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138 results for “Elevation change”
Data from: Transgenerational and within-generation plasticity in response to climate change: insights from a manipulative field experiment across an elevational gradient
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Protecting alpine biodiversity in the Middle East from climate change: Implications for high-elevation birds
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Elevational niche-shift migration: Why the degree of elevational change matters for the ecology, evolution, and physiology of migratory birds
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Data from: DNA metabarcoding reveals changes in the contents of carnivorous plants along an elevation gradient
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GNSS uplift time series and ice surface elevation changes
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Future fire-driven landscape changes along a southwestern US elevation gradient
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Changes in microbial community structure and functioning with elevation are linked to local soil characteristics as well as climatic variables
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Elevation change time series, Kjer and Hayes glacier drainage basins, NW Greenland
<p>This data set includes ice sheet elevation time series reconstructed at 19 locations in the Kjer and Hayes glacier drainage basins. Time series were derived from Digital Elevation Models (DEMs) and altimetry data collected from 1993 to 2015 by using the SERAC approach (Schenk and Csatho, 2012).</p> <p>Reference: Schenk, T. & Csatho, B. A New Methodology for Detecting Ice Sheet Surface Elevation Changes From Laser Altimetry Data. <em>Geoscience and Remote Sensing, IEEE Transactions on</em> <strong>50,</strong> 3302–3316 (2012).</p>
Surface elevation change for Khumbu Glacier, 1984–2015
<p>Digital Elevation Model (DEMs) of Difference showing the change in surface elevation of Khumbu Glacier, Nepal, between 1984–2015 and 2000–2015 derived through the differencing of high-resolution DEMs generated from 0.5 m ground resolution aerial photographs (1984 CE) and WorldView-1 and WorldView-2 imagery with a spatial resolution of 0.46 m (2015 CE).</p>
Data from: Artificial selection on allometry: change in elevation but not slope
To what extent within-species (static) allometries constitute a constraint on evolution is the subject of a long-standing debate in evolutionary biology. A prerequisite for the constraint hypothesis is that static allometries are hard to change. Several studies have attempted to test this hypothesis with artificial-selection experiments, but their results remain inconclusive due to various methodological issues. Here, we present results from an experiment in which we selected independently on the slope and the elevation of the allometric relation between caudal-fin size and body size in male guppies (Poecilia reticulata). After three episodes of selection, the allometric elevation (i.e. intercept at constant slope) had diverged markedly between the lines selected to increase or decrease it, and showed a realized heritability of 50%. In contrast, the allometric slope remained unaffected by selection. These results suggest that the allometric elevation is more evolvable than the allometric slope, this latter representing a potential constraint on adaptive trait evolution. To our knowledge, this study is the first artificial-selection experiment that directly tests the evolvability of static allometric slopes.
MSc. Thesis: Climate change and ectotherms - How rising temperatures might elevate rates of evolution
<p>R scripts & additional data created for a master's thesis at Johann Wolfgang Goethe-Universität Frankfurt am Main in collaboration with Senckenberg Biodiversity- and Climate Research Centre (SBiK-F)</p> <p> </p>
Map of the rate of elevation change of Mont-Blanc glaciers derived from Pléiades stereo-images
