Habitat heterogeneity helps to mitigate pollinator nectar sugar deficit and discontinuity in an agricultural landscape

Jachuła, Jacek; Wrzesień, Małgorzata

doi:10.1016/j.scitotenv.2021.146909

Cited by 30 publications

(26 citation statements)

References 98 publications

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“…As well as a positive relationship with pollinator abundance and diversity in the absence of insecticides, floral resources were important to bumblebee abundance in landscapes with high habitat diversity. This is unsurprising as a diversity of habitats provides a range of nesting resources for bumblebees [26], and a correspondingly high level of continuous food supply is required to support healthy colonies [64]. As central place foragers, bees are more likely to forage efficiently when flowering plants are abundant within a short distance of the nest [65].…”

Section: Discussionmentioning

confidence: 99%

Landscape-scale drivers of pollinator communities may depend on land-use configuration

Gillespie

Baude

Biesmeijer

et al. 2022

Phil. Trans. R. Soc. B

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Research into pollinators in managed landscapes has recently combined approaches of pollination ecology and landscape ecology, because key stressors are likely to interact across wide areas. While laboratory and field experiments are valuable for furthering understanding, studies are required to investigate the interacting drivers of pollinator health and diversity across a broader range of landscapes and a wider array of taxa. Here, we use a network of 96 study landscapes in six topographically diverse regions of Britain, to test the combined importance of honeybee density, insecticide loadings, floral resource availability and habitat diversity to pollinator communities. We also explore the interactions between these drivers and the cover and proximity of semi-natural habitat. We found that among our four drivers, only honeybee density was positively related to wild pollinator abundance and diversity, and the positive association between abundance and floral resources depended on insecticide loadings and habitat diversity. By contrast, our exploratory models including habitat composition metrics revealed a complex suite of interactive effects. These results demonstrate that improving pollinator community composition and health is unlikely to be achieved with general resource enhancements only. Rather, local land-use context should be considered in fine-tuning pollinator management and conservation. This article is part of the theme issue ‘Natural processes influencing pollinator health: from chemistry to landscapes’.

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Section: Discussionmentioning

confidence: 99%

Landscape-scale drivers of pollinator communities may depend on land-use configuration

Gillespie

Baude

Biesmeijer

et al. 2022

Phil. Trans. R. Soc. B

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“…The quantity of food resources is determined by the abundance of flowers present in the landscapenamely the number of plants/flowers present per species and the overall amount of flowering species [30]. The quality of food resources depends on the composition of different flowering plant species because each plant species provides pollen and/or nectar with a specific nutrient profile [31]. In fact, the nutritional profiles of pollen and nectar vary greatly among different plant species [32][33][34][35] and even between plant individuals of the same species growing in different plant communities [36].…”

Section: Highlightsmentioning

confidence: 99%

Critical links between biodiversity and health in wild bee conservation

Parreño

Alaux

Brunet

et al. 2022

Trends in Ecology & Evolution

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“…Changes in land use have resulted in widespread declines in pollinators and their habitat due to a multitude of factors, including increased pesticide use and floral resource decline (Goulson et al, 2015; Jachuła et al, 2021; Raven & Wagner, 2021). Diverse and abundant pollinator assemblages require a similar diversity and abundance of floral resources to meet requirements for species with varying feeding syndromes and seasonal timing of life cycle events (Biella et al, 2019; Kral‐O'Brien et al, 2021; Potts, Vulliamy, Dafni, Ne'eman, & Willmer, 2003).…”

Section: Introductionmentioning

confidence: 99%

Spatially discrete disturbance processes enhance grassland floral resources

Duquette

Hovick

Geaumont³

et al. 2022

Journal of Applied Ecology

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resources and may delay flower availability. Similarly, grazing removes competitors of flowering plants, but destroys flower heads.2. To address this knowledge gap, we investigated the impacts of rotational fire and cattle grazing (patch-burn grazing with one and two seasons of fire per year) versus traditional season-long grazing with no fire on floral resources in mixed-grass prairie. In patch-burn treatments, part of each pasture is burned each year, which focuses grazing activity due to the high-quality regrowth. We aimed to use fire to remove litter around flowering plants while also sheltering established flower heads from grazing pressure by directing cattle away from regenerating forbs in unburned portions of the landscape. Over two summers, we performed weekly flower surveys in season-long grazing and patch-burn grazing pastures. We analysed total seasonal floral resources, maximum floral abundance and seasonal species richness between treatments.3. Over 2 years, we surveyed 1,238,241 ramets of 160 species, focusing on 36 common species for individual analysis. We found broad positive associations between patch-burn grazing and total seasonal flower abundance, maximum flower abundance and species richness compared to traditional management.In most cases, patch-burn grazing with dormant and growing season fires produced higher floral abundance, total seasonal floral resources and species richness than patch-burning with dormant season fires alone, suggesting benefits of increased levels of pyrodiversity.

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Habitat heterogeneity helps to mitigate pollinator nectar sugar deficit and discontinuity in an agricultural landscape

Cited by 30 publications

References 98 publications

Landscape-scale drivers of pollinator communities may depend on land-use configuration

Landscape-scale drivers of pollinator communities may depend on land-use configuration

Critical links between biodiversity and health in wild bee conservation

Spatially discrete disturbance processes enhance grassland floral resources

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