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1,018 results for “past”
Data from: Temperate radiations and dying embers of a tropical past: the diversification of Viburnum
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Data from: Ecological co-associations influence species’ responses to past climatic change: an example from a Sonoran Desert bark beetle
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Quantifying temporal variation in dietary niche to reveal drivers of past population declines; stable isotope, harvest trends, and land use
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Data from: Past tree influence and prescribed fire mediate biotic interactions and community reassembly in a grassland-restoration experiment
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Ecological niche modelling to project past, current and future distributional shift of black ebony tree (Diospyros melanoxylon Roxb.) in India
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Reconstructing squamate biogeography in Afro-Arabia reveals the influence of a complex and dynamic geologic past
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Climatic History of the Northeastern United States During the Past 3000 Years
These data are used in the publication: Marlon et al. (Accepted). Climatic history of the northeastern United States during the past 3000 years. Climate of the Past. Many ecosystem processes that influence Earth system feedbacks – vegetation growth, water and nutrient cycling, disturbance regimes – are strongly influenced by multidecadal- to millennial-scale climate variations that cannot be directly observed. Paleoclimate records provide information about these variations, forming the basis of our understanding and modeling of them. Fossil pollen records are abundant in the NE US, but cannot simultaneously provide information about paleoclimate and past vegetation in a modeling context because this leads to circular logic. If pollen data are used to constrain past vegetation changes, then the remaining paleoclimate archives in the northeastern US (NE US) are quite limited. Nonetheless, a growing number of diverse reconstructions have been developed but have not yet been examined together. Here we conduct a systematic review, assessment, and comparison of paleotemperature and paleohydrological proxies from the NE US for the last 3000 years. Regional temperature reconstructions (primarily summer) show a long-term cooling trend (1000 BCE–1700 CE) consistent with hemispheric-scale reconstructions, while hydroclimate data show gradually wetter conditions through the present day. Multiple proxies suggest that a prolonged, widespread drought occurred between 550 and 750 CE. Dry conditions are also evident during the Medieval Climate Anomaly, which was warmer and drier than during the Little Ice Age and drier than today. There is some evidence for an acceleration of the longer-term wetting trend in the NE US during the past century; coupled with an abrupt shift from decreasing to increasing temperatures in the past century, these changes could have wide-ranging implications for species distributions, ecosystem dynamics, and extreme weather events. More work is needed to ga
Water isotope data for "Simulation of early Eocene water isotopes using an Earth system model and its implication for past climate reconstruction"
<p><strong>iCESM1.2 simulated seawater oxygen isotopes for the Early Eocene</strong></p> <p><strong>Citation: </strong>Zhu, J., Poulsen, C. J., Otto-Bliesner, B. L., Liu, Z., Brady, E. C., & Noone, D. C. (2020). Simulation of early Eocene water isotopes using an Earth system model and its implication for past climate reconstruction. Earth and Planetary Science Letters, 537, 116164. <a href="https://doi.org/10.1016/j.epsl.2020.116164">https://doi.org/10.1016/j.epsl.2020.116164</a></p> <ul> <li>Data set includes climatology (12 months) sea-surface temperature (TEMP) and sea-surface oxygen isotope ratio (R18O) from four Eocene simulations with 1×, 3×, 6×, and 9× preindustrial level of CO2 (284.7 ppmv), and a preindustrial simulation.</li> <li>Climatology was calculated from averaging data over the last 100 years of each simulation.</li> <li>Seawater d18O = (R18O - 1.0) * 1000.0</li> <li>TEMP and R18O are on the POP ocean grid (~1°; see here: <a href="http://www.cesm.ucar.edu/models/cesm1.2/pop2/">http://www.cesm.ucar.edu/models/cesm1.2/pop2/</a>).</li> </ul>
Database of Past and Present Alien Invasive Species-Related Policy and Legislation in South Africa
<p>A full list of all laws relevant to biological invasions in South Africa since 1861</p>
FIG. 9 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 9. — Fossil and modern occurrences of the three dipsadid species identified on the Guadeloupe Islands at the different chronological intervals.
FIG. 5 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 5. — Trunk vertebrae of Alsophis antillensis (Schlegel, 1837) from Gare Maritime de Basse-Terre archaeological site (US 1008) located on Basse-Terre Island (A) and from Blanchard Cave paleontological deposit (Layer 11) located on Marie-Galante Island (B). Abbreviations: cd., condyle; ct., cotyle; di., diapophysis; e. s., epizygapophyseal spine; h. k., hemal keel; m. c., medial constriction; n. s., neural spine; p. c., precondylar constriction; p. d., paracotylar depression; p. n., postero-medial notch of the zygantrum; pa., parapophysis; pz. f., prezygapophyseal facet; pz. p., prezygapophyseal process; s. d., subcentral depression; s. r., subcentral ridge; s. t., sub-cotylar tubercle; zs., zygosphene. Scale bars: 4 mm.
FIG. 3 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 3. — Measurements taken of snake vertebrae: CL, greatest centrum length; GH, greatest height of the vertebra; LNS, greatest length of the neural spine; MLV, maximum length of vertebra; PRW, prezygapophyseal width; WIC, width of interzygapophyseal constriction (= NAW sensu Szyndlar 1984); Wa, greatest width of the anterior part of the neural arch; Wp, greatest width of the posterior part of the neural arch (= PO-PO sensu Szyndlar 1984).
FIG. 8 in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 8. — Distribution of size (centrum length) of snake vertebrae from archaeological deposits (A) and natural deposits (B) on the Guadeloupe Islands.
