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Measurements of Leaf area, foliar C and N for 14 sites along a transect down the Kuparuk River basin, summer 1997, North Slope, Alaska.
1997 measurements of Leaf area, foliar C and N for 14 sites along a transect down the Kuparuk River basin, North Slope, Alaska.
Soil Moisture (Tensiometer) Measurements at LTER Floodplain Moisture Exclusion Treatment Plots: 1991-2003 (weekly)
Soil moisture measurements taken with tensiometers in both the control and rainout treatment plots at floodplain sites (FP3A, FP3B and FP3C); performed weekly during summer from 1991-2003.
Soil Moisture Tension Measurements at LTER Floodplain Successional Sites (FP1A,FP2A,FP4A): 1985-2003 (hourly)
Soil moisture tension readings were collected hourly during summer months at LTER Floodplain Successional Sites (FP1A, FP2A and FP4A) with a Campbell data logger from 1985 until 2003.
Soil Moisture (TDR) Measurements at FP2A: 1993-1995
Soil moisture readings were collected hourly during summer months at FP2A with a Campbell data logger and Tektronix1502B Cable tester from 1993 until 1995.
Soil Moisture (TDR), Temperature, and Precipitation Measurements at UP2A Moisture Exclusion Treatment Plots: 1996-2000
Soil moisture and temperature readings taken with Campbell datalogger and Tektronix1502B Cable tester within control plot and summer rain exclusion plot.
Downed Woody Debris measured in study plots at the Murphy Dome study site
This file contains estimates of fine and coarse woody debris present in study plots.
Survey 200 long term study of multiple sites in central Arizona-Phoenix: human activity related measurements
The Ecological Survey of Central Arizona (ESCA) is an extensive field survey and integrated inventory designed to capture key ecological indicators of the CAP LTER study area consisting of the urbanized, suburbanized, and agricultural areas of metropolitan Phoenix, and the surrounding Sonoran desert. The survey is conducted every five years at approximately 200 sample plots (30m x 30m) that were located randomly using a tessellation-stratified dual-density sampling design. Study plots cover habitats throughout the CAP LTER study area ranging from native Sonoran desert sites to residential yards to an airport tarmac. Measurements include an inventory of all plants (identified to the lowest possible taxonomic unit, typically species), plant biovolume, soil coring for physicochemical properties, arthropod sweep-net sampling, photo documentation, and a visual survey of site and area characteristics. The objectives of the survey are to (1) characterize patches in terms of key biotic, physical, and chemical variables, and (2) examine relationships among land use, general plant diversity, native plant diversity, plant biovolume, soil nutrient status, and social-economic indices along an indirect urban gradient. Survey 200 was the original name of the project, and it was renamed to ESCA following the survey conducted in 2015. The data set here includes a subset of information from the Survey200/ESCA focusing exclusively on buildings and indicators of human activity in the survey plots. Investigators interested in more recent survey data, or other variables measured as part of ESCA should search the data catalog for 'ecological survey of central arizona' or 'survey 200'.
Estimates of surface layer net community production based on underway Lagrangian measurements of the dissolved O2/Ar ratio using Equilibrator Inlet Mass Spectrometry (EIMS), based on both steady-state and non-steady-state assumptions of the mixed-layer biological oxygen budget. Also included are estimates of the potential contribution of vertical fluxes: advection, eddy diffusion, and entrainment.
The ratio of dissolved oxygen to argon in surface seawater is frequently employed to estimate rates of net community production (NCP) in the oceanic mixed layer. The in situ O2/Ar-based method accounts for many physical factors that influence oxygen concentrations in the surface ocean, permitting isolation of the biological oxygen signal produced by the balance of photosynthesis and respiration. However, this technique traditionally relies upon several assumptions when calculating the mixed layer O2/Ar budget, most notably the absence of vertical fluxes of O2/Ar and the existence of a steady-state balance between net productivity and the air-sea gas exchange of biological oxygen. Employing a Lagrangian study design and leveraging data outputs from a regional physical oceanographic model, we conducted in situ measurements of O2/Ar in the California Current Ecosystem in spring 2016 and summer 2017 to evaluate these assumptions within a ‘worst-case’ field environment. Quantifying the magnitude of vertical fluxes and comparing NCP estimates obtained using steady-state versus non-steady-state assumptions, we find the importance of the non-steady-state term to be considerable, also observing significant potential effects from vertical flux terms, particularly advection. Additionally, we observe strong diel variability in O2/Ar and calculated NCP rates at multiple stations. Our results reemphasize the importance of accounting for vertical fluxes when interpreting O2/Ar-derived NCP data as well as the potentially large effect of non-steady-state conditions, including diel cycles in surface O2/Ar that can bias interpretation of NCP data based on local productivity and the time of day at which measurements were made.
