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Phan NT, Joshi NK, Rajotte EG, Zhu F, Peter KA, López-Uribe MM, Biddinger DJ. Systemic pesticides in a solitary bee pollen food store affect larval development and increase pupal mortality. Sci Total Environ 2024; 915:170048. [PMID: 38218472 DOI: 10.1016/j.scitotenv.2024.170048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 01/06/2024] [Accepted: 01/07/2024] [Indexed: 01/15/2024]
Abstract
Solitary bees are often exposed to various pesticides applied for pest control on farmland while providing pollination services to food crops. Increasing evidence suggests that sublethal toxicity of agricultural pesticides affects solitary bees differently than the social bees used to determine regulatory thresholds, such as honey bees and bumblebees. Studies on solitary bees are challenging because of the difficulties in obtaining large numbers of eggs or young larvae for bioassays. Here we show the toxic and sublethal developmental effects of four widely used plant systemic pesticides on the Japanese orchard bee (Osmia cornifrons). Pollen food stores of this solitary bee were treated with different concentrations of three insecticides (acetamiprid, flonicamid, and sulfoxaflor) and a fungicide (dodine). Eggs were transplanted to the treated pollen and larvae were allowed to feed on the pollen stores after egg hatch. The effects of chronic ingestion of contaminated pollen were measured until adult eclosion. This year-long study revealed that chronic exposure to all tested pesticides delayed larval development and lowered larval and adult body weights. Additionally, exposure to the systemic fungicide resulted in abnormal larval defecation and increased mortality at the pupal stage, indicating potential risk to bees from fungicide exposure. These findings demonstrate potential threats to solitary bees from systemic insecticides and fungicides and will help in making policy decisions to mitigate these effects.
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Affiliation(s)
- Ngoc T Phan
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, USA; Research Center for Tropical Bees and Beekeeping, Vietnam National University of Agriculture, Hanoi, Vietnam.
| | - Neelendra K Joshi
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, USA.
| | - Edwin G Rajotte
- Department of Entomology, Pennsylvania State University, University Park, PA, USA
| | - Fang Zhu
- Department of Entomology, Pennsylvania State University, University Park, PA, USA
| | - Kari A Peter
- Penn State Fruit Research and Extension Center, Biglerville, PA, USA
| | | | - David J Biddinger
- Department of Entomology, Pennsylvania State University, University Park, PA, USA; Penn State Fruit Research and Extension Center, Biglerville, PA, USA
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2
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Gutierrez GM, LeCroy KA, Roulston TH, Biddinger DJ, López-Uribe MM. Osmia taurus (Hymenoptera: Megachilidae): A Non-native Bee Species With Invasiveness Potential in North America. Environ Entomol 2023; 52:149-156. [PMID: 36806615 DOI: 10.1093/ee/nvad005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Indexed: 06/18/2023]
Abstract
Bees are important pollinators and are essential for the reproduction of many plants in natural and agricultural ecosystems. However, bees can have adverse ecological effects when introduced to areas outside of their native geographic ranges. Dozens of non-native bee species are currently found in North America and have raised concerns about their potential role in the decline of native bee populations. Osmia taurus Smith (Hymenoptera: Megachilidae) is a mason bee native to eastern Asia that was first reported in the United States in 2002. Since then, this species has rapidly expanded throughout the eastern part of North America. Here, we present a comprehensive review of the natural history of O. taurus, document its recent history of spread through the United States and Canada, and discuss the evidence suggesting its potential for invasiveness. In addition, we compare the biology and history of colonization of O. taurus to O. cornifrons (Radoszkowski), another non-native mason bee species now widespread in North America. We highlight gaps of knowledge and future research directions to better characterize the role of O. taurus in the decline of native Osmia spp. Panzer and the facilitation of invasive plant-pollinator mutualisms.
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Affiliation(s)
- Grace M Gutierrez
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Kathryn A LeCroy
- Department of Entomology, Cornell University, Ithaca, NY, 2126, USA
| | - T'ai H Roulston
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, 22903, USA
| | - David J Biddinger
- Penn State Fruit Research and Extension Center, Biglerville, PA, 17207, USA
| | - Margarita M López-Uribe
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA
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3
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Underwood RM, Lawrence BL, Turley NE, Cambron-Kopco LD, Kietzman PM, Traver BE, López-Uribe MM. A longitudinal experiment demonstrates that honey bee colonies managed organically are as healthy and productive as those managed conventionally. Sci Rep 2023; 13:6072. [PMID: 37055462 PMCID: PMC10100614 DOI: 10.1038/s41598-023-32824-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 04/03/2023] [Indexed: 04/15/2023] Open
Abstract
Honey bee colony management is critical to mitigating the negative effects of biotic and abiotic stressors. However, there is significant variation in the practices implemented by beekeepers, which results in varying management systems. This longitudinal study incorporated a systems approach to experimentally test the role of three representative beekeeping management systems (conventional, organic, and chemical-free) on the health and productivity of stationary honey-producing colonies over 3 years. We found that the survival rates for colonies in the conventional and organic management systems were equivalent, but around 2.8 times greater than the survival under chemical-free management. Honey production was also similar, with 102% and 119% more honey produced in conventional and organic management systems, respectively, than in the chemical-free management system. We also report significant differences in biomarkers of health including pathogen levels (DWV, IAPV, Vairimorpha apis, Vairimorpha ceranae) and gene expression (def-1, hym, nkd, vg). Our results experimentally demonstrate that beekeeping management practices are key drivers of survival and productivity of managed honey bee colonies. More importantly, we found that the organic management system-which uses organic-approved chemicals for mite control-supports healthy and productive colonies, and can be incorporated as a sustainable approach for stationary honey-producing beekeeping operations.
