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12,237 results for “2019”
Hyperspectral reflectance values and biophysicochemical properties of biocrusts and soils in the Fryxell Basin, McMurdo Dry Valleys, Antarctica (2019)
This data package includes ecological parameters of biocrust and soil from samples collected in-situ within the Lake Fryxell Basin of the McMurdo Dry Valleys, Antarctica during December of 2019. Parameters include biological (ash-free dry mass, pigment concentration, and counts of soil invertebrates), physical (water content, electrical conductivity, and pH), and chemical properties (inorganic nitrogen, inorganic phosphorous, total nitrogen, and total organic carbon) of the surface soil, biocrust, and underlying soil. This data package also contains reflectance measurements of biocrust, soil, and granite samples acquired in a laboratory using a hyperspectral spectrometer. Included are hyperspectral reflectance measurements of a laboratory study using a variety of mixtures of soil and biocrust (0 – 100% biocrust), as well as reflectance measurements of individual grab samples collected from each of the field plots. These data aid our understanding of the ecological structure and functioning of biocrust microhabitats as well as the location of these communities throughout the Lake Fryxell Basin. This work also aims to assist in understanding the carbon budget of the basin and highlight the importance of these snowpack-fed biocrust communities, which are understudied but likely an important piece of the overall carbon budget in this region.
Biophysicochemical properties, pigment concentrations, and nif gene counts of microbial mats and soils from Taylor and Beacon Valleys, McMurdo Dry Valleys, Antarctica (2019-2020)
This data package includes biophysicochemical properties, pigment concentrations, and nif gene counts from microbial mat and soil samples collected from the McMurdo Dry Valleys of Antarctica during the 2019-20 austral summer. Specifically, data include physicochemical properties of the collected soils (gravimetric water content, pH, electrical conductivity, inorganic nitrogen, inorganic phosphorous, sulfate, chloride, soil organic carbon, and total nitrogen), biological properties of the microbial mats (ash-free dry mass and pigment concentrations – scytonemin, scytonemin-red, myxoxanthophyll, zeaxanthin, chlorophyll-a, chlorophyll-b, β-carotene, canthaxanthin, echinenone), and nif gene counts (overall nif and nifH) of the soils and microbial mats. These data were collected to infer the functioning and nitrogen cycling abilities of microbial mat and soil communities from areas of differing landscape histories and geochemical legacies (Ross and Taylor tills in the Taylor Valley, and Beacon Cirque in Beacon Valley).
Hyporheic sediment characteristics from Von Guerard Stream, Taylor Valley, McMurdo Dry Valleys, Antarctica in January 2019
In this data package, we present chlorophyll concentrations, percent loss-on-ignition organic matter, sorbed ammonium concentrations, and percent biogenic silica for hyporheic sediments collected in January 2019 from nine transects across Von Guerard Stream, Taylor Valley, Antarctica. These samples were collected to address questions about the retention and processing of particulate organic matter in the hyporheic zone of McMurdo Dry Valley streams. The nine transects were located at pools, riffles, and meanders (three of each geomorphology type) along Von Guerard Stream and extended across the stream channel to the edges of the wetted zone, ranging from 6.6 to 13.6 m in length. At each sampling location, we collected subsurface bulk sediment down to a depth of 10 cm. We analyzed the sediment samples for chlorophyll-a, phaeophytin, loss-on-ignition, ammonium sorbed to the sediment, and the UV absorbance at 254 nm of sediment extractions. This data package is associated with a complementary data package that contains diatom community assemblages for the same samples.
Hyporheic diatom community assemblages from Von Guerard Stream, Taylor Valley, McMurdo Dry Valleys, Antarctica in January 2019
In this data package, we present diatom community assemblages from hyporheic sediments collected in January 2019 from six transects across Von Guerard Stream, Taylor Valley, Antarctica. These samples were collected to address questions about the retention and processing of particulate organic matter in the hyporheic zone of McMurdo Dry Valley streams. The six transects were located at pools, riffles, and meanders (three of each geomorphology type) along Von Guerard Stream and extended across the stream channel to the edges of the wetted zone, ranging from 6.6 to 13.6 m in length. At each sampling location, we collected subsurface sediment sample that was preserved in formalin directly after sample collection. We characterized diatom assemblages by counting a total of 300 diatom valves from each preserved diatom sample. This data package is associated with a complementary data package that contains hyporheic sediment chemistry for the same samples.
