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5,108 results for “North America”
Figures 29–32. Cybocephalus acicultatus Champion. 29 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 29–32. Cybocephalus acicultatus Champion. 29) Antenna. 30) Proleg. 31) Mesoleg. 32) Metaleg.
Figures 64–70. Cybocephalus edmondsoni T. R. Smith. 64 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 64–70. Cybocephalus edmondsoni T. R. Smith. 64) Antenna. 65) Proleg. 66) Mesoleg. 67) Metaleg. 68) Median lobe. 69) Median lobe, lateral view. 70) Basal plate.
Figures 54–63. Cybocephalus championi T. R. Smith. 54 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 54–63. Cybocephalus championi T. R. Smith. 54) Antenna. 55) Proleg. 56) Mesoleg. 57) Metaleg. 58) Median lobe, variant. 59) Median lobe, variant. 60) Median lobe, lateral view, variant. 61) Median lobe, lateral view, variant. 62) Basal plate, variant. 63) Basal plate, variant.
Figures 153–160 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 153–160. Pycnocephalus deyrollei (Reitter). 153) Antenna. 154) Proleg. 155) Mesoleg. 156) Metaleg. 157) Median lobe. 158) Median lobe, lateral view. 159) Basal plate, variant. 160) Basal plate, variant.
Figures 112–119 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 112–119. Cybocephalus nipponicus Endrödy-Younga. 112) Antenna. 113) Proleg. 114) Mesoleg. 115) Metaleg. 116) Median lobe. 117) Median lobe, lateral view. 118) Basal plate. 119) Metanotum.
Figures 161–168. Pycnocephalus metallicus Sharp. 161 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 161–168. Pycnocephalus metallicus Sharp. 161) Antenna. 162) Proleg. 163) Mesoleg. 164) Metaleg. 165) Median lobe. 166) Median lobe, lateral view. 167) Basal plate, variant. 168) Basal plate, variant.
Figures 101–111. Cybocephalus nigritulus LeConte. 101 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 101–111. Cybocephalus nigritulus LeConte. 101) Antenna. 102) Proleg. 103) Mesoleg. 104) Metaleg. 105) Median lobe, variant. 106) Median lobe, variant. 107) Median lobe, lateral view, variant. 108) Median lobe, lateral view, variant. 109) Basal plate, variant. 110) Basal plate, variant. 111) Metanotum.
Figures 37–40. Cybocephalus beverlyae T. R. Smith. 37 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 37–40. Cybocephalus beverlyae T. R. Smith. 37) Antenna. 38) Median lobe. 39) Median lobe, lateral view. 40) Basal plate.
Figures 131–134. Cybocephalus schwarzi Champion. 131 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 131–134. Cybocephalus schwarzi Champion. 131) Antenna. 132) Median lobe. 133) Median lobe, lateral view. 134) Basal plate.
Figures 135–143. Cybocephalus skelleyi T. R. Smith. 135 in Review of the Cybocephalidae (Coleoptera) of North America and the West Indies with descriptions of two new species of Cybocephalus Erichson
Figures 135–143. Cybocephalus skelleyi T. R. Smith. 135) Antenna. 136) Proleg. 137) Mesoleg. 138) Metaleg. 139) Median lobe, as it appears in holotype. 140) Median lobe, lateral view, as it appears in the holotype. 141) Basal plate. 142) Median lobe, hypothetical reconstruction. 143) Median lobe, lateral view, hypothetical reconstruction.
Figure 3. Lasioglossum semicaeruleum. a in Lasioglossum (Dialictus) semicaeruleum (Cockerell, 1895) (Hymenoptera: Halictidae) in Maryland: A disjunct population in eastern North America?
Figure 3. Lasioglossum semicaeruleum. a) Head, frontal view. b) Habitus, lateral view. c). Habitus, dorsal view. d) Metapostnotum, showing distinctive strongly anastomosing rugae (Gibbs 2010). USGS_DRO141684, female, Wittman, Talbot County, Maryland, 1–4 September 2007, collected by Warren E. Steiner, Jr. and Jil M. Swearingen. Photographed by Samuel W. Droege.
Figure 1 in Lasioglossum (Dialictus) semicaeruleum (Cockerell, 1895) (Hymenoptera: Halictidae) in Maryland: A disjunct population in eastern North America?
Figure 1. North American states (United States and Mexico) and provinces (Canada) with known specimen records of Lasioglossum semicaeruleum (Gibbs 2010; Ascher and Pickering 2022; GBIF 2022). Created with SimpleMappr (Shorthouse 2010).
