筛选
科学数据
统计数据
共检索到41条 ,权限内显示50条;
Data from: Global test of Eltonian niche conservatism of nonnative freshwater fish species between their native and introduced ranges
- 负责人：
- DOI：
- doi:10.5061/dryad.6q036
- 摘要：
- Despite growing evidence that biotic interactions limit the distribution of species and their potential redistribution under climate change, the recent surge of interest in niche conservatism has predominantly focused on the Grinellian (abiotic) niche, whereas few studies have attempted to quantify potential lability in the Eltonian (biotic or trophic) niche. Here, we test for conservatism in the Eltonian niche of 32 freshwater fish species between their introduced and native ranges from 435 populations across the globe. We used stable isotope data to quantify niche shifts along the horizontal (?13C: indicating the origin of the resources consumed) and vertical (?15N: describing the trophic position) dimensions of the isotopic niche, as well as shifts in overall isotopic niche breadth. Using an assemblage centroid standardized isotope vector analysis and controlling for phylogenetic relatedness among species, we demonstrated that introduced freshwater fishes exhibited flexibility in both resource use and trophic position that was beyond levels of natural variability observed in their native ranges. By contrast, niche breadth showed variability only within the limits recorded in native populations and varied independently from shifts in mean isotopic niche positions. Across all species and introduction histories, we found a consistent shift towards more balanced acquisition of resources with mixed origins and at intermediate trophic positions, suggesting a general mechanism by which fish species successfully establish into recipient communities. The mechanisms that promote or inhibit species from shifting their Eltonian niche remains unknown, but trophic flexibility is likely to contribute to both the success and the ecological impacts of invasive species and range shifts of native species under future global change.
Data from: How “simple” methodological decisions affect interpretation of population structure based on reduced representation library DNA sequencing: a case study using the lake whitefish
- 负责人：
- DOI：
- doi:10.5061/dryad.4vr8kp3
- 摘要：
- of these “simple” decisions, we generated two independent sequencing libraries for the same 142 individual lake whitefish (Coregonus clupeaformis) usi
Data from: Attack of the PCR clones: rates of clonality have little effect on RAD-seq genotype calls
- 负责人：
- DOI：
- doi:10.5061/dryad.3mq4631
- 摘要：
- Interpretation of high-throughput sequence data requires an understanding of how decisions made during bioinformatic data processing can influence results. One source of bias that is often cited is PCR clones (or PCR duplicates). PCR clones are common in restriction site associated sequencing (RAD-seq) datasets, which are increasingly being used for molecular ecology. To determine the influence PCR clones and the bioinformatic handling of clones have on genotyping, we evaluate four RAD-seq datasets. Datasets were compared before and after clones were removed to estimate the number of clones present in RAD-seq data, quantify how often the presence of clones in a dataset cause genotype calls to change compared to when clones were removed, investigate the mechanisms that lead to genotype call changes, and test if clones bias heterozygosity estimates. Our RAD-seq datasets contained 30 – 60% PCR clones, but 95% of RAD-tags had five or fewer clones. Relatively few genotypes changed once clones were removed (5-10%), and the vast majority of these changes (98%) were associated with genotypes switching from a called to no-call state or vice versa. PCR clones had a larger influence on genotype calls in individuals with low read depth but appeared to influence genotype calls at all loci similarly. Removal of PCR clones reduced the number of called genotypes by 2% but had almost no influence on estimates of heterozygosity. As such, while steps should be taken to limit PCR clones during library preparation, PCR clones are likely not a substantial source of bias for most RAD-seq studies.
Data from: Male investments in high quality sperm improve fertilization success, but may have negative impact on offspring fitness in whitefish
- 负责人：
- 关键词：
- DOI：
- doi:10.5061/dryad.7gf83
- 摘要：
- -dependent differences in sperm traits could have any consequences for offspring fitness. We tested this possibility in whitefish (Coregonus
Data from: Origins and functional diversification of salinity-responsive Na+, K+ ATPase ?1 paralogs in salmonids
- 负责人：
- DOI：
- doi:10.5061/dryad.5c6v7
- 摘要：
- ly expressed than ?1a, did not experience positive selection during the evolution of anadromy in the Coregoninae and Salmonine. To determine if parallel
Data from: Ecological change alters the evolutionary response to harvest in a freshwater fish
- 负责人：
- Gobin, Jenilee
- 关键词：
- eco-evolutionary dynamics density-dependent growth stock-recruitment relationship probabilistic maturation reaction norm fisheries-induced evolution individual-based model regime change
- DOI：
- doi:10.5061/dryad.3g227m5
- 摘要：
- s– influence harvest-induced evolution and resilience in a freshwater fish. Our study focused on lake whitefish (Coregonus
lake whitefish species pair (Coregonus clupeaformis)
- 负责人：
- DOI：
- doi:10.5061/dryad.3nc54
- 摘要：
- Latest technological developments in evolutionary biology bring new challenges in documenting the intricate genetic architecture of species in the process of divergence. Sympatric populations of lake whitefish represent one of the key systems to investigate this issue. Despite the value of random genotype-by-sequencing methods and decreasing cost of sequencing technologies, it remains challenging to investigate variation in coding regions, especially in the case of recently duplicated genomes as in salmonids, as this greatly complicates whole genome resequencing. We thus designed a sequence capture array targeting 2773 annotated genes to document the nature and the extent of genomic divergence between sympatric dwarf and normal whitefish. Among the 2728 genes successfully captured, a total of 2182 coding and 10 415 noncoding putative single-nucleotide polymorphisms (SNPs) were identified after applying a first set of basic filters. A genome scan with a quality-refined selection of 2203 SNPs identified 267 outlier SNPs in 210 candidate genes located in genomic regions potentially involved in whitefish divergence and reproductive isolation. We found highly heterogeneous FST estimates among SNP loci. There was an overall low level of coding polymorphism, with a predominance of noncoding mutations among outliers. The heterogeneous patterns of divergence among loci confirm the porous nature of genomes during speciation with gene flow. Considering that few protein-coding mutations were identified as highly divergent, our results, along with previous transcriptomic studies, imply that changes in regulatory regions most likely had a greater role in the process of whitefish population divergence than protein-coding mutations. This study is the first to demonstrate the efficiency of large-scale targeted resequencing for a nonmodel species with such a large and unsequenced genome.
Data from: Double-digest RAD Sequencing using Ion Proton semiconductor platform (ddRADseq-ion) with non-model organisms
- 负责人：
- DOI：
- doi:10.5061/dryad.7tb72
- 摘要：
- whitefish Coregonus lavaretus and common lizard Zootoca vivipara. This resulted in ~962 million single-end reads overall and a mean of ~74 million reads pe
Data from: Coexistence and origin of trophic ecotypes of pygmy whitefish, Prosopium coulterii, in southwestern Alaskan lake
- 负责人：
- DOI：
- doi:10.5061/dryad.7pd82
- 摘要：
- species complexes have been well studied, particularly within the Coregonus clupeaformis-C. laveratus (lake and European whitefish, respectively) gr
Data from: Sex-specific prey partitioning in breeding piscivorous birds examined via a novel, non-invasive approach
- 负责人：
- DOI：
- doi:10.5061/dryad.b30c555
- 摘要：
- . The sexes differed significantly in their overall prey composition, even though Perca fluviatilis, Rutilus rutilus and Coregonus spp. represented the main