FIG. 1. — A in Fossil dipsadid snakes from the Guadeloupe Islands (French West-Indies) and their interactions with past human populations
FIG. 1. — A, Map of the Lesser Antilles indicating the position of the Guadeloupe archipelago; B, Map of the Guadeloupe Islands with isobaths (–200 m) from Münch et al. (2013) and locations of the studied sites: 1, cathédrale de Basse-Terre; 2, gare maritime de Basse-Terre; 3, Sainte-Rose la Ramée; 4,Trou Lolo; 5, Anse à l'Écu cave; 6, Bambous cave; 7, Morel; 8, Anse à la Gourde cave; 9, Anse à la Gourde; 10, Pointe du Helleux; 11, Anse Petite Rivière;12, Pointe Gros Rempart 6; 13, Caille à Bélasse; 14, Jean-François gully cave;15, Morne Rita;16, Tourlourous – Stade José Bade; 17, Blanchard cave; 18, Cadet 2 cave;19, Cadet 3 shelter;20, Grande-Anse de Terre de Bas.
Figure 3 from: Ripetska O, Mahlovanyy A, Hrynovets I, Chaban T, Hrynovets V, Buchkovska A, Harkov S, Deneha I, Pasko O, Renka M (2020) Clinical study of the efficacy of si-containing polishing paste for the professional hygiene procedures in patients with periodontal disease. Pharmacia 67(1): 17-22. https://doi.org/10.3897/pharmacia.67.e35152
Figure 3 Dynamics of recurrence of gum bleeding and periodontal inflammation in patients 16–29 years with periodontitis (I stage of heaviness). *On the horizontal axis – Repeated examination in periods of time: 1) -1 month; 2)-6 months; and 3) -12 months. *On the vertical axis: Quantity of periodontal areas with bleeding on probing (%).
Figure 1 from: Ripetska O, Mahlovanyy A, Hrynovets I, Chaban T, Hrynovets V, Buchkovska A, Harkov S, Deneha I, Pasko O, Renka M (2020) Clinical study of the efficacy of si-containing polishing paste for the professional hygiene procedures in patients with periodontal disease. Pharmacia 67(1): 17-22. https://doi.org/10.3897/pharmacia.67.e35152
Figure 1 Dynamics of gingival bleeding in patients 30–55 years old with periodontitis (I-stage of heaviness) in the main and control groups. *On the horizontal axis – Repeated r periods of time: 1) -1 month; 2)-6 months; and 3) -12 months. *On the vertical axis: Quantity of periodontal areas with bleeding on probing (%).
Figure 2 from: Ripetska O, Mahlovanyy A, Hrynovets I, Chaban T, Hrynovets V, Buchkovska A, Harkov S, Deneha I, Pasko O, Renka M (2020) Clinical study of the efficacy of si-containing polishing paste for the professional hygiene procedures in patients with periodontal disease. Pharmacia 67(1): 17-22. https://doi.org/10.3897/pharmacia.67.e35152
Figure 2 Dynamics of recurrence of subclinical calculus in patients 16–29 years with periodontitis (I stage of heaviness). *On the horizontalaxis – Repeated examinations in periods of time: 1) - 1 month; 2) - 6 months; and 3) - 12 months. *On the vertical axis: Quantity of periodontal areas with bleeding on probing (%).
Data from: Climate change and landscape-use patterns influence recent past distribution of giant pandas
<p>Climate change is one of the most pervasive threats to biodiversity globally, yet the influence of climate relative to other drivers of species depletion and range contraction remain difficult to disentangle. Here, we examine climatic and non-climatic correlates of giant panda (<i>Ailuropoda melanoleuca</i>) distribution using a large-scale 30-year dataset to evaluate whether a changing climate has already influenced panda distribution. We document several climatic patterns, including increasing temperatures, and alterations to seasonal temperature and precipitation. We found that while climatic factors were the most influential predictors of panda distribution, their importance diminished over time, while landscape variables have become relatively more influential. We conclude that the panda's distribution has been influenced by changing climate, but conservation intervention to manage habitat is working to increasingly offset these negative consequences.</p>
Data of the ER 2020 Publication: Past Trends and Future Prospects in Conceptual Modeling - A Bibliometric Analysis
<p>Related Publication:</p> <p>Härer, Felix, Fill, Hans-Georg (2020): Past Trends and Future Prospects in Conceptual Modeling - A Bibliometric Analysis. Accepted for: 39th International Conference on Conceptual Modeling, ER 2020.</p> <p>Contents:</p> <ul> <li>The directory <em>Descriptive Analysis</em> contains all publications of the analysis database used for the descriptive analysis.</li> <li>The directory <em>Bibliometric Analysis</em> contains the NLP and analysis processes for RapidMiner with stopwords and synonyms.</li> </ul>
Fig. 6 in First insights into past biodiversity of giraffes based on mitochondrial sequences from museum specimens
Fig. 6. Postcards of the Senegal giraffe at the beginning of the 20th century. A. "Une Girafe des Jardins de Shor", photo taken by P. Tacher in 1909 (https://oldthing.ch/AK-Saint-Louis-Une-Girafe-des-Jardinsde-Shor-Giraffe-im-Gehege-0033371252). B. "Girafe originaire du Sénégal" (https://www.ebay.fr/sch/ Cartes-postales/914/i.html?cmd=Blend%7CBlend&_nkw=girafe). C. "Mission du Sénégal – girafe à Dakar" (https://www.picclickimg.com/d/400/pict/192836173148_/CPA-DAKAR--SENEGAL-MISSION-DU-SENEGAL-UNE.jpg).
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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.