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.
338
datasets available to search
ShareScore release 0.9.0
Dataset results
338 results for “Geographic ranges”
Supplementary information for: The effects of geographic range size and abundance on extinction during a time of 'sluggish' evolution
<p>Geographic range size and abundance are important determinants of extinction risk in fossil and extant taxa. However, the relationship between these variables and extinction risk has not been tested extensively during evolutionarily 'quiescent' times of low extinction and speciation in the fossil record. Here we examine the influence of geographic range size and abundance on extinction risk during the late Paleozoic (Mississippian–Permian), a time of 'sluggish' evolution when global rates of origination and extinction were roughly half those of other Paleozoic intervals. Analyses used spatio-temporal occurrences for 164 brachiopod species from the North American midcontinent. We found abundance to be a better predictor of extinction risk than measures of geographic range size. Moreover, species exhibited reductions in abundance prior to their extinction, but did not display contractions in geographic range size. The weak relationship between geographic range size and extinction in this time and place may reflect the relative preponderance of larger-ranged taxa, combined with the physiographic conditions of the region that allowed for easy habitat tracking that dampened both extinction and speciation. These conditions led to a prolonged period (19 – 25 Myr) during which standard macroevolutionary rules did not apply.</p>
Defensive spines are associated with large geographic range but not diversification in spiny ants (Hymenoptera: Formicidae: Polyrhachis)
<p>Several prominent evolutionary theories propose mechanisms whereby the evolution of a defensive trait or suite of traits causes significant shifts in species diversification rate and niche evolution. We investigate the role of cuticular spines, a highly variable morphological defensive trait in the hyperdiverse ant genus <em>Polyrhachis</em>, on species diversification and geographic range size. Informed by key innovation theory and the escape-and-radiate hypothesis, we predicted that clades with longer spines would exhibit elevated rates of diversification and larger range sizes compared to clades with shorter spines. To address these predictions, we estimated phylogenetic relationships with a phylogenomic approach utilizing ultra-conserved elements (UCEs) and compiled morphological and biogeographic trait databases. In contrast to the first prediction, we found no association between diversification rate and any trait (spine length, body size, and range size). However, we recovered a positive correlation between spine length and geographic range size, suggesting that spines promote expanded geographic range. Notably, these results were consistent across analyses using different phylogenetic inference approaches and spine trait measurement schemes. This study provides a rare investigation of the role of a defensive trait on geographic range size, and ultimately supports the hypothesis that defensive spines are a factor in increased range size in <em>Polyrhachis</em> ants. Furthermore, the lack of support for an association between spines and diversification, which contrasts with previous work demonstrating a positive association between spines and diversification rate, is intriguing and warrants further study.</p>
Fig. 2 in Interspecific Interactions as a Factor of Limitation of Geographical Distribution: Evidence Obtained by Modeling Home Ranges of Vole Twin Species Microtus Arvalis – M. Levis (Rodentia, Microtidae)
Fig. 2. Potential distribution of the East European vole (Microtus levis). Captions as in fig.1.
Data from: Coyote diet in North America: geographic and ecological patterns during range expansion
<p>This dataset was used to review and analyze coyote diets across North America in "Coyote diets in North America: geographic and ecological patterns during range expansion" by Jensen et al. in Mammal Review. We only include data from studies that reported data as percent frequency of occurrence and from multiple seasons. We ultimately used 93 of the included studies (294 seasonal records) in our analyses.</p>
Figure 3 in Extending the geographic and altitudinal range of Popilius gibbosus (Burmeister, 1847) (Coleoptera: Passalidae) with taxonomical comments
Figure 3. Geographical distribution of Popiliusgibbosus (Burmeister, 1847) in South America, with previous and new records.
Figure 2 in Extending the geographic and altitudinal range of Popilius gibbosus (Burmeister, 1847) (Coleoptera: Passalidae) with taxonomical comments
Figure 2. Popilius gibbosus (Burmeister, 1847). (A) Head and prothorax, dorsal; (B) Head, ventral (C) Head and prothorax, dorsolateral; (D) Prosternal process and mesosternum; (E) Metasternum (left side); (F) Aedeagus (ventral, dorsal and lateral view).
