Interactions of local habitat type, landscape composition and flower availability moderate wild bee communities

Neumüller, Ulrich; Burger, Hannah; Krausch, Sabrina; Blüthgen, Nico; Ayasse, Manfred

doi:10.1007/s10980-020-01096-4

Cited by 26 publications

(32 citation statements)

References 76 publications

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“…Data on bee species and abundance were provided by the BienABest project (www.biena best.de). Here, at each location (n = 3), each plot (n = 3) and each sampling date (n = 3), wild bees were sampled during one day once before and once after noon by means of walking along the available resources for 25 min [40]. Each bee observed was noted and the bees that could not be identified to species level at first sight were caught and identified in the laboratory.…”

Section: Bee Species Richness and Abundancementioning

confidence: 99%

Floral traits are associated with the quality but not quantity of heterospecific stigmatic pollen loads

et al. 2020

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Background In flowering communities, plant species commonly share pollinators and therefore plant individuals receive heterospecific pollen (HP). However, the patterns of HP transfers can deviate from patterns of plant-pollinator visitations. Although flower-visitor interactions are known to be mediated by floral traits, e.g. floral size or nectar tube depth, the explanatory power of these traits for HP transfer patterns remains elusive. Here, we have explored pollen transfer patterns at three sites in Southern Germany on three dates (early, mid and late summer). At the plant level, we tested whether flower abundance and floral traits are correlated with HP reception and donation. At the community level, we determined whether flower and bee diversity are correlated with network modularity and whether floral traits explain the module affiliation of plant species. We collected the stigmas of flowering plant species, analysed HP and conspecific pollen (CP) loads and measured floral traits, flower and bee diversity. Results Our results show that the degree and intensity of HP reception or donation at the plant level do not correlate with floral traits, whereas at the community level, the module affiliation of who is sharing pollen with whom is well-explained by floral traits. Additionally, variation in network modularity between communities is better explained by plant diversity and abundance than by bee diversity and abundance. Conclusions Overall, our results indicate that floral traits that are known to mediate flower-visitor interactions can improve our understanding of qualitative HP transfer but only provide limited information about the quantity of HP transfer, which more probably depends on other floral traits, flower-visitor identity or community properties.

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Section: Bee Species Richness and Abundancementioning

confidence: 99%

Floral traits are associated with the quality but not quantity of heterospecific stigmatic pollen loads

et al. 2020

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“…Great importance was attached to not taking any individuals from nature as long as they could be reliably identified in the field (by sight or by temporary capture). In the case of wild bees, the same approach was followed as in the BienABest project (Neumüller et al 2020(Neumüller et al , 2021.…”

Section: Data Collectionmentioning

confidence: 99%

Between perfect habitat and ecological trap: even wildflower strips mulched annually increase pollinating insect numbers in intensively used agricultural landscapes

Schmied

Getrost²,

Diestelhorst³

et al. 2022

J Insect Conserv

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The loss of biodiversity and biomass of insects has a detrimental effect on eco-systems and associated ecosystem services, e.g. pollination. For this reason, various nature conservation measures for the promotion of insects are being created in agricultural landscapes. One of those measures is the so-called flower strip at the edge of fields. However, it is repeatedly propagated in the nature conservation community that by means of annually mulched flower strips, species richness and abundance of pollinators in intensively used agricultural areas cannot be increased. Furthermore, these measures might represent ecological traps. To check this criticism, we surveyed one to three meter wide perennial wild flower strips in intensively used agricultural areas, which have been mulched annually for three years, upon abundance, species numbers and biomass of bees and butterflies. By means of transect surveys, species richness and abundance were recorded and biomass was calculated. We compared the findings with those of reference field margins. Our results show an increase in species richness and abundance as well as a general increase in biomass of wild bees and butterflies in wild flower strips compared to findings in the reference field margins. Implications for insect conservation Our study shows that small, annually mulched wild flower strips are able to promote biodiversity of wild bees and butterflies in the intensively used agricultural landscape. Further, our results obtained that this measure does not inevitably represent an ecological trap or sink habitat for most species.

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“…The species richness, diversity, distribution, and community structure of pollinators depend upon the local environment (Neumüller et al, 2020 ; Williams et al, 2010 ). Availability of flower resources, humidity, and temperature need to be taken into account especially while comparing the pollinators among habitats (Neumüller et al, 2020 ). The activity of pollinators is strongly correlated with air temperature, plant species richness (Hudewenz et al, 2012 ), and humidity (Pellissier et al, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have evaluated how environmental factors influence pollinator composition. However, the effects of many environmental factors on pollinator composition can be very different among climate/vegetation zones (Neumüller et al, 2020 ; Senapathi et al, 2017 ). Shivapuri‐Nagarjun National Park (SNNP) lies in the southern foot of the Himalayas, a mountainous area with a complex landscape.…”

Section: Introductionmentioning

confidence: 99%

Community structure of pollinating insects and its driving factors in different habitats of Shivapuri‐Nagarjun National Park, Nepal

Dyola

Baniya

Acharya

et al. 2022

Ecology and Evolution

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Insect pollinators are important means for a stable ecosystem. The habitat types play a crucial role in the community composition, abundance, diversity, and species richness of the pollinators. The present study in Shivapuri‐Nagarjun National Park explored the species richness and abundances of insect pollinators in four different habitats and different environmental variables in determining the community composition of the pollinators. Data were collected from 1,500 m to 2,700 m using color pan traps and hand sweeping methods. Non‐Metric Multidimensional Scaling (NMDS) and Redundancy Analysis (RDA) were conducted to show the association between insect pollinators and environmental variables. The results firmly demonstrated that species richness and abundances were higher (158) in Open trail compared to other habitats. The distribution of the pollinator species was more uniform in the Open trail followed by the Grassland. Similarly, a strong positive correlation between flower resources and pollinators' abundance (R 2 = .63, P < .001) was found. In conclusion, the Open trail harbors rich insect pollinators in lower elevation. The community structure of the pollinators was strongly influenced by the presence of flowers in the trails.

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Interactions of local habitat type, landscape composition and flower availability moderate wild bee communities

Cited by 26 publications

References 76 publications

Floral traits are associated with the quality but not quantity of heterospecific stigmatic pollen loads

Floral traits are associated with the quality but not quantity of heterospecific stigmatic pollen loads

Between perfect habitat and ecological trap: even wildflower strips mulched annually increase pollinating insect numbers in intensively used agricultural landscapes

Community structure of pollinating insects and its driving factors in different habitats of Shivapuri‐Nagarjun National Park, Nepal

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