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.
1,036
datasets available to search
ShareScore release 0.9.0
Dataset results
1,036 results for “Modernism”
Data from: Patterns of intraspecific variation through ontogeny–a case study of the Cretaceous nautilid Eutrephoceras dekayi and modern Nautilus pompilius
Open the record for dataset details and reuse information.
Data from: Applying modern coexistence theory to priority effects
Open the record for dataset details and reuse information.
Coupling gel electrophoresis with photoluminescence imaging reveals biochrome complexes in modern and fossil shells
Open the record for dataset details and reuse information.
Data from: Exploring the visual world of fossilized and modern fungus gnat eyes (Diptera: Keroplatidae) with X-ray microtomography
Open the record for dataset details and reuse information.
Data from: Modern pollen assemblages of the Neotropics
Open the record for dataset details and reuse information.
PLSS Forests Lost Compared to Modern Forests and Novel Modern Forsets Gained Compared to PLSS Forests, Upper Midwest: Level 1
EuroAmerican land use and its legacies have transformed forest structure and composition across the United States (US). More accurate reconstructions of historical states are critical to understanding the processes governing past, current, and future forest dynamics. Gridded (8x8km) estimates of pre-settlement (1800s) forests from the upper Midwestern US (Minnesota, Wisconsin, and most of Michigan) using 19th Century Public Land Survey System (PLSS) records provide relative composition, biomass, stem density, and basal area for 26 tree genera. This mapping is more robust than past efforts, using spatially varying correction factors to accommodate sampling design, azimuthal censoring, and biases in tree selection. We compare pre-settlement to modern forests using US Forest Service Forest Inventory and Analysis (FIA) data to show the prevalence of lost forests, pre-settlement forests with no current analogue, and novel forests, modern forests with no past analogs. Differences between PLSS and FIA forests are spatially structured as a result of differences in the underlying ecology and land use impacts in the Upper Midwestern United States. Modern biomass is higher than pre-settlement biomass in northern Minnesota, northwestern and south central Wisconsin along the former prairie-forest border through Minnesota that was largely open savanna and the Big Woods of Minnesota. PLSS biomass was higher than today in northern Wisconsin and upper and lower Michigan due to shifts in species composition and, presumably, average stand age. Modern forests are more homogeneous, and ecotonal gradients are more diffuse today than in the past. Novel forest assemblages represent 29% of all FIA cells, while 25% of pre-settlement forests no longer exist in a modern context. Lost forests are centered around the forests of the Tension Zone, particularly in hemlock dominated forests of north-central Wisconsin, and in oak-elm-basswood forests along the forest-prairie boundary in south central
Figure 1 in A fossil protein chimera; difficulties in discriminating dinosaur peptide sequences from modern cross-contamination
Figure 1. Tandem mass spectrum from high-resolution (HCD) fragmentation analysis of the peptide sequence (GPPGESGAVGPAGPIGSR) matched from our analysis of ostrich bone collagen that is homologous to the peptide proposed as unique to T. rex and B. canadensis.
Figure 2 in A fossil protein chimera; difficulties in discriminating dinosaur peptide sequences from modern cross-contamination
Figure 2. Tandem mass spectrum of the peptide sequence claimed as being endogenous to both dinosaurs with sequence (GLPGESGAVGPAGPPGSR) downloaded from the B. canadensis analysis by Schweitzer et al. [14].
