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2,911 results for “dispersal”
Data from: Why is Amazonia a 'source' of biodiversity? climate-mediated dispersal and synchronous speciation across the Andes in an avian group (Tityrinae)
Amazonia is a 'source' of biodiversity for other Neotropical ecosystems, but which conditions trigger in situ speciation and emigration is contentious. Three hypotheses for how communities have assembled include (1) a stochastic model wherein chance dispersal events lead to gradual emigration and species accumulation, (2) diversity-dependence wherein successful dispersal events decline through time due to ecological limits, and (3) barrier displacement wherein environmental change facilitates dispersal to other biomes via transient habitat corridors. We sequenced thousands of molecular markers for the Neotropical Tityrinae (Aves) and applied a novel filtering protocol to identify loci with high utility for dated phylogenomics. We used these loci to estimate divergence times and model Tityrinae's evolutionary history. We detected a prominent role for speciation driven by barriers including synchronous speciation across the Andes, and found that dispersal increased toward the present. Because diversification was continuous but dispersal was non-random over time, we show that barrier displacement better explains Tityrinae's history than stochasticity or diversity-dependence. We propose that Amazonia is a source of biodiversity because (1) it is a relic of a biome that was once more extensive, (2) environmentally-mediated corridors facilitated emigration, and (3) constant diversification is attributed to a spatially heterogeneous landscape that is perpetually dynamic through time.
Data from: Do benefits of seed dispersal and caching by scatterhoarders outweigh the costs of predation? An example with oaks and yellow-necked mice
<p>Numerous interactions between plants and animals vary in their outcome between antagonism and mutualism. Interactions between plants and scatterhoarding animals provide a prime example of this phenomenon. Scatterhoarders consume large quantities of seeds (potentially reducing plant establishment), yet also disperse seeds and bury them in shallow caches (potentially improving recruitment). Despite intense work on mechanisms that cause these interactions to shift along an antagonism-mutualism continuum, it remains difficult to quantify their final outcomes.</p> <p>We demonstrate how readily available field data can be used to reach this goal, with interactions between rodents and two oaks species (sessile oak Quercus petraea, and red oak Q. rubra) as an empirical example. Our approach consists of quantifying the net outcome of the interaction through collecting data on different vital rates (e.g. probability that cached seeds survive to germination, probability of seedling recruitment with and without rodents; near and far from conspecific trees; with and without seed pilferage) and assembling them in a simple mathematical model.</p> <p>We found that during the period of the study, interactions between scatterhoarding rodents and both focal oaks were antagonistic. Even though caching increased the likelihood of seedling establishment, this effect was not strong enough to compensate for the costs of seed predation. Furthermore, there was no evidence that the short-distance transportation that is usually provided by small mammals benefited early oak recruitment.</p> <p>Synthesis. Our empirical results demonstrated that certain common assumptions -- that caching by rodents invariably benefits plant recruitment; that improved seedling establishment after seed burial is sufficient to make plant-scatterhoarder interactions mutualistic; that transportation away from maternal plants is highly beneficial -- do not always hold and should be tested rather than taken for granted.</p>
Investigating social and environmental predictors of natal dispersal in a cooperative breeding bird
<p class="MsoNoSpacing"><span>Natal dispersal is a crucial life history trait that affects both individual fitness and population structure, yet drivers of variation in dispersal probability and distance are difficult to study in wild populations. In cooperatively breeding species, individuals typically delay dispersal beyond their first breeding season and remain on the natal territory as nonbreeders, which prolongs social dynamics that can affect dispersal decisions. Using a 35-year data set covering almost 600 dispersal events in the cooperatively breeding Florida scrub-jay (<i>Aphelocoma coerulescens</i>), we examined the environmental and social parameters that predict dispersal probability over time and distance. In both sexes, dispersal probability increased with age, which in turn was negatively correlated with dispersal distance. In males, individuals occupying low quality natal territories and living with a stepfather had an increased probability of dispersal. Older and more dominant males were more likely to inherit their natal territory. In females, which generally disperse earlier and farther than males, socially subordinate jays dispersed farther than dominant ones. Overall, jays that delayed dispersal the longest were more likely to attain breeding status near their natal territory, which was previously found to be associated with increased survival and lifetime fitness. Our results suggest that social dynamics and environmental factors on the natal territory affect delayed dispersal patterns differently for the two sexes in this cooperative breeder.</span></p>