MCR LTER: Reef Topography data from Duvall et al., JGR Oceans 2019
This archive contains natural coral reef topography data from the southeast coast of Mo’orea, French Polynesia and idealized reef topography generated with a fractional Brownian motion (fBm) algorithm. These data were used to understand and compare different metrics for quantifying coral reef roughness. These data relate to this publication: Duvall, M. S., J. L. Hench, and J. H. Rosman, in press, Collapsing complexity: metrics to quantify multi-scale properties of reef topography. To appear in Journal of Geophysical Research (Oceans). This material is based upon work supported by the U.S. National Science Foundation under Grant No. OCE 16-37396 (and earlier awards) as well as a generous gift from the Gordon and Betty Moore Foundation. Research was completed under permits issued by the French Polynesian Government (Délégation à la Recherche) and the Haut-commissariat de la République en Polynésie Francaise (DTRT) (Protocole d'Accueil 2005-2018). This work represents a contribution of the Moorea Coral Reef (MCR) LTER Site.
MCR LTER: Coral Reef: Community structure outdoor flume data in support of Edmunds 2019 Marine Biology
This dataset contains data in support of Edmunds, P.J., S.S. Doo, R.C. Carpenter, 'Changes in coral reef community structure in response to year-long incubations under contrasting pCO2 regimes', Marine Biology, 2019, doi:10.1007/s00227-019-3540-2. Here, the effects of ocean acidification (OA) on back reef communities from Mo'orea, French Polynesia (17.492S, 149.826W), were tested from 12 November 2015 to 16 November 2016 in outdoor flumes maintained at various mean pCO2 levels. Change in mass and percent cover were recorded monthly. This material is based upon work supported by the U.S. National Science Foundation under Grant No. OCE 16-37396 (and earlier awards) as well as a generous gift from the Gordon and Betty Moore Foundation. Research was completed under permits issued by the French Polynesian Government (Délégation à la Recherche) and the Haut-commissariat de la République en Polynésie Francaise (DTRT) (Protocole d'Accueil 2005-2018). This work represents a contribution of the Moorea Coral Reef (MCR) LTER Site.
MCR LTER: Coral Reef: River chemistry dynamics in 2018 and 2019; data for Neumann et al., 2025 Scientific Reports
Rivers are the dominant avenue by which terrestrial efflux is transported to marine systems. Human activities on land, such as agriculture and infrastructure development, may impact coral reefs by disrupting historic biogeochemical processes of nearshore reef habitats. To identify how land use impacts rivers, and therefore nearshore lagoons, water chemistry was measured at a series of rivers around the island of Moorea, French Polynesia, in 2018 and 2019. Nitrate, Nitrite, Silicate, Phosphate, and Total Suspended Solids were evaluated at least weekly during sampling campaigns in rainy and dry seasons of both years. TSS was elevated following recent precipitation and negatively associated with watershed size. Phosphate was associated with Total Suspended Solids, presumably because of the phosphate-rich soils on Moorea. Dissolved Inorganic Nitrate was higher during the rainy season in watersheds with a high degree of land clearing. These results reinforce the importance of terrestrial factors for biogeochemistry of nearshore marine systems.
Lake snow removal experiment snow, ice, and Secchi depth, 2019-2021
Although it is a historically understudied season, winter is now recognized as a time of biological activity and relevant to the annual cycle of north-temperate lakes. Emerging research points to a future of reduced ice cover duration and changing snow conditions that will impact aquatic ecosystems. The aim of the study was to explore how altered snow and ice conditions, and subsequent changes to under-ice light environment, might impact ecosystem dynamics in a north, temperate bog lake in northern Wisconsin, USA. This dataset resulted from a snow removal experiment that spanned the periods of ice cover on South Sparkling Bog during the winters of 2019, 2020, and 2021. During the winters 2020 and 2021, snow was removed from the surface of South Sparkling Bog using an ARGO ATV with a snow plow attached. The 2019 season served as a reference year, and snow was not removed from the lake. This dataset represents the snow depths, black and white ice thickness, and Secchi depths during the period of ice cover each winter.
