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10 results for “pollinator niche”
Evolutionary history and precipitation seasonality shape niche overlap in Neotropical bat-plant pollination networks
<p>Species interactions are one dimension of the niche, and niche overlap arises when two species share an interaction partner. In pollination systems, environmental and biotic factors impact the niche overlap. Here we explored the effects of climate seasonality, plant and bat richness, morphological traits, and phylogenetic distance in shaping the niche overlap of Neotropical bat-plant pollination networks. For that, we used a dataset of 22 bat-plant pollination networks in the Neotropical region. We measured niche overlap in bats and plants with the Morisita-Horn index, ĈH, and then, we used a SAR model to test the relationships between niche overlap and the abiotic and biotic factors. We found a lower niche overlap among bats in communities composed of phylogenetically distant bat species. Moreover, plant and bat overlap were lower in regions with higher precipitation seasonality. Our results indicate that climate seasonality and bat evolutionary history drive niche overlap in Neotropical bat-plant pollination interactions. These findings suggest that a higher precipitation seasonality may promote the emergence of temporal modules reducing niche overlap, probably as a consequence of seasonal species phenologies. Furthermore, the method used to record the interactions impacts the degree of niche overlap. Interactions recorded with pollen samples tend to have higher niche overlap than direct observations. The uncoupled responses of morphological traits and phylogenetic distances in bat niche overlap suggest an effect of historical processes independently of the morphological traits. Our study reinforced the importance of evolutionary history and ecological processes in imprinting patterns of interaction niche overlap.</p>
Data from: Drivers of viral prevalence in landscape-scale pollinator networks across Europe: Honey bee viral density, niche overlap with this reservoir host and network architecture
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Evolutionary history and precipitation seasonality shape niche overlap in Neotropical bat-plant pollination networks
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Multivariate flower phenotype and proboscis length shape specialised pollination niches
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Pollinator community and generalisation of pollinator spectra changes with plant niche width and local dominance
<p>Floral traits are assumed to be the main determinants of plants' pollinator spectrum, yet a majority of temperate plant species possess traits allowing for a certain degree of generalisation of their pollinator spectrum. The actual level of pollinator spectrum generalisation is likely to be the result of both plant floral traits and the diversity and abundance of plant species a plant co-occurs with. We expect that plant species co-occurring in highly diverse plant communities should host more generalised pollinator spectra. In the present study, we explore the degree to which the composition and generalisation of plant-pollinator spectra depend on the plant's niche width (measured as co-occurrence with other plant species) and its local dominance (as measured by mean cover in the community). For this purpose, we compiled a database of >250 plant species pollinator spectra from the literature and coupled it with data on plant niche width and local dominance based on the Czech National Phytosociological Database. Species with wider niches had on average more generalised pollinator spectra, ranging from bumblebee-dominated spectra to Diptera- and/or nitidulid beetle-dominated spectra, which was strongly related to plant phylogeny. Plants with bumblebee-dominated spectra had neither wide nor narrow niches. The majority of plants had either muscid-, hoverfly- or nitidulid-dominated or completely generalised pollinator spectra. Among such plants, higher local dominance increased the proportion of opportune muscids in pollinator spectrum, while hoverflies showed the opposite pattern. Honeybees although rather infrequent in pollinator spectra also showed a strong response to locally dominant plant species.</p> <p><em>Synthesis</em>: The composition of a plant's pollinator spectrum is not independent of other aspects of the plant's life-history, namely, niche width and the ability to dominate the community. Wider plant species niches result in more generalised pollinator spectra, supporting our hypothesis that habitat generalists are less prone to specialisation on particular pollinator groups. Conversely, the ability to dominate local plant communities influenced pollinator spectra mainly through specific responses of individual pollinator groups.</p>
Data from: Frequency dependence of pollinator visitation rates suggests that pollination niches can allow plant species coexistence
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Pollinator community and generalisation of pollinator spectra changes with plant niche width and local dominance
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Data from: Low functional diversity promotes niche changes in natural island pollinator communities
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Data from: Effect of pollination strategy, phylogeny and distribution on pollination niches of Euro-Mediterranean orchids
1. Pollination niches are important components of ecological niches and have played a major role in the diversification of Angiosperms. In this study, we focused on Euro-Mediterranean orchids, which use diverse pollination strategies and interact with various functional groups of insects. In these orchids, we investigated the determinants of pollination niche breadth and overlap by analysing the orchid-pollinator network and the factors that may have shaped it. 2. We constructed a database reporting 1278 interactions between 243 orchid and 773 pollinator species based on a thorough literature review. We then focused on 153 orchid species for which phylogenetic data were available. We used Bayesian phylogenetic mixed models to study the relationship between specialisation (as estimated by the degree and degree in the projected network), pollination strategy and breadths of orchids' spatial and temporal distributions, while correcting for the effect of phylogenetic relationships among orchid species and sampling effort. We then used a singular value decomposition of the orchid-pollinator matrix combined to a redundancy and variation partitioning analyses to investigate the determinants of similarity in pollination niches between orchids. 3. Specialisation was higher in deceptive than in nectar-producing orchids and decreased with the breadth of orchids' spatial distribution. When interactions were considered at the insect family level, similarity in pollination niches between orchids was solely explained by their pollination strategy and phylogeny. By contrast, when they were considered at the insect species level, this similarity was primarily explained by their geographical range and flowering time, although other factors had significant effects as well, with orchids using the same pollination strategy, being closely related and growing in the same habitats sharing more insect species than expected. 4. Synthesis. Specialisation in orchid-pollinator interactions depends on orchids' pollination strategy and geographical range. The pool of insect families with which orchids interact depends on their pollination strategy and phylogeny, with consistent associations between some functional or phylogenetic groups of orchids and some families of pollinators. By contrast, the pool of insect species with which orchids interact depends on their spatio-temporal distribution, suggesting that at a finer scale, orchid-pollinator interactions are more opportunistic than previously thought.
Data from: Effect of pollination strategy, phylogeny and distribution on pollination niches of Euro-Mediterranean orchids
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Allen Brain Atlas
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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
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