding of fundamental evolutionary processes across the tree of life.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17574"},"PeriodicalIF":4.5,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880598","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}

引用次数: 0

Random Mating in a Hybrid Zone Between Two Putative Climate-Adapted Bird Lineages With Predicted Mitonuclear Incompatibilities.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-24 DOI: 10.1111/mec.17612

Lana M Austin, J Nevil Amos, Diana A Robledo-Ruiz, Jessica W Zhou, Rohan H Clarke, Alexandra Pavlova, Paul Sunnucks

{"title":"Random Mating in a Hybrid Zone Between Two Putative Climate-Adapted Bird Lineages With Predicted Mitonuclear Incompatibilities.","authors":"Lana M Austin, J Nevil Amos, Diana A Robledo-Ruiz, Jessica W Zhou, Rohan H Clarke, Alexandra Pavlova, Paul Sunnucks","doi":"10.1111/mec.17612","DOIUrl":"https://doi.org/10.1111/mec.17612","url":null,"abstract":"Biochemical and evolutionary interactions between mitochondrial and nuclear genomes ('mitonuclear interactions') are proposed to underpin fundamental aspects of biology including evolution of sexual reproduction, adaptation and speciation. We investigated the role of pre-mating isolation in maintaining functional mitonuclear interactions in wild populations bearing diverged, putatively co-adapted mitonuclear genotypes. Two lineages of eastern yellow robin Eopsaltria australis-putatively climate-adapted to 'inland' and 'coastal' climates-differ by ~7% of mitogenome nucleotides, whereas nuclear genome differences are concentrated into a sex-linked region enriched with mitochondrial functions. Female-specific selection and male-mediated gene flow across the hybrid zone where the lineages coexist and interbreed can explain this pattern. It remains unknown whether lineage divergence is driven by intrinsic incompatibilities (particularly in females; Haldane's rule), extrinsic selection, both, or other drivers. We tested whether lineage divergence could be facilitated by non-random mate-pairing with respect to partners' mitolineage and/or mitonuclear genes encoded by the Z sex-chromosome, which differ between the lineages. We used field-, Z-linked- and mitolineage data from two locations where lineages hybridise to test whether females mate disproportionately with (1) males of their own mitolineage and/or bearing similar Z-linked variation, as might be expected if hybrids experience intrinsic incompatibilities, or (2) putatively locally-adapted males, as might be expected under environmental selection. Comparing field observations with simulations provided no evidence of non-random mating, thus drivers of observed population genetic patterns are consistent with reduced female gene flow likely acting post-mating. Future tests of female-biased mortality at different life stages and habitat selection may clarify mechanisms of selection.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17612"},"PeriodicalIF":4.5,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880601","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}

引用次数: 0

Population Dynamics and the Microbiome in a Wild Boreal Mammal: The Snowshoe Hare Cycle and Impacts of Diet, Season and Predation Risk.

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-19 DOI: 10.1111/mec.17629

Mason R Stothart, Sophia Lavergne, Laura McCaw, Hardeep Singh, Wilfred de Vega, Katherine Amato, Jocelyn Poissant, Rudy Boonstra

{"title":"Population Dynamics and the Microbiome in a Wild Boreal Mammal: The Snowshoe Hare Cycle and Impacts of Diet, Season and Predation Risk.","authors":"Mason R Stothart, Sophia Lavergne, Laura McCaw, Hardeep Singh, Wilfred de Vega, Katherine Amato, Jocelyn Poissant, Rudy Boonstra","doi":"10.1111/mec.17629","DOIUrl":"https://doi.org/10.1111/mec.17629","url":null,"abstract":"The North American boreal forest is a massive ecosystem, and its keystone herbivore is the snowshoe hare (Lepus americanus). Hares are exposed to considerable environmental extremes in diet and weather, food availability, and predation risk. Gut microbiomes have been suggested to facilitate adaptive animal responses to environmental change, but severe environmental challenges to homeostasis can also disrupt host-microbiome relationships. To better understand gut microbiome contributions to animal acclimation, we studied the faecal bacterial microbiome of wild hares across two types of extreme environmental change that are integral to their natural history: (1) seasonal transitions between summer and winter, and (2) changes over the ~10 year 'boom-bust' population cycles that are characterised by shifting food resource availability and predation pressure. When compared to summer, hares in winter had lower bacterial richness and were depleted in 20 families (including Oxalobacteraceae and Christensenellaceae) but enriched for Ruminococcaceae (a family which contains plant fibre degrading bacteria) alongside nine other bacterial groups. Marked bacterial microbiome differences also occurred across phases of the population cycle. Bacterial microbiomes were lower in richness and compositionally distinct in the peak compared to the increase or decline phases of the population cycle. Direct measures of host physiology and diet quality (faecal fibre contents) most strongly supported food resource availability as a mechanism underlying phase-based differences in bacterial communities, but faecal fibre contents could not fully account for bacterial microbiome variation across phases.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17629"},"PeriodicalIF":4.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851628","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}

引用次数: 0

Ocean-Wide Conservation Genomics of Blue Whales Suggest New Northern Hemisphere Subspecies. 蓝鲸的全海域保护基因组学揭示了新的北半球亚种。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2024-12-17 DOI: 10.1111/mec.17619

Magnus Wolf, Menno J de Jong, Axel Janke

{"title":"Ocean-Wide Conservation Genomics of Blue Whales Suggest New Northern Hemisphere Subspecies.","authors":"Magnus Wolf, Menno J de Jong, Axel Janke","doi":"10.1111/mec.17619","DOIUrl":"https://doi.org/10.1111/mec.17619","url":null,"abstract":"The blue whale is an endangered and globally distributed species of baleen whale with multiple described subspecies, including the morphologically and genetically distinct pygmy blue whale. North Atlantic and North Pacific populations, however, are currently regarded as a single subspecies despite being separated by continental land masses and acoustic call differences. To determine the degree of isolation among the Northern Hemisphere populations, 14 North Pacific and 6 Western Australian blue whale nuclear and mitochondrial genomes were sequenced and analysed together with 11 publicly available North Atlantic blue whale genomes. Population genomic analyses revealed distinctly differentiated clusters and limited genetic exchange among all three populations, indicating a high degree of isolation between the Northern Hemisphere populations. Nevertheless, the genomic and mitogenomic distances between all blue whale populations, including the Western Australian pygmy blue whale, are low when compared to other inter-subspecies distances in cetaceans. Given that the Western Australian pygmy blue whale is an already recognised subspecies and further supported by previously reported acoustic differences, a proposal is made to treat the two Northern Hemisphere populations as separate subspecies, namely Balaenoptera musculus musculus (North Atlantic blue whale) and Balaenoptera musculus sulfureus (North Pacific blue whale). Furthermore, a first molecular viability assessment of all three populations not only found a generally high genomic diversity among blue whales but also a lack of alleles at low frequency, non-neutral evolution and increased effects of inbreeding. This suggests a substantial anthropogenic impact on the genotypes of blue whales and calls for careful monitoring in future conservation plans.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17619"},"PeriodicalIF":4.5,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833378","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}

引用次数: 0