Patterns of pollen dispersal and mating in a population of the clonal plant Sagittaria latifolia
<p>1) Increased plant size is generally expected to have negative consequences for mating by increasing pollen transfer between flowers of the same plant. Such geitonogamous self-pollination would then reduce sexual fitness through both female and male function. However, recent theoretical work has indicated that when plants grow clonally, the outward expansion of plants caused by clonal growth might have positive effects on siring without substantially increasing rates of self-pollination.</p> <p>2) We investigated patterns of pollen dispersal, selfing, and siring in a monoecious population of the clonal plant <em>Sagittaria latifolia</em>, in which clones varied in size and the extent of intermingling with other clones. A spatially-explicit statistical model based on the inferred pollen-dispersal kernel was constructed to examine the mechanisms underlying observed mating patterns.</p> <p>3) Pollen dispersal typically occurred over distances that exceeded the spatial extent of clones. There was a positive association between clone size (measured as the number of ramets per genet) and the likelihood that clones were intermingled with the shoots of other clones. Together, these patterns of pollen dispersal and clonal intermingling resulted in a weak positive association between clone size and selfing rates and a strong positive association between clone size and outcross siring success. These patterns were replicated in the spatially-explicit model, indicating that the intermingling of clones is an important determinant of mating patterns in this population.</p> <p>4) Synthesis. Our study provides the first examination of the pollen dispersal kernel for a clonal plant. It is the first study providing empirical support for model predictions that potentially negative effects of increased selfing in large clones might be offset by increased siring success. This implies that the negative consequences of becoming large do not necessarily apply to clonal plants.</p>
Data from: Biogeographical evidence for common vicariance and rare dispersal in a southern Appalachian harvestman (Sabaconidae, Sabacon cavicolens)
Aim: Species or higher taxa that are obviously dispersal-limited, but which occupy large geographical distributions, represent a biogeographical paradox. Dispersal must have happened, likely under special and infrequent environmental conditions, but details have been lost to history. The overarching goal of our research is to understand the details of a 'common vicariance, rare dispersal' biogeographical history in a widespread but habitat-specialized harvestman species (Sabacon cavicolens) with a southern Appalachian centre of distribution. Location: Eastern North America, southern Appalachians. Methods: We assessed cryptic speciation using mitochondrial and nuclear gene DNA sequence data, testing alternative delimitation hypotheses using multispecies coalescent analyses. We also tested whether riverine barriers are associated with mitochondrial genealogical structuring, focusing on multiple rivers in the southern Blue Ridge physiographical province. Finally, we conducted population genetic analyses to assess female-based range expansion out of the southern Blue Ridge. Results: Genetic analyses suggest a large number of species-level lineages within S. cavicolens, although we prefer a more conservative three-species hypothesis. These putative species are geographically cohesive and allopatric (Ozarks, Cumberland Plateau, southern Blue Ridge), with the Blue Ridge species including multiple divergent mitochondrial haplogroups. Several genealogical breaks in the Blue Ridge species coincide with riverine barriers, separating mostly allopatric mitochondrial lineages. Contrasting with evidence for constrained gene flow and vicariance, two Blue Ridge haplogroups reveal extensive range expansion both northwards and westwards, resulting in the widespread distribution of closely related haplotypes, and occasional sympatry of dispersive haplotypes. Main Conclusions: Hidden beneath the apparently widespread distribution of a single species is a history of old vicariance separating geographically disjunct cryptic species. How these lineages came to occupy such disparate geographies is illustrated by dynamics within the Blue Ridge species, where both in situ vicariance and long-distance dispersal have shaped a 'common vicariance, rare dispersal' biogeographical history.
