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17 results for “invasive pollinator”
Invasive predators affect community-wide pollinator visitation
<p>Disruption of plant-pollinator interactions by invasive predators is poorly understood but may pose a critical threat for native ecosystems. In a multi-year field experiment in Hawaiʻi, we suppressed abundances of globally invasive predators and then observed insect visitation to flowers of six native plant species. Three plant species are federally endangered (<i>Haplostachys haplostachya</i>, <i>Silene lanceolata</i>, <i>Tetramolopium arenarium</i>) and three are common throughout their range (<i>Bidens menziesii</i>, <i>Dubautia linearis</i>, <i>Sida fallax</i>). Insect visitors were primarily generalist pollinators, including taxa that occur worldwide such as solitary bees (e.g., <i>Lasioglossum impavidum</i>), social bees (e.g., <i>Apis mellifera</i>), and syrphid flies (e.g., <i>Allograpta exotica</i>). We found that suppressing invasive rats (<i>Rattus rattus</i>), mice (<i>Mus musculus</i>), ants (<i>Linepithema humile</i>, <i>Tapinoma melanocephalum</i>), and yellowjacket wasps (<i>Vespula pensylvanica</i>) had positive effects on pollinator visitation to plants in 16 of 19 significant predator-pollinator-plant interactions. We found only positive effects of suppressing rats and ants, and both positive and negative effects of suppressing mice and yellowjacket wasps, on frequency of interactions between pollinators and plants. Model results predicted that predator eradication could increase frequency of insect visitation to flowering species, in some cases by >90%. Previous results from the system showed that these flowering species produced significantly more seed when flowers were allowed to outcross than when flowers were bagged to exclude pollinators, indicating limited autogamy. Our findings highlight the potential benefits of suppression or eradication of invasive rodents, ants, and yellowjackets in order to reverse pollination disruption, particularly in locations with high numbers of at-risk plant species or already imperiled pollinator populations.</p>
Invasive predators affect community-wide pollinator visitation
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Phylogenetic restriction of plant invasion in drought-stressed environments: implications for insect-pollinated plant communities in water-limited ecosystems
<p><span><strong>Background</strong>: Plant-pollinator community diversity has been found to decrease under conditions of drought stress, however research into the temporal dimensions of this phenomenon remains limited. In this study, we investigated the effect of seasonal drought on the temporal niche dynamics of entomophilous flowering plants in a water-limited ecosystem. We hypothesized that closely related native and exotic plants would tend to share similar life history, and that peak flowering events would therefore coincide with phylogenetic clustering in plant communities based on expected phenological responses of plant functional types to limitations in soil moisture availability.</span></p> <p><span><strong>Location</strong>:<b> </b>Galiano Island, British Columbia, Canada</span></p> <p><span><strong>Methods</strong>:<b> </b>Combining methods from pollinator research and phylogenetic community ecology, we tested the influence of environmental filtering over plant community phenology across gradients of landscape disturbance and soil moisture. Floral resource availability and community structure were quantified by counts of flowering shoots. We constructed a robust phylogeny to analyze spatial and temporal variation in phylogenetic patterns across the landscape, testing the significance of the observed patterns against a randomly generated community phylogeny. Phylogenetic metrics were then regressed against factors of disturbance and soil moisture availability. </span></p> <p><span><strong>Results</strong>:<b> </b>Critical seasonal fluctuations in floral resources coincided with significant phylogenetic clustering in plant communities, with decreasing plant diversity observed under conditions of increasing drought stress. Exotic plant species in the Asteraceae became increasingly pervasive across the landscape, occupying a late season temporal niche in drought-stressed environments.</span></p> <p><span><strong>Main conclusion</strong>:<b> </b>Results suggest that environmental filtering is the dominant assembly process structuring the temporal niche of plant communities in this water-limited ecosystem. Based on these results, and trends seen elsewhere, the overall diversity of plant-pollinator communities may be expected to decline with the increasing drought stress predicted under future climate scenarios.</span></p>
The golden threat: Solidago invasion alters native plant-pollinator interactions through vegetative structures
<p>This folder includes all files that were used for the article entitled "The golden threat: <em>Solidago</em> invasion alters native plant-pollinator interactions through vegetative structures".</p> <p>It includes: a README file, the input data for the two research question (Q1 and Q2), the RData of the respective fitted models, the PDF of the main text and sup. mat. figues, and the Rscript to reproduce them. </p>
Spillover effects from invasive Acacia alter the plant-pollinator networks and seed production of native plants
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Phylogenetic restriction of plant invasion in drought-stressed environments: implications for insect-pollinated plant communities in water-limited ecosystems
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Impacts of invasive Black Mustard on pollination of natives
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Livestock grazing is associated with seasonal reduction in pollinator biodiversity and functional dispersion but cheatgrass invasion is not: variation in bee assemblages in a multi-use shortgrass prairie
<p>Livestock grazing and non-native plant species affect rangeland habitats globally. These factors may have important effects on ecosystem services including pollination, yet, interactions between pollinators, grazing, and invasive plants are poorly understood. To address this, we tested the hypothesis that cattle grazing and site colonization by cheatgrass (Bromus tectorum) impact bee foraging and nesting habitats, and the biodiversity of wild bee communities, in a shortgrass prairie system. Bee nesting habitats (litter and wood cover) were marginally improved in non-grazed sites with low cheatgrass cover, though foraging habitat (floral cover and richness, bare soil) did not differ among cattle-grazed sites or non-grazed sites with low or high cheatgrass cover. However, floral cover was a good predictor of bee abundance and functional dispersion. Mean bee abundance, richness, diversity and functional diversity were significantly lower in cattle-grazed habitats than in non-grazed habitats. Differences in bee diversity among habitats were pronounced early in the growing season (May) but by late-season (August) these differences eroded as Melissodes spp. and Bombus spp. became more abundant at study sites. Fourth-corner analysis revealed that sites with high floral cover tended to support large, social, polylectic bees; sites with high grass cover tended to support oligolectic solitary bees. Both cattle-grazed sites and sites with high cheatgrass cover were associated with lower abundances of above-ground nesting bees but higher abundance of below-ground nesters than non-grazed sites with low cheatgrass cover. We conclude that high cheatgrass cover is not associated with reduced bee biodiversity or abundance, but cattle grazing was negatively associated with bee abundances and altered species composition. Although floral cover is an important predictor of bee assemblages, this was not impacted by cattle grazing and our study suggests that cattle likely impact bee communities through effects other than those mediated by forbs, including soil disturbance or nest destruction. Efforts aimed at pollinator conservation in prairie habitats should focus on managing cattle impacts early in the growing season to benefit sensitive bee species.</p>
