Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
10,554
datasets available to search
ShareScore release 0.8.0
Dataset results
10,554 results for “measurements”
Seeing the light: high temporal frequency (5-10min resolution) measurements of dissolved oxygen, photosynthetically active radiation, temperature, and depth used to estimate metabolism in restored and unrestored Baltimore streams.
The continually increasing global population residing in urban landscapes impacts numerous ecosystem functions and services provided by urban streams. Urban stream restoration is often employed to offset these impacts and conserve or enhance the various functions and services these streams provide. Despite the assumption that ‘if you build it, [the function] will come’, current understanding of the effects of urban stream restoration on stream ecosystem functions are based on short term studies which may not capture variation in restoration effectiveness over time. We quantified the impact of stream restoration on nutrient and energy dynamics of urban streams by studying 10 urban stream reaches (five restored, five unrestored) in the Baltimore, Maryland, USA, region over a two-year period. We measured gross primary production (GPP) and ecosystem respiration (ER) at the whole-stream scale continuously throughout the study and nitrate (NO3-N) spiraling rates seasonally (spring, summer, autumn) across all reaches. There was no significant restoration effect on NO3-N spiraling across reaches. However, there was a significant canopy cover effect on NO3-N spiraling, and directly comparing paired sets of unrestored-restored reaches showed that restoration does affect NO3-N spiraling after accounting for other environmental variation. Furthermore, there was a change in GPP:ER seasonality, with restored and open-canopied reaches exhibiting higher GPP:ER during summer. The restoration effect, though, appears contingent upon altered canopy cover, which is likely to be a temporary effect of restoration and is a driver of multiple ecosystem services, e.g., habitat, riparian nutrient processing. Our results suggest that decision-making about stream restoration, including evaluations of nutrient benefits, clearly needs to consider spatial and temporal dynamics of canopy cover and tradeoffs among multiple ecosystem services. Here we provide the raw dissolved oxygen, temperature, li
Height and diameter measurement of spruce in response to harvest: 1993 - 2002
To document possible soil nitrogen mosaics before timber harvesting on three Alaskan boreal forest sites, maps of the distribution of understory green and Sitka alder stems were made. Understory alders were regularly distributed throughout the northernmost site (Standard Creek), and very irregularly distributed at the southernmost site (Cooper Landing). There were no consistent relations between alder stem location and total soil nitrogen. In undisturbed forest, soils collected beneath alders tended to have more nitrogen than soils without alder, but after the sites were harvested, soil chemistry differed. To examine the interactions of alder (Alnus crispa (Ait.) Pursh and A. sitchensis (Reg.) Rydb.) and white spruce (Picea glauca (Moench) Voss) on secondary successional sites, mixed plantations of white spruce and alder were established after each site was harvested. Despite good survival, the planted alder grew poorly. There were no differences between nursery-grown alder seedlings and alder wildlings in either growth or survival. Though fifth-year survival and growth of white spruce were excellent on all sites, they were not related to either the pre-harvest distribution of naturally occurring alder or to alders planted in the mixed plantations. Locational information and site maps are provided to encourage future evaluation of these plantations.
Black spruce allometric measurements: 2000 - 2001
Forty black spruce (Picea mariana) individuals were measured and harvested across four sites in Interior Alaska during 2000-2001. This dataset was created to develop site-specific allometric equations for black spruce.
Soil Moisture (TDR) Measurements at LTER Moisture Exclusion Treatment Plots: 1994-Present (weekly)
Soil volumetric water content measurments made with Campbell datalogger and Tektronix1502B cable Tester in control and summer rain exclusion treatment plots.
Soil Temperature Measurements at LTER Floodplain Successional Sites (FP1A,FP2A,FP4A): 1985-present (hourly)
Soil temperature readings were collected hourly during summer months at LTER Floodplain Successional Sites (FP1A, FP2A and FP4A) with a Campbell data logger beginning in 1985.
Soil Moisture (TDR), Temperature, and Precipitation Measurements at FP3A Moisture Exclusion Treatment Plots: 2002-Present
Soil moisture and temperature readings taken with Campbell datalogger and Tektronix1502B Cable tester within control plot and summer rain exclusion plot.
Artificial Communities Seedling Growth: Bonanza Creek Experimental Forest (planted in 1989; measured in 1992, 1995, and 2002).
