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534 results for “stable isotopes”
Radiometric dating of sediment cores from three alpine lakes in Utah, United States, with stable isotope data
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Exploring variability in the diet of depredating sperm whales in the Gulf of Alaska through stable isotope analysis
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Supporting data for tiger beetle stable isotope analysis
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Atlantic cod individual spatial behaviour and stable isotope associations in a no-take marine reserve
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Can diet composition estimates using stable isotope analysis of feathers predict growth and condition in nestling mountain bluebirds (Sialia currucoides)
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Insights into natal origins of migratory Nearctic hover flies (Diptera: Syrphidae): New evidence from stable isotope (δ2H) assignment analyses
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Diet composition based on stable isotopic analysis of fecal samples revealed the preference of Black-faced Spoonbill (Platalea minor) for natural wetlands and fishponds
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Carbon and nitrogen stable isotope values for lake trout from 6 different Arctic lakes near Toolik, Arctic LTER 1987 to 1988.
Lake trout were analysed for carbon and nitrogen stable isotope values in 6 Arctic lakes near Toolik Lake at the Arctic LTER in 1987 and 1988. The fish were also analysed for age using otoliths.
Nitrogen and oxygen stable isotopes of nitrate from CalCOFI lines 80 and 93 plus station 081.8 046.9. Collected on cruises from 2010 to 2016.
Stable isotopes of nitrate were measured on CalCOFI cruises from 2010-2016 from lines 80 and 93 plus station 081.8 046.9. Samples were filtered directly from the CTD and then frozen until analysis. Samples collected from 2010-2012 were analyzed in the Sigman Lab at Princeton University. Samples collected from 2013-2016 were analyzed in the Wankel Lab at Woods Hole Oceanographic Insititution. Five samples from station 081.8 046.9 (the Santa Barbara Basin) were further analyzed for nitrogen isotopes of nitrite in the Wankel Lab.
McMurdo Dry Valleys Gas, Tritium, Stable Isotope, and Major Ion data for lake waters: 2005-2006 Antarctic Season
Data of dissolved gas, tritium, stable isotopes, and major ion for Lake Vanda (Wright Valley), Lake Fryxell (Taylor Valley), Lake Hoare (Taylor Valley), and Lake Joyce (Pearce Valley): 2005-2006 Antarctic Season
McMurdo Dry Valleys Stable Isotope Data for Lake Chad
This micro data set contains stable isoptope data for water samples taken from Lake Chad. Although it is not part of the core monitoring program, it is potentially important.
Stable isotopes of M. mercenaria and plant sources on the Virginia Coast
d13C, d15N, d2H stable isotope values of clams, macrophytes, macroalgae, microalgae from Cobb Island Bay vicinity
South Bay, VA, seagrass sediment and autotroph source stable isotope compositions, 2014
Abstract text from Oreska et al. (2017): Non-seagrass sources account for 50% of the sediment organic carbon (SOC) in many seagrass beds, a fraction that may derive from external organic matter (OM) advected into the meadow and trapped by the seagrass canopy or produced in situ. If allochthonous carbon fluxes are responsible for the non-seagrass SOC in a given seagrass bed, this fraction should decrease with distance from the meadow perimeter. Identifying the spatial origin of SOC is important for closing seagrass carbon budgets and "blue carbon" offset-credit accounting, but studies have yet to quantify and map seagrass SOC stocks by carbon source. We measured sediment d13C, d15N, and d34S throughout a large (6 km2), restored Zostera marina (eelgrass) meadow and applied Bayesian mixing models to quantify total SOC contributions from possible autotroph sources, Z. marina, Spartina alterniflora, and benthic microalgae (BMA). Z. marina accounted for <40% of total meadow SOC, but we did not find evidence for outwelling from the fringing S. alterniflora salt-marsh or OM advection from bare subtidal areas. S. alterniflora SOC contributions averaged 10% at sites both inside and outside of the meadow. The BMA fraction accounted for 51% of total meadow SOC and was highest at sites furthest from the bare subtidal-meadow edge, indicative of in situ production.
Raw stable water isotope measurements in water vapour at 13.5 m a.s.l., made in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition (ACE).
