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4,010 results for “Stability”
Figure 11 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 11. Sequential (1-2) views of encounter between the two male forms of Maevia inclemens. Apart from a brief defensive reaction by the grey male (2), no ritual combat ensued and the males did not appear to recognize that they were conspecific.
Figure 9 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 9. Five sequential matings (1-2, 3, 4, 5-6, 7) of the two male forms with the same female Maevia inclemens over the course of five days. 1-2, This mating was interrupted as the male switched from one side to the other, but after an atypical low crawl display with legs I extended, the tufted male quickly recaptured the female and continued to mate on the other side. 5-6, mating on the right and then left sides. Note the many erect spines on the legs of the mating male in each instance.
Figure 10 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 10. Attempted mating by the grey male Maevia inclemens. This sequence shows how the male jumped the female while she was suspended from her dragline, just after capturing a fly (1), and attempted to mate with her (2). The female promptly released her prey, and the male then fed on it for many minutes (3-4), still in a suspended position [23 JUNE 2020 14:09- 14:13]. Three days later this male approached and mated successfully with the female for a second time (Figures 5:1-7, 9:7).
Figure 7 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 7. Sequential positions (1-10) of the tufted male Maevia inclemens as he advanced toward the female in a later mating attempt (after Figure 6).
Figure 3 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 3. Adult male Maevia inclemens, tufted (black) form. The tufts of the dorsal carapace may not be present in all males of this form. Note the lack of stripes on the uniformly-colored legs. 2, Feeding on mosquito (Diptera: Culicidae).
Figure 6 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 6. Sequential positions (1-4) of the tufted male Maevia inclemens as he advanced toward the female. Facing the female, this male maintained an elevated position with the opisthosoma turned down, stepping and waving both legs I and pedipalps. As with the grey male (Figure 5), this male also mated sucessfully with the female (Figure 9:3), jumping and capturing her after advancing to a near position.
Figure 5 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 5. Display by grey males, Maevia inclemens. 1-7, Successive (low crawl) positions of the grey male male from Massachusetts, advancing to successfully mate with the female. When close, this male jumped and captured the female (Figure 9:7). 8, Display by a grey male from Sherburne County, Minnesota, recorded in 1982.
Figure 2 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 2. Adult male Maevia inclemens, grey (striped) form. Note the stripes on the prolateral surface of each femur.
Figure 1. Adult female Maevia inclemens. 1-2, 6 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 1. Adult female Maevia inclemens. 1-2, 6, Feeding on a small fly (Diptera: Brachycera). 3-4, Feeding on a small robber fly (Diptera: Ascilidae). With the exception of Figure 5:8, only three M. inclemens individuals, two males and one female, all photographed on plants in the laboratory, are shown in this paper. All were collected in Massachusetts, June 2020.
Figure 4 in Stabilizing selection to maintain the two male forms of the jumping spider Maevia inclemens (Araneae: Salticidae: Marpissina), version 2
Figure 4. Four sequential positions of a male (1-4) during the successful courtship of a female Paraphidippus aurantius (Lucas 1833) on a plant in the laboratory. Males were placed on plants with three recently molted females, all from Greenville County, South Carolina. In each case the female stopped moving soon after she sighted the male, and the male advanced to mate successfully when she did not turn to face him as he stepped from side to side. In this example the female stopped moving at a distance of about 10 cm from the approaching male. The subsequent mating included insertion of each pedipalp on the respective side of the epigynum, and occupied more than 20 minutes. P. aurantius males will cohabit with and defend penultimate females (Thurlow 2016), and their large chelicerae are associated with the ritual male-male combat (agonistic behavior) that may ensue. This represents a pattern seen in many other salticids (e.g., Lyssomanes viridis, Tedore & Johnsen 2012, 2013, 2015), in which male-male contests account for most sexual selection. At the other end of the spectrum of sexual selection lie the highly ornamented salticids of the genus Maratus, for which male-male contests are virtually unknown (save one species), and a female may examine the details of male ornamentation up-close before acceptance (Otto & Hill 2021). Most salticids appear to fall somewhere between these two extremes, relying to some extent on both male-male combat and active selection by females.