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Affiliation(s)
- Robyn M Underwood
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA.
| | - Brooke L Lawrence
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA
| | - Nash E Turley
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA
| | | | - Parry M Kietzman
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Brenna E Traver
- Department of Biology, Penn State Schuylkill, Schuylkill Haven, PA, USA
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4
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Pope NS, Singh A, Childers AK, Kapheim KM, Evans JD, López-Uribe MM. The expansion of agriculture has shaped the recent evolutionary history of a specialized squash pollinator. Proc Natl Acad Sci U S A 2023; 120:e2208116120. [PMID: 37011184 PMCID: PMC10104555 DOI: 10.1073/pnas.2208116120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
The expansion of agriculture is responsible for the mass conversion of biologically diverse natural environments into managed agroecosystems dominated by a handful of genetically homogeneous crop species. Agricultural ecosystems typically have very different abiotic and ecological conditions from those they replaced and create potential niches for those species that are able to exploit the abundant resources offered by crop plants. While there are well-studied examples of crop pests that have adapted into novel agricultural niches, the impact of agricultural intensification on the evolution of crop mutualists such as pollinators is poorly understood. We combined genealogical inference from genomic data with archaeological records to demonstrate that the Holocene demographic history of a wild specialist pollinator of Cucurbita (pumpkins, squashes, and gourds) has been profoundly impacted by the history of agricultural expansion in North America. Populations of the squash bee Eucera pruinosa experienced rapid growth in areas where agriculture intensified within the past 1,000 y, suggesting that the cultivation of Cucurbita in North America has increased the amount of floral resources available to these bees. In addition, we found that roughly 20% of this bee species' genome shows signatures of recent selective sweeps. These signatures are overwhelmingly concentrated in populations from eastern North America where squash bees were historically able to colonize novel environments due to human cultivation of Cucurbita pepo and now exclusively inhabit agricultural niches. These results suggest that the widespread cultivation of crops can prompt adaptation in wild pollinators through the distinct ecological conditions imposed by agricultural environments.
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Affiliation(s)
- Nathaniel S Pope
- Department of Entomology, The Pennsylvania State University, University Park, PA 16802
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403
| | - Avehi Singh
- Department of Entomology, The Pennsylvania State University, University Park, PA 16802
| | - Anna K Childers
- Bee Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705
| | - Karen M Kapheim
- Department of Biology, Utah State University, Logan, UT 84322
| | - Jay D Evans
- Bee Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705
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5
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Hines HM, Kilpatrick SK, Mikó I, Snellings D, López-Uribe MM, Tian L. The diversity, evolution, and development of setal morphologies in bumble bees (Hymenoptera: Apidae: Bombus spp.). PeerJ 2022; 10:e14555. [PMID: 36573237 PMCID: PMC9789693 DOI: 10.7717/peerj.14555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/21/2022] [Indexed: 12/24/2022] Open
Abstract
Bumble bees are characterized by their thick setal pile that imparts aposematic color patterns often used for species-level identification. Like all bees, the single-celled setae of bumble bees are branched, an innovation thought important for pollen collection. To date no studies have quantified the types of setal morphologies and their distribution on these bees, information that can facilitate understanding of their adaptive ecological function. This study defines several major setal morphotypes in the common eastern bumble bee Bombus impatiens Cresson, revealing these setal types differ by location across the body. The positions of these types of setae are similar across individuals, castes, and sexes within species. We analyzed the distribution of the two most common setal types (plumose and spinulate) across the body dorsum of half of the described bumble bee species. This revealed consistently high density of plumose (long-branched) setae across bumble bees on the head and mesosoma, but considerable variation in the amount of metasomal plumosity. Variation on the metasoma shows strong phylogenetic signal at subgeneric and smaller group levels, making it a useful trait for species delimitation research, and plumosity has increased from early Bombus ancestors. The distribution of these setal types suggests these setae may serve several functions, including pollen-collecting and thermoregulatory roles, and probable mechanosensory functions. This study further examines how and when setae of the pile develop, evidence for mechanosensory function, and the timing of pigmentation as a foundation for future genetic and developmental research in these bees.
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Affiliation(s)
- Heather M. Hines
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States,Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States
| | - Shelby Kerrin Kilpatrick
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States,Department of Entomology, Texas A & M University, College Station, Texas, United States
| | - István Mikó
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States,Department of Biological Sciences, University of New Hampshire, Durham, New Hampshire, United States
| | - Daniel Snellings
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States,Division of Genetics & Genomics, Boston Children’s Hospital, Boston, Massachusetts, United States
| | - Margarita M. López-Uribe
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States
| | - Li Tian
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States,Department of Entomology, China Agricultural University, Beijing, China
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6
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Jones LJ, Singh A, Schilder RJ, López-Uribe MM. Squash bees host high diversity and prevalence of parasites in the northeastern United States. J Invertebr Pathol 2022; 195:107848. [PMID: 36343669 DOI: 10.1016/j.jip.2022.107848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/17/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
Abstract
The squash bee Eucera (Peponapis) pruinosa is emerging as a model species to study how stressors impact solitary wild bees in North America. Here, we describe the prevalence of trypanosomes, microsporidians and mollicute bacteria in E. pruinosa and two other species, Bombus impatiens and Apis mellifera, that together comprise over 97% of the pollinator visitors of Cucurbita agroecosystems in Pennsylvania (United States). Our results indicate that all three parasite groups are commonly detected in these bee species, but E. pruinosa often exhibit higher prevalences. We further describe novel trypanosome parasites detected in E. pruinosa, however it is unknown how these parasites impact these bees. We suggest future work investigates parasite replication and infection outcomes.
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Affiliation(s)
- Laura J Jones
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Avehi Singh
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA
| | - Rudolf J Schilder
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA; Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Margarita M López-Uribe
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA.
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7
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Jones LJ, Ford RP, Schilder RJ, López-Uribe MM. Honey bee viruses are highly prevalent but at low intensities in wild pollinators of cucurbit agroecosystems. J Invertebr Pathol 2021; 185:107667. [PMID: 34560106 DOI: 10.1016/j.jip.2021.107667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 08/29/2021] [Accepted: 09/14/2021] [Indexed: 12/26/2022]
Abstract
Managed and wild bee populations are in decline around the globe due to several biotic and abiotic stressors. Pathogenic viruses associated with the Western honey bee (Apis mellifera) have been identified as key contributors to losses of managed honey bee colonies, and are known to be transmitted to wild bee populations through shared floral resources. However, little is known about the prevalence and intensity of these viruses in wild bee populations, or how bee visitation to flowers impacts viral transmission in agroecosystems. This study surveyed honey bee, bumble bee (Bombus impatiens) and wild squash bee (Eucera (Peponapis) pruinosa) populations in Cucurbita agroecosystems across Pennsylvania (USA) for the prevalence and intensity of five honey bee viruses: acute bee paralysis virus (ABPV), deformed wing virus (DWV), Israeli acute paralysis virus (IAPV), Kashmir bee virus (KBV), and slow bee paralysis virus (SBPV). We investigated the potential role of bee visitation rate to flowers on DWV intensity among species in the pollinator community, with the expectation that increased bee visitation to flowers would increase the opportunity for transmission events between host species. We found that honey bee viruses are highly prevalent but in lower titers in wild E. pruinosa and B. impatiens than in A. mellifera populations throughout Pennsylvania (USA). DWV was detected in 88% of B. impatiens, 48% of E. pruinosa, and 95% of A. mellifera. IAPV was detected in 5% of B. impatiens and 4% of E. pruinosa, compared to 9% in A. mellifera. KBV was detected in 1% of B. impatiens and 5% of E. pruinosa, compared to 32% in A. mellifera. Our results indicate that DWV titers are not correlated with bee visitation in Cucurbita fields. The potential fitness impacts of these low viral titers detected in E. pruinosa remain to be investigated.
