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470 results for “Analysis of Variation”
Data and analysis result for "A scalable variational approach to characterize pleiotropic components across thousands of human diseases and complex traits using GWAS summary statistics"
<p>Data set and analysis results from our paper "A scalable variational approach to characterize pleiotropic components across thousands of human diseases and complex traits using GWAS summary statistics" (pre-print). This file contains GWAS summary statistics of 2,483 traits and 51,399 SNP variants from European individuals, originally downloaded and processed from Pan-UK Biobank (https://pan.ukbb.broadinstitute.org/). Additionally, we include results of 100 pleiotropic factors inferred by our method and tSVD as comparison. Please see README for detailed breakdown.</p>
Supporting isotopic data for: Amino acid isotope analysis reveals variation in gut microbial contribution to host protein metabolism in a wild small mammal community
<p>Herbivory is a dominant feeding strategy among animals, yet herbivores are often protein limited. The gut microbiome is hypothesized to help maintain host protein balance by provisioning essential macromolecules, but this has never been tested in wild consumers. Using amino acid carbon (δ<sup>13</sup>C) and nitrogen (δ<sup>15</sup>N) isotope analysis, we estimated the proportional contributions of essential amino acids (AA<sub>ESS</sub>) synthesized by gut microbes to five co-occurring desert rodents representing herbivorous, omnivorous, and insectivorous functional groups. We found that herbivorous rodents occupying lower trophic positions (<em>Dipodomys </em>spp.) routed a substantial proportion (~40–50%) of their AA<sub>ESS</sub> from gut microbes, while higher trophic level omnivores (<em>Peromyscus </em>spp.) and insectivores (<em>Onychomys arenicola</em>) obtained most of their AA<sub>ESS</sub> (~58%) from plant-based energy channels but still received ~20% of their AA<sub>ESS</sub> from gut microbes. These findings empirically demonstrate that gut microbes play a key functional role in host protein metabolism in wild animals. </p>
Towards a mechanistic understanding of variation in aquatic food chain length revealed by meta-analysis
<p><span>Ecologists have long sought to understand the forces determining food chain lengths (FCLs). Multiple hypotheses have proposed a diverse array of potential environmental determinants of FCL, typically including ecosystem size, resource productivity, and disturbance. Yet, many empirical studies have found that FCL responses to these environmental variables can be positive as well as negative. To explain such mixed responses, we develop a simple yet comprehensive, site-occupancy dynamic framework for complex food webs by integrating multiple environmental drivers. With the competition-colonization tradeoff among basal species, our model shows that increasing ecosystem size results in a monotonic increase in FCL as a whole, while FCL displays a non-linear, oscillatory response to resource productivity or disturbance in benign environments. These predictions are generally supported by our meta-analysis of an empirical dataset compiled from diverse aquatic ecosystems. Therefore, this unifying framework offers a novel mechanistic explanation for observed variation in FCLs driven by multiple environmental factors.</span></p>
Data from: Transcriptomic analysis of skin pigmentation variation in the Virginia opossum (Didelphis virginiana).
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Data from: Morphometric analysis of inter- and intraspecific variation in the Cambrian helcionelloid mollusc Mackinnonia
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Data from: Novel sources of (co)variation in nestling begging behavior and hunger at different biological levels of analysis
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Phenotypic variation of the invasive plant <i>Ageratum conyzoides</i> and analysis of its competitiveness with the co-occurring indigenous species <i>Perilla frutescens</i>
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Data from: Individual differences in behaviour explain variation in survival: a meta-analysis
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Data from: Phenotypic integration limits the variation in plant phenotypic plasticity among traits: a meta-analysis
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Data from: Pan-genome analysis highlights the role of structural variation in the evolution and environmental adaptation of Asian honeybees
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Towards a mechanistic understanding of variation in aquatic food chain length revealed by meta-analysis
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Data from: Continental patterns of phenotypic variation along replicated urban gradients: A mega-analysis
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Data from: Explaining global variation in the latitudinal diversity gradient: meta-analysis confirms known patterns and uncovers new ones
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Supporting isotopic data for: Amino acid isotope analysis reveals variation in gut microbial contribution to host protein metabolism in a wild small mammal community
