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145 results for “non-native species”
Diet overlap among non-native trout species and native Cutthroat Trout (Oncorhynchus clarkii) in two U.S. ecoregions
<p>The invasion of freshwater ecosystems by non-native species can constitute a significant threat to native species and ecosystem health. Non-native trouts have long been stocked in areas where native trouts occur and have negatively impacted native trouts through predation, competition, and hybridization. This study encompassed two seasons of sampling efforts across two ecoregions of the western United States: The Great Basin in summer 2016 and the Yellowstone River Basin in summer 2017. We found significant dietary overlaps among native and non-native trouts within the Great Basin and Yellowstone River Basin ecoregions. Three orders of invertebrates (Ephemeroptera, Trichoptera and Diptera) composed the majority of stomach contents and were responsible for driving the observed patterns. Great Basin trout had higher body conditions (k) and non-native Great Basin trout had higher gut fullness values than Yellowstone River Basin trout, indicating a possible limitation of food in the Yellowstone River Basin. Native fishes were the least abundant and had the lowest body condition in each ecoregion. These findings may indicate a negative impact on native trouts by non-native trouts. We recommend additional monitoring of native and non-native trout diets, regular invertebrate surveys to identify the availability of diet items, and reconsidering stocking efforts that can result in overlap of non-native fishes with native cutthroat trout.</p>
Spillover of chalkbrood fungi to native solitary bee species from non-native congeners
<p>Introduced, managed bees such as mason bees (genus <em>Osmia</em>) can confer significant pollination benefits to agricultural systems, but a risk of introducing non-native species into new ecosystems is the co-introduction of pathogens along with them. Pathogen spillover to wild, native bees may then drive native bee species declines.</p> <p>This study examined prevalence of the chalkbrood-causing fungal genus <em>Ascosphaera</em> in the nests of both non-native and native mason bee species. We conducted large-scale trap-nesting and pan-trapping efforts across the Mid-Atlantic United States with community scientists. Using molecular methods, nests were screened for all known <em>Ascosphaera</em> species in which genetic sequences have been published. After finding <em>Ascosphaera</em> species first described in Asia, we compared their local prevalence with the local abundance of mason bees from Asia. Lastly, we compared the prevalence of co-introduced Ascosphaera species across sites with a variety of landcover profiles.</p> <p>Results indicate species originally described in Japan, <em>Ascosphaera naganensis</em> and <em>Ascosphaera fusiformis</em>, are now present in native Virginia mason bees, <em>Osmia lignaria</em> and <em>Osmia georgica</em>, with high prevalence of <em>A. naganensis</em> found in <em>O. georgica</em>.</p> <p>We also found that the declining native mason bee <em>O. georgica</em> experienced higher prevalence of non-native <em>Ascosphaera</em> spp. at sites with larger numbers of non-native <em>O. cornifrons</em> and <em>O. taurus</em>, perhaps indicating greater likelihood of spillover of these <em>Ascosphaera</em> species with greater sources of transmission. Lastly, when the proportion of agricultural landcover surrounding bee nests was high, there was significantly greater prevalence of non-native <em>Ascosphaera</em> in <em>O. georgica</em> compared to more natural landcover types.</p> <p>Synthesis and applications. Through community science programming, we documented species of Japanese chalkbrood fungi inside native mason bee nests in North America. Native mason bees encounter non-native fungi more frequently with increasing abundance of non-native mason bees. Agricultural landscapes may exacerbate spillover of non-native fungi for native mason bees. The use of non-native bee species in agriculture should involve monitoring native bees for pathogens in the surrounding area for detection of spillover and species declines.</p>
Data and Code supplement to: Effects of intraspecific variation in a native species´ phenology on its coexistence with non-native plants
<p>Data and code to generate the results of the paper published at Oikos "Effects of intraspecific variation in a native species´ phenology on its coexistence with non-native plants". </p> <p>Both R files can be independently run, and datasets include the raw data to generate the interaction coefficients according Lasthenia phenology or simulations to investigate the effect of intraspecific trait variation of Lasthenia population abundances. </p>
Data from: Non-native species affect the long-term dynamics of native stream fish assemblages
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Data from: Non-native species spread in a complex network: the interaction of global transport and local population dynamics determines invasion success
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Fluctuations in resource availability shape the competitive balance among non-native plant species
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Diet overlap among non-native trout species and native Cutthroat Trout (Oncorhynchus clarkii) in two U.S. ecoregions
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Data from: Phenology in a warming world: differences between native and non-native plant species
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Diversity, species coexistence, and functional composition patterns in subtropical Atlantic Forests invaded by non-native trees
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Data from: Emerging risks of non-native species escapes from aquaculture: call for policy improvements in China and other developing countries
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Spillover of chalkbrood fungi to native solitary bee species from non-native congeners
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Data from: Warming had contrasting effects on the importance of facilitative interactions with a cushion nurse species on native and non-native species in the high-Andes of central Chile
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Non-native species drive biotic homogenization, but it depends on the realm, beta diversity facet and study design: A meta-analytic systematic review
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Data from: Sensitivity to AMF species is greater in late-successional than early-successional native or non-native grassland plants
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Beetle diversity in dead wood is lower in non-native than native tree species, especially those more distantly related to native species
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Socio-economic status and non-native species drive bird ecosystem service provision in urban areas
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Population structure and genetic variance among local populations of an non-native earthworm species in Minnesota, USA
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New non-native pseudocryptic Cyclorhipidion species (Coleoptera: Curculionidae: Scolytinae: Xyleborini) found in the United States as revealed in a multigene phylogeny
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Seasonal variation in impact of non-native species on tropical seed dispersal networks
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Multiple spatial scales affect direct and indirect interactions between a non-native and a native species
Plant–plant interactions influence community assembly and species responses to environmental change. However, species interactions are complex phenomena influenced by context and scale. We conducted a one-year replacement experiment between two grasses in subtropical grasslands (native Axonopus fissifolius and non-native Paspalum notatum) in central Florida, USA. We evaluated interactions between these species at three ecological scales, ‘pairwise interactions’, ‘patch’ (33 cm x 33 cm) and ‘plot’ (1m x 3m), and along a gradient (15 levels) of increasing non-native and decreasing native plot groundcover within enclosures in semi-native pastures. We transplanted 18 individuals of each species per plot (18 × 30 plots = 1080 plants in total) in a 2×2 design intersecting direct pairwise interactions (additional transplanted neighbor: absent/present) with recipient patch type (Axonopus fissifolius/Paspalum notatum). Leaf length, leaf number and plant biomass were measured at the beginning and the end of the experiment along with soil nutrients and pH at patch level. Over 92% of the transplants survived. We observed an interactive effect between patch type (non-native vs. native dominated) and plant abundance at plot level on plant performance, suggesting that indirect effects at larger spatial scales can influence effects at smaller scales. Surprisingly, both species exhibited enhanced performance with increasing abundance of the non-native species at plot level. We discuss several mechanisms explaining these indirect effects including Paspalum notatum induced changes in soil pH, soil feedbacks from the soil microbial community, preconditioning effects of the native species on the recipient soil, and positive density dependence effects after transplantation.
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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.