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76 results for “Plant-pollinator interaction”
Flower color and flowering phenology mediate plant-pollinator interaction assembly in a diverse co-flowering community
<p>Uncovering the role of competition and facilitation in community assembly is central for developing a predictive understanding of the forces that organize biodiversity. Standard trait-based approaches however rely on detection of only one assembly mechanism (competition or facilitation) along a single trait even though pollinator-mediated plant-plant interactions can be structured along multiple phenotypic, phenological and ecological traits. We evaluated plant species distribution along multiple phenotypic and ecological traits (flower color, flowering time, pollinator sharing) and described an entire co-flowering community as a set of modules with unique patterns of assembly, to test predictions regarding the relative contribution of competition and facilitation to the assembly of a diverse co-flowering community. We show a modular pattern of flower color assembly. Flower color modules differ in their spectral reflectance patterns including color hue and saturation. Within modules, however, species are differentially assembled along phenological and ecological traits (pollinator sharing) depending on the main pollinator group visiting plant species within each module. Results suggest different trait assembly patterns within individual trait-modules in the same co-flowering community and that different trait-patterns can result from the same type of ecological interaction. This study reveals empirical evidence of community assembly along multiple axes of trait differentiation and raises caution when interpreting assembly patterns based on a single trait.</p>
Landscape simplification leads to loss of plant-pollinator interaction diversity and flower visitation frequency despite buffering by abundant generalist pollinators
<p>Global change, especially landscape simplification, is a main driver of species loss that can alter ecological interaction networks, with potentially severe consequences to ecosystem functions. Therefore, understanding how landscape simplification affects the rate of loss of plant-pollinator interaction diversity (i.e., number of unique interactions) compared to species diversity alone, and the role of persisting abundant pollinators, is key to assess the consequences of landscape simplification on network stability and pollination services. We analysed 24 landscape-scale plant-pollinator networks from standardised transect walks along landscape simplification gradients in three countries. We compared the rates of species and interaction diversity loss along the landscape simplification gradient and then stepwise excluded the top 1-20% most abundant pollinators from the data set to evaluate their effect on interaction diversity, network robustness to secondary loss of species, and flower visitation frequencies in simplified landscapes. Interaction diversity was not more vulnerable than species diversity to landscape simplification, with pollinator and interaction diversity showing similar rates of erosion with landscape simplification. We found that 20% of both species and interactions are lost with an increase of arable crop cover from 30 to 80% in a landscape. The decrease in interaction diversity was partially buffered by persistent abundant generalist pollinators in simplified landscapes, which were nested subsets of pollinator communities in complex landscapes, while plants showed a high turnover in interactions across landscapes. The top 5% most abundant pollinator species also contributed to network robustness against secondary species loss, but could not prevent flowers from a loss of visits in simplified landscapes. Although persistent abundant pollinators buffered the decrease in interaction diversity in simplified landscapes and stabilised network robustness, flower visitation frequency was reduced, emphasising potentially severe consequences of further ongoing land-use change for pollination services.</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>
Data from: Spatiotemporal variation in the role of floral traits in shaping tropical plant-pollinator interactions
<p>Supplementary datasets for <strong>Klomberg <em>et al.</em> 2021 Spatiotemporal variation in the role of floral traits in shaping tropical plant-pollinator interactions</strong><strong>.</strong> <em>Ecology Letters.</em></p> <p>All related information can be found in the cited paper.</p> <p>When using the dataset for anything, cite the Klomberg <em>et al. </em>paper.</p> <p>For additional information, refer to the paper or write to robert.tropek@gmail.com</p>
Data for: Honey bees (Apis mellifera) modify plant-pollinator network structure, but do not alter wild species' interactions
<p>Honey bees (<em>Apis mellifera</em>) are widely used for honey production and crop pollination, raising concern for wild pollinators, as honey bees may compete with wild pollinators for floral resources. The first sign of competition, before changes appear in wild pollinator abundance or diversity, may be changes to wild pollinator interactions with plants. Such changes for a community can be measured by looking at changes to metrics of resource use overlap in plant-pollinator interaction networks. Studies of honey bee effects on plant-pollinator networks have usually not distinguished whether honey bees alter wild pollinator interactions, or if they merely alter total network structure by adding their own interactions. To test this question, we experimentally introduced honey bees to a Canadian grassland and measured plant-pollinator interactions at varying distances from the introduced hives. We found that honey bees increased the network metrics of pollinator and plant functional complementarity and decreased interaction evenness. However, in networks constructed from just wild pollinator interactions, honey bee abundance did not affect any of the metrics calculated. Thus, all network structural changes to the full network (including honey bee interactions) were due only to honey bee-plant interactions, and not to honey bees causing changes in wild pollinator-plant interactions. Given widespread and increasing use of honey bees, it is important to establish whether they affect wild pollinator communities. Our results suggest that honey bees did not alter wild pollinator foraging patterns in this system, even in a year that was drier than the 20-year average.</p>
Data from: Honey bees (Apis mellifera) modify plant-pollinator network structure, but do not alter wild species’ interactions
