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21,983 results for “UNITE”
Combined data on plant species abundance and composition from LTER and other grasslands in the United States, 1943 - 2010
Understanding how biotic mechanisms confer stability in variable environments is a fundamental quest in ecology, and one that is becoming increasingly urgent with global change. Several mechanisms, notably a portfolio effect associated with species richness, compensatory dynamics generated by negative species covariance and selection for stable dominant species populations can increase the stability of the overall community. While the importance of these mechanisms is debated, few studies have contrasted their importance in an environmental context. We compiled nine long-term datasets of grassland species composition to evaluate the strength of biotic mechanisms of community stability and assess how these mechanisms change across precipitation gradients. Data were collected in replicate plots over time at nine different sites throughout the US (replicates within a site range from 5-100, plot sizes from 0.1 m² to 17 m²; minimum 9 years, maximum 30 years). Species abundance was measured as either percent cover, biomass, or allometrically-derived biomass. At all sites the measurement techniques and management regimes remained constant over the collection period, and the data collection methods were not relativized. For example, sites in which species composition were measured as percent cover do not require their estimates to sum to 100. For sites with long-term experimental treatments, only the control plots were included. These data have been presented in: Lauren M. Hallett, Joanna S. Hsu, Elsa E. Cleland, Scott L. Collins, Timothy L. Dickson, Emily C. Farrer, Laureano A. Gherardi, Katherine L. Gross, Richard J. Hobbs, Laura Turnbull, Katharine N. Suding. 2014. Biotic mechanisms of community stability shift along a precipitation gradient. Ecology 95:1693–1700. http://dx.doi.org/10.1890/13-0895.1
American Residential Macrosystems - Soil chemistry data within parks and residential yards in six major metropolitan areas in the United States, 2017-2018
"In six major U.S. metropolitan cities (Boston, Baltimore, Los Angeles, Miami, Minneapolis St. Paul, and Phoenix), 1 meter soil cores were collected to evaluate soil microbial carbon and nitrogen cycle processes that are sensitive to land management. Laboratory methods followed those used by Raciti et al. (2011a,b) to measure microbial biomass carbon and nitrogen content, microbial respiration, potential net nitrogen mineralization, potential net nitrifcation, potential denitrifcation, and pools of extractable ammonium and nitrate. "
Fire history database of the western United States, 1994
To create a database of existing published and unpublished tree-ring reconstructions of fire regimes in forested areas, before circa 1900, west of 100 W longitude in the continental United States, exclusive of Alaska. The studies included in the database are restricted to tree-ring reconstructions of fire history and the information extracted includes citations to the data sources, site information, estimated fire regimes, and information on individual fire events (when readily available). Fire regimes vary greatly across short distances in the western United States, so that a reconstruction of fire history over a small area may not represent the history of a larger area. Therefore, we extracted information on the size of the study area and the amount of fire evidence (number of trees scarred and/or number of tree origin dates) used in computing the fire regimes to allow the user to gauge the applicability of each reconstruction to larger areas.
Hydrologic response units (base units for PRMS streamflow model), Andrews Experimental Forest, 1993
Hydrologic Response Units are used as base units for the Precipitation-Runoff Modeling System (PRMS) streamflow model. Created by Alok Sikka as part of landscape runoff modeling.