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Affiliation(s)
- Laura J Jones
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Ryan P Ford
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA; Department of Plant Science, The Pennsylvania State University, University Park, PA 16802, USA
| | - Rudolf J Schilder
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA; Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Margarita M López-Uribe
- Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, University Park, PA 16802, USA; Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA, 16802, USA.
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8
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Miranda EA, Lima IDN, Oi CA, López-Uribe MM, Del Lama MA, Freitas BM, Silva CI. Overlap of Ecological Niche Breadth of Euglossa cordata and Eulaema nigrita (Hymenoptera, Apidae, Euglossini) Accessed by Pollen Loads and Species Distribution Modeling. Neotrop Entomol 2021; 50:197-207. [PMID: 33683559 DOI: 10.1007/s13744-020-00847-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Urban areas can serve as biodiversity refuges for pollinators because of the high diversity of available floral and nesting resources. However, it remains unclear what plant species commonly used for urban landscaping provide floral resources that pollinators actively use. Here, we integrate data from the pollen and species distribution models of two abundant euglossine bees-the large-bodied Eulaema nigrita (Lepeletier, 1841) and the small-bodied Euglossa cordata (Linnaeus, 1758)-in urban areas to investigate their overlap in diet breadth and distribution. We hypothesized that because bees with larger body sizes tend to have larger foraging areas, large-bodied bees would have a wider diet breath than small-bodied bees. Contrary to our hypothesis, we found that Eg. cordata has a wider diet breadth than El. nigrita with the former species showing higher diversity of pollen types collected (per pollen load and on average across pollen loads). Pollen grains from Solanum paniculatum and Tradescantia zebrina represented 63% of the diet of Eg. cordata, whereas pollen from S. paniculatum and Psidium guajava represented 87% of the diet of El. nigrita. After overlaying the distribution of both bee species and the three most important pollen resources, the distribution models revealed that these three plant species can co-occur with both euglossine bees throughout a large portion of eastern Brazil near the coast. Thus, we conclude S. paniculatum, T. zebrina, and P. guajava should be considered key plants for the maintenance of these two urban euglossine bee species. The results of this study provide important information for urban landscaping programs that aim to protect and preserve pollinators.
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Affiliation(s)
- Elder Assis Miranda
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil.
- Núcleo de Pesquisa da Conservação e Biodiversidade do Semiárido - CONBIOS, Observatório UniFG do Semiárido Nordestino, Centro Universitário UNIFG, Guanambi, Bahia, Brazil.
| | | | - Cíntia A Oi
- Department of Biology, University of Leuven, KU Leuven, Leuven, Belgium
| | - Margarita M López-Uribe
- Department of Entomology, Center for Pollinator Research, University Park, Pennsylvania, PA, USA
| | - Marco Antonio Del Lama
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, Brazil
| | - Breno Magalhães Freitas
- Setor de Abelhas, Departamento de Zootecnia, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Cláudia Inês Silva
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
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9
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Hinshaw C, Evans KC, Rosa C, López-Uribe MM. The Role of Pathogen Dynamics and Immune Gene Expression in the Survival of Feral Honey Bees. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2020.594263] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Studies of the ecoimmunology of feral organisms can provide valuable insight into how host–pathogen dynamics change as organisms transition from human-managed conditions back into the wild. Honey bees (Apis mellifera Linnaeus) offer an ideal system to investigate these questions as colonies of these social insects often escape management and establish in the wild. While managed honey bee colonies have low probability of survival in the absence of disease treatments, feral colonies commonly survive in the wild, where pathogen pressures are expected to be higher due to the absence of disease treatments. Here, we investigate the role of pathogen infections [Deformed wing virus (DWV), Black queen cell virus (BQCV), and Nosema ceranae] and immune gene expression (defensin-1, hymenoptaecin, pgrp-lc, pgrp-s2, argonaute-2, vago) in the survival of feral and managed honey bee colonies. We surveyed a total of 25 pairs of feral and managed colonies over a 2-year period (2017–2018), recorded overwintering survival, and measured pathogen levels and immune gene expression using quantitative polymerase chain reaction (qPCR). Our results showed that feral colonies had higher levels of DWV but it was variable over time compared to managed colonies. Higher pathogen levels were associated with increased immune gene expression, with feral colonies showing higher expression in five out of the six examined immune genes for at least one sampling period. Further analysis revealed that differential expression of the genes hymenoptaecin and vago increased the odds of overwintering survival in managed and feral colonies. Our results revealed that feral colonies express immune genes at higher levels in response to high pathogen burdens, providing evidence for the role of feralization in altering pathogen landscapes and host immune responses.
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10
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Vaudo AD, Biddinger DJ, Sickel W, Keller A, López-Uribe MM. Correction to 'Introduced bees ( Osmia cornifrons) collect pollen from both coevolved and novel host-plant species within their family-level phylogenetic preferences'. R Soc Open Sci 2020; 7:201375. [PMID: 32968543 PMCID: PMC7481713 DOI: 10.1098/rsos.201375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
[This corrects the article DOI: 10.1098/rsos.200225.].