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Data, sample sizes, and R code for analysis of: Variation in mutation (co)variances
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Data from: the great tit HapMap project: a continental-scale analysis of genomic variation in a songbird
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Latitudinal gradient in the intensity of biotic interactions in terrestrial ecosystems: Sources of variation and differences from the diversity gradient revealed by meta-analysis
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Reduction of blob-filament radial propagation by parallel variation of flows: analysis of a gyrokinetic simulation
<p>The accompanying files contain digital data for figures in the article "Reduction of blob-filament radial propagation by parallel variation of flows: analysis of a gyrokinetic simulation" by J. R. Myra, S. Ku, D.A. Russell, J. Cheng, I. Keramidas Charidakos, S. E. Parker, R.M. Churchill, and C.S. Chang, submitted to the journal Physics of Plasmas.</p> <p> </p> <p><strong>Abstract</strong></p> <p>Data from the XGC1 gyrokinetic simulation is analyzed to understand the three-dimensional spatial structure and the radial propagation of blob-filaments generated by quasi-steady turbulence in the tokamak edge pedestal and scrape-off layer plasma. Spontaneous toroidal flows vary in the poloidal direction and shear the filaments within a flux surface resulting in a structure that varies in the parallel direction. This parallel structure allows the curvature and grad-B induced polarization charge density to be shorted out via parallel electron motion. As a result, it is found that the blob-filament radial velocity is significantly reduced from estimates which neglect parallel electron kinetics, broadly consistent with experimental observations. Conditions for when this charge shorting effect tends to dominate blob dynamics are derived and compared with the simulation.</p>
Consistent variations in personality traits and their potential for genetic improvement in the biocontrol agent Trichogramma evanescens - Data table and code for data analysis
<p>We provide data and code needed to re-do the analyses and figures presented in our preprint <em>Consistent variations in personality traits and their potential for genetic improvement in the biocontrol agent </em>Trichogramma evanescens (DOI : 10.1101/2020.08.21.257881 ):</p> <p>- data table : <em>data_repetition01.xls</em>, with informations about each column in the file <em>data_repetition_info.pdf</em></p> <p>- data table : <em>data_individual01.xls</em>, with informations about each column in the file <em>data_indivdual_info.pdf</em></p> <p><em>- </em>The R code used to do the analyses : <em>Rscript-Consistent variations in personality traits and their potential for genetic improvement in the biocontrol agent Trichogramma evanescens.R</em></p> <p><br> </p> <p> </p> <p> </p> <p> </p>
Comparative analysis of genetic and morphological variation within the Platanthera hyperborea complex (Orchidaceae)
<p>Species complexes present considerable problems for a working taxonomy due to the presence of intraspecific variation, hybridization, polyploidy, and phenotypic plasticity. Understanding evolutionary patterns using molecular markers can allow for a more thorough assessment of evolutionary lineages than traditional morphological markers. In this study, we evaluated genetic diversity and phylogenetic patterns among taxa of the <i>Platanthera hyperborea </i>(Orchidaceae) complex, which includes diploid (<i>Platanthera aquilonis</i>) and polyploid (<i>Platanthera hyperborea</i>,<i> P. huronensis</i>,<i> P. convallariifolia) </i>taxa spanning North America, Greenland, Iceland, and Asia. We found that three floral morphological characters overlap among the polyploid taxa, but the diploid species has smaller flowers. DNA sequence variation in a plastid (<i>rpL16</i> intron) and a nuclear (ITS) marker indicated that at least three diploid species have contributed to the genomes of the polyploid taxa, suggesting all are of allopolyploid origin. <i>Platanthera convallariifolia </i>is most like <i>P. dilatata </i>and <i>P. stricta</i>,<i> </i>whereas <i>P. huronensis </i>and <i>P. hyperborea </i>appear to have originated from crosses of <i>P. dilatata </i>and <i>P. aquilonis</i>. <i>Platanthera huronensis</i>,<i> </i>which is found across North America, has multiple origins and reciprocal maternal parentage from the diploid species. By contrast, <i>P. hyperborea</i>,<i> </i>restricted to Greenland and Iceland, appears to have originated from a small founding population of hybrids in which <i>P. dilatata </i>was the maternal parent. Geographic structure was found among polyploid forms in North America. The area of Manitoba, Canada appears to be a contact zone among geographically diverse forms from eastern and western North America. Given the geographic and genetic variation found, we recommend continued recognition of four green-flowered species within this complex, but caution that there may be additional cryptic taxa within North America.</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.