This study considers the relative role of competition and facilitation in primary succession of the boreal forest floodplain of Bonanza Creek Experimental Forest. Alder (Alnus tenuifolia Nutt.) is an early colonist of young floodplain sites, where it contributes greatly to soil development through the addition of nitrogen to the soil. White spruce (Picea glauca (Moench.) Voss) typically colonizes such sites later; it becomes established beneath a canopy of alder and willow (Salix spp.) which is sometimes overtopped by young balsam poplar (Populus balsamifera L.). The alder may potentially influence white spruce both positively and negatively. Possible facilitative effects include protection of small seedlings from excess heat or heavy siltation accompanying flooding and addition of soil nitrogen, an effect that may extend for many years. Competition for light (and other resources) before the white spruce has overtopped the alder canopy may prove to be a major negative effects. This study seeks to determine the net balance of these effects on the floodplain successional sequence by planting spruce seedlings with and without the presence of alder. Plots of white spruce seedlings were planted in 1989 on an early successional silt bar with and without alder in the Bonanza Creek Experimental Forest. Biomass by species and carbon and nitrogen pools of plants and soils were measured in 2002. Height and survivorship of spruce seedlings were measured in 1992, 1995, and 2002. White spruce grew more rapidly in the presence of alder during the first six years. After 13 years, however, seedlings planted with alder experienced high mortality due to intensive browsing by snowshoe hares. Alder resulted in greater total biomass and larger carbon and nitrogen pools in plants and soils.
Bonanza Creek Experimental Forest: Weekly TDR measurments at core upland and floodplain sites.
Weekly measurements of soil moisture detected with Time Domain Reflectometry using a TRASE TDR system that was operated from 1992 through 2002.
Core Meteorological Measurements for the APEX Alpha Fen Bonanza Creek Experimental Forest: 2007-Present
Air temperature, relitive humidity, barometric pressure, net radiation, and precipitation were recorded every half hour at the APEX alpha Fen. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment).
Eight Mile Lake Research Watershed, Thaw Gradient: Growing season CO2 fluxes and several ecosystem measurements, growing season 2006-2007.
This dataset contains growing season CO2 fluxes, aboveground biomass, soil temperature, volumetric moisture content, seasonal thaw depth, and NDVI measured at 50 grid points along EML gradient sites measured.
Soil DOC and moisture measurements along climate and black spruce productivity gradients in interior Alaska
Water-soluble organic carbon data extracted from organic and mineral soils along gradients in stand productivity and soil temperature throughout 2004. 200g of organic soil or 400g of mineral (5 cm) soil were used. Values should be corrected for oven dry moisture percent of soil (also included in data set). Nine soil cores were obtained randomly on a 20 x 20 m sampling grid at each site in May, June-July, and again in September 2004. Cores were parsed in the field into organic (Oi+Oe+Oa) and mineral soil (5 cm, A+B). All cores were immediately sealed in polyethylene bags and were kept on ice in an insulated cooler while being transported to laboratory refrigerators kept at approximately 4 degC. All organic soil samples were extracted for WSOC content within 24 hours, and mineral soils were extracted within 48 hours. Water-soluble organic C concentrations from subsets of mineral soils extracted 24 and 48 hours after collection did not significantly differ (p = 0.30, 5.3 mg C l-1). The method for extracting WSOC from the soil followed Huang and Schoenau (1996), which was modified from McGill et al. (1986). Briefly, field moist soil samples were homogenized on a tray and roots greater then 2 mm were removed. Then 20 g of organic soil or 40 g of mineral soil were gently shaken on a rotary table with 100 ml (n = 9 per horizon per date) of deionized water for 1 hour, filtered through a Whatman GF/A filter, and then passed through a Whatman 0.45 um membrane filter. Soil extracts were preserved at pH 2 using H3PO4 and refrigerated at 4 degC prior to analysis. Each field moist soil sample was subsampled to determine moisture content (gravimetrically) and WSOC was adjusted to an oven-dry basis. Bulk density and depth measurements for each soil horizon were used to relate mg WSOC kg oven dry soil-1 on an area basis at each site (g WSOC m-2). Three zero-tension lysimeters (85 x 19 cm) were installed perpendicular to slope at the organic-mineral soil interface at the end of the g
Soil respiration measurements along climate and black spruce productivity gradients in interior Alaska
Soil respiration measurements were made using an infrared gas analyzer (IRGA; EGM-4 gas analyzer, PP Systems, Haverhill, MA) with a dynamic soil respiration chamber (SRC-2, PP Systems). Respiration collars (18) were randomly located on three 20 x 20 m sampling grids (separate from WSOC collection) at each site. The respiration collars (10.2 cm diameter schedule 40 polyvinyl chloride) were inserted to a depth of 2.5 cm at least 1 week prior to initial measurements and were left in place for the duration of the experiment. Care was taken to ensure that the collars remained at the same depth throughout the measurement period. All vascular plants were removed from the collars prior to measuring. Measurements were made approximately bi-weekly at each site, from May through September in 2004 (n = 5 or 6). A portable thermometer was used to measure soil temperature at 10 cm below the surface concurrently with soil respiration measured at each collar. Changes in collar-specific air volumes (caused by changes in microtopography and the presence of moss) were measured directly through use of the ideal gas law by injecting 25 cm-3 of 3500 mg m-3 CO2 into the soil respiration chamber and measuring the subsequent dilution of CO2 concentration with the IRGA. All flux values have been adjusted for these collar specific volumes.
