Effects of agricultural landscape structure, insecticide residues, and pollen diversity on the life-history traits of the red mason bee Osmia bicornis

Bednarska, Agnieszka J.; Mikołajczyk, Łukasz; Ziółkowska, Elżbieta; Kocjan, Karolina; Wnęk, Agnieszka; Mokkapati, Jaya Sravanthi; Teper, Dariusz; Kaczyński, Piotr; Łozowicka, Bożena; Śliwińska, Renata; Laskowski, Ryszard

doi:10.1016/j.scitotenv.2021.151142

Cited by 22 publications

(16 citation statements)

References 66 publications

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“…Overall, in all the above three diets, we found large proportions of pollen grains from oaks, willows, and maples as well as Parthenocissus sp. and Filipendula sp., which is in line with literature data (Bednarska et al, 2021;Casanelles-Abella et al, 2021;Teper, 2007), con rming the importance of these species for O. bicornis. Therefore, considering the pollen pools directly available to bee larvae, we infer that the species composition of the larval pollen diet is more important for providing an adequate nutritional balance than the diversity of the larval pollen diet.…”

Section: Discussionsupporting

confidence: 92%

Unravelling the dependence of a wild bee on floral diversity and composition using a feeding experiment

Filipiak

Denisow

Stawiarz

et al. 2022

Preprint

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We investigated nutrition as a potential mechanism underlying the link between floral diversity/composition and wild bee performance. The health, resilience, and fitness of bees may be limited by a lack of nutritionally balanced larval food (pollen), influencing the entire population, even if adults are not limited nutritionally by the availability and quality of their food (mainly nectar). We hypothesized that the nutritional quality of bee larval food is indirectly connected to the species diversity of pollen provisions and is directly driven by the pollen species composition. Therefore, the accessibility of specific, nutritionally desirable key plant species for larvae might promote bee populations. Using a fully controlled feeding experiment, we simulated different pollen resources that could be available to bees in various environments, reflecting potential changes in floral species diversity and composition that could be caused by landscape changes. Suboptimal concentrations of certain nutrients in pollen produced by specific plant species resulted in reduced bee fitness. The negative effects were alleviated when scarce nutrients were added to these pollen diets. The scarcity of specific nutrients was associated with certain plant species but not with plant diversity. Thus, one of the mechanisms underlying the decreased fitness of wild bees in homogenous landscapes may be nutritional imbalance, i.e., the scarcity of specific nutrients associated with the presence of certain plant species and not with species diversity in pollen provisions eaten by larvae. Accordingly, we provide a conceptual representation of how the floral species composition and diversity can impact bee populations by affecting fitness-related life history traits. Additionally, we suggest that mixes of ‘bee-friendly’ plants used to improve the nutritional base for wild bees should be composed considering the local flora to supplement bees with vital nutrients that are scarce in the considered environment.

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Section: Discussionsupporting

confidence: 92%

Unravelling the dependence of a wild bee on floral diversity and composition using a feeding experiment

Filipiak

Denisow

Stawiarz

et al. 2022

Preprint

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“…Osmia bicornis , which is widespread in agricultural environments across Europe, has been shown to collect the largest proportion of its early‐season diet from wind‐pollinated Quercus (Bednarska et al, 2021; Bertrand et al, 2019; Free & Williams, 1970; Persson et al, 2018; Ruddle et al, 2018; Yourstone et al, 2021) followed, in some cases, by Acer (Bertrand et al, 2019; Yourstone et al, 2021). Across the northern hemisphere, several other species of Osmia have also been shown, on occasion at least, to collect large quantities of Quercus pollen (Haider et al, 2014; Kraemer & Favi, 2005; Kratschmer et al, 2020; MacIvor et al, 2014; Vicens et al, 1994; Williams & Kremen, 2007).…”

Section: Introductionmentioning

confidence: 99%

Canopy sampling reveals hidden potential value of woodland trees for wild bee assemblages

