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11,506 results for “Dynamics”
Dynamic Changes of Chlorophyll a and Nutrients in Different Water Layers Under Typhoon Influence
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Morphology, dynamic disorder, and charge transport in an indoloindole-based hole-transporting material from a multi-level theoretical approach
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Structural Dynamics and Tunability for Colloidal Tin Halide Perovskite Nanostructures
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In silico molecular docking and molecular dynamic simulation of agarwood compounds with molecular targets of Alzheimer's disease
<p>We added Supplementary Figure 8a.</p>
Data for manuscript 'Spatial Characteristics and Dynamic Mechanisms of the Antarctic Slope Current in the Ross Sea'
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Pedagogical innovation: dynamics of E-learning in the teaching of accounting sciences based on a bibliometric analysis.
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Chapter 3 - A highly-dynamic East Antarctic Ice Sheet during the Miocene: A multi-proxy sedimentary provenance approach using in-situ 87Rb/87Sr dating of detrital K-feldspar in ODP Site 1165, Prydz Bay
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A dynamic optimization of soil phosphorus status approach could reduce phosphorus fertilizer use by half in China
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Ultrafast Charge Dynamics in Nitrogen-Rich Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis
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r.avaflow Package for a dynamic earth flow model
<p>Software and start script for reproducing the r.avaflow simulations in the publication "A dynamic earth flow model" by Shiva P. Pudasaini and Martin Mergili</p>
Dl_Dynamical_code
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Variation in prey availability over time shaped the extinction dynamics of sabertoothed cats
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Mismatches between birds' spatial and temporal dynamics reflect their delayed response to global changes
<p>Global changes alter the dynamics of biodiversity, and are forecasted to continue or worsen in the decades to come. Modelling approaches used to anticipate these impacts are mainly based on the equivalence between spatial and temporal response to environmental forcings, generally called space-for-time substitution. However, several processes are known to generate deviations between spatial and temporal responses, potentially undermining the prediction based on space-for-time substitution.</p> <p>We here used high-resolution data from the french breeding bird survey to quantify and map the deviation between spatial and temporal patterns of bird abundances resulting from the dynamics of 124 species monitored in 2133 sites between 2001 and 2012. Using independent empirical data, we then tested specific predictions linked to the determinants (anthropogenic activities) and processes (lagged responses to environmental changes) potentially generating these deviations. We found that deviations between spatial and temporal patterns of abundances were particularly structured in space for bird communities. Following our predictions, these space–time deviations were positively correlated with the human influence on ecosystems, and linked with colonization–extinction ratios and community completeness, two markers of ongoing delayed responses to environmental changes. Our results suggest that the deviations between spatial and temporal patterns are related to recent anthropogenic environmental changes and disequilibrium responses to these changes. Investigating deviations between spatial and temporal patterns of biodiversity might open promising perspectives for a formal quantification of disequilibrium state of biodiversity at large spatial scale.</p>
The dynamical formation of ephemeral groups on networks and their effects on epidemics spreading
<p>Dataset for the paper "The dynamical formation of ephemeral groups on networks and their effects on epidemics spreading "</p> <p>- NullModels_NoOverlap.xlsx : Index of data files and summary of results for the Null Model and No Overlap Analyses</p> <p>- EphemeralGroups.xlsx: Index of data files and summary of results of a selection of tested configurations for #G=(1,10,100,1000). The corresponding zip files contain the data files for each #G</p>
Figure 2 in Occupation dynamics and nesting behaviours of Xylocopa frontalis (Olivier) (Hymenoptera: Apidae) in artificial shelters
Figure 2. Histogram of the permanence time of Xylocopa frontalis females in the bee shelters.