Integrated genome-wide investigations of the housefly, a global vector of diseases reveal unique dispersal patterns and bacterial communities across farms
<p><span><span><span><span><span><span><span><span><span><span><span><b>Background:</b>Houseflies (<i>Musca domestica</i>L.) live in intimate association with numerous microorganisms and is a vector of human pathogens. In temperate areas, houseflies will<span>overwinter in environments constructed by humans and recolonize surrounding areas in early summer. However, the </span>dispersal patterns and associated bacteria across season and location are unclear.We used genotyping-by-sequencing (GBS) for the simultaneous identification and genotyping of thousands of Single Nucleotide Polymorphisms (SNPs) to establish dispersal patterns of houseflies across farms. Secondly, we used16S rRNA gene amplicon sequencing to establish the variation and association between bacterial communities and the housefly across farms. </span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span><b>Results: </b>Using GBS we identified 18,000 SNPs across 400 individualssampled within and between 11 dairy farms in Denmark. There was evidence for sub-structuring of Danish housefly populations and with genetic structure that differed across season and sex. Further, there was a strong isolation by distance (IBD) effect, but with large variation suggesting that other hidden geographic barriers are important. Large individual variations were observed in the community structure of the microbiome and it was found to be dependent on location, sex, and collection time. Furthermore, the relative prevalence of putative pathogens was highly dependent on location and collection time.</span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span><b>Conclusion:</b>We were able to identify SNPs for the determination of the spatiotemporal housefly genetic structure, and to establish the variation and association between bacterial communities and the housefly across farms using novel <span>next</span><span>‐</span><span>generation sequencing (NGS)</span>techniques. These results are important for disease prevention given the fine-scale population structure and IBD for the housefly, and that individual houseflies carry location specific bacteria including putative pathogens. </span></span></span></span></span></span></span></span></span></span></span></p>
Plant dispersal syndromes are unreliable as predictors of zoochory and long-distance dispersal by ungulates and waterbirds
<p>Plant dispersal syndromes are allocated based on diaspore morphology and used to predict mechanisms of dispersal. Many authors assume that only angiosperms with endozoochory, epizoochory or anemochory syndromes have a long-distance dispersal (LDD) mechanism. Too much faith is often placed in classical syndromes to explain historical dispersal events and to predict future ones. The "endozoochory syndrome" is actually a "frugivory syndrome" and has often diverted attention from endozoochory by non-frugivores (e.g. waterbirds and large herbivores) that disperse a broad range of angiosperms, for which they likely provide the maximum dispersal distances. Neither the endozoochory nor the epizoochory syndromes provide helpful predictions of which plants non-frugivores disperse, or by which mechanism. We combined data from Albert et al. (2015a), Soons et al. (2016) and Julve (1998) to show that only 4% of European plant species dispersed by ungulate endozoochory belong to the corresponding syndrome, compared to 36% for ungulate epizoochory and 8% for endozoochory by migratory ducks. In contrast, the proportions of these species that are assigned to an "unassisted syndrome" are 37%, 31% and 28%, respectively. Since allocated syndromes do not adequately account for zoochory, empirical studies often fail to find the expected relationship between syndromes and LDD events such as those underlying the colonization of islands or latitudinal migration. We need full incorporation of existing zoochory data into dispersal databases, and more empirical research into the relationship between plant traits and the frequency and effectiveness of different dispersal mechanisms (paying attention to unexpected vectors). Acknowledging the broad role of non-frugivores in facilitating LDD is crucial to improve predictions of the consequences of global change, such as how plant distributions respond to climate change, and how alien plants spread. Networks of dispersal interactions between these vertebrates and plants are a vital but understudied part of the Web of Life. The datasets we present here illustrate these limitations of syndromes, and include data from Brochet et al. (2010) regarding the syndromes of plants dispersed by Eurasian Teal via epizoochory or endozoochory.</p>
