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5,538 results for “Population data”
Population data for Dodonaea serratifolia targeted surveys January 2023
<p>Population data for Dodonaea serratifolia targeted surveys January 2023</p>
Data from: Contrasting demographic responses to size-selective harvesting among neighboring wild fish populations
<p>Sustainable harvesting of wild populations relies on evidence-based knowledge to predict harvesting outcomes for species and the ecosystems they inhabit. Although harvesting may elicit compensatory density-dependence, it is generally size-selective, which induces additional pressures that are challenging to forecast. Furthermore, responses to harvest may be population-specific and whether generalizable patterns exist remains unclear.</p> <p>Taking advantage of Parks Canada's mandate to remove introduced brook trout (<em>Salvelinus fontinalis</em>) to restore alpine lakes in Canadian parks, we experimentally applied standardized size-selective harvesting rates (the largest ~64% annually) for three consecutive summers in five populations with different initial size structures. Four unharvested populations were used as controls.</p> <p>At reduced densities, harvested and control populations exhibited similar density-dependent increases in specific growth, juvenile survival, and earlier maturation. However, size-selective harvesting simultaneously induced changes to size and age structure that contrasted among harvested populations. Average body length decreased in three of five harvested populations, whereas it tended to increase in control populations over the three years. We also detected contrasting, population-specific changes in body length variability and ultimately in length- and age-at-harvest in harvested populations but not controls.</p> <p>Overall, populations with smaller, more homogeneous body sizes, and living at high densities were most resilient to size-selective harvesting, exhibiting the smallest change in size-at-age. In contrast, large-bodied populations exhibited more substantial size-structure changes following selective harvesting: large-bodied populations experienced either stabilizing or disruptive pressures, when initial length variability was high or low, respectively.</p> <p><em>Synthesis and application</em>: Our results show that within species, size-selective harvesting inherently leads to more risk and uncertainty when harvesting populations with larger and more varied body sizes than smaller-bodied populations with less range in body size. Our study supports prioritizing regulations that protect harvested populations with larger and more varied body sizes. Such a management strategy would reduce the likelihood of eliciting unpredictable or undesirable demographic changes to fish populations with these attributes.</p>
Golden-cheeked warbler Integrated Population Model (IPM) data in Austin, TX (2011–2019)
<p>These data and code are associated with the publication in Ecosphere entitled "Urban land cover and El Nino events negatively impact population viability of an endangered North American songbird." We performed an integrated population model to evaluate the effect of climate patterns and urban land cover on the viability of an endangered wood-warbler breeding in central Texas. We used territory monitroing data from 2011–2019 to predict viability of the population 25 years into the future.</p>
Data for Selfing species has greater genetic diversity and less structure than related outcrossing species due to seed dispersal and population history in Roscoea (Zingiberaceae)
<p>Data matrix of two species with nexus format.</p>
Population data for Callitris monticola targeted surveys January 2023
<p>Population data for Callitris monticola collected during targeted surveys during January 2023. Data collection follows the Flora Connections protocol</p>
Data for: Reconstruction of regional and national population using intermittent census-type data: the case of Portugal, 1527-1864
<p>Data for:</p> <p>Palma, N., J. Reis and M. Zhang (2020). Reconstruction of regional and national population using intermittent census-type data: the case of Portugal, 1527-1864. <strong>Historical Methods</strong> 53 (1): 11-27 </p>
Data used by Calenge et al. in "Assessing the dynamics of Mycobacterium bovis infection in three French badger populations"
<p>The zip file contains the raw dataset used by Calenge et al. in their model of the <em>Mycobacterium bovis</em> infection in three French badger populations. The README file explains the content of this dataset.</p>
Code and data for: Demographic resilience may sustain significant coral populations in a 2°C-warmer world.