Figure 2 in Lasioglossum (Dialictus) semicaeruleum (Cockerell, 1895) (Hymenoptera: Halictidae) in Maryland: A disjunct population in eastern North America?
Figure 2. Maryland specimen records of Lasioglossum semicaeruleum. Left to right: USGS_DRO029678 (Bowie, Prince George's County), USGS_DRO556278 (Poplar Island, Talbot County), and USGS_DRO141684 (Wittman, Talbot County). Created with SimpleMappr (Shorthouse 2010).
Data for: Off-host survival of blacklegged ticks in eastern North America: A multi-stage, multi-year, and multi-site study
<p>Climatic conditions are widely thought to govern the distribution and abundance of ectoparasites, such as the blacklegged tick (<em>Ixodes scapularis</em>), vector of the agents of Lyme disease and other emerging human pathogens. However, translating physiological tolerances to distributional limits or mortality is challenging. Ticks may be able to avoid or tolerate unsuitable conditions, and what is lethal to one life history stage may not extend to others. Thus, even after decades of research there are clear gaps in our knowledge about how climatic conditions determine tick distributions or patterns of abundance. We present the results of a comprehensive, three-year study of the influence of local temperatures and vapor pressure deficits on the survival of each free-living, off-host stage of <em>I. scapularis</em> in semi-natural enclosures across three locations that span their current distribution in eastern North America. We found that only larvae are clearly sensitive to direct mortality from climatic conditions, specifically desiccating conditions, whereas mortality of nymphs and adults appears to stem from exhausted energy reserves. We also found strong evidence that key developmental transitions in the tick's life cycle—fed larvae molting into to nymphs, fed nymphs molting into adults, and fed females producing larvae (via egg masses)—were all strongly temperature-dependent, though temperatures were not limiting in any of our sites. Collectively, our results suggest that climate is likely to impact <em>I. scapularis</em> largely through its impact on the larval stage.</p>
GlobBiomass dataset of forest biomass, North America N (25 m)
<p>The dataset consists of a map of above ground forest biomass (AGB, unit: tons/ha i.e., Mg/ha) of the North American region between 50°N and 90°N for the year 2010 (raster dataset) with a pixel size of 25 m x 25 m. AGB is defined as the mass, expressed as oven-dry weight of the woody parts (stem, bark, branches and twigs) of all living trees excluding stump and roots. Per-pixel estimates of above-ground biomass uncertainty expressed as standard error in Mg/ha (raster dataset) are also provided. </p> <p>The AGB estimates were obtained from spaceborne SAR (ALOS PALSAR, Envisat ASAR), optical (Landsat-7), LiDAR (ICESAT), auxiliary datasets with multiple estimation procedures (Santoro et al., ESSD, 2021). </p> <p>In this repository, the AGB data are available in form of tiles of 2° x 2° (bounding box: longitude -180°E/-26°E latitude: 50°N/+90°N).</p> <p>This dataset is the basis for the official GlobBiomass dataset consisting of global estimates of forest biomass with 1 ha pixels (<a href="https://doi.pangaea.de/10.1594/PANGAEA.894711">https://doi.pangaea.de/10.1594/PANGAEA.894711</a>). The dataset in this repository represents the original GlobBiomass dataset of AGB from which the official dataset was obtained after averaging from 25 m to 100 m. Given the lower accuracy of the 25 m pixel-based estimates, it is recommended to use the official GlobBiomass dataset unless detailed spatial resolution is a fundamental asset. </p> <p>Technical specifications are provided in the file README_GLOBBIOMASS_North_America_N_20210428.pdf</p>
GlobBiomass dataset of forest biomass, North America S (25 m)
<p>The dataset consists of a map of above ground forest biomass (AGB, unit: tons/ha i.e., Mg/ha) of the North American region between 24°N and 50°N for the year 2010 (raster dataset) with a pixel size of 25 m x 25 m. AGB is defined as the mass, expressed as oven-dry weight of the woody parts (stem, bark, branches and twigs) of all living trees excluding stump and roots. Per-pixel estimates of above-ground biomass uncertainty expressed as standard error in Mg/ha (raster dataset) are also provided. </p> <p>The AGB estimates were obtained from spaceborne SAR (ALOS PALSAR, Envisat ASAR), optical (Landsat-7), LiDAR (ICESAT), auxiliary datasets with multiple estimation procedures (Santoro et al., ESSD, 2021). </p> <p>In this repository, the AGB data are available in form of tiles of 2° x 2° (bounding box: longitude -180°E/-26°E latitude: 24°N/+54°N).</p> <p>This dataset is the basis for the official GlobBiomass dataset consisting of global estimates of forest biomass with 1 ha pixels (<a href="https://doi.pangaea.de/10.1594/PANGAEA.894711">https://doi.pangaea.de/10.1594/PANGAEA.894711</a>). The dataset in this repository represents the original GlobBiomass dataset of AGB from which the official dataset was obtained after averaging from 25 m to 100 m. Given the lower accuracy of the 25 m pixel-based estimates, it is recommended to use the official GlobBiomass dataset unless detailed spatial resolution is a fundamental asset. </p> <p>Technical specifications are provided in the file README_GLOBBIOMASS_North_America_S_20210428.pdf</p>