Fine‐scale habitat heterogeneity and vole runways influence seed dispersal in Plagiobothrys nothofulvus
<p class="Normal1"><b>PREMISE:</b><i> </i>Seed dispersal allows plants to colonize new sites and contributes to gene flow among populations. Despite its fundamental importance to ecological and evolutionary processes, our understanding of seed dispersal is limited due to the difficulty of directly observing dispersal events. This is particularly true for the majority of plant species that are considered to have gravity as their primary dispersal mechanism. The potential for long-distance movement of gravity-dispersed seeds by secondary dispersal vectors is rarely evaluated. </p> <p class="Normal1"><b>METHODS: </b>We employ whole-genome assays of maternally inherited cpDNA in <i>Plagiobothrys nothofulvus</i> to resolve patterns of genetic variation due to effective (realized) seed dispersal within a 16 hectare prairie that is characterized by a mosaic of habitat types. We evaluate the effects of microgeographic landscape features extracted from micro-UAV aerial surveys on patterns of seed dispersal using landscape genetics methods.</p> <p class="Normal1"><b>RESULTS: </b>We found evidence of high resistance to seed-mediated gene flow (effective dispersal) within patches of <i>P. nothofulvus</i>, and strong genetic structure over distances of less than 20 meters. Geographic distance was a poor predictor of dispersal distance, while landscape features had stronger influences on patterns of dispersal<a name="_Hlk22028649"> (distance and direction of seed movement)</a>. Patterns of dispersal were best predicted by the combined distribution of flower patches, habitat type, and the network of vole runways, with the latter explaining the largest proportion of variation in the model.</p> <p class="Normal1"><b>CONCLUSIONS: </b>Our results suggest that primary dispersal occurs mostly within microhabitats and infrequent secondary dispersal may occur over longer distances due to the activity of small mammals and other vertebrates.</p>
Data from: Lowland tapirs facilitate seed dispersal in degraded Amazonian forests
The forests of southeastern Amazonia are highly threatened by disturbances such as fragmentation, understory fires and extreme climatic events. Large-bodied frugivores such as the lowland tapir (Tapirus terrestris) have the potential to offset this process, supporting natural forest regeneration by dispersing a variety of seeds over long distances to disturbed forests. However, we know little about their effectiveness as seed dispersers in degraded forest landscapes. Here, we investigate the seed dispersal function of lowland tapirs in Amazonian forests subject to a range of human (fire, fragmentation) and natural (extreme droughts, windstorms) disturbances, using a combination of field observations, camera traps, and Light Detection and Ranging (LiDAR) data. Tapirs travel and defecate more often in degraded forests, dispersing much more seeds in these areas [9,822 seeds per ha/yr (CI95% = 9,106; 11,838)] than in undisturbed forests [2,950 seeds per ha/yr (CI95% = 2,961; 3,771)]. By effectively dispersing seeds across disturbed forests, tapirs may contribute to natural forest regeneration – the cheapest and usually the most feasible way to achieve large-scale restoration of tropical forests. Through the dispersal of large-seeded species that eventually become large trees, such frugivores also contribute indirectly to maintaining forest carbon stocks. These functions may be critical in helping tropical countries to achieve their goals to maintain and restore biodiversity and its ecosystem services. Ultimately, preserving these animals along with their habitats may help in the process of natural recovery of degraded forests throughout the tropics.
