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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Koch, Jonathan B. Griswold, Terry L. Strange, James P. Cordes, Nils Solter, Leellen F. Cameron, Sydney A. Lozier, Jeffrey D. |
| Spatial Coverage | North America |
| Description | Author Affiliation: Cameron SA ( Department of Entomology and Institute for Genomic Biology, University of Illinois, Urbana, IL 61801, USA. scameron@life.illinois.edu); |
| Abstract | Bumble bees (Bombus) are vitally important pollinators of wild plants and agricultural crops worldwide. Fragmentary observations, however, have suggested population declines in several North American species. Despite rising concern over these observations in the United States, highlighted in a recent National Academy of Sciences report, a national assessment of the geographic scope and possible causal factors of bumble bee decline is lacking. Here, we report results of a 3-y interdisciplinary study of changing distributions, population genetic structure, and levels of pathogen infection in bumble bee populations across the United States. We compare current and historical distributions of eight species, compiling a database of >73,000 museum records for comparison with data from intensive nationwide surveys of >16,000 specimens. We show 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. We also show that declining populations have significantly higher infection levels of the microsporidian pathogen Nosema bombi and lower genetic diversity compared with co-occurring populations of the stable (nondeclining) species. Higher pathogen prevalence and reduced genetic diversity are, thus, realistic predictors of these alarming patterns of decline in North America, although cause and effect remain uncertain. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 108 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2011-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Microbiology Physiology Nosema Metabolism Algorithms Animals Genetic Variation Genotype Geography Host-Parasite Interactions Microsatellite Repeats Microscopy, Phase-Contrast Models, Genetic Molecular Sequence Data North America Pollination Population Dynamics Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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