Is pollinator visitation of Helianthus annuus (sunflower) influenced by cultivar or pesticide treatment?

Stejskalová, Martina; Konradyová, Veronika; Suchanová, Marie; Kazda, Jan

doi:10.1016/j.cropro.2018.08.018

Cited by 15 publications

(18 citation statements)

References 35 publications

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“…Pollinator-mediated dispersal did not act alone but interacted with other processes in driving floral microbiome. Contrary to the expectation of off-target effects on pollinators of agrochemical use (Park et al, 2015;Stejskalová et al, 2018), visitation of most functional groups did not respond to bactericide and/or fungicide. Rather pollinator visitation was strongly influenced by flower abundance that signals resource availability, in agreement with the observations across a broad range of plant lineages in natural ecosystems (Benadi & Pauw, 2018;Wei et al, 2020).…”

Section: Discussioncontrasting

confidence: 93%

“…habitat sharing via fungal hyphae and bacterial biofilm and by-product crossfeeding) (Deveau et al, 2018;Frey-Klett et al, 2011;Goldford et al, 2018;Smith, Shorten, Altermann, Roy, & McNabb, 2019). Agrochemical disturbance has also shown off-target effects on pollinators including altering their visitation patterns (Fisher, Coleman, Hoffmann, Fritz, & Rangel, 2017;Park, Blitzer, Gibbs, Losey, & Danforth, 2015;Stejskalová, Konradyová, Suchanová, & Kazda, 2018). Thus, agrochemical disturbance of bactericides and fungicides likely affects flower microbiome both directly (by reducing targeted microbial taxa) and indirectly (by influencing pollinator visitation).…”

Section: Introductionmentioning

confidence: 99%

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Pollinators mediate floral microbial diversity and network under agrochemical disturbance

Wei¹,

Russell

Jarrett

et al. 2020

Preprint

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How pollinators mediate microbiome assembly in the anthosphere is a major unresolved question of theoretical and applied importance in the face of anthropogenic disturbance. We addressed this question by linking visitation of diverse pollinator functional groups (bees, wasps, flies, butterflies, beetles, true bugs and other taxa) to the key properties of floral microbiome (microbial α- and β-diversity and microbial network) under agrochemical disturbance, using a field experiment of bactericide and fungicide treatments on cultivated strawberries that differ in flower abundance. Structural equation modeling was used to link agrochemical disturbance and flower abundance to pollinator visitation to floral microbiome properties. Our results revealed that (1) pollinator visitation influenced the α- and β-diversity and network centrality of floral microbiome, with different pollinator functional groups affecting different microbiome properties; (2) flower abundance influenced floral microbiome both directly by governing the source pool of microbes and indirectly by enhancing pollinator visitation; and (3) agrochemical disturbance affected floral microbiome primarily directly by fungicide, and less so indirectly via pollinator visitation. These findings improve the mechanistic understanding of floral microbiome assembly, and may be generalizable to many other plants that are visited by diverse insect pollinators in natural and managed ecosystems.

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Section: Discussioncontrasting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Pollinators mediate floral microbial diversity and network under agrochemical disturbance

Wei¹,

Russell

Jarrett

et al. 2020

Preprint

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“…However, the differences between other hybrids were not statistically significant. Similarly, Stejskalová et al (2018) confirmed statistically significant differences in the attractiveness of sunflower cultivars for bumble bees.…”

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confidence: 52%

“…Monitoring of pollinator visitation. In cultivar experiment, pollinator visitation assessments were conducted according to the same methodology as used by Stejskalová et al (2018), during days with the following conditions for pollinators flight: air temperature higher than 20°C; very light or no wind; and, no precipitation. Pollinator visitations were counted and recorded from an area of 2.1 m 2 from the edge of single plots of flowering oilseed rape for 20 s.…”