Dimensions, cover, volumes, mass and nutrient stores of Coarse Woody Debris (bark and wood from logs, snags, and stumps) from forests plots in the western United States and Mexico, 1977 to 2005
These data provide an inventory of the mass and nutrients stored within various forest types by coarse woody debris (CWD). CWD inventoried includes standing dead trees (greater than 10 cm diameter at breast height) and dead and downed wood (greater than 10 cm large end and >1 long). The majority of measurements are from permanent sample plots associated with the Andrews LTER permanent sample plots network. This includes clusters of plots at and near the H. J. Andrews Experimental Forest (OR), Cascade Head Experimental Forest (OR), Mount Rainier National Park (WA), Olympic National Park (WA), and Fraser Experimental Forest (CO). There are also data from plots in the Yucatan in Mexico; however, the live tree data for these plots is not available. The species of CWD inventoried are primarily those found in the Pacific Northwest; the dominants being Douglas-fir, western hemlock, mountain hemlock, western redcedar, Pacific silver fir, noblel fir, lodgepole pine, ponderosa pine, sitka spruce, and Englemann spruce. The majority of measurements were made in the 1975 to 1995 period; however plots are periodically remeasured and the intent to eventually remeasure all the plots except those in Mexico. In each plot measurements of log and snag dimensions (length and diameters), as well as decay class and species were recorded in the stands (td01201 file). These dimension data are combined with data on density and nutrient content for each species and decay class (td01202 file) and plot area and slope (td01203 file) to calculate CWD volume, cover, biomass and nutrient storage (td01204 file). When data on density and nutrient concentrations is not known, a list of substitutions is used (td01206). The adjust tree diameters if measurements are taken at the base of the dead tree, taper regressions are used (td01205).
Operational taxonomic units characterizing fungal communitties associated with resprouting Betula nana shrubs sampled across a fire-severity gradient in the Anaktuvuk River Fire burn scar, 2010
The dataset contains fungal community data from a sampling campaign in 2009, two growing seasons after the Anaktuvuk River Fire. We used molecular tools, including ARISA and fungal ITS sequencing, to characterize the mycorrhizal communities on resprouting Betula nana shrubs across a fire-severity gradient. Summarized data can be viewed by site and provide information on richness and abundance of basidiomycetes and ascomycetes andChao1 and MaoTau estimators of richness. OTU data are provided for each shrub sampled in the study.
Throw trap and electrofishing data collected during 1996–2022 from the Everglades, Florida, United States for the publication "Contrasting invasion histories and effects of three non-native fishes observed with long-term monitoring data"
This dataset was used to analyze the effects of three non-native fishes in the Florida Everglades for a publication in the journal Biological Invasions. The dataset incorporates plot-level mean densities (# of individuals per square meter) of common aquatic animals collected during 1996–2022 from 17 sites across three regions of the Everglades: Taylor Slough, Shark River Slough, and Water Conservation Area 3A. Prey species included are nine common small fishes and three common decapod species (two crayfish species and grass shrimp). The dataset includes throw trap data on three predator taxa: African Jewelfish (Hemichromis letourneuxi), Mayan Cichlids (Mayaheros uruphthalmus), and sunfishes (Lepomis spp.). Annual indices of mean wet season electrofishing catch-per-unit-effort of Asian Swamp Eels (Monopterus albus/javanesis), Mayan Cichlids, sunfishes, and the three other large 'top predator' fishes (Amia calva, Lepisosteus platyrhincus, Micropterus salmoides) are included for plots where electrofishing was performed from 1997-2021. Hydrologic measures used in analyses and R code used to conduct analyses are also included.
Hubbard Brook Experimental Forest Major Vegetation Units: GIS Shapefile
Diazo copy of Hubbard Brook Major Vegetation Units Map. UTM coordinate system shown. The vegetation unit boundaries were manually digitized. Data distributed as shapefile in Coordinate system EPSG:26919 - NAD83 / UTM zone 19N
Synthesis of Sea level rise and carbon accumulation rates in United States tidal wetlands
Coastal wetlands accumulate soil carbon more efficiently than terrestrial systems, but sea level rise potentially threatens the persistence of this prominent carbon sink. Here, we combine a published dataset of 372 soil carbon accumulation rates from across the United States with new analysis of 131 sites in coastal Louisiana. The combined database featured 503 measurements of carbon accumulation, spanning broad gradients in mean annual temperature, tide range, and dominant vegetation.
Figures 66–71. Stenotothorax schneppi, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)
Figures 66–71. Stenotothorax schneppi, n. sp. 66) Dorsal habitus. 67) Ventral habitus. 68) Lateral habitus. 69) Oblique anterior view head to elytral base. 70) Epipharynx. 71) Male genitalia, lateral view.