Lake snow removal experiment buoy, light, and chlorophyll data, 2019-2021
Although it is a historically understudied season, winter is now recognized as a time of biological activity and relevant to the annual cycle of north-temperate lakes. Emerging research points to a future of reduced ice cover duration and changing snow conditions that will impact aquatic ecosystems. The aim of the study was to explore how altered snow and ice conditions, and subsequent changes to under-ice light environment, might impact ecosystem dynamics in a north, temperate bog lake in northern Wisconsin, USA. This dataset resulted from a snow removal experiment that spanned the periods of ice cover on South Sparkling Bog during the winters of 2019, 2020, and 2021. During the winters 2020 and 2021, snow was removed from the surface of South Sparkling Bog using an ARGO ATV with a snow plow attached. The 2019 season served as a reference year, and snow was not removed from the lake. This dataset represents chlorophyll, light, and high frequency buoy data collected from this project. Related datasets are: https://doi.org/10.6073/pasta/962fa57959ff9828eb6f1cbda79b82c0 https://doi.org/10.6073/pasta/f6e271634a04819e25bc7c913cd67155 https://doi.org/10.6073/pasta/9a26e819522152e878d802df76cf90d7
Spatially Distributed Lake Mendota EXO Multi-Parameter Sonde Measurements 2019-2022
This data was collected over 34 sampling trips during four summers (May-October), 2019-2022. 35 grid boxes were generated over Lake Mendota. Before each sampling effort, sample point locations were randomized within each grid box. Surface measurements were taken with an EXO multi-parameter sonde at a subset of the 35 grid boxes throughout Lake Mendota during each sampling trip. Measurements include temperature, conductivity, chlorophyll, phycocyanin, turbidity, dissolved organic material, ODO, pH, and pressure.
Cascade Project at North Temperate Lakes LTER High Frequency Sonde Data from Spatial Dynamics Experiment 2018 - 2019
High-frequency continuous data for temperature, dissolved oxygen, pH, chlorophyll-a, and phycocyanin in Paul Peter lakes from mid-May to early September for the years 2018 and 2019. Inorganic nitrogen and phosphorus were added to Peter in 2019, while Paul Lake was an unfertilized reference.
Infilled climate data for C1, Saddle, and D1, 1990 - 2019, hourly.
This serially complete dataset includes hourly, quality-controlled, infilled meteorological data for three sites at the Niwot Ridge LTER: C1, Saddle, and D1, representing subalpine, alpine, and high-alpine environments, respectively. Raw observations of air temperature, relative humidity, wind speed, and incoming shortwave radiation were subjected to a rigorous hierarchical quality control and infilling protocol to make a robust, continuous dataset. Incoming longwave radiation was estimated using air temperature, relative humidity, and incoming shortwave radiation. Precipitation data were accessed from the Niwot Ridge LTER quality controlled datasets and Kittel et al. (2015). Precipitation values from C1 and Saddle were then corrected for gage undercatch (C1) and overcatch (Saddle) based on observations of snow accumulation at the Niwot SNOTEL station and snow pits located near the met stations (D1 precipitation data were not corrected as there were no available observation of snow accumulation). Daily precipitation values were temporally disaggregated to the hourly time step of the dataset. This dataset was originally created to force a physics-base snow model and is suitable for use in other research models that require hourly forcing data. Please contact the dataset's creators or the LTER data manager if you have any questions regarding the data or its applicability/suitability to your project. Disclaimer: These data come as-is with no warranty. The user must decide whether or not to use different variables and time periods within the dataset and whether further processing is warranted. In general, the data quality is higher and there are fewer infilled values from 2000 to 2013. The higher number of infilled entries before 2000 may preclude the 1990–1999 period from being used in a given analysis. This is particularly true for relative humidity and incoming solar radiation. The Niwot Ridge LTER is not responsible for the methodological choices made by those using
Potentilla flowering phenology for Cabin Clearing, Elk Meadows and Rainbow Meadows, 2019.
To understand parent-hybrid dynamics in cinquefoil (Potentilla) species in the Colorado Rocky Mountains, I am estimating environmental overlap among parents and hybrids, interbreeding among parents and hybrids, and hybrid population growth in multiple natural populations at NWT and (not included here) the Rocky Mountain Biological Laboratory (RMBL). Since 2018, I have been monitoring populations at Rainbow Meadows Lower, Rainbow Meadows Upper, Elk Meadows South, and Cabin Clearing - sites that vary in cinquefoil composition. In 2019, my team and I recorded reproductive phenophases (e.g., vegetative, buds, flowering, setting seed) on tagged plants in June, July, and August. When plants began flowering, we estimated floral counts. Characterizing flowering phenology of parent and hybrid species in each site sheds light on the potential for ongoing interbreeding in different environments. NWT phenological data is shared here, and soil moisture and trait data from demographic monitoring are provided separately. This data was collected to test broad hypotheses about hybrid-parent dynamics in changing montane environments.
Potentilla plot soil moisture for Cabin Clearing, Elk Meadows and Rainbow Meadows, 2019.