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11
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Vaudo AD, Biddinger DJ, Sickel W, Keller A, López-Uribe MM. Introduced bees ( Osmia cornifrons) collect pollen from both coevolved and novel host-plant species within their family-level phylogenetic preferences. R Soc Open Sci 2020; 7:200225. [PMID: 32874623 PMCID: PMC7428236 DOI: 10.1098/rsos.200225] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Studying the pollen preferences of introduced bees allows us to investigate how species use host-plants when establishing in new environments. Osmia cornifrons is a solitary bee introduced into North America from East Asia for pollination of Rosaceae crops such as apples and cherries. We investigated whether O. cornifrons (i) more frequently collected pollen from host-plant species they coevolved with from their geographic origin, or (ii) prefer host-plant species of specific plant taxa independent of origin. To address this question, using pollen metabarcoding, we examined the identity and relative abundance of pollen in larval provisions from nests located in different landscapes with varying abundance of East-Asian and non-Asian plant species. Our results show that O. cornifrons collected more pollen from plant species from their native range. Plants in the family Rosaceae were their most preferred pollen hosts, but they differentially collected species native to East Asia, Europe, or North America depending on the landscape. Our results suggest that while O. cornifrons frequently collect pollen of East-Asian origin, the collection of pollen from novel species within their phylogenetic familial affinities is common and can facilitate pollinator establishment. This phylogenetic preference highlights the effectiveness of O. cornifrons as crop pollinators of a variety of Rosaceae crops from different geographic origins. Our results imply that globalization of non-native plant species may ease the naturalization of their coevolved pollinators outside of their native range.
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Affiliation(s)
- Anthony D. Vaudo
- Department of Biology, University of Nevada Reno, Reno, NV 89557, USA
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA
| | - David J. Biddinger
- Fruit Research and Extension Center, The Pennsylvania State University, Biglerville, PA 17307, USA
| | - Wiebke Sickel
- Thünen Institute of Biodiversity, Johann Heinrich von Thünen Institute, Braunschweig 38116, Germany
- Department of Animal Ecology and Tropical Biology, University of Würzburg, Würzburg 97074, Germany
| | - Alexander Keller
- Department of Bioinformatics, University of Würzburg, Center for Computational and Theoretical Biology, Würzburg 97074, Germany
| | - Margarita M. López-Uribe
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA
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12
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Phan NT, Joshi NK, Rajotte EG, López-Uribe MM, Zhu F, Biddinger DJ. A new ingestion bioassay protocol for assessing pesticide toxicity to the adult Japanese orchard bee (Osmia cornifrons). Sci Rep 2020; 10:9517. [PMID: 32528143 PMCID: PMC7289847 DOI: 10.1038/s41598-020-66118-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 05/15/2020] [Indexed: 12/12/2022] Open
Abstract
Adopting an Integrated Pest and Pollinator Management strategy requires an evaluation of pesticide risk for pollinator species. For non-Apid species, however, the standardized ingestion assays are difficult to implement. This hinders the consideration of non-Apid species in farm management strategies and government regulatory processes. We describe a new method for a mason bee, Osmia cornifrons, which is an important pollinator of apples and other fruit crops. Our approach overcomes high control mortality seen in other bioassay protocols and expands testing to include males as well as females. The new pesticide toxicity assessment protocol showed that (1) a group feeding method is optimum even though there is no trophallaxis, (2) males had better tolerance to pesticides although they are smaller, and (3) pesticides can cause additional mortality after the standard 48 h assessment time specified by European Food Safety Authority and U.S. Environmental Protection Agency.
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Affiliation(s)
- Ngoc T Phan
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA. .,Research Center for Tropical Bees and Beekeeping, Vietnam National University of Agriculture, Hanoi, Vietnam.
| | - Neelendra K Joshi
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, USA
| | - Edwin G Rajotte
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA
| | | | - Fang Zhu
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA
| | - David J Biddinger
- Department of Entomology, The Pennsylvania State University, University Park, PA, USA. .,Penn State Fruit Research and Extension Center, Biglerville, PA, USA.
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13
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Brashear AM, Roobsoong W, Siddiqui FA, Nguitragool W, Sattabongkot J, López-Uribe MM, Miao J, Cui L. A glance of the blood stage transcriptome of a Southeast Asian Plasmodium ovale isolate. PLoS Negl Trop Dis 2019; 13:e0007850. [PMID: 31730621 PMCID: PMC6881071 DOI: 10.1371/journal.pntd.0007850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 11/27/2019] [Accepted: 10/16/2019] [Indexed: 11/24/2022] Open
Abstract
Plasmodium ovale accounts for a disproportionate number of travel-related malaria cases. This parasite is understudied since there is a reliance on clinical samples. We collected a P. ovale curtisi parasite isolate from a clinical case in western Thailand and performed RNA-seq analysis on the blood stage transcriptomes. Using both de novo assembly and alignment-based methods, we detected the transcripts for 6628 out of 7280 annotated genes. For those lacking evidence of expression, the vast majority belonged to the PIR and STP1 gene families. We identified new splicing patterns for over 2500 genes, and mapped at least one untranslated region for over half of all annotated genes. Our analysis also detected a notable presence of anti-sense transcripts for over 10% of P. ovale curtisi genes. This transcriptomic analysis provides new insights into the blood-stage biology of this neglected parasite. Ovale malaria can be caused by one of two Plasmodium parasites, P. ovale curtisi and P. ovale wallikeri. P. ovale parasites are especially adept at evading prophylactic antimalarial drugs and traveling internationally, which makes them interesting from a global health perspective. Due to the lack of a continuous culture system for these parasites, research on P. ovale parasites has lagged behind and relies on clinical samples. Recent genome sequencing of a few P. ovale clinical isolates provides the blueprint of the parasite genome and in silico prediction of parasite genes. However, confirmation of the annotated genes and proof of their expression are needed. Here we obtained a P. ovale curtisi clinical isolate from western Thailand and performed RNA-seq analysis on the blood-stage parasites. High-quality RNA-seq data has enabled us to identify transcripts for 6628 of the 7280 annotated genes. Consistent with the blood stage development, housekeeping genes such as those involved in translation and metabolism are highly expressed. Prediction of the UTRs as well as detection of anti-sense transcripts and potential splicing patterns suggests the presence of complex gene regulation mechanisms for this parasite. This transcriptome dataset will serve as a useful resource for future studies of P. ovale.