Mineral Protection rather than Aggregate Stability Enhanced Soil Organic Carbon Along an Elevated Gradient in Alpine Areas of Southwest China
<p>This data contains Background, Dominant plant and their biomass, Environmental variables, Aggregate stability, Fe/Al oxides, Mass of soil density fractions, Carbon contetn in each density fraction, Mass of aggregates, Carbon content in each aggregate class size, Ratio of carbon content in each soil density and aggregate fractions and Enzyme avtivity of our investigated sites. Total 46 factors were given.</p>
Data from: Lizard richness in mainland China is more strongly correlated with energy and climatic stability than with diversification rates
<p><strong><span>Aim</span></strong><span>: Contemporary environmental, historical, and evolutionary factors are increasingly used to decipher the drivers of spatial patterns of species richness. Evidence of such correlations for Chinese reptiles is scarce and poorly understood. We therefore explored the validity of the environmental capacity, historical climatic stability, and diversification rates hypotheses on Chinese lizard richness.</span></p> <p><span><strong>Location</strong>:</span><span> Mainland China</span></p> <p><span><strong>Taxon</strong>:</span><span> Squamata: Sauria</span></p> <p><strong><span>Methods</span></strong><span>: We mapped the distribution ranges of all 237 lizards in mainland China using a combination of different datasets. We used current environmental conditions (ambient energy, environmental productivity, and habitat heterogeneity), historical climate stability indices (long-term: since ~3.3 Ma and short-term: since the Last Glacial Maximum), and mean tip diversification rates to test whether current environmental conditions, historical climate change, and diversification rates drive contemporary richness patterns of lizards in China. We applied piecewise structural equation models (pSEM) to jointly evaluate our hypotheses, considering direct and indirect effects.</span></p> <p><strong><span>Results</span></strong><span>: Chinese lizards showed latitudinal diversity gradients. We found consistent support for contemporary climatic and environmental factors' relationships with richness. Richness was also positively correlated with short-term climatic stability, but less so with long-term stability. Diversification rates were only seldom found to be positively correlated with lizard richness.</span></p> <p><span><strong>Main conclusions</strong>:</span><span> Our results support the</span> <span>environmental capacity and historical climate hypotheses, which link high richness to highly productive warm and stable regions (and low richness to cold and unstable regions). We conclude that post-speciation dispersal and short-term climatic oscillations quickly swamp the long-term signal of diversification rates and climatic fluctuations, creating strong current climate-richness associations.</span></p>
GEOLAB - Transnational Access project HSRTSUB - Resilient behaviour of stabilized and conventional high-speed's rail track subgrades under different drainage conditions and seat loads
<p>In this study, the shear strength of track ballast material is evaluated by testing different types of track ballast specimens, which was conducted in a Large-scale Triaxial Apparatus at ZAG ) that has a shear area of 40 cm x 40 cm and can accommodate specimens up to 80 cm high. It enable loading of specimens in simple shear mode.</p> <p>The tests, which were conducted within HSRTSUB project, include two different types of ballast, the fouled ballast samples and the clean ballast samples, and two different specimen preparation techniques (with and without compaction). The normal stresses used cover a wide range from 50 to 400 kPa.</p> <p>The European standard EN13450 "Aggregates for railway ballast" was used. This standard specifies the properties of aggregates obtained by processing natural, manufactured or recycled crushed unbound aggregates for use in the construction of the upper layer of railway track. For the purposes of this standard, the aggregate is referred to as track ballast.</p> <p>Tests were conducted under unsaturated conditions with two types of lightweight materials:</p> <p>- fouled ballast aggregates and</p> <p>- clean ballast aggregates</p>
Stability of the next-to-tribimaximal mixings under radiative corrections with the variation of SUSY breaking scale in MSSM
<pre>We analyse the radiative stability of the next-to-tribimaximal mixings ($NTBM$) with the variation of SUSY breaking scale ($m_S$) in MSSM, for both normal ordering (NO) and inverted ordering (IO) at the fixed input value of seesaw scale $M_R = 10^{15}$ GeV and two different values of $\tan \beta$. All the neutrino oscillation parameters receive varying radiative corrections irrespective of the $m_S$ values at the electroweak scale, which are all within $3\sigma$ range of the latest global fit data at low value of $\tan \beta$ (30). NO is found to be more stable than IO for all four different NTBM mixing patterns.</pre>
Dataset for: Asymmetric response of aboveground and belowground temporal stability to nitrogen and phosphorus addition in a Tibetan alpine grassland
<p><span>Anthropogenic eutrophication is known to impair the stability of aboveground net primary productivity (ANPP), but its effects on the stability of belowground (BNPP) and total (TNPP) net primary productivity remain poorly understood. Based on a nitrogen and phosphorus addition experiment in a Tibetan alpine grassland, we show that nitrogen addition had little impact on the </span><span>temporal stability</span><span> of ANPP, BNPP and TNPP, whereas phosphorus addition reduced the </span><span>temporal stability</span><span> of BNPP and TNPP, </span><span>but not ANPP</span><span>. Significant interactive effects of nitrogen and phosphorus addition were observed on the stability of ANPP because of the opposite phosphorus effects under </span><span>ambient and enriched nitrogen conditions</span><span>. We found that the stability of TNPP was primarily driven by that of BNPP rather than that of ANPP. The responses of BNPP stability cannot be predicted by those of ANPP