The effects of temperature and dispersal on species diversity in natural microbial metacommunities
<p>Dispersal is key for maintaining biodiversity at local- and regional scales in metacommunities. However, little is known about the combined effects of dispersal and climate change on biodiversity. Theory predicts that alpha-diversity is maximized at intermediate dispersal rates, resulting in a hump-shaped diversity-dispersal relationship. This relationship is predicted to flatten when competition increases. We anticipate that this same flattening will occur with increased temperature because, in the rising part of the temperature performance curve, interspecific competition is predicted to increase. We explored this question using aquatic communities of <i>Sarracenia purpurea</i> from early- and late-successional stages, in which we simulated four levels of dispersal and four temperature scenarios. With increased dispersal, the hump shape was observed consistently in late successional communities, but only in higher temperature treatments in early succession. Increased temperature did not flatten the hump-shape relationship, but decreased the level of alpha- and gamma-diversity. Interestingly, higher temperatures negatively impacted small-bodied species. These metacommunity-level extinctions likely relaxed interspecific competition, which could explain the absence of flattening of the diversity-dispersal relationship. Our findings suggest that climate change will cause extinctions both at local- and global- scales and emphasize the importance of intermediate levels of dispersal as an insurance for local diversity.</p>
Data from: Dispersal enhances beta diversity in nectar microbes
Dispersal is considered a key driver of beta diversity, the variation in species composition among local communities, but empirical tests remain limited. We manipulated dispersal of nectar-inhabiting bacteria and yeasts via flower-visiting animals to examine how dispersal influenced microbial beta diversity among flowers. Contrary to the prevailing view that dispersal lowers beta diversity, we found beta diversity was highest when dispersal was least limited. Our analysis suggested that this unexpected pattern might have resulted from stronger priority effects under increased dispersal. Dispersal is highly stochastic, generating variability in species arrival history and consequently the potential for community divergence via priority effects, in these and likely many other microbial, plant, and animal communities. Yet most previous experiments eliminated this possibility. We suggest that the positive effects of dispersal on beta diversity, like the one we report here, may have been greatly underappreciated.
Frequency dispersion of small-amplitude capillary waves in viscous fluids (Supporting Data)
<p>This data accompanies the paper "Frequency dispersion of small-amplitude capillary waves in viscous fluids", published in Physical Review E.</p>
Dispersion and viscous attenuation of capillary waves with finite amplitude (Supporting data)
<p>This data accompanies the paper "Dispersion and viscous attenuation of capillary waves with finite amplitude", published in European Physical Journal Special Topics. The spreadsheet (in OpenOffice format) contains the raw data pertaining to the studied capillary waves.</p>
Data from: Limiting burrowing activity and overland dispersal of the invasive alien red swamp crayfish Procambarus clarkii by sophisticated design of watercourses
<p>Two datasets belonging to the paper "Limiting burrowing activity and overland dispersal of the invasive alien red swamp crayfish <i>Procambarus clarkii</i> by sophisticated design of watercourses" published in Ecological Engineering (https://doi.org/10.1016/j.ecoleng.2022.106787), are provided here. </p><p> </p><p>The first dataset "Burrow data from Limiting burrowing activity and overland dispersal P. clarkii.csv" contains data from an inventory of crayfish burrows in three watercourses in the municipality of Horssen (Province of Gelderland), the Netherlands. These data were collected during a lowering of the water level in these watercourses, which takes place annually in the winter period to prevent nuisance from excessively high phreatic groundwater in agricultural areas. The sites were located up to 5 km apart. On each bank, red swamp crayfish burrows with tunnel openings in banks below the shoreline were counted from the opposite bank of the watercourse using binoculars. This field survey was performed in March 2019 when the water level was lowered for the maintenance of the watercourses. The chance of overlooking burrows was very low as the vegetation cover was low in this period. Three sites with 'natural-like' banks (banks rehabilitated to a natural profile during rehabilitation projects, in the dataset referred to as 'natural' banks) were chosen in the area with a lowered water level and presence of red swamp crayfish. At site 1, 2 and 3, a total of 125, 46 and 18 bank transects respectively, each one 10 metres long, were surveyed. Banks were categorized as follows: (a) non-natural (steep, <i>viz</i>. > 40°, and barely vegetated; n = 77), (b) semi-natural (steep with some vegetation; n = 50), and (c) natural (gentle sloping, <i>viz</i>. < 25°, with a diverse, well-developed submerged and emergent vegetation; n = 62). See the paper for schematic cross-sections of three bank types.