Bacidia fuscoviridis, another overlooked sorediate crustose lichen widely distributed in temperate eastern North America
<p>To evaluate the generic relationships of <em>Bacidia fuscovirdis </em>within Ramalinaceae we carried out BLASTn searches of the existing reference sequences of <em>B. fuscoviridis</em> in NCBI which recovered representatives of <em>Biatora </em>Ach., <em>Lecania </em>A.Massal. and <em>Mycobilimbia</em> Rhem, as the closest hits for ITS and the lone sequence of rpb2. Based on these results we used the published phylogeny of Ramalinaceae from Kistenich et al. (2018) as a guide and constructed a multi-locus dataset that mirrored their sampling of the clade containing <em>Bilimbia</em>, <em>Lecania</em> and <em>Mycobilimbia</em> with <em>Biatora</em> as an outgroup. We downloaded the mtSSU, ITS, nucLSU and RPB2 sequences used by those authors (see Table 1) and manually aligned each dataset in Mesquite 3.31 (Maddison & Maddison 2017. We then added the available reference sequences of<em> B. fuscoviridis </em>(three ITS sequences, one rpb2 sequence) to the relevant alignment, manually adjusted them, and defined all ambiguously aligned regions and gap-rich terminal regions in an exclusion set. The excluded regions were then manually deleted, terminal gaps transformed to missing data, and uncertainties and polymorphisms transformed to missing data. The alignments were then concatenated in Mesquite and exported a single PHYLIP file. The concatenated alignment was partitioned and RAxML v8.2x (Stamatakis 2006) was used to infer a maximum likelihood (ML) topology and bootstrapping was performed with 500 pseudoreplicates and implementing the model GTRGAMMA across all partitions. The results were visualized in FigTree 1.4.3 (Rambaut 2016).</p> <p>This data deposit includes the underlying files for the phylogeny presented in the published study (Curtis et al., Journal of the Torrey Botanical Society). It includes a translation table for GenBank accessions and terminal names used in the dataset, individual alignments for ITS, mtSSU, nucLSU and rpb2 all in NEXUS format, concatenated alignment in NEXUS and PHYLIP format as well as partitions file for RAxML, and the final tree figure presented in the publication.</p>
(Dataset) Evaluating tomotectonic plate reconstructions using geodynamic models with data assimilation, the case for North America
<p>Dataset for the paper:</p> <p>Evaluating tomotectonic plate reconstructions using geodynamic models with data assimilation, the case for North America</p> <p>For more infomation, please look into the README file or contact ljliu@illinois.edu, thank you!</p>
Data from: Recent decreases in snow water storage in western North America
<p>We present long-term average and annual Snow Storage Index values over mountainous western North America, intended to represent the snow water storage capacity (and associated change) across the region. The Snow Storage Index represents the temporal phase difference between daily precipitation and surface water inputs – the sum of rainfall and snowmelt into the terrestrial systems – weighted by relative magnitudes. Different from snow water equivalent or snow fraction, the Snow Storage Index represents the degree to which the snowpack delays the timing and magnitude of surface water inputs relative to preciptiation, a fundamental component of how snow water storage influences the hydrologic cycle. Our analysis of a 64-year modeled dataset and 34-year observation dataset shows that the Snow Storage Index has decreased significantly across mountainous, western North America, due primarily to substantially earlier snowmelt and rainfall in spring months, with additional declines in winter precipitation. The Snow Storage Index and associated trends offer a new perspective on hydrologic sensitivity to climate change which have broad implications for water resources and ecosystems.</p>
Figure 4 in Identification of Chironomus (Chironomus) melanescens Keyl, 1962 in North America
Figure 4. Polytene chromosomes of C. melanescens. Chromosome arms on Keyl (1962) system (A-G); nucleolus (N); Balbiani rings (BR).
ScienceDex guides
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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.