Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
32
datasets available to search
ShareScore release 0.9.0
Dataset results
32 results for “Population Collapse”
Data from: Local population collapse of Ross's and lesser snow geese driven by failing recruitment and diminished philopatry
Open the record for dataset details and reuse information.
Data from: Persisting in defaunated landscapes: reduced plant population connectivity after seed dispersal collapse
Open the record for dataset details and reuse information.
Population collapse in viviparid gastropods of the Lake Victoria ecoregion started before the Last Glacial Maximum
Open the record for dataset details and reuse information.
Environmental metadata for: Limited genomic signatures of population collapse in the critically endangered black abalone (Haliotis cracherodii)
Open the record for dataset details and reuse information.
Evolutionary rate and genetic load in an emblematic Mediterranean tree following an ancient and prolonged population collapse
Severe bottlenecks significantly diminish the amount of genetic diversity and the speed at which it accumulates (i.e. evolutionary rate). They further compromise the efficiency of natural selection to eliminate deleterious variants, which may reach fixation in the surviving populations. Consequently, expanding and adapting to new environments may pose a significant challenge when strong bottlenecks result in genetic pauperization. Herein, we surveyed the patterns of nucleotide diversity, molecular adaptation and genetic load across hundreds of loci in a circum-Mediterranean conifer (<i>Pinus pinea</i> L.) that represents one of the most extreme cases of genetic pauperization in widespread outbreeding taxa. We found very little genetic variation in both hypervariable non-coding (nuSSRs) and gene-coding loci, which translated into genetic diversity estimates one order of magnitude lower than those previously reported for pines. Such values were consistent with a strong population decline that began some ~1Ma. Comparisons with the related and partially parapatric maritime pine revealed reduced rates of adaptive evolution (<i>α</i> and <i>ω</i><sub>a</sub>) and a significant accumulation of genetic load. These did not appear to result from differences in mutation rates or linkage disequilibrium between the two species; instead they are the likely outcome of contrasting demographic histories affecting both the speed at which these taxa accumulate genetic diversity, and the global efficacy of selection. Future studies, and programs for conservation and management, should thus start testing for the effects of genetic load on fitness and integrating such effects into predictive models.
Data from: Invasive pathogen drives host population collapse: effects of a travelling wave of sarcoptic mange on bare-nosed wombats
1.Emerging and invasive pathogens can have long-lasting impacts on susceptible wildlife populations, including localised collapse and extirpation. Management of threatening disease is of widespread interest and requires knowledge of spatiotemporal patterns of pathogen spread. 2.Theory suggests disease spread often occurs via two patterns: homogenous mixing and travelling waves. However, high resolution empirical data demonstrating localised (within population) disease spread patterns are rare. 3.This study examined the spread of sarcoptic mange (aetiological agent Sarcoptes scabiei) in a population of bare-nosed wombats (Vombatus ursinus), and investigated whether pathogen spread occurred by homogenous mixing or a travelling wave. 4.Using seven years of population surveys and four years of disease severity surveys, we show that mange was first detected in the east of a wombat population in northern Tasmania, and progressed westward as a travelling wave. Wombat mortality rates reached 100% behind the wave, with a 94% decline in overall wombat abundance within the park. 5.Synthesis and applications. Globally distributed pathogens may have severe impacts on susceptible host species. This is the first study to quantify population level impacts of sarcoptic mange upon bare-nosed wombats, showing a wave of mange disease which resulted in a dramatic population decline. Successful management of the spread of this and similar pathogens may hinge on the capacity to establish transmission barriers at local or between-population scales.
Evolutionary rate and genetic load in an emblematic Mediterranean tree following an ancient and prolonged population collapse
Open the record for dataset details and reuse information.
Data from: Invasive pathogen drives host population collapse: effects of a travelling wave of sarcoptic mange on bare-nosed wombats
Open the record for dataset details and reuse information.
Data from: Genetic and life-history changes associated with fisheries-induced population collapse
Open the record for dataset details and reuse information.
Data from: Generic indicators for loss of resilience before a tipping point leading to population collapse
Theory predicts that the approach of catastrophic thresholds in natural systems (e.g., ecosystems, the climate) may result in an increasingly slow recovery from small perturbations, a phenomenon called critical slowing down. We used replicate laboratory populations of the budding yeast Saccharomyces cerevisiae for direct observation of critical slowing down before population collapse. We mapped the bifurcation diagram experimentally and found that the populations became more vulnerable to disturbance closer to the tipping point. Fluctuations of population density increased in size and duration near the tipping point, in agreement with the theory. Our results suggest that indicators of critical slowing down can provide advance warning of catastrophic thresholds and loss of resilience in a variety of dynamical systems.
Data from: Generic indicators for loss of resilience before a tipping point leading to population collapse
Open the record for dataset details and reuse information.
Population collapse of habitat-forming species in the Mediterranean: a long-term study of gorgonian populations affected by recurrent marine heatwaves
<p>This dataset contains the data and code associated to the manuscript "Population collapse of habitat-forming species in the Mediterranean: a long-term study of gorgonian populations affected by recurrent marine heatwaves."</p> <p>Understanding the resilience of temperate reefs against the increasingly frequent marine heatwaves (MHWs) requires exploring the recovery capacity of their key habitat-forming species. Here, we show that, in a Mediterranean highly enforced Marine Protected Area established more than 40 years ago, the habitat-forming octocoral populations that were affected by the 2003-MHW have not recovered after 15 years. Contrarily, they have followed collapse trajectories that have brought them to the brink of local ecological extinction. Since 2003, impacted populations of the red gorgonian Paramuricea clavata (Risso, 1826) and the red coral Corallium rubrum (Linnaeus, 1758) have followed different trends in terms of size structure, but a similar progressive reduction in density and biomass. Concurrently, recurrent MHWs were observed in the area during the 2003-2018 study period, what may have hindered any chance of populations recovery. Since Mediterranean habitat-forming octocorals play a unique role in the functioning of coralligenous assemblages, our results underpin the great risk that recurrent MHWs pose for the long-term integrity and functioning of these emblematic temperate reefs.</p>
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.