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116 results for “temperature experiment”
Data on short-term temperature modulated dilution experiments and summary of dilution experiments in (sub)tropical waters
<p>Two datasets were compiled for estimating and comparted the temperature sensitivity of phytoplankton growth rate within vs across communities.</p> <p>One dataset contains the data of short-term temperature modulated dilution experiments conducted at three subtropical coastal sites for one year. In each experiment, the phytoplankton community growth rates were estimated at five different temperatures via the dilution approach. </p> <p>Another dataset contains the phytoplankton community growth rates in (sub)tropical waters estimated by the dilution approach, collected from related literature. </p> <p> </p>
High temperature frequently increases facilitation between aquatic foundation species: A global meta-analysis of interaction experiments between angiosperms, seaweeds, and bivalves
<ol> <li><span>Many studies have quantified ecological impacts of individual foundation species (FS). However, emerging data suggest that FS often co-occur, potentially inhibiting or facilitating one another, thereby causing indirect, cascading effects on surrounding communities. Furthermore, global warming is accelerating, but little is known about how interactions between co-occurring FS vary with temperature. </span></li> <li><span>Shallow aquatic sedimentary systems are often dominated by three types of FS: slower-growing clonal angiosperms, faster-growing solitary seaweeds, and shell-forming filter- and deposit-feeding bivalves. Here, we tested the impacts of one FS on another by analyzing manipulative interaction experiments from 148 papers with a global meta-analysis.</span></li> <li> <span>We calculated </span><span>1,942 (non-independent) Hedges' <em>g</em> effect sizes,</span> <span>from 11,652 extracted values over performance responses, such as abundances, growths or survival of FS, and their associated standard deviations and replication levels. Standard aggregation procedures generated 511 independent Hedges' <em>g</em> that was classified into six types of reciprocal impacts between FS. </span> </li> <li><span>We found that (i) seaweeds had consistent negative impacts on angiosperms across performance responses, organismal sizes, experimental approaches, and ecosystem types; (ii) angiosperms and bivalves generally had positive impacts on each other (e.g., positive effects of angiosperms on bivalves were consistent across organismal sizes and experimental approaches, but angiosperm effects on bivalve growth and bivalve effect on angiosperm abundance were not significant); (iii) bivalves positively affected seaweeds (particularly on growth responses); (iv) there were generally no net effects of seaweeds on bivalves (except for positive effect on growth) or angiosperms on seaweeds (except for positive effect on 'other processes'); and (v) bivalve interactions with other FS were typically more positive at higher temperatures, but angiosperm-seaweed interactions were not moderated by temperature.</span></li> <li> <em><span>Synthesis</span></em><span>: Despite variations in experimental and spatiotemporal conditions, the stronger positive interactions at higher temperatures suggest that facilitation, particularly involving bivalves, may become more important in a future warmer world. Importantly, addressing research gaps, such as the scarcity of FS interaction experiments from tropical and freshwater systems and for less studied species, as well as testing for density-dependent effects, could better inform aquatic ecosystem conservation and restoration efforts and broaden our knowledge of FS interactions in the Anthropocene.</span> </li> </ol>
Roy et al. 2023 Supplemental Information for "Sediment-encased pressure–temperature maturation experiments elucidate the impact of diagenesis on melanin-based fossil color and its paleobiological implications."