Estimates of mixed lyer gross primary productivity and photophysiology based on underway Lagrangian measurements of the dissolved chlorophyll fluorescence of phytoplankton usung Fast Repetition Rate Fluorometry (FRRF)
GPP was estimated on the P1706 cruise based on the photo-physiology of the mixed-layer phytoplankton community measured by FRRF. Shipboard measurements were made using a bench-top FastAct 2+ Fast TRAKA instrument (Chelsea, UK) plumbed into the ship’s running seawater system. Photosynthesis versus irradiance (P vs. E) curves were run continuously on a ~45 min sampling interval.
Secchi disk depth (ZSD) measurements in the California Current 1949-2021
The Secchi disk depth (ZSD) measurements made in the California Current 1949-2021 were compiled from multiple sources but mostly from the California Cooperative Oceanic Fisheries Investigations (CalCOFI) cruises. An earlier version of this dataset was described in Aksnes, D.L., and M.D. Ohman. 2009. Multi-decadal shoaling of the euphotic zone in the southern sector of the California Current System. Limnol. Oceanog. 54, 1272–1281. This updated dataset was used in Kahru, M., Z. Lee, and M.D. Ohman. 2023. Multidecadal changes in ocean transparency: decrease in a coastal upwelling region and increase offshore. Limnol. Oceanogr., in press.
Soil nitrate and ammonium: Multiple Traits of Multiple Plant Species Measured in Monoculture Gardens
These gardens were started in order to establish monocultures of several species of native prairie plants common to Cedar Creek.
Root carbon/nitrogen data: Multiple Traits of Multiple Plant Species Measured in Monoculture Gardens
These gardens were started in order to establish monocultures of several species of native prairie plants common to Cedar Creek.
Plant aboveground biomass carbon and nitrogen: Multiple Traits of Multiple Plant Species Measured in Monoculture Gardens
These gardens were started in order to establish monocultures of several species of native prairie plants common to Cedar Creek.
Plant aboveground biomass data: Multiple Traits of Multiple Plant Species Measured in Monoculture Gardens
These gardens were started in order to establish monocultures of several species of native prairie plants common to Cedar Creek.
Hourly climate data: Meterologic Measurements at Cedar Creek Natural History Area
Meteorological measurements include air temperature, precipitation, wind speed and direction, soil temperature, and relative humidity. These measurements are taken on an hourly basis.
Monthly precipitation from Fort Snelling near MPLS airport: Meterologic Measurements at Cedar Creek Natural History Area
Meteorological measurements include air temperature, precipitation, wind speed and direction, soil temperature, and relative humidity. These measurements are taken on an hourly basis.
Functional traits measured in a greenhouse common garden: Investigating patterns of habitat specialization in fifteen co-occurring willow and poplar species.
Thirteen willow (Salix) species occur in southeastern Minnesota and often co-occur within the same wetlands. This high local diversity is challenging to explain since closely related species are often functionally similar and density-dependent interactions such as competition and susceptibility to pests and pathogens should limit their co-occurrence. However, if willow species are partitioning resources, or if they are phylogenetically structured so that closely related species rarely co-occur, then the impact of these density-dependent processes could be reduced. In this study, I examined the role of niche partitioning in maintaining local willow diversity by documenting species distributions in plots across a water availability gradient and comparing species physiology in the field and greenhouse. By taking a phylogenetic approach, I also investigated whether willow communities exhibit phylogenetic community structure and whether there is evidence for environmental filtering.
Functional traits measured under field conditions in native populations: Investigating patterns of habitat specialization in fifteen co-occurring willow and poplar species.
Thirteen willow (Salix) species occur in southeastern Minnesota and often co-occur within the same wetlands. This high local diversity is challenging to explain since closely related species are often functionally similar and density-dependent interactions such as competition and susceptibility to pests and pathogens should limit their co-occurrence. However, if willow species are partitioning resources, or if they are phylogenetically structured so that closely related species rarely co-occur, then the impact of these density-dependent processes could be reduced. In this study, I examined the role of niche partitioning in maintaining local willow diversity by documenting species distributions in plots across a water availability gradient and comparing species physiology in the field and greenhouse. By taking a phylogenetic approach, I also investigated whether willow communities exhibit phylogenetic community structure and whether there is evidence for environmental filtering.
Soil moisture near the surface measured by Thetaprobe:BAC: Biodiversity and Climate
Climate changes forecast for our region by GCM???s and shifts in biodiversity and composition each have the potential to alter ecosystem functioning; their interactive effects are unknown. The "BAC" experiment is designed to determine the direct and interactive effects of plant species numbers, plant community composition, temperature, and precipitation on 11 productivity, C and N dynamics, stability, and plant, microbe, and insect species abundances in CDR grassland ecosystems.
Maximum soil depth measurements from the Terrestrial Gradient plots at the Coweeta Hydrologic Lab in Macon County, NC.
Maximum soil depths were assessed as part of the soil chemistry studies at the gradient plots at the Coweeta Hydrologic Laboratory in Macon County, North Carolina. There were 5 sites representing an elevational gradient and different forest types. A soil probe was used to estimate the maximum soil depth of each of the 80 x 80 -m plots at each site.
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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.