Decline of bumble bees (Bombus) in the North American Midwest

  title={Decline of bumble bees (Bombus) in the North American Midwest},
  author={Jennifer C. Grixti and Lisa T. Wong and Sydney Anne Cameron and Colin Favret},
  journal={Biological Conservation},

Figures and Tables from this paper

Assessing declines of North American bumble bees (Bombus spp.) using museum specimens
Half of the selected bumble bee species occurring in the eastern nearctic biogeographic region is in varying levels of decline, with the remaining species exhibiting stable or increasing trends, and suggestions for prioritizing conservation efforts are given.
Bumble bee species distributions and habitat associations in the Midwestern USA, a region of declining diversity
Bumble bees (Bombus spp.) are important pollinators, yet rapidly declining globally. In North America some species are thriving while others are nearing extinction. Recognizing subtle differences in
Patterns of widespread decline in North American bumble bees
It is shown that the relative abundances of four species have declined by up to 96% and that their surveyed geographic ranges have contracted by 23–87%, some within the last 20 y, although cause and effect remain uncertain.
Bumble bee (Bombus) distribution and diversity in Vermont, USA: a century of change
Bumble bees (Bombus) play key roles as pollinators in temperate ecosystems. Some North American species have declined due to factors that include habitat loss, parasites, pesticides, and climate
The bumble bees (Hymenoptera: Apidae: Bombus ) of Arkansas, fifty years later
Using county-level records as a point of comparison to look for changes in state-wide occurrence among species over time, it is found that state-level changes reflect national trends.
Bumble Bees (Hymenoptera: Apidae) of Oklahoma: Past and Present Biodiversity
The results parallel several recent studies that failed to locate extant populations of the variable cuckoo bee, Bombus variabilis (Cresson), supporting possible extirpation in portions of its North American range.
The Persistence of Bumble Bees (Hymenoptera: Apidae) in Northeastern Texas
This study performs field surveys of bumble bees in northeastern Texas and compares those data to historical specimen records to evaluate the current status of historically present species and establish current bumble bee persistence in northeast Texas.
Evidence for the decline of the western bumble bee (Bombus occidentalis Greene) in British Columbia
A comparison of the relative abundance of B. occidentalis, the Western Bumblebee after 20 years in the Fraser Valley of British Columbia, Canada indicates that differences noted in B. Occidentalis abundance are not the result oflower sampling effort during the more recent time period.


Evidence for decline in eastern North American bumblebees (Hymenoptera: Apidae), with special focus on Bombus affinis Cresson
An impoverishment of the bumblebee community in southern Ontario over the past 35 years is documents and the extent of range decline for a focal species was estimated by surveying 43 sites throughout its known native range in eastern Canada and the United States.
Causes of rarity in bumblebees
Decline and conservation of bumble bees.
Suggested measures include tight regulation of commercial bumble bee use and targeted use of environmentally comparable schemes to enhance floristic diversity in agricultural landscapes to prevent further declines.
The Distribution and Decline of British Bumble Bees (Bombus Latr.)
Large reductions in the distributional ranges recorded after 1960 were found for two of the biogeographic elements (especially for the Southern Local Species), which have resulted in the emergence of a new Central Impoverished Region covering 23 vice-counties in Central England.
A comprehensive phylogeny of the bumble bees (Bombus)
Using DNA sequence data, this work reports the first nearly complete species phylogeny of bumble bees, including most of the 250 known species from the 38 currently recognized subgenera, and provides a firm foundation for reclassification and for evaluating character evolution in the bumble Bees.
Assessing the Threatened Status of Bumble Bee Species (Hymenoptera: Apidae) in Hungary, Central Europe
The endangerment of the Hungarian bumble bee (Bombus Latr.) species is estimated using the available occurrence data from the last 50 years of the 20th century and indicates that 10 of the 21 native species showed a declining trend, while only three species increased in frequency of occurrence.
Habitat use by bumble bees (Bombus spp.)
Analysis of surveys of bumble bee distribution among 2 km grid‐squares in Kent revealed that some species are nearly ubiquitous among localities and abundant within each, and it follows from the marginal mosaic model that it is the species closest to their distribution limits that are most likely to face local extinction.
A retrospective analysis of pollen host plant use by stable and declining bumble bee species.
This study shows that natural history collections can play an important role in improving the understanding of the ecological mechanisms driving species population change by studying species' characteristics on specimens collected before the onset of their decline and preserved in natural history museums.