<p><em>Supplemental Information for</em></p> <p>Sediment-encased pressure–temperature maturation experiments elucidate the impact of diagenesis on melanin-based fossil color and its paleobiological implications.</p> <p>Arindam Roy<em><sup>*</sup></em> (<a href="https://orcid.org/0000-0002-4890-6851">https://orcid.org/0000-0002-4890-6851</a>)</p> <p>Michael Pittman<em><sup>*</sup></em> (<a href="https://orcid.org/0000-0002-6149-3078">https://orcid.org/0000-0002-6149-3078</a>)</p> <p>Thomas G. Kaye (<a href="https://orcid.org/0000-0001-7996-618X">https://orcid.org/0000-0001-7996-618X</a>)</p> <p>Evan T. Saitta (<a href="https://orcid.org/0000-0002-9306-9060">https://orcid.org/0000-0002-9306-9060</a>)</p> <p>*Corresponding author(s)</p> <p><strong>Email: </strong><a href="mailto:ar15313@bristol.ac.uk">ar15313@bristol.ac.uk</a> ; <a href="http://palaeopittman.com/2022/03/27/lab-members/mpittman@cuhk.edu.hk">mpittman@cuhk.edu.hk</a></p> <p>The Dataset contains two files, (1) Supporting Information and (2) Supporting Data PCA worksheet. </p> <p>The first contains Supplementary tables and figures (.docx file) while the structural organisation of the second (.xlsx file) is provided below:</p> <p>We received ToF-SIMS data (Samples 1–30, 36–51) pertaining to purified melanosome extracts of modern bird feathers (both fresh and capsule-matured) from Caitlin Colleary (Associate Curator of Vertebrate Paleontology, Cleveland Museum of Natural History), based on their previous work (Colleary et al. 2015). Citation below:</p> <p> </p> <p>Colleary, C., A. Dolocan, J. Gardner, S. Singh, M. Wuttke, R. Rabenstein, J. Habersetzer, S. Schaal, M. Feseha, M. Clemens, B. F. Jacobs, E. D. Currano, L. L. Jacobs, R. L. Sylvestersen, S. E. Gabbott, and J. Vinther. 2015. Chemical, experimental, and morphological evidence for diagenetically altered melanin in exceptionally preserved fossils. Proceedings of the National Academy of Sciences USA 112(41):12592-7. doi: https://doi.org/10.1073/pnas.1509831112</p> <p> </p> <p>We further augmented this data set by adding ToF-SIMS spectra from our own samples (31-34, 52-79) pertaining to sediment encased maturation experiments (190ºC to 300ºC) and fossilised feathers of paravian dinosaurs housed at the Shandong Tianyu Museum of Natural History, Linyi Shi, Shandong, China.</p> <p>We conducted Principal Components Analysis with this Data and this dataset effectively serves as a PCA worksheet. The file can be opened/edited using Microsoft 365 Excel (.xlsx) with the following organisation of sheets.</p> <p>Sheets:</p> <p><strong>|----- PCA All</strong> : contains Sample ID, treatment categories, mass by charge (m/z) ratios of 55 peaks, peak identity and raw intensity counts</p> <p><strong>|-----PCA All Normalised</strong> : same data as PCA All but peak raw intensity counts normalised.</p> <p><strong>|-----PCA All Mean Centered</strong>: same data as PCA Normalised but with peak raw intensity mean centered.</p> <p><strong>|-----PCA All Loading Matrix:</strong> Loading matrix for PCA All using all 55 peaks.</p> <p><strong>|-----PCA All Eigen Vectors: </strong>Eigen vectors for PCA All.</p> <p><strong>|-----PCA All Scores: </strong> PCA scores for all 55 peaks.</p> <p><strong>|-----PCA No Lipids RAW</strong>: same data as PCA All but without peaks suspected to arise from lipids (e.g., CxH-).</p> <p><strong>|-----PCA No Lipids Normalised:</strong> same data as PCA without Lipids RAW but with peak raw intensity counts normalised.</p> <p><strong>|-----PCA No Lipids MeanCentred:</strong> same data as PCA without Lipids Norm but with peak raw intensity counts mean centered.</p> <p><strong>|-----PCA No Lipids Loading Matrix:</strong> Loading matrix for PCA All excluding peaks of lipid origin (CxH-).</p> <p><strong>|-----PCA No Lipids Eigen Vectors: </strong>Eigen vectors for PCA No Lipids Eigen Vectors.</p> <p><strong>|-----PCA No Lipids Scores:</strong> PCA scores for all peaks excluding those of lipid origin (CxH-).</p> <p> </p> <p>The dataset has been created in Microsoft Office 365 (Excel: .xlsx file). The file can also be also be opened and edited using the following softwares.</p> <p>1. Google Sheets</p> <p>2. Apache Open Office</p> <p>3. Libre Office</p> <p>4. PAST 4 (free software for scientific data analysis, with functions for data manipulation, plotting, univariate and multivariate statistics, ecological analysis, time series and spatial analysis, morphometrics and stratigraphy)."</p>
