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535 results for “quaternary”
Assembly, persistence, and disassembly dynamics of Quaternary Caribbean frugivore communities
<p>How communities assemble and restructure is of critical importance to ecological theory, evolutionary theory, and conservation, but long-term perspectives on the patterns and processes of community assembly are rarely integrated into traditional community ecology, and the utility of communities as an ecological concept has been repeatedly questioned in part due to a lack of temporal perspective. Through a synthesis of paleontological and neontological data, I reconstruct Caribbean frugivore communities over the Quaternary (2.58 mya – present). Numerous Caribbean frugivore lineages arise during periods coincident with the global origins of plant-frugivore mutualisms. The persistence of many of these lineages into the Quaternary is indicative of long-term community stability, but an analysis of Quaternary extinctions reveals a non-random loss of large-bodied mammalian and reptilian frugivores. Anthropogenic impacts, including human niche construction, underlie the recent reorganization of frugivore communities, setting the stage for continued declines and evolutionary responses in plants that have lost mutualistic partners. These impacts also support ongoing and future introductions of invader complexes: introduced plants and frugivores that further exacerbate native biodiversity loss by interacting more strongly with one another than with native plants or frugivores. This work illustrates the importance of paleontological data and perspectives in conceptualizing ecological communities, which are dynamic and important entities.</p>
Dataset for "Stability and electronic properties of planar defects in quaternary I2-II-IV-VI4 semiconductors"
<p>We are grateful to the UK Materials and Molecular Modelling Hub for computational resources, which is partially funded by EPSRC (EP/P020194/1). The research was supported by the Royal Society and the EU Horizon2020 Framework (STARCELL, Grant No. 720907). J.-S.P. thanks the Royal Society for Shooter International Fellowship.</p>
Data-driven discovery of photoactive quaternary oxides: dataset
<p>Dataset required for the analysis at <a href="https://github.com/WMD-group/Solar_oxides_data">this repository</a>. The link to the original publication pertaining to this dataset is available in the repository. The dataset consists of:</p> <ul> <li>Quaternary oxide compositions generated by SMACT and featurized using the Matminer package (All_oxide_comps_dataframe_featurized.csv)</li> <li>Quaternary oxide compositions predicted to have a bandgap within the target window of 1.75 +/- 0.02 eV by a gradient boosting regression model, as used in the original publication. (Useful_BGs_published.csv)</li> <li>Crystal structures upon which first-principles (DFT) calculations were carried out in the original publication (structures_published.json)</li> <li>VASP files for compounds upon which first-principles (hybrid DFT) calculations were carried out in the original publication</li> </ul>
FIGURE 9 in Balaenoptera edeni skull from the Holocene (Quaternary) of Osaka City, Japan
FIGURE 9. Posterior part of skull, OMNH-QV4816 in right lateral view. Top, photo. Bottom, line art.
FIGURE 6 in Balaenoptera edeni skull from the Holocene (Quaternary) of Osaka City, Japan
FIGURE 6. Posterior part of skull, OMNH-QV4816 in ventral view. Top, photo. Bottom, line art.
FIGURE 5 in Balaenoptera edeni skull from the Holocene (Quaternary) of Osaka City, Japan
FIGURE 5. Posterior part of skull, OMNH-QV4816 in dorsal view. Top, photo. Bottom, line art.
FIGURE 8 in Balaenoptera edeni skull from the Holocene (Quaternary) of Osaka City, Japan
FIGURE 8. Posterior part of skull, OMNH-QV4816 in posterior view. Top, photo. Bottom, line art.
FIGURE 7 in Balaenoptera edeni skull from the Holocene (Quaternary) of Osaka City, Japan
FIGURE 7. Posterior part of skull, OMNH-QV4816 in anterior view. Top, photo. Bottom, line art.
FIGURE 2 in A new genus and species of Muridae (Rodentia) from the Quaternary deposits of the Denizli Basin, South-western Turkey
FIGURE 2. Dental terminology of murid upper and lower molars (after Lazzari et. al., 2010).
Supplementary data and code to "Cellular location shapes quaternary structure of enzymes" by György Abrusán and Aleksej Zelezniak
<p>Scripts and high-level data to reproduce the figures and supplementary figures of "Cellular location shapes quaternary structure of enzymes" by György Abrusán and Aleksej Zelezniak. <em>Nature Communications</em> (2024) 15:8505.</p>
Data from: The first pre-Quaternary fossil record of the clade Mabuyidae with a comment on the enclosure of the Meckelian canal in skinks
We here describe the first Neogene record of the squamate clade Mabuyidae. Although this clade has a cosmopolitan distribution today, no pre-Quarternary fossil record of these reptiles has so far been documented. The material comes from the locality Solnechnodolsk (Russia) and is dated to the late Miocene (MN 13). Although it comprises only jaw elements, it constitutes the first evidence of the occurrence of fossil skinks around the area of the Black Sea. The material is identical to Heremites vittatus, showing the existence of this lineage as early as the late Miocene. Thus, it may be used as a potential calibration point for further studies. The comparative anatomy of the structures of lower jaw in selected scincomorph taxa with a special reference to Mabuya group is presented. The closure of the Meckelian canal is the condition at the basal node of the clade Sphenomorphidae + Eugongylidae + Egerniidae + Mabuyidea, whereas the closed canal in Acontias (Acontidae) evolved independently. However, Sphenomorphidae (Asymblepharus and Scincella) + Eugongylidae (Ablepharus) retain a large anterior opening of the Meckelian canal, whereas only a small opening characterizes the basal node of Egerniidae and Mabuyidae, except for H. vittatus and H. septemtaeniatus. The closure of the Meckelian canal in these two taxa is less well developed in comparison with other mabuyid skinks. Thus, a heterochronic pedomorphic process might have played a role in the evolution of these skinks. The Meckelian canal condition supports the monophyly of Heremites.