To understand parent-hybrid dynamics in cinquefoil (Potentilla) species in the Colorado Rocky Mountains, I am estimating environmental overlap among parents and hybrids, interbreeding among parents and hybrids, and hybrid population growth in multiple natural populations at NWT and (not included here) the Rocky Mountain Biological Laboratory (RMBL). Since 2018, I have been monitoring populations at Rainbow Meadows Lower, Rainbow Meadows Upper, Elk Meadows South, and Cabin Clearing - sites that vary in cinquefoil composition. In 2019, my team and I recorded reproductive phenophases (e.g., vegetative, buds, flowering, setting seed) on tagged plants in June, July, and August. When plants began flowering, we estimated floral counts. Characterizing flowering phenology of parent and hybrid species in each site sheds light on the potential for ongoing interbreeding in different environments. NWT soil moisture are provided here, demographic and phenological data are shared separately. This data was collected to test broad hypotheses about hybrid-parent dynamics in changing montane environments.
Individual and community flowering phenology, seed counts and pollinator visitation rates in shrub and open plots across Niwot Ridge, 2019 - 2021.
Climate-change induced alterations in environmental conditions in the alpine tundra has led to the expansion of woody shrubs, known as “shrubification.” Shrubification is thought to change microclimatic conditions, potentially leading to changes in plant community composition. Shrubification has been taking place at Niwot Ridge, a Long Term Ecological Research site nestled in the mountains of Colorado, for the past 40 years. Thus far, Niwot Ridge has seen some change in alpine plant communities due to shrubification, and changes in plant reproductive capacity and success could lead to future alterations of community composition. One important aspect in plant reproductive success is the timing of flowering, known as flowering phenology. Flowering phenology is controlled partially by environmental conditions, and thus is somewhat plastic for many species. In the first part of my thesis, I explore how shrubification may be causing changes in flowering phenology for 21 different plant species in the alpine tundra community at Niwot Ridge. I conducted an observational study over three years, monitoring the number of flowers present in 54 pairs of shrub-influenced and open plots, totaling 108 plots. I found that there is no difference in the flowering phenology between open and shrub-influenced plots. There is a measurable difference in the number of flowers produced between shrub and open plots, with open plots having more flowers on average, This difference is likely due to there being fewer plants in shrub-influenced plots. A second aspect explores shrub effects on the reproductive success of five different alpine species. In the field season of 2021, I took seeds from these five species from 12 pairs of shrub and open plots, totaling 24 plots. I counted and weighed the seeds to determine reproductive success; there was no difference in reproductive success between shrub and open plots.
PIE LTER, Hach, OTT RLS measurements of water column depth at 15 minute intervals in the lower Plum Island Sound off the Ipswich Bay Yacht Club pier, Ipswich, MA, year 2019.
Measurements of water column depth at 15 minute intervals in Plum Island Sound at the Ipswich Bay Yacht Club, for year 2019. OTT radar level sensor (RLS) installed September 20, 2011 out of the water under the concrete pad on the Ipswich Bay Yacht Club pier, Ipswich, MA. RLS was mounted so that continuous year round measurements can be conducted without the concern of ice flows damaging the sensor.
PIE LTER year 2019, meteorological data, 15 minute intervals, from the PIE LTER Marshview Farm weather station located in Newbury, MA.
Year 2019 meteorological measurements at MBL Marshview Farm of air temperature, humidity, precipitation, solar radiation, photosynthetically active radiation (PAR), wind speed and direction and barometric pressure. Sensors conduct measurements every 5 secs and measurements are reported as averages or totals for 15 minute intervals. 15 minute averages are reported for air temperature, humidity, solar radiation, PAR, wind speed and direction and barometric pressure. 15 minute totals are reported for precipitation.
Year 2019, PIE LTER wind sensor data, 15 minute intervals, from the Ipswich Bay Yacht Club pier located in Ipswich, MA
Wind sensor measurements (wind speed and wind direction) for 2019 at the Ipswich Bay Yacht Club, Ipswich, MA, 15 minute average measurements.
PIE LTER, Year 2019, 15 minute interval, water quality measurements of water column temperature, salinity, oxygen, and depth near the mouth of Plum Island Sound, Massachusetts
Year 2019, 15 minute measurements of water column temperature, salinity, oxygen and depth in Plum Island Sound at the Ipswich Bay Yacht Club, Ipswich, MA.
PIE LTER marsh water table height, logging data from the Nelson Island Spartina marsh site for April-November 2019, Rowley, MA.
Measurements of water table height in the Nelson Island marsh located near Nelson Island eddy flux tower, Rowley MA. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Nelson stream bank at Nelson Island, MAR-PR-Wtable-Nel for April-November 2019.
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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.