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1,037 results for “Canadensys”
Kellogg Biological Station site, station Kellogg Biological Station, study of aboveground net primary productivity of Lactuca canadensis in units of gramsPerMeterSquaredPerYear on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Kellogg Biological Station (KBS) contains aboveground net primary productivity of Lactuca canadensis measurements in gramsPerMeterSquaredPerYear units and were aggregated to a yearly timescale.
Kellogg Biological Station site, station Kellogg Biological Station, study of aboveground net primary productivity of Solidago canadensis in units of gramsPerMeterSquaredPerYear on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Kellogg Biological Station (KBS) contains aboveground net primary productivity of Solidago canadensis measurements in gramsPerMeterSquaredPerYear units and were aggregated to a yearly timescale.
Data from: Characterizing population and individual migration patterns among native and restored bighorn sheep (Ovis canadensis)
Migration evolved as a behavior to enhance fitness through exploiting spatially and temporally variable resources and avoiding predation or other threats. Globally, landscape alterations have resulted in declines to migratory populations across taxa. Given the long time periods over which migrations evolved in native systems, it is unlikely restored populations embody the same migratory complexity that existed before population reductions or regional extirpation. 2. We used GPS location data collected from 209 female bighorn sheep (Ovis canadensis) to characterize population and individual migration patterns along elevational and geographic continuums for 18 populations of bighorn sheep with different management histories (i.e., restored, augmented, and native) across the western United States. 3. Individuals with resident behaviors were present in all management histories. Elevational migrations were the most common population-level migratory behavior. There were notable differences in the degree of individual variation within a population across the three management histories. Relative to native populations, restored and augmented populations had less variation among individuals with respect to elevational and geographic migration distances. Differences in migratory behavior were most pronounced for geographic distances, where the majority of native populations had a range of variation that was 2 to 4 times greater than restored or augmented populations. 4. Synthesis and applications. Migrations within native populations include a variety of patterns that translocation efforts have not been able to fully recreate within restored and augmented populations. Theoretical and empirical research has highlighted the benefits of migratory diversity in promoting resilience and population stability. Limited migratory diversity may serve as an additional factor limiting demographic performance and range expansion. We suggest preserving native systems with intact migratory portfolios and a more nuanced approach to restoration and augmentation in which source populations are identified based on a suite of criteria that includes matching migratory patterns of source populations with local landscape attributes.
Data from: Drought affects the coordination of belowground and aboveground resource-related traits in Solidago canadensis in China
Quantifying patterns of variation and coordination of plant functional traits can help to understand the mechanisms underlying both invasiveness and adaptation of plants. Little is known about the coordinated variations of performance and functional traits of different organs in invasive plants, especially in response to their adaptation to environmental stressors. To identify the responses of the invasive species Solidago canadensis to drought, 180 individuals were randomly collected from 15 populations and 212 ramets were replanted in a greenhouse to investigate both the response and coordination between root and leaf functional traits. Drought significantly decreased plant growth and most of the root and leaf functional traits, i.e. root length, surface area, volume and leaf size, number, and mass fraction, except for the root length ratio and root mass fraction. Phenotypic plasticity was higher in root traits than in leaf traits in response to drought, and populations did not differ significantly. The plasticity of most root functional traits, i.e., root length (RL), root surface area (RSA), root volume (RV), and root mass fraction (RMF), were significantly positively correlated with biomass between control and drought. However, the opposite was found for leaf functional traits, i.e. specific leaf area (SLA), leaf area ratio (LAR), and leaf mass fraction (LMF). Drought enhanced the relationship between root and leaf, i.e., 26 pairwise root-leaf traits were significantly correlated under drought, while only 15 pairwise root-leaf traits were significantly correlated under control conditions. Significant correlations were found between biomass and all measured functional traits except for leaf size. RV, root length ratio, RMF, total area of leaves, and LMF responded differently to water availability. These responses enable S. canadensis to cope with drought conditions and may help to explain the reason of the vast ecological amplitude of this species.