</p><p>The second dataset "Inclination experiment data from Limiting burrowing activity and overland dispersal P. clarkii.csv" contains data of an inclination experiment to relate frequencies of overland movement of the red swamp crayfish to several inclinations and substrate types. For this purpose, a wooden plate of 120 x 180 cm with a 10 cm thick layer of soil was used as a base on which three lanes of 40 cm wide and 180 cm long were constructed with one substrate type each: a) bare sandy soil, b), species-poor grassland with low (2-5 cm) vegetation and c) tall (40-50 cm) herbaceous-rich grassland. Inclinations applied for this experiment were 0°, 10°, 20° and 30°. Individuals were randomly selected for each treatment and placed in the middle of a lane and oriented perpendicular to the lane. After each trial, the crayfish was placed back in the water container and replaced by another crayfish. There was a minimum period of at least one hour between each trial for each crayfish. Each crayfish was used once for each substrate type and inclination test, and the treatment order was randomised for each animal. A crayfish was placed in the middle of the lane and could freely move around for a period of three minutes. Hereafter, by the change of its position on the lane after 3 minutes it was recorded whether an individual moved up (or left in case of 0°), down (or right in case of 0°), or did not move. In total, 273 trials were conducted. Trial numbers differ between treatments due to mortality of three animals during storage.</p><p> </p><p>Abstract</p><p> </p><p>Invasive alien crayfish species pose major ecological and hydrological risks globally. The red swamp crayfish (<i>Procambarus clarkii</i>) is one of the most widespread crayfish species worldwide. Its impacts arise from burrowing activities and lead to mobilization of soil nutrients, water safety risks by instability of dikes and erosion of banks. Increased sediment load demands additional dredging of drainage ditches and canals to ensure their water discharge capacity. Sustainable methods for limiting burrowing in banks and dispersal behaviour of crayfish were not yet available. Therefore, a field study was performed to determine whether the number of burrows and overland movement of crayfish were related to a particular bank type. Burrows were counted in three watercourses during a water-level decline. The number of burrows was significantly lower in natural banks than in non-natural and semi-natural banks. The construction of natural-like banks along watercourses may significantly reduce sediment load, erosion and the collapse of banks by burrowing activities of crayfish. An inclination experiment mimicking various types of terrestrial dispersal barriers elucidated that steepness, soil type and vegetation structure of small embankments near watercourses were significant factors for manipulating overland movement of crayfish. Crayfish were taken out of the water for this purpose and placed on small experimental embankments varying in slope and types of vegetation. The lowest frequencies of upward movement were recorded at inclinations of 20° and 30° on bare sandy soil and short and species-poor grassland substrates. This implies that crayfish crawling out of the water will return to the watercourse when encountering such a dispersal barrier. Therefore, a sophisticated design of embankments along watercourses can be a tool to reduce colonization risk of nearby located, hydrologically isolated water bodies with high nature values. </p>
Individual body mass and sex of a frugivorous bird affect the quality of seed dispersal