Effect of urban heat island mitigation strategies on precipitation and temperature in Montreal, Canada: case studies - Data from numerical experiments
<p>Surface data from the numerical experiments for the paper : "Effect of urban heat island mitigation strategies on precipitation and temperature in Montreal, Canada: case studies", submitted in PLOS Climate. </p> <p>The data is in NetCDF, structure as follow: 1 file per initialization date that contains the model outputs for the surface variables (air temperature, dew-point, relative humidity) and 1 file per initialization date that contains the accumulated precipitation. </p>
Shear experiment datas for laumontite and mixed gouges at different temperatures and pore pressures
<p><span>Laumontite is a common and potentially frictionally-unstable hydrothermal alteration product present in deep faults of the Gonghe EGS reservoir. We characterize the friction-stability characteristics of synthetic laumontite gouge under <em>in situ</em> reservoir conditions. The gouge is frictionally strong (μ=0.73</span><span>–</span><span>0.98) with quartz/laumontite mixtures (1:1) generally less strong (μ=</span><span>0.73</span><span>–</span><span>0.78</span><span>) with both largely independent of temperature but increasing with elevated pore pressure. The pure gouge and mixture are strongly velocity-weakening over a broad range in temperatures (~90</span><span>–</span><span>220℃) and excess pore pressures (0</span><span>–</span><span>90MPa) relevant to the Gonghe stimulation. Microearthquakes (MEQs) observed during stimulation are confined to within the broad depth range of inferred frictional instability – although fluid overpressures are also limited to this region. The observation that laumontite mixtures are frictionally unstable over a broad range of pressures and especially temperatures representative of EGS reservoirs and insensitive to the proportion of the coexisting mineral phase suggests its presence is a strong indicator of potential seismic hazard – and thus worthy of careful consideration. </span></p>
Electrical conductivity versus temperature in freezing conditions: a field experiment using a basket geothermal heat exchanger
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Shear experiment datas for laumontite and mixed gouges at different temperatures and pore pressures
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Ultrasonic wave from high pressure and temperature experiments
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Data from: A Drosophila laboratory evolution experiment points to low evolutionary potential under increased temperatures likely to be experienced in the future
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High temperature frequently increases facilitation between aquatic foundation species: A global meta-analysis of interaction experiments between angiosperms, seaweeds, and bivalves
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Structural variation of pseudotachylytes at different temperatures: evidence from high temperature heating experiments
<p>Data used in the manuscript [Structural variation of pseudotachylytes at different temperatures: evidence from high temperature heating experiments] by Zhang et al.</p>
Methane emission and sulfide levels increase in tropical seagrass sediments during temperature stress: a mesocosm experiment