FIG. 12 in Quaternary and Recent shells of Ocenebra erinaceus (Linnaeus, 1758) and O. brevirobusta Houart, 2000 (Mollusca, Muricidae, Ocenebrinae): reflections on the intra- and interspecific variations
FIG. 12. — Favourite phylogenetic hypothesis.
Text-fig. 4. The Ahlen mammoth in its new mount of 2016. GMM A5N.383 (photo: Oliver Kunze). in Everything Is A Question Of Time - Age Of Important Quaternary Palaeontological Finds From Westphalia
Text-fig. 4. The Ahlen mammoth in its new mount of 2016. GMM A5N.383 (photo: Oliver Kunze).
Text-fig. 5. Fragment of the musk-ox skull from Herne-Crange. GMM A5.53. Scale bar 5 cm. in Everything Is A Question Of Time - Age Of Important Quaternary Palaeontological Finds From Westphalia
Text-fig. 5. Fragment of the musk-ox skull from Herne-Crange. GMM A5.53. Scale bar 5 cm.
Text-fig. 3. Third definite molar of the Ahlen mammoth. GMM A5N.412. Scale bar 5 cm. in Everything Is A Question Of Time - Age Of Important Quaternary Palaeontological Finds From Westphalia
Text-fig. 3. Third definite molar of the Ahlen mammoth. GMM A5N.412. Scale bar 5 cm.
FIGURE 4 in Oribatid mite fossils from pre-Quaternary sediments in Slovenian caves III. Two new species of Dissorhina (Oppiidae) from the Pliocene
FIGURE 4: Dissorhina paleokrasica n. sp., photographs of holotype: A – dorsal view (scale bar applicable to A-C); B – lateral view; C – (latero-)ventral view; D – detail of sensillus; E – rostrum and gnathosoma in lateral view; F – anal plates; G – epimeral area and genital plate. Acronyms: ss – sensillus, ct – central tooth of the rostrum, rest are names of setae aligned to their insertions. Photos courtesy of Jan Mourek.
FIGURE 3 in Oribatid mite fossils from pre-Quaternary sediments in Slovenian caves III. Two new species of Dissorhina (Oppiidae) from the Pliocene
FIGURE 3: Dissorhina nuda n. sp.: A – dorsal view of holotype; B – ventral view of holotype; C – detail of rostrum, dorsal view; D – bothridial area with sensillus; E – detail of rostrum, lateral view. Scale bar: A,B – 100 µm, D – 50 µm. Acronyms: bo – bothridium, ctr – central tooth of rostrum, ibt – interbothridial tubercle, ltr – lateral tooth of rostrum, pbt – postbothridial tubercle, pt I – pedotectum I, pt II – pedotectum II, ss – sensillus, tr III – trochanter of leg III, tr IV – trochanter of leg IV. Setae (or their insertions) are labelled by name.
FIGURE 5 in Oribatid mite fossils from pre-Quaternary sediments in Slovenian caves III. Two new species of Dissorhina (Oppiidae) from the Pliocene
FIGURE 5: Dissorhina nuda n. sp., photographs of holotype: A – dorsal view (scale bar applicable to all photos except details on C and E); B – ventral view; C – rostrum of holotype in detail (ventral view). Dissorhina paleokrasica n. sp., photographs of paratype: D – laterodorsal view; E – ventral view (rostral part enlarged in small frame). Acronyms: bo – bothridium, cos – lamellar costula, ct – central tooth of the rostrum, dis – discidium, ibt – interbothridial sclerite (tubercle), lc – lateral carina of prodorsum, lt – lateral tooth of the rostrum, pbt – postbothridial sclerite (tubercle), ptI – pedotectum I, ptII – pedotectum II, ss – sensillus, trIII – trochanter of leg III, trIV – trochanter of leg IV, rest are names of setae aligned to their insertions. Photos courtesy of Oana Moldovan (C) and Jan Mourek (rest).
FIGURE 1 in Oribatid mite fossils from pre-Quaternary sediments in Slovenian caves III. Two new species of Dissorhina (Oppiidae) from the Pliocene
FIGURE 1: Dissorhina paleokrasica n. sp.: A – dorsal view of holotype; B – dorsal view of paratype; C – detail of the prodorsum of paratype. Scale bar: A, B – 100 µm, C – 50 µm. Acronyms: bo – bothridium, cos – lamellar costula, ctr – central tooth of rostrum, ibt – interbothridial tubercle, lc – lateral carina, ltr – lateral tooth of rostrum, pbt – postbothridial tubercle, pt I – pedotectum I, pt II – pedotectum II, ss – sensillus. Setae are labeled by name.
FIGURE 2 in Oribatid mite fossils from pre-Quaternary sediments in Slovenian caves III. Two new species of Dissorhina (Oppiidae) from the Pliocene
FIGURE 2: Dissorhina paleokrasica n. sp.: A – ventral view; B – sensillus; C – prodorsal setae; D – notogastral setae; E – leg I. Scale bar: A – 100 µm, B–E – 50 µm. Acronyms: tr III – trochanter of leg III, tr IV – trochanter of leg IV. Setae and lyrifissurae are labelled by name.
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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.