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Affiliation(s)
- Awtum M Brashear
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America.,Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Wanlapa Roobsoong
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Faiza A Siddiqui
- Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Thailand
| | - Margarita M López-Uribe
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America
| | - Jun Miao
- Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, Department of Entomology, University Park, Pennsylvania, United States of America.,Department of Internal Medicine, University of South Florida, Tampa, Florida, United States of America
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14
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López-Uribe MM, Ricigliano VA, Simone-Finstrom M. Defining Pollinator Health: A Holistic Approach Based on Ecological, Genetic, and Physiological Factors. Annu Rev Anim Biosci 2019; 8:269-294. [PMID: 31618045 DOI: 10.1146/annurev-animal-020518-115045] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Evidence for global bee population declines has catalyzed a rapidly evolving area of research that aims to identify the causal factors and to effectively assess the status of pollinator populations. The term pollinator health emerged through efforts to understand causes of bee decline and colony losses, but it lacks a formal definition. In this review, we propose a definition for pollinator health and synthesize the available literature on the application of standardized biomarkers to assess health at the individual, colony, and population levels. We focus on biomarkers in honey bees, a model species, but extrapolate the potential application of these approaches to monitor the health status of wild bee populations. Biomarker-guided health measures can inform beekeeper management decisions, wild bee conservation efforts, and environmental policies. We conclude by addressing challenges to pollinator health from a One Health perspective that emphasizes the interplay between environmental quality and human, animal, and bee health.
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Affiliation(s)
- Margarita M López-Uribe
- Department of Entomology, Center for Pollinator Research, Pennsylvania State University, University Park, Pennsylvania 16802, USA;
| | - Vincent A Ricigliano
- Honey Bee Breeding, Genetics and Physiology Research, USDA-ARS, Baton Rouge, Louisiana 70820, USA; ,
| | - Michael Simone-Finstrom
- Honey Bee Breeding, Genetics and Physiology Research, USDA-ARS, Baton Rouge, Louisiana 70820, USA; ,
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15
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Affiliation(s)
- DeAnna E. Beasley
- Department of Biology, Geology, and Environmental Science, University of Tennessee at Chattanooga, Chattanooga, TN 37403
| | | | - Alison Fowler
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695
| | - Kirsten Keleher
- 3North Carolina School of Science and Mathematics, Durham, NC
| | - Margarita M. López-Uribe
- Department of Entomology, Center for Pollinator Research, Penn State University, State College, PA 16802
| | - Robert R. Dunn
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695
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16
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López-Uribe MM, Jha S, Soro A. A trait-based approach to predict population genetic structure in bees. Mol Ecol 2019; 28:1919-1929. [PMID: 30667117 DOI: 10.1111/mec.15028] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/11/2019] [Indexed: 02/06/2023]
Abstract
Understanding population genetic structure is key to developing predictions about species susceptibility to environmental change, such as habitat fragmentation and climate change. It has been theorized that life-history traits may constrain some species in their dispersal and lead to greater signatures of population genetic structure. In this study, we use a quantitative comparative approach to assess if patterns of population genetic structure in bees are driven by three key species-level life-history traits: body size, sociality, and diet breadth. Specifically, we reviewed the current literature on bee population genetic structure, as measured by the differentiation indices Nei's GST, Hedrick's G'ST , and Jost's D. We then used phylogenetic generalised linear models to estimate the correlation between the evolution of these traits and patterns of genetic differentiation. Our analyses revealed a negative and significant effect of body size on genetic structure, regardless of differentiation index utilized. For Hedrick's G'ST and Jost's D, we also found a significant impact of sociality, where social species exhibited lower levels of differentiation than solitary species. We did not find an effect of diet specialization on population genetic structure. Overall, our results suggest that physical dispersal or other functions related to body size are among the most critical for mediating population structure for bees. We further highlight the importance of standardizing population genetic measures to more easily compare studies and to identify the most susceptible species to landscape and climatic changes.
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Affiliation(s)
- Margarita M López-Uribe
- Department of Entomology, Center for Pollinator Research, Pennsylvania State University, University Park, Pennsylvania
| | - Shalene Jha
- Deparment of Integrative Biology, The University of Texas at Austin, Austin, Texas
| | - Antonella Soro
- Institute for Biology, Martin-Luther University, Halle (Saale), Germany
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17
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López-Uribe MM, Simone-Finstrom M. Special Issue: Honey Bee Research in the US: Current State and Solutions to Beekeeping Problems. Insects 2019; 10:E22. [PMID: 30634401 PMCID: PMC6358869 DOI: 10.3390/insects10010022] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 01/02/2019] [Indexed: 12/29/2022]
Abstract
The European honey bee (Apis mellifera) is the most important managed species for agricultural pollination across the world [...].
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Affiliation(s)
- Margarita M López-Uribe
- Department of Entomology, Center for Pollinator Research, Pennsylvania State University, University Park, PA 16802, USA.
| | - Michael Simone-Finstrom
- USDA Agricultural Research Service, Honey Bee Breeding, Genetics and Physiology Research, Baton Rouge, LA 70820, USA.
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18
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Underwood RM, Traver BE, López-Uribe MM. Beekeeping Management Practices Are Associated with Operation Size and Beekeepers' Philosophy towards in-Hive Chemicals. Insects 2019; 10:insects10010010. [PMID: 30626023 PMCID: PMC6359672 DOI: 10.3390/insects10010010] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/27/2018] [Accepted: 12/21/2018] [Indexed: 11/16/2022]
Abstract
Management by beekeepers is of utmost importance for the health and survival of honey bee colonies. Beekeeping management practices vary from low to high intervention regarding the use of chemicals, hive manipulations, and supplemental feeding of colonies. In this study, we use quantitative data from the Bee Informed Partnership's national survey to investigate drivers of management practices among beekeepers in the United States. This is the first study to quantitatively examine these variables to objectively describe the management practices among different groups of beekeepers in the United States. We hypothesized that management practices and goals among beekeepers are different based on the beekeeper's philosophy (as determined by their willingness to use chemicals to control pests and pathogens) and the size of the beekeeping operation. Using a multiple factor analysis, we determined that beekeepers use a continuum of management practices. However, we found that beekeepers' willingness to use in-hive chemicals and the number of colonies in their operation are non-randomly associated with other aspects of beekeeping management practices. Specifically, the size of the beekeeping operation was associated with beekeepers' choices of in-hive chemicals, while beekeepers' philosophy was most strongly associated with choices of in-hive chemicals and beekeeping goals. Our results will facilitate the development of decision-making tools for beekeepers to choose management practices that are appropriate for the size of their operations and their beekeeping philosophy.