<p>Climate change-induced ocean warming is expected to greatly affect carbon dynamics and sequestration in vegetated shallow waters, especially in the upper subtidal where water temperatures may fluctuate considerably and can reach high levels at low tides. This might alter the greenhouse gas balance and significantly reduce the carbon sink potential of tropical seagrass meadows. In order to assess such consequences, we simulated temperature stress during low tide exposures by subjecting seagrass plants (<i>Thalassia hemprichii</i>) and associated sediments to elevated midday temperature spikes (31, 35, 37, 40 and 45ºC) for seven consecutive days in an outdoor mesocosm setup. During the experiment, methane release from the sediment surface was estimated using gas chromatography. Sulfide concentration in the sediment pore water was determined spectrophotometrically, and the plant's photosynthetic capacity as Electron Transport Rate (ETR) and maximum quantum yield (Fv/Fm) was assessed using pulse-amplitude modulated (PAM) fluorometry. The highest temperature treatments (40 and 45ºC) had a clear positive effect on methane emission and the level of sulfide in the sediment and, at the same time, clear negative effects on the photosynthetic performance of seagrass plants. The effects observed by temperature stress were immediate (within hours) and seen in all response variables, including ETR, Fv/Fm, methane emission and sulfide levels. In addition, both the methane emission and the size of the sulfide pool were already negatively correlated to changes in the photosynthetic rate (ETR) during the first day, and with time, the correlations became stronger. These findings show that increased temperature will reduce primary productivity and increase methane and sulfide levels. Future increases in the frequency and severity of extreme temperature events could hence reduce the climate mitigation capacity of tropical seagrass meadows by reducing CO<sub>2</sub> sequestration, increase damage from sulfide toxicity, and induce the release of larger amounts of methane.</p>
Data from: Impact of temperature and nutrients on carbon: nutrient tissue stoichiometry of submerged aquatic plants: an experiment and meta-analysis
Human activity is currently changing our environment rapidly, with predicted temperature increases of 1–5°C over the coming century and increased nitrogen and phosphorus inputs in aquatic ecosystems. In the shallow parts of these ecosystems, submerged aquatic plants enhance water clarity by resource competition with phytoplankton, provide habitat, and serve as a food source for other organisms. The carbon:nutrient stoichiometry of submerged aquatic plants can be affected by changes in both temperature and nutrient availability. We hypothesized that elevated temperature leads to higher carbon:nutrient ratios through enhanced nutrient-use efficiency, while nutrient addition leads to lower carbon:nutrient ratios by the luxurious uptake of nutrients. We addressed these hypotheses with an experimental and a meta-analytical approach. We performed a full-factorial microcosm experiment with the freshwater plant Elodea nuttallii grown at 10, 15, 20, and 25°C on sediment consisting of pond soil/sand mixtures with 100, 50, 25, and 12.5% pond soil. To address the effect of climatic warming and nutrient addition on the carbon:nutrient stoichiometry of submerged freshwater and marine plants we performed a meta-analysis on experimental studies that elevated temperature and/or added nutrients (nitrogen and phosphorus). In the microcosm experiment, C:N ratios of Elodea nuttallii decreased with increasing temperature, and this effect was most pronounced at intermediate nutrient availability. Furthermore, higher nutrient availability led to decreased aboveground C:P ratios. In the meta-analysis, nutrient addition led to a 25, 22, and 16% reduction in aboveground C:N and C:P ratios and belowground C:N ratios, accompanied with increased N content. No consistent effect of elevated temperature on plant stoichiometry could be observed, as very few studies were found on this topic and contrasting results were reported. We conclude that while nutrient addition consistently leads to decreased carbon:nutrient ratios, elevated temperature does not change submerged aquatic plant carbon:nutrient stoichiometry in a consistent manner. This effect is rather dependent on nutrient availability and may be species-specific. As changes in the carbon:nutrient stoichiometry of submerged aquatic plants can impact the transfer of energy to higher trophic levels, these results suggest that eutrophication may enhance plant consumption and decomposition, which could in turn have consequences for carbon sequestration.