Divided by the range: evidence for geographic isolation of the highly mobile Emu (Dromaius novaehollandiae)
<p>Conserving evolutionary processes is becoming increasingly important in conservation management as environmental changes threaten wild populations. Characterising genetically distinct populations and assessing connectivity across the landscape enables wildlife managers to prioritise conservation efforts with limited resources. In the NSW North Coast bioregion of Australia, one of the last remaining coastal populations of the Emu (<em>Dromaius novaehollandiae</em>) has been state-listed as an Endangered Population, owing to its geographic isolation and small census size. Using mitochondrial and nuclear genetic markers, we examined the spatial genetic structure of Emus across south-eastern Australia and assessed the effective population size (<em>N</em><sub><em>e</em></sub>) and genetic diversity of the NSW North Coast Emu to inform management. We show significant genetic divergence between the NSW North Coast Emu and other localities based on thousands of highly resolving nuclear markers, which was not explained by geographic distance. Among NSW North Coast Emus, we found less genetic diversity and a critically low effective population size (<em>N</em><sub><em>e</em></sub> = 14.84 and 22.49 based on independent methods). Together, these findings suggest that the NSW North Coast Emu is at risk of further losses of genetic diversity and inbreeding depression. Incorporating genetic data into the design of captive-release and translocation projects would refine management plans for this locally important population and monitor risks to its long-term survival.</p>
Data and code from: Birds optimize fruit size consumed near their geographic range limits
<p>This dataset is <a href="https://doi.org/10.5061/dryad.931zcrjs5">available from Dryad</a>. </p>
Data from: Is adaptation associated with long-term persistence beyond a geographic range limit?
<p>Adaptation to new habitats might facilitate species' range shifts in response to climate change. In 2005, we transplanted experimental populations of coastal dune plant <em>Camissoniopsis cheiranthifolia </em>into four sites within and one site beyond its poleward range limit. Beyond-range transplants had high fitness and often delayed reproduction. To test for adaptation associated with experimental range expansion, we transplanted descendants from beyond and within-range populations after 10 generations <em>in situ</em> into two sites within the range, one at the range edge, and two sites beyond the range. We expected to detect adaptation to beyond-range conditions due to substantial genetic variation within experimental populations and environmental variation among sites. However, individuals from beyond-range experimental populations were not fitter than those from within the range when planted at either beyond-range site, indicating no adaptation to the beyond-range site or beyond-range environments in general. Beyond-range descendants also did not suffer lower fitness within the range. Although reproduction was again delayed beyond the range, late reproduction was not favored more strongly beyond than within the range, and beyond-range descendants did not delay reproduction more than within-range descendants. Persistence in beyond-range environments may not require adaptation, which could allow a rapid response to climate change.</p>
Fig. 2 in SHORT COMMUNICATION Noblella lynchi Duellman 1991 (Anura: Craugastoridae): Geographic range extension, Peru
Fig. 2. Map showing distribution of Noblella lynchi in the Cordillera Central in northern Peru.
Figure 1 in New adult host records for three Buprestidae (Coleoptera) rarely encountered in the United States and significant extension of the known geographic range of Agrilus pilosicollis Fisher
Figure 1. Agrilus langei Obenberger ♂. a) Dorsal view. b) Ventral view. c) Lat-
Additional climate information for research paper «Ecological and Geographical Analysis of Distribution of Heracleum persicum, H. mantegazzianum and H. sosnowskyi on The Northern Limit of Its Invaded Range in Europe» submitted to Russian Journal of Biological Invasions
<p><strong>Additional climate information for research paper «Ecological and Geographical Analysis of Distribution of Heracleum persicum, H. mantegazzianum and H. sosnowskyi on The Northern Limit of Its Invaded Range in Europe» submitted to Russian Journal of Biological Invasions </strong></p>
Selfing rate variation within species is unrelated to life-history traits or geographic range position
<p>Premise: In plants, populations and species vary widely along the continuum from outcrossing to selfing. Life-history traits and ecological circumstances influence among-species variation in selfing rates but their general role in explaining intraspecific variation is unknown. Using a database of plant species, we test whether life-history traits, geographic range position, or abundance predict selfing rate variation among populations. </p> <p>Methods: We identified species where selfing rates were estimated in at least three populations at known locations. Two key life-history traits (generation time and growth form) were used to predict within-species selfing rate variation. Populations sampled within a species' native range were assessed for proximity to the nearest edge and abundance. Finally, we conducted linear and segmented regressions to determine functional relationships between selfing rate and geographic range position within species.</p> <p>Key results: While woody species exhibit lower variation in selfing rates compared to herbs, this is explained by the lower average selfing rate of woody species. Relationships between selfing and peripherality or abundance significantly varied among species in their direction and magnitude. However, there was no general pattern of increased selfing towards range edges. A power analysis shows that tests of this hypothesis require studying many (i.e. 40+) populations.</p> <p>Conclusions: Intraspecific variation in plant mating systems is often substantial yet remains difficult to explain. Beyond sampling more populations, future tests of biogeographic hypotheses will benefit from phylogeographic information concerning specific range edges, the study of traits influencing mating system (e.g. herkogamy), and measures of abundance at local scales (e.g. population density).</p>