Proceedings of 1st International Conference: Modern Information, Measurement and Control Systems: Problems and Perspectives (MIMCS'2019)
<p>International conference</p> <p>July 01-02 2019</p>
FIGURE 1. Fossils from Cumberland Bone Cave compared with modern taxa. A in The Irvingtonian Avifauna of Cumberland Bone Cave, Maryland
FIGURE 1. Fossils from Cumberland Bone Cave compared with modern taxa. A) fossil left humerus of Meleagris sp., USNM PAL 641969, caudal aspect; B) left humerus of Meleagris gallopavo, USNM BIRDS 556334 f, caudal aspect; C) fossil left humerus of Meleagris sp., USNM PAL 641067, caudal aspect; D) fossil right femur of Coragyps atratus, USNM PAL 641790, cranial aspect; E) right femur of C. atratus, USNM BIRDS 647499 m, cranial aspect; F) fossil proximal right carpometacarpus of fossil Branta dickeyi, USNM PAL 641972, ventral aspect; G) proximal right carpometacarpus of B. canadensis, USNM BIRDS 488182 m, ventral aspect; H) left tarsometatarsus of Falcipennis canadensis, USNM BIRDS 557527 f, plantar aspect; I) fossil left tarsometatarsus of Bonasa umbellus, USNM PAL 641979, plantar aspect; J) left tarsometatarsus of B. umbellus, USNM BIRDS 600360 f imm., plantar aspect; K) fossil left tarsometatarsus of Ectopistes migratorius, USNM PAL 769090, plantar aspect; L) tarsometatarsus of E. migratorius, USNM BIRDS 292904 (captive), plantar aspect; M) fossil left femur of Megascops guildayi, USNM PAL 769089, caudal aspect; N) left femur of Megascops asio, USNM 623630 f, caudal aspect; O) fossil right ulna of M. guildayi, USNM PAL 641984, ventral aspect; P) right ulna of M. asio, USNM BIRDS 623630 f, ventral aspect; Q) right tarsometatarsus of Perisoreus canadensis, USNM BIRDS 639077 f, dorsal aspect; R) fossil right tarsometatarsus of a species of jay (Corvidae, aff. Perisoreus/Cyanocitta), CM 24274, dorsal aspect; S) fossil right tarsometatarsus of a species of jay (Corvidae, aff. Cyanocitta/Perisoreus), USNM PAL 641989, dorsal aspect; T) right tarsometatarsus of Cyanocitta cyanea, USNM BIRDS 499504 f, dorsal aspect. Scale bar 1, for images A–G, = 2 cm. Scale bar 2, for images H–N, = 1 cm.
Betlada, Nilgiri Hills (Tamil Nadu). Two hero-stones embedded in a modern compound
<p>Former orthostats of disassembled dolmens.</p> <p>Date of record: 2019.</p>
Input files and setup for simulations of ancestral and modern glycosidases
<p>Input files, heme parameters, and representative structures from simulations of ancestral glycosidases and the modern glycosidase from the thermophilic <em>Halothermothrix orenii</em>. For details please see the README file provided.</p>
Modern pollen–plant diversity relationships inform palaeoecological reconstructions of functional and phylogenetic diversity in calcareous fens
<p>Predicting the trajectory of ongoing diversity loss requires knowledge of historical development of community assemblages. Long-term data from paleoecological investigations combined with key biodiversity measures in ecology such as taxonomic richness, functional diversity (FD), phylogenetic diversity (PD) and environmental factors expressed as Ellenberg indicator values (EIVs) could provide that knowledge. We explored the modern pollen–plant (moss polster pollen vs. surrounding vegetation) diversity relationships for herbaceous and woody taxa in calcareous fens from two different regions in Estonia, NE Europe. Associations of taxonomic richness, vegetation composition, FD (including functional alpha diversity and trait composition), PD and EIVs in modern pollen vs. plant data were studied with correlation analysis, Procrustes analysis and linear regression models. To test their potential use in palaeoreconstructions, diversity measures were applied on pollen data from Kanna spring fen reflecting fen vegetation development over the last nine millennia and diversity changes through time were studied using generalized additive models. Results showed significant pollen–plant richness correlations for herbaceous taxa at vegetation estimate scales up to 6 m radius and Procrustes analysis showed significant compositional associations at all plant estimate scales (up to 100 m). Woody taxa had no significant pollen–plant richness correlations but composition relationships were significant at plant estimate scales of 6–100 m. Traits that were best reflected by pollen data (both in terms of trait composition and functional alpha diversity) among woody and herbaceous taxa were seed number, clonality, SLA