Allen

Davies

2022

Insect Conserv Diversity

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1. Woodlands can play an important role in supporting bee abundance and diversity in agricultural landscapes. However, in temperate-region studies, the canopy is rarely sampled, and our understanding of its contribution is limited.2. To explore this, we sampled bees in late spring with blue vane traps in the understory (n = 30) and crowns of mature Quercus robur (n = 35) at the exposed southern edges and in the interiors (ca. 25-75 m from woodland edges) of 15 woodland sites across an English agricultural landscape.3. A significant proportion of bee abundance and diversity was found in the canopy: canopy-trap catches were estimated to be a third as large as understory-trap catches, and 23 of the 29 sampled species were present in the canopy. Of the seven most common species sampled, four were equally abundant in woodland edge and interior traps; three were more abundant in understory traps, and a single species-Bombus lapidarius-was more abundant in canopy traps. The sex ratio of the most abundant species, B. pratorum, was female-skewed in the canopy. Additionally, the presence of nearby Acer pseudoplatanus trees in flower greatly increased canopy-trap catches in woodland interiors.4. These results suggest that both the woodland canopy and understory have a significant role to play in supporting farmland bee communities; they indicate the importance of nectar-producing trees in woodland interiors, opening avenues for canopy-based management; and they demonstrate that a diverse bee community has the potential to exploit canopy floral resources.

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“…Mean proportion of oral families in pollen provisions in different sites a LOQ values for the 510 active ingredients (a.i.) tested can be found in Table S7 of the Supplementary materials in Bednarska et al 20 .…”

Section: Pollen Typementioning

confidence: 99%

“…It was shown that proximity to oilseed cultivation positively affects the number of nesting Osmia bicornis, but it was suggested that oilseed rape bene ts solitary bees in the form of abundant nectar for foraging ights rather than pollen for brood provisioning [17][18][19] . However, B. napus has been also identi ed as an important source of pollen for O. bicornis larvae [20][21][22][23] . The quality of pollen is very important to the larvae but, if contaminated with pesticides, it can affect negatively larval development 24 .…”

Section: Introductionmentioning

confidence: 99%

Floral resources, energetic value and pesticide residues in larval provisions collected by Osmia bicornis in oilseed rape dominated landscape

Misiewicz

Mikołajczyk

Bednarska

2023

Preprint

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Pollinators in agricultural landscapes are facing global decline and the main pressures include food scarcity and pesticide usage. Although intensive agricultural landscapes are poor habitats for wild pollinators, the mass flowering crops may provide important food resources, albeit monofloral and short-term, which in addition may contain pesticide residues. We explored how the landscape composition with a different proportion of oilseed rape (6%-65%) around Osmia bicornis nests affects floral diversity, contamination with pesticides, and energetic value of provisions collected by bees as food for their offspring. The bees collected pollen from 28 floral taxa (6-15 per nest) and provisions were dominated by Brassica napus (6.0-54.2%), Quercus (1.2-19.4%) and Ranunculus (0.4-42.7%) found in all 12 nests, but also by Poaceae (1.2-59.9%, 11 nests) and Acer (0.6-42%, 8 nests). Residues of 12 pesticides were found in provisions, with acetamiprid, azoxystrobine, boscalid, and dimethoate being the most frequently detected at concentrations up to 1.2, 198.4, 16.9 and 17.8 ng/g, respectively. Floral diversity and energetic value of provisions, but not the Pesticide Risk Index depended on landscape structure. Moreover, pollen diversity decreased, and energetic value increased with landscape diversity. Thus, even a structurally simple landscape may provide diverse food for O. bicornis if the nest is located close to a single but resource-diverse patch. Both B. napus and non-crop pollen were correlated with pesticide concentrations.

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Effects of agricultural landscape structure, insecticide residues, and pollen diversity on the life-history traits of the red mason bee Osmia bicornis

Cited by 22 publications

References 66 publications

Unravelling the dependence of a wild bee on floral diversity and composition using a feeding experiment

Unravelling the dependence of a wild bee on floral diversity and composition using a feeding experiment

Canopy sampling reveals hidden potential value of woodland trees for wild bee assemblages

Floral resources, energetic value and pesticide residues in larval provisions collected by Osmia bicornis in oilseed rape dominated landscape

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