Mechanical data of rotary shear experiments, temperature measurements, and temperature numerical models for the manuscript: "Mechanical energy dissipation during seismic dynamic weakening in calcite-bearing faults"
<p>All data included in this data repository is ancillary to the manuscript "Energy dissipation during dynamic weakening in calcite-bearing fault rocks", submitted to Journal of Geophysical Research: Solid Earth. </p><p>The data consists in time series of high velocity friction experiments run with SHIVA (INGV, Rome), time series acquired from a two-color pyrometer (UC3M), the synchronization of the two, and numerical models. The data format is .mat, proprietary to Matlab, but they can be easily accessed with Python (see <a href="https://docs.scipy.org/doc/scipy/reference/generated/scipy.io.loadmat.html">link</a>). Each .mat contains vector of the measured variables when opened from Matlab, or dictionaries when opened using the scipy.loadmat() function. </p><p>SHIVA and PYRO red data (calibrated data), fin data (synchronized data), and shivaRED vect data (numerical model data) are included in this data repository in separate folders. Numerical models are grouped in subfolder by type of model (the relation fin data to model is 1:n). We included the scripts to convert SHIVA raw data into SHIVA red data (<a href="https://github.com/aretu/shivaUNIX">link to shivaUNIX</a>), SHIVA and PYRO red data into fin data (/scripts/syncing2021.m), to obtain numerical models from fin data (<a href="https://github.com/aretu/shivaRED">link to shivaRED</a>), and to plot data (/scripts/making plots.ipynb).</p>
Experiments on the snowfall, temperature, and humidity to the Arctic summer snowstorm using ocean-ice couple model (POP2-CICE5) with JRA55-do and MERRA2 forcing
<p><span>In the Arctic, short-lived summer snowstorms can provide snow cover that can increase surface reflectivity and heat capacity. Despite their potential importance, little research has been done to understand the impact of summer snowstorms on basin-scale Arctic sea ice cover. Our observational analysis shows that a summer snowstorm event is accompanied by cyclonic ice drift, increases in surface albedo and surface air cooling that can persist for up to ~2 weeks, dampening sea ice loss. Specifically, multiple snowstorm events in a summer, on average, results in net increase in sea ice extent of ~0.2×106 km<sup>2</sup> by early September. Experiments with a sophisticated ice-ocean model framework indicate that the initial expansion of sea ice extent is driven by cyclonic wind-driven ice drifts driving sea ice southwards and increasing albedo around the summer ice edge, however the thermal effects from the associated snowfall and atmospheric conditions result in a stronger overall impact on basin-averaged sea ice extent at seasonal scales.</span></p> <p><span>Additional model experiments were carried out to isolate the physical processes contributing to the thermal response of Arctic sea ice to summer snowstorms. Our results show the impact of surface air cooling on sea ice extent is about 3.5 times larger than the snowfall/albedo response. However, our simulated albedo response is weaker than the observed response, likely due to the negligible difference in surface albedo between old snow and freshly fallen snow – a limiting factor in our analysis and a topic worthy of future focus.</span></p>
Dataset for publication: Supporting the assignment of NMR spectra with variable-temperature experiments
<p>1. The raw one- and two-dimensional NMR data for Products (1-7) listed in the article (Agilent 700 MHz).</p> <p>2. The raw 1D variable-temperature NMR data for Products 1-7 (Agilent 700 MHz).</p> <p>3. The 1D variable-temperature NMR data converted into a Bruker format to open in the Radon peak-picker, Radon peak-picker Python script (picker.py), and trained neural network model (model) folder. To open the Radon peak-picker see the Manual from: <a href="https://doi.org/10.1016/j.jmro.2022.100083">https://doi.org/10.1016/j.jmro.2022.100083</a></p> <p> </p>
Reducing the Experience of Menopausal Symptoms Through Temperature
ClinicalTrials.gov study NCT03937466. IPD Sharing: NO. Countries: 1. Publications: 0.
Experiments on the snowfall, temperature, and humidity to the Arctic summer snowstorm using ocean-ice couple model (POP2-CICE5) with JRA55-do and MERRA2 forcing
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Data from: Impact of temperature and nutrients on carbon: nutrient tissue stoichiometry of submerged aquatic plants: an experiment and meta-analysis
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Methane emission and sulfide levels increase in tropical seagrass sediments during temperature stress: a mesocosm experiment
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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
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.