stability, as the variations in responses of ANPP and BNPP to enriched nutrients, with ANPP increased while BNPP remained unaffected, resulted in asymmetric responses in their stability. The dynamics of grasses, the most abundant plant functional group, instead of community species diversity, largely contributed to the ANPP stability. </span><span>Under the enriched nutrient condition, the synchronization of grasses reduced the grass stability, while the latter had a significant but weak negative impact on the BNPP stability. </span><span>These findings challenge the prevalent view that species diversity regulates the responses of ecosystem stability to nutrient enrichment. Our findings also suggest that the ecological consequences of nutrient enrichment on ecosystem stability cannot be accurately predicted from the responses of aboveground components, and highlight the need for a better understanding of the belowground ecosystem dynamics.</span></p>
Understanding Activity-Stability Tradeoffs in Biocatalysts by Enzyme Proximity Sequencing
<p>Data and scripts of the manuscript "<strong>Understanding Activity-Stability Tradeoffs in Biocatalysts by Enzyme Proximity Sequencing</strong>" by Rosario Vanella, Christoph Küng, Alexandre A. Schoepfer, Vanni Doffini, Jin Ren and Michael A. Nash.</p>
Dynamic social interactions and keystone species shape the diversity and stability of mixed-species biofilms – an example from dairy isolates - Dataset
<p>We previously reported a bacterial four-species biofilm model comprising <i>Stenotrophomonas rhizophila </i>(SR), <i>Bacillus licheniformis </i>(BL), <i>Microbacterium lacticum </i>(ML), and <i>Calidifontibacter indicus</i> (CI) that were isolated from the surface of a dairy pasteuriser after cleaning and disinfection. These bacteria produced 3.13-fold more biofilm mass compared to the sum of biofilm masses in monoculture (<a href="https://doi.org/10.3389/fmicb.2023.1159434">https://doi.org/10.3389/fmicb.2023.1159434</a>). In a subsequent experiment we confirmed that the observed community synergy resulted from dynamic social interactions among various species pairs, encompassing commensalism, exploitation, and amensalism. <i>M. lacticum</i> appeared to be the keystone species as it increased the growth of all other species that led to the synergy in biofilm mass. Interactions among the other three species (in the absence of <i>M. lacticum</i>) also contributed towards the synergy in biofilm mass. Bacterial cell-free-supernatants were also investigated to assess the nature of the observed synergy. The first four sheets of the Excel file contain raw cell count data for the four species (SR, BL, ML, and CI), recorded every 4 h over a 24 h period on the surface of stainless steel (SS) in the presence of brain-heart-infusion (BHI) medium and skim-milk (SM). Data related to individual bacterial cell counts in various mixed-species biofilms are also presented. These biofilms were developed on SS in BHI for h. Data related to bacterial biofilm masses in different mixed-species biofilm combinations are also presented, showcasing the effect of replacing one strain with its CFS. Species written in red indicate that their CFS was used, not their viable form. </p>
Source data: Negative Membrane potential accelerates sugar uptake by stabilizing the outward-facing conformation of the Na+/glucose symporter vSGLT
<p><strong>Galactose uptake source data.</strong></p><p>Excel file (annotated and color coded).</p><p> </p><p><strong>Double electron-electron resonance (DEER) source data.</strong></p><p>File name indicates Figure number, construct and conditions.<br>First column: Time in microseconds.<br>Second Column: Magnitude dipolar evolution data (phase corrected and normalized).</p><p> </p><p>Information for associated MD simulations under <a href="http://dx.doi.org/10.5281/zenodo.10000256">10.5281/zenodo.10000256.</a></p><p> </p>
Stability Measurement of a 340 nm UV Source at the Optical Laboratory of BFKH.
<p>Dataset archive of the stability Measurement of a 340 nm UV Source at the Optical Laboratory of BFKH.</p><p>The project 19ENV02 RemoteALPHA has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. - https://remotealpha.drmr.nipne.ro/</p>
Stability of C3 and C4 grass patches after fire and simulated grazing
<p class="MsoNormal"><span>As the woody legume, </span><em>Prosopis glandulosa</em><span> (honey mesquite) has encroached into grasslands and rangelands in the southern Great Plains, USA, two grass species, C<sub>4</sub> shortgrass, </span><em>Buchloe dactyloides</em><span> (buffalograss), and C<sub>3</sub> mid-grass, </span><em>Nassella leucotricha</em><span> (Texas wintergrass), have increased in dominance. Occurrence of more productive C<sub>4</sub> mid-grasses and herbaceous diversity have declined. We measured effects of various combinations of spring clipping (to simulate cattle grazing) and summer and/or winter fire treatments on the stability of monoculture patches of these two grass species over an eight-year period, with the goal of reducing </span><em>Nassella</em><span> and increasing C<sub>4</sub> mid-grass cover. All fire treatments top-killed most </span><em>Prosopi</em><span><em><span>s</span></em> trees that subsequently resprouted. </span><em>Buchloe</em><span> cover declined in the No Clip + No Fire treatment but remained intact</span> with clipping and/or fire. Frequent clip<span>ping reduced </span><em>Nassella</em><span> cover across all fire treatments. </span><em>Buchloe </em><span>encroachment into </span><em>Nassella</em><span> patches was greatest in the Clip + Alternate Season fire treatment. C<sub>4</sub> mid-grass cover increased to 15–25% in </span><em>Nassella</em><span> patches in several fire-only or Clip + Fire treatments; greatest gains were observed in treatments that included summer fire. In contrast, C<sub>4</sub> mid-grass gains were lower in </span><em>Buchloe </em><span>patches. These results suggest that C<sub>4</sub> mid-grass restoration was linked with treatments that reduced</span><em> Nassella </em><span>cover.</span></p>
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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.