and LDMC. PD of herbaceous species was reflected by pollen data. Among the EIVs, Ellenberg L and T were significantly reflected by pollen data for both woody and herbaceous communities. Palaeoreconstruction from Kanna fen indicates that trends of woody taxa are mostly related to long-term changes in climate while diversity variables of herbaceous taxa closely follow autogenic processes within the fen. We suggest that pollen-based diversity estimates should be calculated separately for woody and herbaceous taxa as they clearly represent different spatial scales. Present study suggests that linking sedimentary pollen data with FD, PD and EIVs provides possibilities to examine long-term trends in community assembly and ecosystem processes that would be undetectable from traditional pollen diagrams.</p>
Data from: A diverse neornithine assemblage from the Cretaceous Atlantic coastline and the rise of modern avifaunas
Extant birds (Neornithes) are one of the most widespread and diverse vertebrate lineages, but their early evolution is poorly understood. Although molecular analyses contend that most major extant bird lineages diverged during a period of explosive radiation following the Cretaceous-Paleogene (K-Pg) extinction, several enigmatic fossils from the latest Mesozoic suggest that some clades evolved before the end of the Cretaceous. We describe a historically collected bird assemblage from the Atlantic coastline and conclusively demonstrate its latest Cretaceous age. Phylogenetic analyses show these fossils are assignable to neornithines, and many may represent early members of Galloanseres (ducks, chickens, and kin). These fossils comprise the most diverse Mesozoic neornithine fauna known. Several of these neornithines had massive body masses reaching or exceeding those of the largest known Mesozoic birds and indicate that at least one family of wading birds, the Presbyornithidae, may have persisted through the K-Pg extinction event.The pronounced size variation observed in this assemblage indicates that early neornithines inhabiting coastal ecosystems were highly diverse and displayed tropic specialization comparable to modern coastal avifaunas.
Timeline & Glossary of Events in modern China
<p>This dataset provides a list of the conventional expressions used to name events in modern Chinese history (1939-1949) in historical literature and other common sources such as internet web sites. It was established with the view to collect as complete as possible the expressions used in historical literature for data mining and NLP processing.</p> <p>The dataset is bilingual (English, Chinese). There are duplicates since the same event may have been labelled by different expressions.</p> <p>The dataset also provides the dates of events and can serve as a timeline of modern Chinese history.</p> <p><em><strong>Dataset prepared by the whole ENP-China Team</strong></em>.</p> <p> </p>
Data from: The evolution of the modern avian digestive system – insights from paravian fossils from the Yanliao and Jehol biotas
The avian digestive system, like other aspects of avian biology, is highly modified relative to other reptiles. Together these modifications have imparted the great success of Neornithes, the most diverse clade of amniotes alive today. It is important to understand when and how aspects of the modern avian digestive system evolved among neornithine ancestors in order to elucidate the evolutionary success of this important clade and to understand the biology of stem birds and their closest dinosaurian relatives – Mesozoic Paraves. Although direct preservation of the soft tissue of the digestive system has not yet been reported, ingested remains and their anatomical location preserved in articulated fossils hint at the structure of the digestive system and its abilities. Almost all data concerning direct evidence of diet in Paraves comes from either the Upper Jurassic Yanliao Biota or the Lower Cretaceous Jehol Biota, both which are known from deposits in north-eastern China. Here, the sum of the data gleaned from the thousands of exceptionally well-preserved fossils of paravians is interpreted with regards to the structure and evolution of the highly modified avian digestive system and feeding apparatus. This information suggests intrinsic differences between closely related stem lineages implying strong homoplasy and that the modern digestive system is limited to the crownward lineage.