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Affiliation(s)
- Robyn M Underwood
- Department of Entomology, Pennsylvania State University, 501 ASI Building, University Park, PA 16802, USA.
| | - Brenna E Traver
- Department of Biology, Penn State Schuylkill, 200 University Drive, Schuylkill Haven, PA 17972, USA.
| | - Margarita M López-Uribe
- Department of Entomology, Pennsylvania State University, Center for Pollinator Research, University Park, PA 16802, USA.
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19
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Ryan SF, Adamson NL, Aktipis A, Andersen LK, Austin R, Barnes L, Beasley MR, Bedell KD, Briggs S, Chapman B, Cooper CB, Corn JO, Creamer NG, Delborne JA, Domenico P, Driscoll E, Goodwin J, Hjarding A, Hulbert JM, Isard S, Just MG, Kar Gupta K, López-Uribe MM, O'Sullivan J, Landis EA, Madden AA, McKenney EA, Nichols LM, Reading BJ, Russell S, Sengupta N, Shapiro LR, Shell LK, Sheard JK, Shoemaker DD, Sorger DM, Starling C, Thakur S, Vatsavai RR, Weinstein M, Winfrey P, Dunn RR. The role of citizen science in addressing grand challenges in food and agriculture research. Proc Biol Sci 2018; 285:20181977. [PMID: 30464064 PMCID: PMC6253361 DOI: 10.1098/rspb.2018.1977] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 10/30/2018] [Indexed: 11/12/2022] Open
Abstract
The power of citizen science to contribute to both science and society is gaining increased recognition, particularly in physics and biology. Although there is a long history of public engagement in agriculture and food science, the term 'citizen science' has rarely been applied to these efforts. Similarly, in the emerging field of citizen science, most new citizen science projects do not focus on food or agriculture. Here, we convened thought leaders from a broad range of fields related to citizen science, agriculture, and food science to highlight key opportunities for bridging these overlapping yet disconnected communities/fields and identify ways to leverage their respective strengths. Specifically, we show that (i) citizen science projects are addressing many grand challenges facing our food systems, as outlined by the United States National Institute of Food and Agriculture, as well as broader Sustainable Development Goals set by the United Nations Development Programme, (ii) there exist emerging opportunities and unique challenges for citizen science in agriculture/food research, and (iii) the greatest opportunities for the development of citizen science projects in agriculture and food science will be gained by using the existing infrastructure and tools of Extension programmes and through the engagement of urban communities. Further, we argue there is no better time to foster greater collaboration between these fields given the trend of shrinking Extension programmes, the increasing need to apply innovative solutions to address rising demands on agricultural systems, and the exponential growth of the field of citizen science.
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Affiliation(s)
- S F Ryan
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
| | - N L Adamson
- Xerces Society for Invertebrate Conservation/USDA NRCS ENTSC, Greensboro, NC, USA
| | - A Aktipis
- Department of Psychology, Arizona State University, Tempe, AZ, USA
| | - L K Andersen
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
| | - R Austin
- Department of Crop and Soil Sciences, NC State Extension, Raleigh, NC, USA
| | - L Barnes
- Lincoln Heights Environmental Connections Magnet Elementary School, Fuquay-Varina, NC, USA
| | - M R Beasley
- Knightdale High School of Collaborative Design, Knightdale, NC, USA
| | - K D Bedell
- School of Education, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - S Briggs
- NC Plant Sciences Initiative, College of Agriculture and Life Sciences, NC State Extension, Raleigh, NC, USA
| | - B Chapman
- Department of Agricultural and Human Sciences, NC State Extension, Raleigh, NC, USA
| | - C B Cooper
- Department of Forestry and Environmental Resources, NC State Extension, Raleigh, NC, USA
| | - J O Corn
- William and Ida Friday Institute for Educational Innovation, NC State Extension, Raleigh, NC, USA
| | - N G Creamer
- Department of Horticultural Science, NC State Extension, Raleigh, NC, USA
| | - J A Delborne
- Department of Forestry and Environmental Resources, NC State Extension, Raleigh, NC, USA
| | - P Domenico
- Curriculum Enhancement Programs at Wake County Public School System, Cary, NC, USA
| | - E Driscoll
- Department of Horticultural Science, NC State Extension, Raleigh, NC, USA
| | - J Goodwin
- Department of Communication, NC State Extension, Raleigh, NC, USA
| | - A Hjarding
- North Carolina Wildlife Federation, Charlotte, NC, USA
- The University of North Carolina at Charlotte, Charlotte, NC, USA
| | - J M Hulbert
- Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - S Isard
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, State College, PA, USA
- Department of Meteorology and Atmospheric Sciences, Pennsylvania State University, State College, PA, USA
| | - M G Just
- Department of Entomology and Plant Pathology, NC State Extension, Raleigh, NC, USA
| | - K Kar Gupta
- Biodiversity Lab, North Carolina Museum of Natural Sciences, Raleigh, NC, USA
| | - M M López-Uribe
- Department of Entomology, Center for Pollinator Research, Pennsylvania State University, State College, PA, USA
| | - J O'Sullivan
- Center for Environmental Farming Systems, North Carolina A&T State University, Greensboro, NC, USA
| | - E A Landis
- Department of Biology, Tufts University, Medford, MA, USA
| | - A A Madden
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
| | - E A McKenney
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
- Research and Collections, North Carolina Museum of Natural Sciences, Raleigh, NC, USA
| | - L M Nichols
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
| | - B J Reading
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
| | - S Russell
- Millbrook Environmental Connections Magnet Elementary School, Raleigh, NC, USA
| | - N Sengupta
- Consultant - Biodiversity Conservation & Sustainable Development, Auroville, Tamil Nadu, India
| | - L R Shapiro
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
| | - L K Shell
- Research and Collections, North Carolina Museum of Natural Sciences, Raleigh, NC, USA
| | - J K Sheard
- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Copenhagen University, Copenhagen, Denmark
| | - D D Shoemaker
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA
| | - D M Sorger
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
- Research and Collections, North Carolina Museum of Natural Sciences, Raleigh, NC, USA
| | - C Starling
- Heritage High School, Wake Forest, NC, USA
| | - S Thakur
- College of Veterinary Medicine, NC State Extension, Raleigh, NC, USA
| | - R R Vatsavai
- Department of Computer Science, NC State Extension, Raleigh, NC, USA
| | - M Weinstein
- Evaluation and Accountability Coordinator Extension Administration, NC State Extension, Raleigh, NC, USA
| | - P Winfrey
- Arizona State University Biodesign Institute, Tempe, AZ, USA
| | - R R Dunn
- Department of Applied Ecology, NC State Extension, Raleigh, NC, USA
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20
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Penick CA, Halawani O, Pearson B, Mathews S, López-Uribe MM, Dunn RR, Smith AA. External immunity in ant societies: sociality and colony size do not predict investment in antimicrobials. R Soc Open Sci 2018; 5:171332. [PMID: 29515850 PMCID: PMC5830739 DOI: 10.1098/rsos.171332] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 01/04/2018] [Indexed: 06/10/2023]
Abstract
Social insects live in dense groups with a high probability of disease transmission and have therefore faced strong pressures to develop defences against pathogens. For this reason, social insects have been hypothesized to invest in antimicrobial secretions as a mechanism of external immunity to prevent the spread of disease. However, empirical studies linking the evolution of sociality with increased investment in antimicrobials have been relatively few. Here we quantify the strength of antimicrobial secretions among 20 ant species that cover a broad spectrum of ant diversity and colony sizes. We extracted external compounds from ant workers to test whether they inhibited the growth of the bacterium Staphylococcus epidermidis. Because all ant species are highly social, we predicted that all species would exhibit some antimicrobial activity and that species that form the largest colonies would exhibit the strongest antimicrobial response. Our comparative approach revealed that strong surface antimicrobials are common to particular ant clades, but 40% of species exhibited no antimicrobial activity at all. We also found no correlation between antimicrobial activity and colony size. Rather than relying on antimicrobial secretions as external immunity to control pathogen spread, many ant species have probably developed alternative strategies to defend against disease pressure.