Data from: The most effective pollinator principle applies to new invasive pollinators
G.L. Stebbins' most effective pollinator principle states that when pollinators are not limiting, plants are expected to specialize and adapt to the more abundant and effective pollinator species available. In this study, we quantify the effectiveness of bees, hummingbirds and hawkmoths in a Chilean population of Erythranthe lutea (Phrymaceae), and examine whether flower traits are subject to pollinator-mediated selection by the most effective pollinator species during two consecutive years. Unlike most species in the pollinator community, the visitation rate of the recently arrived Bombus terrestris did not change substantially between years, which together its high and stable pollen delivery to flower stigmas made this species the most important in the pollinator assemblage followed by the solitary bee Centris nigerrima. Flower traits were under significant selection in the direction expected for short-tongue bees, suggesting that E. lutea is in the initial steps of adaptation to the highly effective exotic bumblebee. Our results confirm the applicability of Stebbins' principle for new invasive pollinators, and stress their importance in driving flower adaptation of native plant species, a critical issue in the face of biotic exchange and homogenization.
Livestock grazing is associated with seasonal reduction in pollinator biodiversity and functional dispersion but cheatgrass invasion is not: variation in bee assemblages in a multi-use shortgrass prairie
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Data from: The most effective pollinator principle applies to new invasive pollinators
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Data from: Consequences of plant invasions on compartmentalization and species' roles in plant–pollinator networks
Compartmentalization—the organization of ecological interaction networks into subsets of species that do not interact with other subsets (true compartments) or interact more frequently among themselves than with other species (modules)—has been identified as a key property for the functioning, stability and evolution of ecological communities. Invasions by entomophilous invasive plants may profoundly alter the way interaction networks are compartmentalized. We analysed a comprehensive dataset of 40 paired plant–pollinator networks (invaded versus uninvaded) to test this hypothesis. We show that invasive plants have higher generalization levels with respect to their pollinators than natives. The consequences for network topology are that—rather than displacing native species from the network—plant invaders attracting pollinators into invaded modules tend to play new important topological roles (i.e. network hubs, module hubs and connectors) and cause role shifts in native species, creating larger modules that are more connected among each other. While the number of true compartments was lower in invaded compared with uninvaded networks, the effect of invasion on modularity was contingent on the study system. Interestingly, the generalization level of the invasive plants partially explains this pattern, with more generalized invaders contributing to a lower modularity. Our findings indicate that the altered interaction structure of invaded networks makes them more robust against simulated random secondary species extinctions, but more vulnerable when the typically highly connected invasive plants go extinct first. The consequences and pathways by which biological invasions alter the interaction structure of plant–pollinator communities highlighted in this study may have important dynamical and functional implications, for example, by influencing multi-species reciprocal selection regimes and coevolutionary processes.
Contrasting effects of invasive plants in plant-pollinator networks
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Data from: Latitudinal pattern of flowering synchrony in an invasive wind-pollinated plant
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Data from: Consequences of plant invasions on compartmentalization and species’ roles in plant–pollinator networks
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Invader-pollinator paradox: invasive goldenrods benefit from large size pollinators
<p><b>Aim</b>: Mutualistic interactions between alien plants and native pollinators are needed to enable plant invasions. Although the increasing abundance of invasive plants in a habitat causes a dramatic decline of native pollinators, pollination services received by invaders are often sustained. This invader-pollinator paradox might be attributed to differences in pollination efficiency and varying vulnerability to invasion among pollinators with different life-history traits. In an experimental study, we explored the relationships between pollinator body size, pollination efficiency and abundance of invasive species.</p> <p><b>Methods</b>: We placed a pair of potted invasive goldenrods (<i>Solidago gigantea</i>) at 25 sites differing in goldenrod abundance (cover: 0–100 %). Floral visitation rate of the potted goldenrods, as well as seed set and viability, were noted.</p> <p><b>Location</b>: Kraków area, Poland.</p> <p><b>Results</b>: Species richness of pollinators visiting inflorescences decreased with the increase of the goldenrod cover, whereas the floral visitation rate remained unchanged. However, the seed set was positively related to the goldenrod cover. Body size of floral visitors was structured along with the goldenrod cover so that pollinators' size increased with the cover. Also, the seed set of the potted plants, as well as goldenrod seed viability, depended positively on the body size of visiting pollinators.</p> <p><b>Main conclusions</b>: Invasive goldenrods did not suffer from pollinator shortage and inefficient pollination, especially in habitats densely covered by the invader, due to the presence of large-bodied pollinators. Our study highlights that pollination and reproduction of invasive plants might be sustained through ecological filtering, affecting the composition of pollinators with traits increasing pollination efficiency.</p>
Invader-pollinator paradox: invasive goldenrods benefit from large size pollinators
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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.