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29 results for “insect dispersal”
Alien insect dispersal mediated by the global movement of commodities
<p>Globalization and economic growth are recognized as key drivers of biological invasions. Alien species have become a feature of almost every biological community worldwide, and rates of new introductions continue to rise as the movement of people and goods accelerates. Insects are among the most numerous and problematic alien organisms, and are mainly introduced unintentionally with imported cargo or arriving passengers. However, the processes occurring prior to insect introductions remain poorly understood. We used a unique dataset of 1,902,392 border interception records from inspections at air, land and maritime ports in Australia, New Zealand, Europe, Japan, the United States of America and Canada to identify key commodities associated with insect movement through trade and travel. A total of 8,939 species were intercepted, and commodity association data were available for 1,242 species recorded between 1960 and 2019. We used rarefaction and extrapolation methods to estimate the total species richness and diversity associated with different commodity types. Plant and wood products were the main commodities associated with insect movement across cargo, passenger baggage and international mail. Furthermore, certain species were mainly associated with specific commodities within these, and other broad categories. More closely related species tended to share similar commodity associations, but this occurred largely at the genus level rather than within orders or families. These similarities within genera can potentially inform pathway management of new alien species. Combining interception records across regions provides a unique window into the unintentional movement of insects, and provides valuable information on establishment risks associated with different commodity types and pathways.</p>
FIG. 2. A in Zoochorous dispersal of freshwater peaclams (Bivalvia: Sphaeriidae): potential role of aquatic insects
FIG. 2. A. Dorsal and ventral views of the Aeshna juncea (Linnaeus, 1758) dragonfly nymph (Omolon River basin, Magadan Oblast, Russia). B. Euglesa globularis attached to the leg of the Common Hawker dragonfly nymph. C. Dorsal, ventral, and lateral views of the Callicorixa sp. nymph (a small unnamed lakelet near Orotukan settlement, Magadan Oblast, Russia). D. Euglesa parvula attached to the leg of the water boatmen nymph. Scale bars: (A, C) – 1 mm; (B, D) – 0.5 mm. Photos by Aksenova O.V.
РИС. 1. Карта района исследований в бассейне реки Колыма (МагаданскаЯ область, РоссиЯ) (1) оЗеро рЯдом с поселком Оротукан; (2) ОЗеро Лебединое рЯдом с селом Омолон. Фотографии Аксёновой О.В. (1) и Соколовой С.Е. (2). in Zoochorous dispersal of freshwater peaclams (Bivalvia: Sphaeriidae): potential role of aquatic insects
РИС. 1. Карта района исследований в бассейне реки Колыма (МагаданскаЯ область, РоссиЯ) (1) оЗеро рЯдом с поселком Оротукан; (2) ОЗеро Лебединое рЯдом с селом Омолон. Фотографии Аксёновой О.В. (1) и Соколовой С.Е. (2).
Data from: Host plant phenology drives risky larval dispersal in an outbreaking insect defoliator
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Alien insect dispersal mediated by the global movement of commodities
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Pathways for accidental biocontrol: the human-mediated dispersal of insect predators and parasitoids
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Data for: Stronger niche than dispersal effects on α- and β-diversity of stream algae, insects, and fish across latitudes in the US
<p><strong>Aim: </strong>Niche and dispersal processes influence biodiversity, but their relative importance along latitude is unclear. We predicted that: i) niche processes would dominate at high latitudes due to increased climatic stress, consistent with the physiological tolerance hypothesis and the Dobzhansky-MacArthur hypothesis and ii) dispersal limitation would prevail at low latitudes due to narrower niches and smaller range sizes, as postulated by the dispersal-ecological specialization tradeoff hypothesis, the latitude-niche breadth hypothesis, and Rapoport's rule. </p> <p><strong>Location:</strong> Central United States</p> <p><strong>Time Period: </strong>1993-2019</p> <p><strong>Major taxa studied:</strong> Stream algae, insects, and fish</p> <p><strong>Methods:</strong> We examined the relative effects of environment (climate and physicochemistry) vs. space on stream biodiversity in seven latitudinal zones, spanning 19 latitudinal degrees. In each zone, species richness (α-diversity) was analyzed with multiple regression and variance partitioning. Compositional dissimilarity (β-diversity) within zones was assessed with distance-based RDA and variance partitioning.</p> <p><strong>Results:</strong> For α-diversity, latitudinal variability of niche and dispersal processes conformed to our predictions in all three groups, except for dispersal processes in insects. However, the drivers of β-diversity did not follow our predictions. The latitude-niche breadth hypothesis and Rapoport's rule were weakly supported only in fish.</p> <p><strong>Main Conclusions:</strong> The importance of niche and dispersal processes varied predictably along the latitudinal gradient only for α-diversity. However, the niche effects were driven mostly by physicochemistry, and the dispersal effects were not always linked with ecological specialization and range size. This suggests that climate-based biodiversity theories do not have particular relevance for the streams in our study. Niche processes had a greater impact than dispersal processes across species groups and diversity metrics, emphasizing the primary role of the environment.</p>
The spatial extent and the dispersal strategy of species shape the occupancy frequency distribution of stream insect assemblages