<p><span>Frugivorous animals play crucial roles dispersing seeds</span><span> away from parental plants and influencing plant recruitment. Most studies focus on comparisons of seed dispersal services provided by distinct species of animals, but neglect how within-species variation may affect dispersal. Individual traits, such as body mass and sex, are related to metabolic rates, gut load capacity, and transit times that potentially influence dispersal quantity and quality. Here, we aim to answer if individual traits (body mass and sex) of Pale-breasted Thrushes (<em>Turdus leucomelas</em>) affect seed dispersal quality by testing the following hypotheses (a) individual traits influence seed retention time and germination, (b) seed retention time affects seed germination and (c) seed passage through the gut enhances germination. We found that females retained seeds in the gut for longer periods than males. Gut-passed and manually depulped seeds had similar germination success. However, heavier birds, irrespective of sex, had longer seed retention times and promoted higher germination. Our results indicate that intraspecific differences in the morphological traits of frugivores are a source of variation in dispersal outputs and may help to explain complex patterns of seed dispersal. We highlight the importance of considering the quality of seed dispersal at an individual level, as well as at a species level, and reinforce that some individuals may contribute more to seed germination, and potentially recruitment, than others. Finally, a decrease in body masses of tropical birds in response to global warming may cascade to a decrease in seed dispersal quality. </span></p>
Statistical Analysis of Overlapping Double Ion Energy Dispersion Events in the Northern Cusp (Paper Data and Code)
<p>This data and code accompanies the paper <i>Statistical Analysis of Overlapping Double Ion Energy Dispersion Events in the Northern Cusp</i>, published in Frontiers in Astronomy and Space Sciences in 2023. This upload includes a CSV list of the selected events, a human-readable table of the selected events (see below), plots of each selected event, and the code used to select the events.</p><p>The code in this repository is a fork of <a href="https://github.com/ddasilva/dmsp-dispersion-detection">https://github.com/ddasilva/dmsp-dispersion-detection</a> at the time of publication. Future updates may exist on GitHub.</p><p><br> </p>
Fig. 5 in Comparative Biology Of Cave-Dwelling Spitting Spiders (Araneae: Scytodidae): Parental Care, Cooperative Prey-Capture, Cannibalism, Natal Dispersal And Reproductive Behaviour
Fig. 5. Scytodes fusca female leaving her egg-sac aside to forage on the house fly.
Supporting information for: Accounting for the topology of road networks to better explain human-mediated dispersal in terrestrial landscapes
<p><span>Human trade and movements are central to biological invasions worldwide. Human activities not only transport species across biogeographical barriers but also accelerate their post-introduction spread in the landscape. Thus, by constraining human movements, the spatial structure of road networks might greatly affect the regional spread of invasive species. However, few invasion models have accounted for the topology of road networks so far, and its importance for explaining the regional distribution of invasive species remains mostly unexplored.</span><span> To address this issue, we developed a spatially explicit and mechanistic human-mediated dispersal model that accounts and tests for the influence of transport networks on the regional spread of invasive species. Using as a model the spread of the invasive ant <em>Lasius</em> <em>neglectus</em> in the middle Rhône valley (France), we show that accounting for the topology of road networks improves our ability to explain the current distribution of the invasive ant. In contrast, we found that using human population density as a proxy for the frequency of transport events decreases models' performance and might thus not be as appropriate as previously thought. Finally, by differentiating road networks into sub-networks, we show that national and regional roads are more important than smaller roads for explaining spread patterns. Overall, our results demonstrate that the topology of transport networks can strongly bias regional invasion patterns and highlight the importance of better incorporating it into future invasion models. The mechanistic modelling approach developed in this study should help invasion scientists explore how human-mediated dispersal and topography shape invasion dynamics in landscapes. Ultimately, our approach could be combined with demographic, natural dispersal and environmental suitability models to refine spread scenarios and improve invasive species monitoring and management at regional to national scales.</span></p>
Underlying dataset Bertolini and Pastres Understanding the influence of swarming timing on the dispersal of Ostrea edulis larvae in the Northern Adriatic Sea
<p>Output from opendrift simulations (final larval positions) </p>
Cryptic Magma Chamber in the Deccan Traps imaged using receiver functions and Surface wave dispersion
<p>This is a Dataset for the article titled "Cryptic Magma Chamber in the Deccan Traps imaged using receiver functions and Surface wave dispersion" by Saha et. al. (2023). For more information about the data, contact <a href="mailto:kumarsahagokul123@gmail.com">kumarsahagokul123@gmail.com.</a></p>
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.