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Affiliation(s)
- Clint A. Penick
- The Biomimicry Center, Arizona State University, Tempe, AZ 85287, USA
| | - Omar Halawani
- Research & Collections, North Carolina Museum of Natural Sciences, Raleigh, NC 27601, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Bria Pearson
- Research & Collections, North Carolina Museum of Natural Sciences, Raleigh, NC 27601, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Stephanie Mathews
- Biological Sciences, Campbell University, Buies Creek, NC 27506, USA
| | - Margarita M. López-Uribe
- Department of Entomology, Center for Pollinator Research, Pennsylvania State University, University Park, PA 16802, USA
| | - Robert R. Dunn
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA
- Center for Macroecology, Evolution and Climate, University of Copenhagen, Copenhagen, 2100Denmark
| | - Adrian A. Smith
- Research & Collections, North Carolina Museum of Natural Sciences, Raleigh, NC 27601, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
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21
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López-Uribe MM, Cane JH, Minckley RL, Danforth BN. Crop domestication facilitated rapid geographical expansion of a specialist pollinator, the squash bee Peponapis pruinosa. Proc Biol Sci 2017; 283:rspb.2016.0443. [PMID: 27335417 DOI: 10.1098/rspb.2016.0443] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 05/24/2016] [Indexed: 11/12/2022] Open
Abstract
Squash was first domesticated in Mexico and is now found throughout North America (NA) along with Peponapis pruinosa, a pollen specialist bee species of the squash genus Cucurbita The origin and spread of squash cultivation is well-studied archaeologically and phylogenetically; however, no study has documented how cultivation of this or any other crop has influenced species in mutualistic interactions. We used molecular markers to reconstruct the demographic range expansion and colonization routes of P. pruinosa from its native range into temperate NA. Populations east of the Rocky Mountains expanded from the wild host plant's range in Mexico and were established by a series of founder events. Eastern North America was most likely colonized from squash bee populations in the present-day continental Midwest USA and not from routes that followed the Gulf and Atlantic coasts from Mexico. Populations of P. pruinosa west of the Rockies spread north from the warm deserts much more recently, showing two genetically differentiated populations with no admixture: one in California and the other one in eastern Great Basin. These bees have repeatedly endured severe bottlenecks as they colonized NA, following human spread of their Cucurbita pollen hosts during the Holocene.
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Affiliation(s)
- Margarita M López-Uribe
- Department of Entomology, Cornell University, Ithaca, NY 14850, USA Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA
| | - James H Cane
- USDA-ARS Bee Biology and Systematics Laboratory, Utah State University, Logan, UT 84322, USA
| | - Robert L Minckley
- Department of Biology, University of Rochester, Rochester, NY 14627, USA
| | - Bryan N Danforth
- Department of Entomology, Cornell University, Ithaca, NY 14850, USA
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22
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Abstract
Changes in community composition are an important, but hard to predict, effect of climate change. Here, we use a wild-bee study system to test the ability of critical thermal maxima (CTmax, a measure of heat tolerance) to predict community responses to urban heat-island effects in Raleigh, NC, USA. Among 15 focal species, CTmax ranged from 44.6 to 51.3°C, and was strongly predictive of population responses to urban warming across 18 study sites (r2 = 0.44). Species with low CTmax declined the most. After phylogenetic correction, solitary species and cavity-nesting species (bumblebees) had the lowest CTmax, suggesting that these groups may be most sensitive to climate change. Community responses to urban and global warming will likely retain strong physiological signal, even after decades of warming during which time lags and interspecific interactions could modulate direct effects of temperature.