<p>Data and Matlab code produced for the manuscript: Mason, R. A. B., Bozec, Y.-M., & Mumby, P. J. (2023). Demographic resilience may sustain significant coral populations in a 2°C-warmer world. <em>Global Change Biology</em>, 29(14): 4152-4160. <a href="https://doi.org/10.1111/gcb.16741">https://doi.org/10.1111/gcb.16741</a></p> <p>For questions about the contents of this repository, please contact robert.mason1@uqconnect.edu.au</p>
Data for: Reproductive strategies of native plant populations altered by a plant invasion
<p><span>Invasive plant transformers substantially change the abiotic environment of invaded ecosystems and thus habitat</span><span> suitability to resident species. Post-invasion environmental a</span><span>lteration can also modify the selective pressure acting on native plants. Here, I explored whether the decrease in light availability due to an invasion of <em>Heracleum mantegazzianum</em> drives evolution of reproductive strategies of <em>Veronica chamaedrys</em>, a perennial plant combining sexual and clonal reproduction.</span></p> <p><span>Using a common garden experiment with plant material of <em>V. chamaedrys</em> from 23 sites with distinct invasion history and light conditions, I searched for changes in reproductive allocation. I also asked whether evolution of the two modes can be constrained by the genetic trade-off between them. Furthermore, the phenotypic trade-off between the two modes was explored in a field experiment.</span></p> <p><span>I found that invaded populations increased investments in clonal reproduction, a shift that was driven by decreased light availability, particularly in the early invasion phases. However, as light availability rebounded in the more advanced phases of invasion, so decreased allocation to clonal structures. In terms of relative allocation, increased investment in ramets was paralleled by reduced seed production, and the changes were underpinned by genetic trade-off. Finally, the phenotypic trade-off was demonstrated in the field experiment by showing that plants producing more ramets were also less likely to flower.</span></p> <p><span>These results suggest that an exotic plant invasion can drive evolution of reproductive allocation, here observed on a timescale of tens of years. This knowledge is important not only to predict long-term invasion impacts but also, more generally, to provide novel insights into the process of adaptation of plants to changing abiotic conditions. </span></p>
Microsatellite and morphological data for Carpobrotus species sampled from 40 different populations
<p>Microsatellite data for six loci and 698 individuals of Carpobrotus species sampled from 40 different population</p> <p>Morphological data for individuals of Carpobrotus species from 40 different populations</p>
Data from: Allometric brain reduction in an insular, dwarfed population of black-tailed deer
<p>Insular populations of mammals have been shown to undergo drastic morphological changes relative to mainland counterparts, and these adaptations can provide insight into the evolutionary effects of predation and competition. Selection has been shown to favor more energetically efficient body plans in insular mammals, even when this entails the reduction of anti-predator defenses, but few studies have focused on morphological effects within the same species. Previous research has established that insular large mammals tend to reduce in body size, and that size reduction may not scale isometrically across all body parts. The brain has been a particular subject of interest due to its high energy requirements. Here, we report that an extant, dwarfed island population of black-tailed deer (<em>Odocoileus hemionus columbianus</em>) exhibits significantly reduced brain mass relative to body mass in comparison to their mainland conspecifics, with brain mass 4.9% smaller in the island population for a given body mass. Further, in the dwarfed population, orbital area was 4.1% smaller for a given body mass, but this reduction was not significant. Foramina magna reduced isometrically. In resource-limited insular environments, negative allometry of the brain is consistent with predictions of reduced investment in energetically costly organs. This study is, to our knowledge, the first to examine the morphological effects of insularity on brain size in two conspecific populations, and these findings suggest that selection toward reduced brain size may act relatively quickly after isolation.</p>
Data from: Patterns in antipredator armature reduction and maintenance in isolated spring populations of an amphipod crustacean
<p class="xmsonormal"><span>Organisms colonizing new habitat can undergo adaptive change due to novel selective landscapes encountered in the new environment. Examples in nature where development of the same traits has repeatedly occurred on multiple independent occasions upon colonizing a novel habitat represent instances of parallel evolution. Here we test whether the colonization of spring habitat by the principally lacustrine amphipod crustacean <em>Pallaseopsis quadrispinosa </em>has resulted in parallel evolution in armature traits using empirical data on morphology and mitochondrial DNA and through a breeding experiment. Analysis of mtDNA CO1 sequences shows that the spring populations share no common history and have evolved in isolation from each other and from their neighbouring lake populations since deglaciation approximately 12000 years ago and are now fixed for different haplogroups. Dorsal spines and lateral projections were absent or less developed in all spring populations than in lake populations. Variation in armature development also could be explained by predator presence as populations with fish predators exhibited more developed spines than those without fish. In a laboratory breeding experiment, hybrid Spring X Lake F1 offspring had intermediate development of armature when compared to offspring of Lake X Lake and Spring X Spring matings. The results support the hypothesis that armature reduction has independently evolved on multiple occasions in <em>P. quadrispinosa. </em>Recent research has questioned the degree to which parallel evolution actually explains variance in traits. Taking into account predation regime, sexual dimorphism and mineral composition of the trait, a more precise understanding of the factors influencing parallel evolution emerges.</span></p>