Section: Methodsmentioning

confidence: 99%

The factors influencing the pollinators visitation of the oilseed rape cultivars

Kazda¹,

Bokšová²,

Stejskalová³

et al. 2019

PLANT SOIL ENVIRON

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Currently, the hybrid cultivars are predominant in the cultivation of winter oilseed rape in Europe. Cultivation of hybrid cultivars instead of the traditional line can affect the visitation of pollinators. Beekeepers and farmers claim that hybrid cultivars are not visited by pollinators as much as the line. Ten yellow and one white flowering oilseed rape cultivars were used to compare the visitation rates of pollinators (Apis mellifera L. and Bombus sp.) during flowering in the years 2015–2017. At the same time, the visitation of hybrid and line cultivars by pollinators was evaluated. Visitation of pollinators on each cultivar was calculated from observed visitations to flowering oilseed rape plants in an area 2.1 m<sup>2</sup> from the edge of single plots for 20 s. The results from this study clearly show that the individual cultivars, whether hybrids or lines, did not have a major influence on the pollinators’ visitation, either by honey bees or bumble bees. It is thus proved that hybrid cultivars do not affect the pollinator visitation and there is no need to worry about the prevalence of these cultivars in the Czech fields. However, a more significant effect for both pollinator groups appears to have been the color of the flower.

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“…Chemically mediated disturbances are becoming more common in the Anthropocene as agrochemical use is increasing, and can reduce the abundance and richness of plant‐associated microbes, shift microbial composition (Bartlewicz et al, 2016; Schaeffer et al, 2017), and potentially rewire microbe–microbe interactions via physical and metabolic mechanisms (e.g., habitat sharing via fungal hyphae and bacterial biofilm and by‐product cross‐feeding) (Deveau et al, 2018; Frey‐Klett et al, 2011; Goldford et al, 2018; Smith et al, 2019). Agrochemical disturbance has also shown off‐target effects on pollinators, including altering their visitation patterns (Fisher et al, 2017; Park et al, 2015; Stejskalová et al, 2018). Thus, agrochemical disturbance of bactericides and fungicides probably affects the flower microbiome (Bartlewicz et al, 2016; Schaeffer et al, 2017) both directly by reducing targeted microbial taxa and indirectly by influencing pollinator visitation.…”

Section: Introductionmentioning

confidence: 99%

Pollinators mediate floral microbial diversity and microbial network under agrochemical disturbance

et al. 2021

View full text Add to dashboard Cite

How pollinators mediate microbiome assembly in the anthosphere is a major unresolved question of theoretical and applied importance in the face of anthropogenic disturbance. We addressed this question by linking visitation of diverse pollinator functional groups (bees, wasps, flies, butterflies, beetles, true bugs and other taxa) to the key properties of the floral microbiome (microbial α‐ and β‐diversity and microbial network) under agrochemical disturbance, using a field experiment of bactericide and fungicide treatments on cultivated strawberries that differ in flower abundance. Structural equation modelling was used to link agrochemical disturbance and flower abundance to pollinator visitation to floral microbiome properties. Our results revealed that (i) pollinator visitation influenced the α‐ and β‐diversity and network centrality of the floral microbiome, with different pollinator functional groups affecting different microbiome properties; (ii) flower abundance influenced the floral microbiome both directly by governing the source pool of microbes and indirectly by enhancing pollinator visitation; and (iii) agrochemical disturbance affected the floral microbiome primarily directly by fungicide, and less so indirectly via pollinator visitation. These findings improve the mechanistic understanding of floral microbiome assembly, and may be generalizable to many other plants that are visited by diverse insect pollinators in natural and managed ecosystems.

show abstract

Is pollinator visitation of Helianthus annuus (sunflower) influenced by cultivar or pesticide treatment?

Cited by 15 publications

References 35 publications

Pollinators mediate floral microbial diversity and network under agrochemical disturbance

Pollinators mediate floral microbial diversity and network under agrochemical disturbance

The factors influencing the pollinators visitation of the oilseed rape cultivars

Pollinators mediate floral microbial diversity and microbial network under agrochemical disturbance

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