Data from: Historical climatic instability predicts the inverse latitudinal pattern in speciation rate of modern mammalian biota
<p>Evolutionary rate explanations for latitudinal diversity gradients predict faster speciation and diversification rates in richer, older, and more stable tropical regions (climatic stability hypothesis). Numerous modern lineages have emerged in high latitudes, however, suggesting that climatic oscillations can drive population divergence, at least among extratropical species (glacial refugia hypothesis). This conflicting evidence suggests that geographical patterns of evolutionary rates are more complicated than previously thought.</p> <p>Here, we reconstructed the complex evolutionary dynamics of a comprehensive dataset of modern mammals, both terrestrial and marine. We performed global and regional regression analyses to investigate how climatic instability could have indirectly influenced contemporary diversity gradients through its effects on evolutionary rates. In particular, we explored global and regional patterns of the relationships between species richness and assemblage-level evolutionary rates and between evolutionary rates and climatic instability.</p> <p>We found an inverse relationship between evolutionary rates and species richness, especially in the terrestrial domain. Additionally, climatic instability was strongly associated with the highest evolutionary rates at high terrestrial latitudes, supporting the glacial refugia hypothesis there. At low latitudes, evolutionary rates were unrelated to climatic stability.</p> <p>The inverse relationship between evolutionary rates and the modern latitudinal diversity gradient casts doubt on the idea that higher evolutionary rates in the tropics underlie the current diversity patterns of modern mammals. Alternatively, the longer time spans for diversity to accumulate in the older and more stable tropics (and not high diversification rates) may explain the latitudinal diversity gradient.</p>
Conference Proceedings of The First International Scientific-Practical Conference- "Modern Tendencies of Dialogue in Multidenominational Society: philosophical, religious, legal view"
<p>Scientific conference</p>
Data from: The effect of weathering on bird bone survivorship in modern and fossil saline-alkaline lake environments
A modern Lesser Flamingo (Phoeniconaias minor) assemblage was collected along the shoreline of Lake Emakat, a saline-alkaline lake in northern Tanzania. Taphonomic analysis found the assemblage to be heavily weathered. This is likely due to the bone's heightened exposure to solar radiation and corrosive soil and water chemistries, as is expected to occur in such depositional environments. Analysis found that deep, wide, longitudinal cracks penetrate the medullar cavities of both weathered and unweathered long bones. The cause and taphonomic consequence of these cracks are addressed here, using data from Lake Emakat and from controlled studies. Results support repeated (episodic) submersion, followed by drying, as the causal mechanism behind these wet-dry cracks. Mineral salt uptake by bone may explain the early appearance and prevalence of these cracks in saline-alkaline lake settings, as compared to other depositional settings. The rate of weathering and incidence of wet-dry cracking varies significantly across limb elements. This difference correlates to element specific resistance properties to external loading forces. Heavy weathering weakens the structural integrity of bone and can accelerate its fragmentation. This can lead to bird bone loss in nearshore and ephemeral wetland settings, which may then affect resulting skeletal part, diversity, and richness profiles. Heavy weathering can therefore obscure important taphonomic and paleoecological information. The weathering data collected here are then applied to a fossil bird assemblage from the FLK Complex, (late Pliocene), Olduvai Gorge, in Tanzania. Results provide evidence for the effect of weathering on paleoecological and behavioral interpretations. Weathering should be considered when analyzing fossil bird assemblages.
Data from: Inferring skeletal production from time-averaged assemblages: skeletal loss pulls the timing of production pulses towards the modern period
Age-frequency distributions of dead skeletal material on the landscape or seabed—information on the time that has elapsed since the death of individuals—provide decadal- to millennial-scale perspectives both on the history of production and on the processes that lead to skeletal disintegration and burial. So far, however, models quantifying the dynamics of skeletal loss have assumed that skeletal production is constant during time-averaged accumulation. Here, to improve inferences in conservation paleobiology and historical ecology, we evaluate the joint effects of temporally variable production and skeletal loss on postmortem age-frequency distributions (AFDs) to determine how to detect fluctuations in production over the recent past from AFDs. We show that, relative to the true timing of past production pulses, the modes of AFDs will be shifted to younger age cohorts, causing the true age of past pulses to be underestimated. This shift in the apparent timing of a past pulse in production will be stronger where loss rates are high and/or the rate of decline in production is slow; also, a single pulse coupled with a declining loss rate can, under some circumstances, generate a bimodal distribution. We apply these models to death assemblages of the bivalve Nuculana taphria from the Southern California continental shelf, finding that: (1) an onshore-offshore gradient in time averaging is dominated by a gradient in the timing of production, reflecting the tracking of shallow-water habitats under a sea-level rise, rather than by a gradient in disintegration and sequestration rates, which remain constant with water depth; and (2) loss-corrected model-based estimates of the timing of past production are in good agreement with likely past changes in local production based on an independent sea-level curve.
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.