No evidence for early fitness penalty in glyphosate-resistant biotypes of Conyza canadensis: common garden experiments in the absence of glyphosate
<p>Strong selection from herbicides has led to the rapid evolution of herbicide-resistant weeds, greatly complicating weed management efforts worldwide. In particular, overreliance on glyphosate, the active ingredient in RoundUp®, has spurred the evolution of resistance to this herbicide in ≥40 species. Previously, we reported that <i>Conyza canadensis</i> (horseweed) has evolved extreme resistance to glyphosate, surviving at 40x the original 1x effective dosage. Here, we tested for underlying fitness effects of glyphosate resistance to better understand whether resistance could persist indefinitely in this self-pollinating, annual weed. We sampled seeds from a single maternal plant ("biotype") at each of 26 horseweed populations in Iowa, representing 9 susceptible biotypes (S), 8 with low-level resistance (LR), and 9 with extreme resistance (ER). In 2016 and 2017, we compared early growth rates and bolting dates of these biotypes in common garden experiments at two sites near Ames, Iowa. Nested ANOVAs showed that, as a group, ER biotypes attained similar or larger rosette size after 6 weeks compared to S or LR biotypes, which were similar to each other in size. Also, ER biotypes bolted 1-2 weeks earlier than S or LR biotypes. These fitness-related traits also varied among biotypes within the same resistance category, and time to bolting was inversely correlated with rosette size across all biotypes. Disease symptoms affected 40% of all plants in 2016 and 78% in 2017, so we did not attempt to measure lifetime fecundity. In both years, the frequency of disease symptoms was greatest in S biotypes and similar in LR vs. ER biotypes. Overall, our findings indicate there is no early growth penalty and possibly no lifetime fitness penalty associated with glyphosate resistance, including extremely strong resistance. We conclude that glyphosate resistance is likely to persist in horseweed populations, with or without continued selection pressure from exposure to glyphosate.</p>
FIGURE 32 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 32. Tetranychus canadensis, larva, A, prodorsum; B, posterior dorsum; C, posterior venter. Scale bar 20 μm.
FIGURE 28 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 28. Tetranychus canadensis, protonymph, palp and rostrum, front view, arrow a, divided line of tibial claw, arrow b, spur on tibial claw, arrow c, rostral fossette. Scale bar 5 μm.
FIGURE 33 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 33. Tetranychus canadensis, larva, A, peritreme with tracheae; B, tarsus, ventral view; C, palp femur to tarsus.
FIGURE 29 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 29. Tetranychus canadensis, protonymph, palp femur to tarsus; B, peritreme. Scale bars 20 μm.
FIGURE 24 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 24. Tetranychus canadensis, deutonymph, A and B, peritreme; C, palp, lateral view; D, palp tibia-tarsus, ventral view.
FIGURE 23 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 23. Tetranychus canadensis, deutonymph, posterior venter, A and B, showing the pregenital striae.
FIGURE 9 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 9. Tetranychus canadensis, female, A, distal tarsus I, arrow a, spur on claw, arrow b, dorsal spur on empodium; B, distal tarsus II, arrow c, spur on empodium; C, distal tarsus III, arrow d, dorsal spur on empodium; D, distal tarsus IV, arrow e, dorsal spur on empodium. Scale bar 10 μm.
FIGURE 20 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 20. Tetranychus canadensis, male, aedeagi, A, type, ex. apple, Malus pumila, Ontario, Canada; B, ex. apple, Malus pumila, New York, U.S.A.; C, ex. Ulmus americana, New York, U.S.A; D, ex. Ulmus americana, Ohio, U.S.A; E, ex. Elmus sp. New York, U.S.A; F-G, ex. Maryland, U.S.A.; H-I, from unknown plant and location.
FIGURE 17 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 17. Tetranychus canadensis, male, A, leg I, duplex setae; B, base of trichobothridial seta (db) on tarsus I; C, base of normal tactile seta (d) on genu I. Scale bars, A 50 μm, B and C 2 μm.
FIGURE 6 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 6. Tetranychus canadensis, female, genital region. A, type specimens, ex. apple, Malus pumila, Ontario, Canada; B, ex. apple, Malus pumila, New York, U.S.A.; C & D, ex. Liriodendron tulipifera, Maryland, U.S.A.; E, ex. Ulmus sp. Washington D.C., U.S.A.; F, Ulmus sp. New York, U.S.A. Scale bar 20 μm.
FIGURE 3 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 3. Tetranychus canadensis, female, opisthosoma, showing the variation of striae between e1-f2. Scale bar 20 μm.
FIGURE 8 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 8. Tetranychus canadensis, female, A, gnathosoma, dorsal view; B, palp tibia-tarsus, ventral view; C and D, peritreme.
FIGURE 16 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 16. Tetranychus canadensis, male, A, peritreme; B, palp tibia-tarsus, ventral view; C, palp, lateral view.
FIGURE 19 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 19. Tetranychus canadensis, male, aedeagi, A, type, ex. apple, Malus pumila, Ontario, Canada; B, ex. apple, Malus pumila, New York, U.S.A.; C and D ex. Liriodendron tulipifera, Maryland, U.S.A.; E, Ulmus sp. Maryland, U.S.A.
FIGURE 21 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 21. Tetranychus canadensis, male, A, aedeagus with ejaculatory duct and seminal vesicle; B, aedeagus; C, ejaculatory duct and seminal vesicle. Scale bars, A, B and C 6 μm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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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.