Effect of mutation supply on population dynamics and trait evolution in experimental microbial community
<p>Mutation supply can influence eco-evolutionary dynamics in important ways which have received little attention. Mutation supply determines key features of population genetics, such as the pool of adaptive mutations, evolutionary pathways available, and importance of processes such as clonal interference. The resultant trait evolutionary dynamics, in turn, can alter population size and species interactions. However, controlled experiments testing for the importance of mutation supply on rapid adaptation and thereby population and community dynamics are lacking. To close this knowledge gap, we performed a serial passage experiment with wild-type Pseudomonas fluorescens and an isogenic xerD mutant with reduced mutation rate. Bacteria were grown at two resource levels in combination with the presence of a ciliate predator. We found that a higher mutation supply enabled faster adaptation to the low-resource environment and anti-predatory defense. This was associated with higher population size at the ecological level and better access to high-recurrence mutational targets at the genomic level for the strain with higher mutation supply. In contrast, mutation rate did not affect growth under high-resource level, possibly because of more permissive conditions or high population size saturated in mutations. Our results demonstrate that intrinsic mutation rate influences population dynamics and trait evolution particularly when population size is constrained by extrinsic conditions.</p>
Data from: Strong interactive effects of warming and insect herbivory on soil carbon and nitrogen dynamics at Subarctic tree line
<p>Warming will likely stimulate Arctic primary production, but also soil C and N mineralization, and it remains uncertain whether the Arctic will become a sink or a source for CO<sub>2</sub>. Increasing insect herbivory may also dampen the positive response of plant production and soil C input to warming. We conducted an open-air warming experiment with Subarctic field layer vegetation in North Finland to explore the effects of warming (+3°C) and reduced insect herbivory (67% reduction in leaf damage using an insecticide) on soil C and N dynamics. We found that plant root growth, soil C and N concentrations, microbial biomass C, microbial activity, and soil NH<sub>4</sub><sup>+</sup> availability were increased by both warming and reduced herbivory when applied alone, but not when combined. Soil NO<sub>3</sub><sup>-</sup> availability increased by warming only and in-situ soil respiration by reduced herbivory only. Our results suggest that increasing C input from vegetation under climate warming increases soil C concentration, but also stimulates soil C turnover. On the other hand, it appears that insect herbivores can significantly reduce plant growth. If their abundance increases with warming as predicted, they may curtail the positive effect of warming on soil C concentration. Moreover, our results suggest that temperature and herbivory effects on root growth and soil variables interact strongly, which probably arises from a combination of N demand increasing under lower herbivory and soil mineral N supply increasing under higher temperature. This may further complicate the effects of rising temperatures on Subarctic soil C dynamics.</p>
Spatiotemporal dynamics of PIEZO1 localization controls keratinocyte migration during wound healing
<p>Keratinocytes, the predominant cell type of the epidermis, migrate to reinstate the epithelial barrier during wound healing. Mechanical cues are known to regulate keratinocyte re-epithelization and wound healing however, the underlying molecular transducers and biophysical mechanisms remain elusive. Here, we show through molecular, cellular and organismal studies that the mechanically-activated ion channel PIEZO1 regulates keratinocyte migration and wound healing. Epidermal-specific Piezo1 knockout mice exhibited faster wound closure while gain-of-function mice displayed slower wound closure compared to littermate controls. By imaging the spatiotemporal localization dynamics of endogenous PIEZO1 channels we find that channel enrichment at some regions of the wound edge induces a localized cellular retraction that slows keratinocyte collective migration. In migrating single keratinocytes, PIEZO1 is enriched at the rear of the cell, where maximal retraction occurs, and we find that chemical activation of PIEZO1 enhances retraction during single as well as collective migration. Our findings uncover novel molecular mechanisms underlying single and collective keratinocyte migration that may suggest a potential pharmacological target for wound treatment. More broadly, we show that nanoscale spatiotemporal dynamics of Piezo1 channels can control tissue-scale events, a finding with implications beyond wound healing to processes as diverse as development, homeostasis, disease and repair.</p>
Wild reindeer, wolf and moose population dynamics in Eastern Finland
<p><i>Background.</i> The alternative prey hypothesis describes the mechanism for apparent competition whereby the mortality of the secondary prey species increases (and population size decreases) by the increased predation by the shared predator if the population size of the primary prey decreases. Apparent competition is a process where the abundance of two co-existing prey species are negatively associated because they share a mutual predator, which negatively affects the abundance of both prey. Here, we examined whether alternative prey and/or apparent competition hypothesis can explain the population dynamics and reproductive output of the secondary prey, wild forest reindeer (<i>Rangifer tarandus fennicus</i>) in Finland, in a predator-prey community in which moose (<i>Alces alces</i>) is the primary prey and the wolf (<i>Canis lupus</i>) is the generalist predator.</p> <p><i>Methods.</i> We examined a 22-year time series (1996 - 2017) to determine how the population size and the calf/female ratio of wild forest reindeer in Eastern Finland were related to the abundances of wolf and moose. Only moose population size was regulated by hunting. Summer predation of wolves on reindeer focuses on calves. We used least squares regression (GLS) models (for handling autocorrelated error structures and resulting pseudo-R<sup>2</sup>s) and generalized linear mixed (GLMs) models (for avoidance of negative predictions) to determine the relationships between abundances. We performed linear and general linear models for the calf/female ratio of reindeer.</p> <p><i>Results and Synthesis</i>. The trends in reindeer population size and moose abundance were almost identical: an increase during the first years and then a decrease until the last years of our study period. Wolf population size in turn did not show long-term trends. Change in reindeer population size between consecutive winters was related positively to the calf/female ratio. The calf/female ratio was negatively related to wolf population size, but the reindeer population size was related to the wolf population only when moose abundance was entered as another independent variable. The wolf population was not related to moose abundance even though it is likely to consist the majority of the prey biomass. Because reindeer and moose populations were positively associated, our results seemed to support the alternative prey hypothesis more than the apparent competition hypothesis. However, these two hypotheses are not mutually exclusive and the primary mechanism is difficult to distinguish as the system is heavily managed by moose hunting. The recovery of wild forest reindeer in eastern Finland probably requires ecosystem management involving both habitat restoration and control of species abundances.</p>
Data Set of From Monolith to Microservices: Static and Dynamic Analysis Comparison
<p>Contains the JSON files with the collected data and the results of the study done.</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.