<p>This collection contains three map of elevation changes derived form Pléiades images acquired in 2012, 2021 and 2022 over the Mont-Blanc Massif (Alps) with a horizontal grid spacing of 4 m. They were derived from stereo-pairs acquired 19 August 2012, 15 August 2021, 12 October 2022, 8 August 2022 and 5 October 2022. No data are indicated by the -9999 value.</p> <p>We generated 4-m DEMs from five Pléiades stereo-pairs using the semi-global matching algorithm of the Ames Stereo Pipeline (Beyer et al., 2018) and the set of parameters defined in Deschamps-Berger et al. (2020). The DEMs were first coregistered on stable terrain, masking out glacierized areas using a glacier inventory from year 2015 (Paul et al., 2020). Spatially-coherent biases in the elevation difference maps were next corrected using a polynomial fit across-track and a spline fit in the along-track direction (Falaschi et al., 2023). </p> <p>Pléiades stereo-images were obtained thanks to DINAMIS Project, for “Dispositif Institutionnel National d’Approvisionnement Mutualisé en Imagerie Satellitaire”, a French platform that acquires and distributes very high resolution Earth satellite imagery for French and foreign institutional users under specific subscription conditions.</p>
Data from: Artificial selection on allometry: change in elevation but not slope
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Digital Elevation Models for the Global Change Research Wetland, Maryland, USA, 2016
This dataset contains four alternative digital elevation models (DEMs) at 1 m resolution and model performance statistical metrics for the Global Change Research Wetland (GCReW) site on the Rhode River, a tributary of the Chesapeake Bay in Maryland, USA, for the year 2016. Three DEMs were created by using different strategies for correcting positive biases in Light Detection and Ranging (LiDAR)-based DEMs that are common in tidal wetlands. These included (1) applying a single average offset based on a literature review, (2) using the LiDAR Elevation Correction with NDVI (LEAN)-method, and (3) applying plant community-specific offsets using a local vegetation cover map. Existing LiDAR data at 1 m resolution collected in 2011 was the basis for these DEMs. The fourth DEM was created by using Empirical Bayesian Kriging to extrapolate between measured ground points. The elevation is provided in meters relative to the North American Vertical Datum of 1988 (NAVD 88). To calibrate the four approaches, the elevation of the entire marsh complex was surveyed at 20 m x 20 m resolution to document the distribution of elevation relative to tidal datums from a single year. Two Trimble R8 real-time kinematic (RTK) GPS receivers were used to survey 525 points over the complex from July 26, 2016, to August 15, 2016. Relative plant cover was also documented. Tidal datums were calculated from the nearby Annapolis, MD tidal gauge located 13 km from GCReW.
Elevation Change of the Southern Greenland Ice Sheet from 1978-88, Version 1
Southern Greenland ice sheet elevation change estimates are derived from SEASAT and GEOSAT radar altimetry data from 1978 to 1988. Data are confined to 61-72 deg N, 30-50 deg W, above 1700 m elevation. The addition of GEOSAT Geodetic Mission (GM) data results in twice as many crossover points and 50% greater coverage than previous studies. Coverage above 2000 m elevation is improved to 90%, and about 75% of the area between 1700 m and 2000 m is now covered. Data are in ASCII text format, available via FTP, and consist of elevation change rate (dH/dt, cm/year) and corresponding error estimates in 50 km grid cells.
Age-associated changes in murine endothelial gene expression and chromatin accessibility correlate with impaired blood-brain barrier integrity and elevated risk of intracerebral hemorrhage [RRBS]
GEO Series GSE218648. Mus musculus. 29 samples. Type: Methylation profiling by high throughput sequencing.
Global transcriptomic changes following carbon limitation and elevated carbon dioxide in Nannochloropsis oceanica IMET1: Illumina sequencing
GEO Series GSE55861. Nannochloropsis oceanica. 18 samples. Type: Expression profiling by high throughput sequencing.
Exposure of bovine oocytes to elevated insulin concentration (0.1 ug/ml) during in vitro maturation changes DNA methylation pattern in Day-8-blastocysts – an epigenetic study.
GEO Series GSE97516. Bos taurus. 4 samples. Type: Methylation profiling by genome tiling array.
Age-associated changes in murine endothelial gene expression and chromatin accessibility correlate with impaired blood-brain barrier integrity and elevated risk of intracerebral hemorrhage
GEO Series GSE218649. Mus musculus. 79 samples. Type: Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing; Methylation profiling by high throughput sequencing.
Age-associated changes in murine endothelial gene expression and chromatin accessibility correlate with impaired blood-brain barrier integrity and elevated risk of intracerebral hemorrhage [ATAC-seq]
GEO Series GSE218647. Mus musculus. 20 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
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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.