Organic layer thickness measurements from burned and unburned black spruce forests in Alaska collected between 1994 and 2012
This dataset contains organic layer thickness measurements collected in mature burned and unburned black spruce stands located throughout interior Alaska. These data were collected as part of a number of studies between 1994 and 2012 in order to quantify variations in organic layer thickness and estimate organic layer carbon in burned and unburned black spruce stands. Data were collected in sites located on a number of topographic positions, and collected in sites that burned during different time periods during the fire season. Measurements that were collected at most sites included either the total thickness of the surface organic layer, or the thickness of individual layers within the organic layer. These layers include: moss (including green and brown), fibric soil, mesic soil, humic soil, and char. Beginning in 2005, data on the height of adventitious roots above mineral soil were collected and used to estimate the pre-burn organic layer thickness.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR) Extended sites: winter ecosystem respiration chamber measurements using snow removal method. Oct-Nov 2009, Oct-Dec 2011, Oct-Nov; March-April 2012, Feb-May 2013.
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This dataset contains point measurements of winter ecosystem respiration fluxes using the snow removal method and the soil temperature, air temperature, and snow depth associated with each flux.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Winter ecosystem respiration measurements using soda lime, 2010-2019
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Soda Lime absorption of CO2 over the winter season is a method of estimating cumulative soil respiration across the site.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Fall ecosystem respiration chamber measurements, 2009; 2011-2013.
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This dataset contains static chamber measurements of CO2 flux at CiPEHR during the falls of 2009,2011, 2012, and 2013.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Fall ecosystem respiration chamber measurements, 2011,2013.
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warmign affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment (DryPEHR), which is situated with the Carbon in Permafrost Experimental Heating Research (CiPEHR) project and located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Warming treatment here refers to growing season air temperature warming (~1C) using open top chambers (OTC) combined with soil 'warming' using snow fences during the snow covered months. Drying is achieve using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. This dataset contains static chamber measurements of CO2 flux at DryPEHR during the falls of 2011 and 2013.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Winter ecosystem respiration chamber measurements using on-plot method, Oct 2012-May 2013.
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This dataset contains point measurements of winter ecosystem respiration fluxes using the on-plot method and the soil temperature, air temperature, and snow depth associated with each flux.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Winter ecosystem respiration chamber measurements using on-plot method, Oct 2012-May 2013.
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warmign affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment (DryPEHR), which is situated with the Carbon in Permafrost Experimental Heating Research (CiPEHR) project and located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Warming treatment here refers to growing season air temperature warming (~1C) using open top chambers (OTC) combined with soil 'warming' using snow fences during the snow covered months. Drying is achieve using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. This dataset contains point measurements of winter ecosystem respiration fluxes using the on-plot method and the soil temperature, air temperature, and snow depth associated with each flux.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Half-hourly growing season, chamber-based, CO2 flux data, with dark daytime measurements, 2014
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. How does warming impact the phenology of dominant plant species? This data contains CO2 fluxes measured using an automated chamber system that measures net CO2 exchange (NEE). Measurements are made every ~1.5 hours and modeled half-hourly. Half hour ecoystem respiration is modeled using an exponential Q10 relationship when light conditions are low (PAR<5umol/m2/s) and using a hyperbolic light relationship when PAR>5umol/m2/s. Addditional dark daytime Reco measurements were used to define the Q10 model. GPP is calculated as the difference between NEE and Reco.
ScienceDex guides
Understand access before you commit
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.