<p>This is the datasets and R script for our manuscript titled "The spatial extent and the dispersal strategy of species shape the occupancy frequency distribution of stream insect assemblages."</p> <p><strong><em>Study area and sampling of Mecsek_species_Szivaketal.xlsx data</em></strong></p> <p>The study area is situated in the Mecsek Mountains in Hungary. Stream insects were collected using the kick and sweep sampling technique. A hand net with a frame width of 25 cm and a mesh size of 1000 µm was employed. The collection involved disturbing an area of 0.25 × 0.25 m. We employed a stratified random multihabitat sampling procedure. We collected 20 sample units from the major microhabitats in proportion to their occurrence within the reaches. Each sample unit was individually processed and sorted in the laboratory to ensure thorough and accurate analysis.</p> <p><strong>Disperse_trait_Szivaketal.xlsx </strong>data is based on DISPERSE database (Sarremejane et al., 2020)</p> <p>Methods for <strong>microhabitat_coverage_reach_transect.xlsx:</strong> Prior to sampling, we divided each 100 m long reach into 20 transects of comparable length and created microhabitat coverage maps. Using these maps, we assessed the proportionate coverage of different microhabitat types within each reach</p> <p>References:</p> <p>Sarremejane, R., Cid, N., Stubbington, R., Datry, T., Alp, M., Cañedo-Argüelles, M., Cordero-Rivera, A., Csabai, Z., Gutiérrez-Cánovas, C., Heino, J., Forcellini, M., Millán, A., Paillex, A., Pařil, P., Polášek, M., Tierno de Figueroa, J. M., Usseglio-Polatera, P., Zamora-Muñoz, C., & Bonada, N. (2020). DISPERSE, a trait database to assess the dispersal potential of European aquatic macroinvertebrates. <em>Scientific Data</em>,<em> 7(1), </em>386. https://doi.org/10.1038/s41597-020-00732-7</p>
Phenotypic plasticity, heritability, and genotype-by-environment interactions in an insect dispersal polymorphism
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Data for: Stronger niche than dispersal effects on α- and β-diversity of stream algae, insects, and fish across latitudes in the US
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Data from: Dispersal-fecundity trade-offs in wild insect populations
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Data from: Dispersal ability and habitat requirements determine landscape-level genetic patterns in desert aquatic insects
Species occupying the same geographic range can exhibit remarkably different population structures across the landscape, ranging from highly diversified to panmictic. Given limitations on collecting population-level data for large numbers of species, ecologists seek to identify proximate organismal traits—such as dispersal ability, habitat preference and life history—that are strong predictors of realized population structure. We examined how dispersal ability and habitat structure affect the regional balance of gene flow and genetic drift within three aquatic insects that represent the range of dispersal abilities and habitat requirements observed in desert stream insect communities. For each species, we tested for linear relationships between genetic distances and geographic distances using Euclidean and landscape-based metrics of resistance. We found that the moderate-disperser Mesocapnia arizonensis (Plecoptera: Capniidae) has a strong isolation-by-distance pattern, suggesting migration–drift equilibrium. By contrast, population structure in the flightless Abedus herberti (Hemiptera: Belostomatidae) is influenced by genetic drift, while gene flow is the dominant force in the strong-flying Boreonectes aequinoctialis (Coleoptera: Dytiscidae). The best-fitting landscape model for M. arizonensis was based on Euclidean distance. Analyses also identified a strong spatial scale-dependence, where landscape genetic methods only performed well for species that were intermediate in dispersal ability. Our results highlight the fact that when either gene flow or genetic drift dominates in shaping population structure, no detectable relationship between genetic and geographic distances is expected at certain spatial scales. This study provides insight into how gene flow and drift interact at the regional scale for these insects as well as the organisms that share similar habitats and dispersal abilities.
Data from: The interactive effects of competition and predation risk on dispersal in an insect.
Dispersal dynamics have significant consequences for ecological and evolutionary processes. Previous work has demonstrated that dispersal can be context-dependent. However, factors affecting dispersal are typically considered in isolation, despite the probability that individuals make dispersal decisions in response to multiple, possibly interacting factors. We examined whether two ecological factors, predation risk and intraspecific competition, have interactive effects on dispersal dynamics. We performed a factorial experiment in mesocosms using backswimmers (Notonecta undulata), flight-capable, semi-aquatic insects. Emigration rates increased with density, and increased with predation risk at intermediate densities; however, predation had minimal effects on emigration at high and low densities. Our results indicate that factorial experiments may be required to understand dispersal dynamics under realistic ecological conditions.
Border Interceptions Reveal Novel Bridgehead Effects on Global Dispersal of Insects
<p>Supplemental data - including raw and processed data from intercepting agencies, native range information and code for the analysis of the final data. </p>
Linked networks reveal dual roles of insect dispersal and species sorting for bacterial communities in flowers
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Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs?
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Data from: Sex-biased dispersal is independent of sex ratio in a semiaquatic insect
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Data from: Dispersal ability and habitat requirements determine landscape-level genetic patterns in desert aquatic insects
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Data from: The interactive effects of competition and predation risk on dispersal in an insect.
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Data from: Life-stage differences in spatial genetic structure in an irruptive forest insect: implications for dispersal and spatial synchrony
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Allen Brain Atlas
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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.