Biogeography and designatable units of Bombus occidentalis Greene and B. terricola Kirby (Hymenoptera: Apidae) with implications for conservation status assessments

Sheffield, Cory S.; Richardson, Leif L.; Cannings, Syd; Ngo, Hien T.; Heron, Jennifer; Williams, Paul H.

doi:10.1007/s10841-016-9853-2

Cited by 18 publications

(20 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, Sheffield et al. ), though the stable B. ternarius is also on the edge of its southern range. However, data that would allow for explicit testing of the range edge specialization hypothesis are lacking, both in Europe and in North America.…”

Section: Discussionmentioning

confidence: 99%

“…In Michigan, the declining B. auricomus, B. borealis, B. pensylvanicus, and B. terricola are all on the edge of their climatic ranges (Husband et al 1980, Sheffield et al 2016, though the stable B. ternarius is also on the edge of its southern range. However, data that would allow for explicit testing of the range edge specialization hypothesis are lacking, both in Europe and in North America.…”

Section: Dietary Breadth-cause Of or Effect Of Susceptibility To Declmentioning

confidence: 99%

See 1 more Smart Citation

Narrow pollen diets are associated with declining Midwestern bumble bee species

Wood

Gibbs

Graham

et al. 2019

Ecology

110

View full text Add to dashboard Cite

Many species of bumble bee (Bombus) have declined in range and abundance across Europe, the Americas, and Asia, whereas other species have persisted and remain common and widespread. One explanation as to why some species have declined, based primarily on studies of the European bumble bee fauna, is that declining species have relatively narrow pollen‐foraging niches and are less able to use alternative host plants in the absence of their preferred hosts. Though extensively explored in Europe, this hypothesis has not been investigated in North America, in part due to incomplete information on the foraging niche of many species. We selected 12 bumble bee species found in Michigan and quantified their pollen diets using museum specimens. We also extensively resurveyed the state to understand their contemporary status and distribution. Compared to a pre‐2000 baseline, six species remain relatively common and widespread, whereas six species show range contractions of over 50%. There was a significant relationship between dietary breadth and distributional range change, with declined or declining species collecting around one‐third fewer pollen types than stable species. Though there were significant compositional differences, we found no differences in the number of pollen types collected by species with differing tongue lengths. Overall, these results support the hypothesis that species with narrower dietary niches are at greater risk of decline. However, it is not clear if narrow dietary niches are a cause of declines, or if both are driven by an underlying factor such as proximity to the edge of climatic niches. Further research is needed to improve our understanding of dietary niche in bumble bees, and how it interacts with other factors to influence population trajectories of stable and at‐risk species.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Dietary Breadth-cause Of or Effect Of Susceptibility To Declmentioning

confidence: 99%

Narrow pollen diets are associated with declining Midwestern bumble bee species

Wood

Gibbs

Graham

et al. 2019

Ecology

110

View full text Add to dashboard Cite

show abstract

“…), although not all pollinators are in decline (e.g., Sheffield et al. ). Crop pollination has significant economic value as bees are responsible for pollinating two‐thirds of the world's crops (Williams et al.…”

Section: Introductionmentioning

confidence: 99%

“…Pollination is an economically valuable ecosystem service, but increasing evidence suggests pollinators that sustain ecosystem stability and agricultural production are declining (Kearns et al 1998, Grixti et al 2009, although not all pollinators are in decline (e.g., Sheffield et al 2016). Crop pollination has significant economic value as bees are responsible for pollinating two-thirds of the world's crops (Williams et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Plant–pollinator networks in grassland working landscapes reveal seasonal shifts in network structure and composition

et al. 2019

View full text Add to dashboard Cite

Declines in native bee populations can limit pollination services that support native plant communities and global food production. Mitigating the impacts on pollinators and ecosystems requires conservation actions that promote biodiversity and remain practical for producers. We investigated plantpollinator interaction networks in working grassland landscapes, managed for cattle production and biodiversity, to advance conservation of pollinators in grazed systems. We compared and plotted interactions at the network level. We then used a regression framework to evaluate the influence of floristic availability on pollinator abundance in our system. Overall, we detected seasonal shifts at the network level, with increased specialization between flowers and bees occurring at the end of the sampling season. Furthermore, the response to floristic resources differed between honey bees (Apis mellifera) and native bees. While honey bee abundance increased with exotic floral abundance, native bee abundance showed no relationship with floral abundance and instead was positively associated with floral richness in our system. These findings could be an indication of seasonal shifts in bee activity and interactions with plants or a response to the subset of available resources in grazed systems. These interpretations, along with the detected difference in resource use between honey bees and native bees, suggest foraging preferences differ between these two groups and could influence conservation and management strategies. Furthermore, it demonstrates a need to consider how management practices could influence bee communities differentially across the growing season and suggests conservation actions should promote native floristic resources to benefit native bees.

show abstract

“…However, despite the molecular evidence and synonymy of Williams et al (2014), Dolan et al (2017) still recognised both species in Montana. In another series of studies with bumble bees, Williams et al (2012) and Sheffield et al (2016) used geographic patterns of COI to recognise two subspecies of B. occidentalis, the latter study also including an analysis of geography-based colour variation to help define the distribution of each designatable unit, and assist in the Committee On the Status of Endangered Wildlife In Canada conservation assessment for each (Committee on the Status of Endangered Wildlife in Canada 2014).…”

Section: Morphological Variationmentioning

confidence: 99%

Contribution of DNA barcoding to the study of the bees (Hymenoptera: Apoidea) of Canada: progress to date

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract-Bees (Hymenoptera: Apoidea, Apiformes) are taxonomically and ecologically diverse, with a wide range of social complexity, nesting preferences, floral associations, and biogeographic restrictions. A Canadian bee checklist, greatly assisted by the gene-assisted approach of DNA barcoding, is nearing completion. Previous evaluation of bee diversity in Canada, assisted by DNA barcoding, was restricted to Nova Scotia, which contains about 25% of the bee species in the country. Here, we summarise efforts to date to build a comprehensive DNA barcode library supporting bee taxonomic studies in Canada, consisting of more than 12 500 barcode-compliant sequences yielding 811 distinct barcode index numbers (BINs). This appears to represent~95% of the 856 bee species presently recorded from Canada, but comparison with known morphological species in each genus shows that some genera are still under-sampled or may contain cryptic taxa, with much taxonomic work still to be done on bees in Canada. This is particularly true within the taxonomically difficult genera Andrena Fabricius (Andrenidae), Hylaeus Fabricius (Colletidae), Melissodes Latreille (Apidae), Nomada Scopoli (Apidae), Osmia Panzer (Megachilidae), and Sphecodes Latreille (Halictidae). DNA analysis will likely be a key asset in resolving bee taxonomic issues in Canada in the future, and to date has even assisted studies of well-known bee taxa. Here we present summaries of our results, and discuss the use of DNA barcoding to assist future taxonomic work, faunal lists, and ecological studies.

show abstract

Biogeography and designatable units of Bombus occidentalis Greene and B. terricola Kirby (Hymenoptera: Apidae) with implications for conservation status assessments

Cited by 18 publications

References 57 publications

Narrow pollen diets are associated with declining Midwestern bumble bee species

Narrow pollen diets are associated with declining Midwestern bumble bee species

Plant–pollinator networks in grassland working landscapes reveal seasonal shifts in network structure and composition

Contribution of DNA barcoding to the study of the bees (Hymenoptera: Apoidea) of Canada: progress to date

Contact Info

Product

Resources

About