Data for: Geographic isolation reduces genetic diversity of a wide-ranging terrestrial vertebrate, Canis lupus
<p>Genetic diversity is theorized to decrease in populations closer to a species' range edge, where habitat may be suboptimal. However, generalist species capable of long-range dispersal may maintain sufficient gene flow to counteract this, though the presence of significant barriers to dispersal (e.g., large water bodies, human-dominated landscapes) may still lead to, and exacerbate, the edge effect. We used microsatellite data for 2,426 gray wolves (<em>Canis</em> <em>lupus</em>) from 24 sub-populations (groups) to model how allelic richness and expected heterozygosity varied with two measures of range edge (mainland-island position, latitude, and distance from range center) across >7.3 million km<sup>2</sup> of northern North America. We found that allelic richness and expected heterozygosity of island groups was measurably less than that of mainland groups and that these differences increased with the island's distance to the species' range center in the study area. Our results demonstrate how multiple axes of geographic isolation (distance from range center and island habitation) can act synergistically to erode the genetic diversity of wide-ranging terrestrial vertebrate populations despite the counteracting influence of long-range dispersal ability. These findings emphasize how geographic isolation is a potential threat to the genetic diversity and viability of terrestrial vertebrate populations even among species capable of long-range dispersal. </p> <p>This dataset is comprised of four separate sub-datasets, sourced from Carmichael et al. (2007), Musiani et al. (2007), McNay (2006), and a manuscript in progress (referred to as "MacNulty" in the data files, to be first published in Frevol et al. 2023). The raw data are comprised of sample IDs, latitude and longitude points indicating where the sample was collected or recorded, and microsatellite genetic information. To aid in re-use, the raw genetic data has also been formatted and presented for use with common population genetics software (Genepop, MICROCHECKER, Genetix, FSTAT). The dataset also includes spatial data files of the sub-populations described in the study, allelic richness and expected heterozygosity data derived from the raw and spatial data, and the R script used to create the models. </p> <ul> <li>Carmichael LE, Krizan J, Nagy JA, et al (2007) Historical and ecological determinants of genetic structure in arctic canids. Molecular Ecology 16:3466–3483. https://doi.org/10.1111/j.1365-294X.2007.03381.x</li> <li>McNay ME (2006) Preliminary results of parentage analysis using microsatellite markers from an exploited wolf population in central Alaska. Alaska Department of Fish and Game, Division of Wildlife Conservation, Juneau, Alaska</li> <li>Musiani M, Leonard JA, Cluff HD, et al (2007) Differentiation of tundra/taiga and boreal coniferous forest wolves: genetics, coat colour and association with migratory caribou. Molecular Ecology 16:4149–4170. https://doi.org/10.1111/j.1365-294X.2007.03458.x</li> </ul>
Geographic patterns in range sizes and their drivers of endemic angiosperms in China
<p><span>Geographic range size of endemic species is the most important indicator of</span><span> species' vulnerability to extinction and conservation prioritization, yet </span><span>variation in </span><span>range size among species and across space has been relatively underst</span><span>udied</span><span>. We investigated the variations and geographic patterns of the range sizes of 9,898 angiosperm species endemic to China and compared them with effects of historical and contemporary climate, physiological tolerances of species and species functional traits associated with dispersal ability (including growth form, fruit type and sexual system) on range size variations</span><span>. Our </span><span>results revealed </span><span>that</span><span> narrow-ranged species are clustered</span> <span>in Southwest China where angiosperm species richness peaks. Winter temperature had the strongest and most negative effects on the range size variations of narrow-ranged species across space and species, while climate seasonality had the strongest and most positive effects on the range size variations of wide-ranged species across space and species. Climate also influenced species range size indirectly via its effects on species' functional traits associated with dispersal ability. Range size of all species, narrow-ranged, and wide-ranged species showed little phylogenetic signal, suggesting that phylogenetic conservatism plays a very weak role in range size variations. Our results show that the range size of angiosperm species endemic to China is driven by both extrinsic spatio-temporal environmental factors and intrinsic species' traits that allow species to cope with environment change.</span></p>
Data from: Gene flow in the anemone Anthopleura elegantissima limits signatures of local adaptation across an extensive geographic range
Open the record for dataset details and reuse information.
Data from: How climate extremes—not means—define a species' geographic range boundary via a demographic tipping point
Open the record for dataset details and reuse information.
Divided by the range: evidence for geographic isolation of the highly mobile Emu (Dromaius novaehollandiae)
Open the record for dataset details and reuse information.
Selfing rate variation within species is unrelated to life-history traits or geographic range position
Open the record for dataset details and reuse information.
Geographic patterns in range sizes and their drivers of endemic angiosperms in China
Open the record for dataset details and reuse information.
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.