<p><strong>Dataset abstract</strong></p> <p>This dataset includes the raw data of stable water vapour isotope (δ18O, δ2H, deuterium excess) and water vapour mixing ratio measurements taken in the Southern Ocean during the Antarctic Circumnavigation Expedition (ACE) from November 2016 to April 2017 using a Picarro laser spectrometer L2130. This data has to be calibrated using the calibration runs and applying an appropriate calibration procedure following the IAEA guide lines.</p> <p>Two similar datasets also measuring stable water isotopes (SWIs) in water vapour were collected during the same expedition and can be distinguished from this dataset due to the height of the measurement collection (8 m a.s.l rather than 13.5 m a.s.l). The three ACE datasets of SWIs in water vapour are described and compared in Thurnherr et al. (2020).</p> <p>The calibrated dataset can be found with DOI: 10.5281/zenodo.3250790.</p> <p><strong>Dataset contents</strong></p> <ul> <li>year/month/day/HIDS2054-${year}${month}${day}-${time:Hhmmss}Z-DataLog_User.dat, data file, comma-separated values</li> <li>data_file_header.txt, metadata, text format</li> <li>README.txt, metadata, text format</li> </ul> <p><strong>Change log</strong></p> <p><strong>v1.1</strong> - Added 13.5 m a.s.l to title of dataset to distinguish it from other similar datasets collected during the expedition. Added calibrated dataset DOI and information about other SWI datasets from ACE, to abstract. Added reference to Thurnherr et al. (2020) to README.txt. Updated citation of dataset in README.txt.</p> <p><strong>v1.0</strong> - Initial release of raw stable water isotope measurements in water vapour dataset.</p> <p><strong>Dataset license</strong></p> <p>This stable water isotope measurements in water vapour dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/</p>
Raw stable water isotope measurements in water vapour at 8 m a.s.l. on the starboard side of the ship, made in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition (ACE).
<p><strong>Dataset abstract</strong></p> <p>This dataset includes the raw data of stable water vapour isotope (δ18O, δ2H, deuterium excess) and water vapour mixing ratio measurements at a height of approximately 8 meters above sea level taken in the Southern Ocean during the Antarctic Circumnavigation Expedition (ACE) from November 2016 to April 2017 using a Picarro laser spectrometer L2130-i mounted on the starboard side of the ship. L2130-i was operated only during two months in February and March 2017 from Hobart (Australia) to Cape Town (South Africa). This data has to be calibrated using the calibration runs and applying an appropriate calibration procedure following the IAEA guide lines.</p> <p>Two similar datasets also measuring stable water isotopes (SWIs) in water vapour were collected during the same expedition and can be distinguished from this dataset due to the height of the measurement collection (at 8 m a.s.l and 13.5 m a.s.l). The three ACE datasets of SWIs in water vapour are described and compared in Thurnherr et al. (2020).</p> <p><strong>Dataset contents</strong></p> <ul> <li>leg*/HIDS2018-yyyymmdd-hhmmssZ-DataLog_User.dat, data file, comma-separated values</li> <li>data_file_header.txt, metadata, text format</li> <li>README.txt, metadata, text format</li> </ul> <p><strong>Dataset license</strong></p> <p>This raw stable water isotope measurements dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full description can be found at https://creativecommons.org/licenses/by/4.0</p>
Dataset for the manuscript "Barium stable isotopes as a fingerprint of biological cycling in the Amazon River Basin" submitted to Biogeosciences Discussions
<p>This file contains the dataset of the manuscript submitted to Biogeosciences Discussions entitled "Barium stable isotopes as a fingerprint of biological cycling in the Amazon River Basin" by Charbonnier et al. It consists in three spreadsheets: (1) dissolved species concentration and dissolved Ba isotope data on river dissolved load; (2) main characteristics and Ba isotope data of river sediments; (3) compilation of major element and Ba and Li concentration in rocks (compilation made from the GEOROC database) and in the dissolved load of river draining single rock types (compilation made from previously published data and new data).</p>
wangbin-zhang/CN-Nanjing: Nanjing_stable isotopes
<p>Stable isotopes in atmospheric water vapor and precipitation in Nanjing</p>
Calibrated data of stable water isotope measurements in water vapour at 8 m a.s.l. on the port side of the ship, made in the austral summer of 2016/2017 around the Southern Ocean during the Antarctic Circumnavigation Expedition.