Data from: probing variation in reaction norms in wild populations: the importance of reliable environmental proxies
<p><span>Many traits are phenotypically plastic, i.e., the same genotype expresses different phenotypes depending on the environment. Genotypes and individuals can vary in their response to the environment and this genetic (G×E) and individual (I×E) variation in reaction-norm slopes can have important ecological or evolutionary consequences. Studies on I×E/G×E often fail to show slope variation, potentially due to the choice of the environmental covariate. Identifying the genuine environmental driver of phenotypic plasticity (the cue) is practically impossible and hence only proxies can be used. If the proxy is too weakly correlated with the cue, this may lead researchers to conclude there is little or no (variation in) plasticity, and hence lead to downwardly biased estimates of the potential for plastic responses (or evolutionary change in the slope) in response to environmental change. Alternatively, the Environment-Specific Mean phenotype (ESM) across individuals—which captures all environmental effects on the phenotype—as covariate should be less prone to such bias. We showed by simulation—after verifying the concept analytically—that using weakly correlated proxies indeed biased estimates of slope variation vis-à-vis the true cue downward but that ESM as a covariate held up well, even when multiple sources of I×E or an interaction between environments (I×E×E) existed in the data. Analysis of two real datasets revealed that estimated I×E and G×E, respectively, were more sizeable and precise when using ESM as opposed to reasonably informative environmental proxies. We argue that the ESM approach should be adopted by biologists as a yardstick in the study of (variation in) plasticity in the wild and that it may serve as a useful starting point for the search of better environmental proxies and unravelling complex I×E or G×E patterns.</span></p>
Multi-omics data analysis for rare population inference using single-cell graph transformer
<p>## MarsGT: For rare cell identification from matched scRNA-seq (snRNA-seq) and scATAC-seq (snATAC-seq),includes genes, enhancers, and cells in a heterogeneous graph to simultaneously identify major cell clusters and rare cell clusters based on eRegulon.</p> <p>## Data Collection The data was collected using GEO Database.</p> <p>## Data Format The data is stored as TSV file and MTX file where each row represents a gene and each column represents a sample. </p> <p>## Variables - Gene IDs: Gene Symbols (e.g., MALAT1) - Sample IDs: Sample identifiers (e.g., AAACATGCAAATTCGT-1) - Expression level: Row gene expression level.</p>
Data from: Environmental filtering of life-history trait diversity in urban populations of Arabidopsis thaliana
<p>The challenges to which plants are exposed in urban environments represent, in miniature, the challenges plants face as a result of global environmental change. Hence, urban habitats provide a unique opportunity to assess whether processes of local adaptation are taking place despite the short temporal and geographical scales that characterize the Anthropocene. We quantified the ecological diversity of urban habitats hosting A. thaliana populations. Using plant community indicators, we show that these patches differ in their levels of soil nutrient content and disturbance. Accordingly, plants in each patch displayed a range of flowering time, size and fitness. Using a deep sampling approach coupled with reduced genome-sequencing, we demonstrate that most individuals can be assigned to a limited set of clonal lineages; the genetic diversity of these lineages is a sample of the diversity observed in western European populations of the species, indicating that established urban populations originate from a broad regional pool of lineages. We assessed the genetic and phenotypic diversity of these lineages in a set of common garden experiments. We report marked genetic differences in life-history traits, including time of primary and secondary dormancy as well as of flowering. These genetic differences in life-history traits are not randomly distributed but sorted out by ecological differences among sites of origin.</p> <p>Synthesis: Our study shows that the genetically diverse phenology of a regional A. thaliana gene pool is not randomly distributed but filtered by heterogeneity in the urban environment. To out knowledge, this report is the first to show a pattern indicative of environmental filtering enhancing local genetic adaptation within urban environments. We conclude that environmental filtering helps maintain functional diversity within species.</p>
BioTechCOACH-ForALL: Development of Mental and Physical Exercise Systems, Clinical Recording, Supervisory Analytical Large-scale Data and Virtual Guidance of Vulnerable Population Groups
ClinicalTrials.gov study NCT03877328. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Normative Data of Hand Grip Strength in Healthy Adult Pakistani Population
ClinicalTrials.gov study NCT04648748. IPD Sharing: NO. Countries: 1. Publications: 5.
PPG to Predict Ejection Fraction and Other Echographic Data in the General Population
ClinicalTrials.gov study NCT04843371. IPD Sharing: Not stated. Countries: 1. Publications: 9.
High-quality Image (NIR and RGB) Dataset Synchronized With Contact Vital Sings Recordings and Clinical Data of Stratified Healthy Population. Algorithms and AI Models to Obtain a Set of Vital Signs Im
ClinicalTrials.gov study NCT05947721. IPD Sharing: NO. Countries: 1. Publications: 2.
Twenty Four Hour Ambulatory pH & Impedance Testing: Normative Data for Indian Population
ClinicalTrials.gov study NCT05004155. IPD Sharing: NO. Countries: 1. Publications: 4.
ScienceDex guides
Understand access before you commit
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.