Figures 10–15. Stenotothorax spp. characters. 10–14 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)
Figures 10–15. Stenotothorax spp. characters. 10–14) Stenotothorax pronotal and elytral bases. 10) S. niviviator, complete pronotal marginal bead, rounded strial margin. 11) S. odontomonteus, reduced pronotal marginal bead, rounded strial margin (inset shows cross section of rounded margin). 12) S. lahontanensis, pronotal marginal bead absent, sharply edged strial margin. 13) S. winnemucca, pronotal marginal bead absent, sharply edged strial margin. 14) S. wintoni, pronotal marginal bead absent, sharply edged strial margin, note striae also wider towards base (inset shows cross section of sharp edge). 15) S. wintoni, fused elytra removed exposing strap-like hind wings.
Figures 1–9. Stenotothorax spp. characters. 1–2 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)
Figures 1–9. Stenotothorax spp. characters. 1–2) Extreme age-related wear on Stenotothorax spp.; note lack of clypeal teeth, smoothing and dulling of clypeal surface granulations, and reduction of protibiae. 1) S. wintoni. 2) S. schneppi. 3) Deformity on a S. woodleyi, note apparent tubercle is not centered on head. 4–9) Stenotothorax species heads. 4) S. niviviator. 5) S. odontomonteus. 6) S. nevadensis (Nevada, Washoe Co., Washoe Lake). 7) S. winnemucca. 8) S. lahontanensis, narrow head. 9) S. wintoni, broad head.
Figures 16–23 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)
Figures 16–23. Stenotothorax protibiae dorsal (top) and ventral (bottom) surfaces. Note abrasions on ventral surfaces. 16, 20) S. ovipennis, lacking secondary dorsal row of setae. 17, 21) S. wintoni, with secondary dorsal row of setae proximal of basal tooth. 18, 22) S. comosus, with coarse setose punctures on ventral surface, female with sparse setae on medial margin. 19, 23) S. winnemucca, with coarse setose punctures on ventral surface, male with denser setae on medial margin. Arrow points to secondary row of setae.
United Nations General Assembly Corpus
<p>United Nations General Assembly (UNGA) corpus preprared in the PolMine Project. The initial version of the dataset includes only sample data as a small subset. An Upcoming version will include a full corpus.</p>
Figure 29 in A remarkable new species of Himalusa Pace from Thailand (Coleoptera, Staphylinidae, Aleocharinae): phytophagous aleocharine beetle with potential for bio-control of skunkvine-related weeds in the United States
Figure 29. Himalusa thailandensis: a larva that emerged from a swollen petiole of Paederia sp. leaf.
Figure 4. Callytron monalisa. A in Increasing knowledge of the entomological fauna of the United Arab Emirates and the role of private collections
Figure 4. Callytron monalisa. A living specimen of Callytron monalisa, one of two specimens collected by B. Howarth in 2007 on Reem Island, Abu Dhabi. This rare species is known only from the Iranian side of the Arabian Gulf (photograph by D. Gardner).
Figure 2. The jewel beetle Pseudocastalia arabica. A in Increasing knowledge of the entomological fauna of the United Arab Emirates and the role of private collections
Figure 2. The jewel beetle Pseudocastalia arabica. A jewel beetle from the JAAENHG Insect Collection; this specimen was originally collected by J. N. B. Brown in Abu Dhabi and kept in the ENHG Collection there (photograph by B. Howarth).
Figure 3 in Increasing knowledge of the entomological fauna of the United Arab Emirates and the role of private collections
Figure 3. The flat-headed borer jewel beetle, Capnodis excisa. This specimen was collected by J. N. B. Brown in the Madam area, UAE; originally in the Abu Dhabi Collection, it is now housed in the JAAEN- HG Insect Collection in Al Ain (photograph by B. Howarth).
Figure 6 in Increasing knowledge of the entomological fauna of the United Arab Emirates and the role of private collections
Figure 6. An unidentified fly from the family Mydidae (photographed by D. Gardner). Whilst Mydidae had been observed in neighbouring Oman, before 2006 no records were known from the UAE.
Figure 1. All 4.683 in Mapping the terrestrial reptile distributions in Oman and the United Arab Emirates
Figure 1. All 4.683 records of terrestrial reptiles in Oman and the UAE. Although the coverage of records remains patchy, there are sufficient records to provide useful distribution information.
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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)
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.