<p><strong>Dataset abstract</strong></p> <p>This data set includes the calibrated data of stable water vapour isotope (δ18O, δ2H, deuterium excess) and water vapour mixing ratio measurements at approximately 8 m a.s.l. on the port of the ship, taken around the Southern Ocean during the Antarctic Circumnavigation Expedition (ACE) from November 2016 to April 2017 using a Picarro laser spectrometers L2120. The data provide continuous timelines of atmospheric water vapour properties in the marine boundary layer for studies of the atmospheric water cycle.</p> <p>The raw data from which this calibrated dataset originates has been published separately (Kozachek, 2020; DOI 10.5281/zenodo.3667535).</p> <p>Two other calibrated stable water isotope measurement datasets were also collected during ACE. They differ by the location of measurement on the ship: 8 m a.s.l on the starboard side (DOI: 10.5281/zenodo.3739335) and 13.5 m a.s.l (DOI: 10.5281/zenodo.3250790).</p> <p><strong>Dataset contents</strong></p> <p>Measurements on portside:</p> <ul> <li>ACE_watervapour_isotopes_SWI8-ps_1h.csv, data file, comma-separated values</li> <li>ACE_watervapour_isotopes_SWI8-ps_5min.csv, data file, comma-separated values</li> <li>cal_runs_SWI8-ps.csv, metadata, comma-separated values</li> <li>cal_flag_times_SWI8-ps.csv, metadata, comma-separated values</li> <li>data_file_header.txt, metadata, text format</li> <li>README.txt, metadata, text format</li> </ul> <p>NaN values denote missing values which occur because of e.g., maintenance, instrument calibration, large cavity variations.</p> <p><strong>Dataset license</strong></p> <p>This calibrated stable water isotope measurements in water vapour is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/</p>
Miocene paleotopography and paleoclimate based on paired stable isotope compositions in Namling Basin, south Tibet
<p>This supporting information contains four datasets asTable 1 in the main text and Table S1, Table S2, and Table S3 in the supplementary file. Table S1 is the zircon U-Pb dating of two tuff samples. Both samples were collected in 2016 at the bottom and at the top of the measured section to constrain the precisely formed timing of the samples. U-Pb dating was processed by laser ablation inductively coupled plasma-mass spectrometer (LA-ICP-MS) and calculated by the GLITTER_V4.0.</p> <p>Table S2 is a summary Miocene δ<sup>2</sup>H data, δ<sup>18</sup>O data, and vegetation associations in the Miocene Tibetan Plateau basins from literature. These data were from our study in Namling Basin and previous work (Spicer et al., 2003; Currie et al., 2016; Khan et al., 2014); Lunpola Basin (Polissar et al., 2009; Sun et al., 2014), Hoh Xil Basin (Polissar et al., 2009; Sun et al., 2015; Li et al., 2015), and Qaidam basin (Zhuang et al., 2014; Miao et al., 2013) as well as the biotite δ2H data from Himalaya (Gebélin et al., 2013). Paleometeoric water δD<sub>w</sub> values are calculated by applying the average established and local apparent fractionation factor of -111±14‰ in the Namling, Lunpola and Hoh Xil basins and -102‰ in the Qaidam Basin (Zhuang et al., 2014). b. Paleometoric water δ<sup>18</sup>O<sub>w</sub> values are calculated by the calcite-water equation (Kim and O'Neil, 1997) with carbonate forming temperatures of 14.6±3.6°C in the Namling Basin, Lunpola Basin and Hoh Xil Basin (Deng et al., 2012; Sun et al., 2015; Ingalls et al., 2017).</p> <p>Table S3 is a summary of the stable isotope of the surface water across the Tibetan Plateau. These data were from the previous literature (Quade et al., 2011; Hren et al., 2009; Bershaw et al., 2012).</p>
Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids
The long-distance migrations by marine fishes are difficult to track by field observation. Here, we propose a new method to track such migrations using stable nitrogen isotopic composition at the base of the food web (<i>δ</i><sup>15</sup>N<sub>Base</sub>), which allows for direct comparison of isotope ratios between proxy organisms of the isoscape and the target migratory animal. We initially constructed a <i>δ</i><sup>15</sup>N<sub>Base</sub> isoscape in the North Pacific by bulk and compound-specific isotope analyses of copepods (<i>n</i> = 360 and 24, respectively). We then determined retrospective <i>δ</i><sup>15</sup>N<sub>Base</sub> values of spawning chum salmon (<i>Oncorhynchus keta</i>) from their vertebral centra (10 sections from each of two salmon), and estimated their migration routes by using a state-space model. Our isotope tracking method successfully reproduced a known chum salmon migration route between the Okhotsk and Bering seas, and our findings suggest the presence of a migration route to the Bering Sea Shelf during a later growth stage.
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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)
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DANDI Archive for NWB datasets
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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.