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Landscape simplification leads to loss of plant-pollinator interaction diversity and flower visitation frequency despite buffering by abundant generalist pollinators
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Flower color and flowering phenology mediate plant-pollinator interaction assembly in a diverse co-flowering community
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Adaptive evolution can mitigate the negative effects of temperature stress on plant-pollinator interactions
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Sites dominated by common fiddleneck (Amsinckia menziesii var. intermedia) support diverse plant-pollinator interactions
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Data from: Plant-pollinator interactions along an urbanization gradient from cities and villages to farmland landscapes
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Plant-pollinator interactions in Mediterranean semiarid ecosystems
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Data from: Trait matching and phenological overlap increase the spatio-temporal stability and functionality of plant-pollinator interactions
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The role of plant-pollinator interactions in structuring nectar microbial communities
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MetaComNet: A random forest-based framework for making spatial prediction of plant-pollinator interactions
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Data from: Interaction rewiring and the rapid turnover of plant-pollinator networks
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Phenological turnover matters when making trait-based predictions of plant-pollinator interactions
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Effects of herbivory and pathogen infection on plant-pollinator interactions
<p><span>Plant enemies can indirectly affect pollinators by modifying plant traits, but simultaneous tests of herbivore and pathogen effects are lacking, and the role of floral volatiles has seldom been mechanistically assessed.</span></p> <p><span>In this study, we tested for indirect effects of insect herbivores and pathogens on pollinator attraction via altered floral volatile emissions, and its consequences for plant fitness in <em>Brassica rapa</em>. Plants in the field were exposed to either no damage or damage by caterpillars (<em>Mamestra brassicae</em>), aphids (<em>Brevicoryne brassicae</em>), a leaf fungus (<em>Sclerotinia sclerotiorum</em>), or a bacterium (<em>Xanthomonas campestris </em>pv. <em>campestris</em>). We recorded pollinator visits, and measured floral traits (flower number, volatiles) and plant fitness-correlates. </span><span>We additionally</span><span> performed a greenhouse experiment with artificial emitters to test for effects of target floral volatiles on pollinator attraction.</span></p> <p><span>In the field experiments, plants subjected to herbivory by the aphid <em>B. brassicae</em> (but not the other enemies) exhibited a marked reduction in the emission of two VOCs (nonanal and 2-butyl-1-octanol), experienced lower pollinator visits, and produced seeds of lower quality in terms of seed biomass and germination rate, while flower output itself was not affected. Artificial emitters with reduced amounts of these compounds were less attractive to pollinators under greenhouse conditions.</span></p> <p><span><em>Synthesis: </em>These results provide strong evidence for volatile-mediated indirect interactions between plant enemies and pollinators ultimately impacting plant fitness, and further point at enemy and compound specificity underlying such effects.</span></p>
Habitat loss increases seasonal interaction rewiring in plant-pollinator networks
<p>Understanding the flexibility of interactions and network rewiring (i.e. reassembly of interactions due to partner-switching) is necessary to comprehend how future anthropogenic changes will affect interspecific interactions and the functioning of communities. A higher rewiring could be expected in more disturbed landscapes because these landscapes contain fewer and more generalist species with more homogeneous traits. We sampled pollination interactions in 20 wild Olea europaea communities along a disturbance gradient to evaluate the hypothesis that the loss of natural habitats increases seasonal (within-year) interaction rewiring in plant-pollinator communities, influencing their functional structure. For this, we particularly tested whether rewiring frequency was negatively related to the extent of natural habitats surrounding the communities, whether interaction rewiring influenced the static structure of networks (nestedness, network specialization –H2'–), and whether a high generalization (low specialization –d'–) and abundance of species in communities made them more prone to rewiring. We show that habitat loss increased seasonal interaction rewiring in networks. Changes in rewiring were related to changes in the cumulative static structure of pollination networks. Nestedness decreased and network specialization (H2') also tended to decrease as interaction rewiring increased, suggesting an indirect effect of habitat loss on the robustness of networks through their dynamics. As expected, generalist insect and plant species were more prone to rewiring. However, flower abundance had different effects on the rewiring probability of plant species depending on the extent of habitat loss, with abundant species rewiring more in disturbed communities and rewiring less in more natural communities. Likely, this is related to the context-dependent foraging behaviour of pollinators, which may switch to more abundant species if the cost of searching for trait-matching resources is high in disturbed habitats. Our work shows the role of partner-switching in generalist species to adapt to new conditions. It also highlights the importance of going beyond general network metrics to understand the underlying processes of community-level interaction assembly, and predict and anticipate the effects of anthropogenic disturbances on pollination services.</p>
Does phenology explain plant-pollinator interactions at different latitudes? An assessment of its explanatory power in plant-hoverfly networks in French calcareous grasslands
<p>These are the data supporting the results in the paper entitled: <strong>"</strong>Does phenology explain plant-pollinator interactions at different latitudes? An assessment of its explanatory power in plant-hoverfly networks in French calcareous grasslands"</p> <p><strong>Authors: </strong>Natasha de Manincor¹*, Nina Hautekeete¹, Yves Piquot¹, Bertrand Schatz², Cédric Vanappelghem³, François Massol¹<sup>,4</sup></p>
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