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Affiliation(s)
- April L Hamblin
- Department of Entomology and Plant Pathology, North Carolina State University, Campus Box 7613, Raleigh, NC 27695, USA
| | - Elsa Youngsteadt
- Department of Entomology and Plant Pathology, North Carolina State University, Campus Box 7613, Raleigh, NC 27695, USA
| | - Margarita M López-Uribe
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802, USA
| | - Steven D Frank
- Department of Entomology and Plant Pathology, North Carolina State University, Campus Box 7613, Raleigh, NC 27695, USA
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23
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Dorchin A, López-Uribe MM, Praz CJ, Griswold T, Danforth BN. Phylogeny, new generic-level classification, and historical biogeography of the Eucera complex (Hymenoptera: Apidae). Mol Phylogenet Evol 2017; 119:81-92. [PMID: 29122650 DOI: 10.1016/j.ympev.2017.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 07/30/2017] [Accepted: 10/06/2017] [Indexed: 10/18/2022]
Abstract
The longhorn bee tribe Eucerini (Hymenoptera: Apidae) is a diverse, widely distributed group of solitary bees that includes important pollinators of both wild and agricultural plants. About half of the species in the tribe are currently assigned to the genus Eucera and to a few other related genera. In this large genus complex, comprising ca. 390 species, the boundaries between genera remain ambiguous due to morphological intergradation among taxa. Using ca. 6700 aligned nucleotide sites from six gene fragments, 120 morphological characters, and more than 100 taxa, we present the first comprehensive molecular, morphological, and combined phylogenetic analyses of the 'Eucera complex'. The revised generic classification that we propose is congruent with our phylogeny and maximizes both generic stability and ease of identification. Under this new classification most generic names are synonymized under an expanded genus Eucera. Thus, Tetralonia, Peponapis, Xenoglossa, Cemolobus, and Syntrichalonia are reduced to subgeneric rank within Eucera, and Synhalonia is retained as a subgenus of Eucera. Xenoglossodes is reestablished as a valid subgenus of Eucera while Tetraloniella is synonymized with Tetralonia and Cubitalia with Eucera. In contrast, we suggest that the venusta-group of species, currently placed in the subgenus Synhalonia, should be recognized as a new genus. Our results demonstrate the need to evaluate convergent loss or gain of important diagnostic traits to minimize the use of potentially homoplasious characters when establishing classifications. Lastly, we show that the Eucera complex originated in the Nearctic region in the late Oligocene, and dispersed twice into the Old World. The first dispersal event likely occurred 24.2-16.6 mya at a base of a clade of summer-active bees restricted to warm region of the Old World, and the second 13.9-12.3 mya at the base of a clade of spring-active bees found in cooler regions of the Holarctic. Our results further highlight the role of Beringia as a climate-regulated corridor for bees.
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Affiliation(s)
- A Dorchin
- Department of Entomology, Cornell University, Ithaca, NY 14853, USA; USDA-ARS, Pollinating Insects Research Unit, Utah State University, Logan, UT 84322, USA.
| | - M M López-Uribe
- Department of Entomology, Pennsylvania State University, Center for Pollinator Research, University Park, PA 16802, USA
| | - C J Praz
- Institute of Biology, University of Neuchatel, Emile-Argand 11, 2000 Neuchatel, Switzerland
| | - T Griswold
- USDA-ARS, Pollinating Insects Research Unit, Utah State University, Logan, UT 84322, USA
| | - B N Danforth
- Department of Entomology, Cornell University, Ithaca, NY 14853, USA
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López-Uribe MM, Fitzgerald A, Simone-Finstrom M. Inducible versus constitutive social immunity: examining effects of colony infection on glucose oxidase and defensin-1 production in honeybees. R Soc Open Sci 2017; 4:170224. [PMID: 28573033 PMCID: PMC5451834 DOI: 10.1098/rsos.170224] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 05/04/2017] [Indexed: 05/26/2023]
Abstract
Honeybees use a variety of defence mechanisms to reduce disease infection and spread throughout the colony. Many of these defences rely on the collective action of multiple individuals to prevent, reduce or eradicate pathogens-often referred to as 'social immunity'. Glucose oxidase (GOX) and some antimicrobial peptides (e.g. defensin-1 or Def1) are secreted by the hypopharyngeal gland of adult bees on larval food for their antiseptic properties. Because workers secrete these compounds to protect larvae, they have been used as 'biomarkers' for social immunity. The aim of this study was to investigate if GOX and Def1 are induced after pathogen exposure to determine whether its production by workers is the result of a collective effort to protect the brood and colony in response to a pathogen challenge. Specifically, we quantified GOX and Def1 in honeybee adults before and after colony-level bacterial infection by American foulbrood ((AFB), Paenibacillus larvae). Overall, our results indicate that levels of GOX and Def1 are not induced in response to pathogenic infections. We therefore conclude that GOX and Def1 are highly constitutive and co-opted as mechanisms of social immunity, and these factors should be considered when investigating immunity at the individual and colony level in social insects.
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Affiliation(s)
- Margarita M. López-Uribe
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
| | - Andrea Fitzgerald
- Department of Public Health, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Michael Simone-Finstrom
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
- Honey Bee Breeding, Genetics and Physiology Research Laboratory, USDA-ARS, Baton Rouge, LA 70820, USA
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Abstract
Social living poses challenges for individual fitness because of the increased risk of disease transmission among conspecifics. Despite this challenge, sociality is an evolutionarily successful lifestyle, occurring in the most abundant and diverse group of organisms on earth--the social insects. Two contrasting hypotheses predict the evolutionary consequences of sociality on immune systems. The social group hypothesis posits that sociality leads to stronger individual immune systems because of the higher risk of disease transmission in social species. By contrast, the relaxed selection hypothesis proposes that social species have evolved behavioural immune defences that lower disease risk within the group, resulting in lower immunity at the individual level. We tested these hypotheses by measuring the encapsulation response in 11 eusocial and non-eusocial insect lineages. We built phylogenetic mixed linear models to investigate the effect of behaviour, colony size and body size on cellular immune response. We found a significantly negative effect of colony size on encapsulation response (Markov chain Monte Carlo generalized linear mixed model (mcmcGLMM) p < 0.05; phylogenetic generalized least squares (PGLS) p < 0.05). Our findings suggest that insects living in large societies may rely more on behavioural mechanisms, such as hygienic behaviours, than on immune function to reduce the risk of disease transmission among nest-mates.
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Affiliation(s)
- Margarita M López-Uribe
- Department of Entomology, North Carolina State University Department of Applied Ecology, North Carolina State University W. M. Keck Center for Behavioral Biology, Natural History Museum of Denmark
| | | | - Steven D Frank
- Department of Entomology, North Carolina State University
| | - Robert R Dunn
- Department of Applied Ecology, North Carolina State University W. M. Keck Center for Behavioral Biology, Natural History Museum of Denmark Center for Macroecology and Evolution and Climate, Natural History Museum of Denmark
| | - David R Tarpy
- Department of Entomology, North Carolina State University W. M. Keck Center for Behavioral Biology, Natural History Museum of Denmark
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Kamvar ZN, López-Uribe MM, Coughlan S, Grünwald NJ, Lapp H, Manel S. Developing educational resources for population genetics in R: an open and collaborative approach. Mol Ecol Resour 2016; 17:120-128. [PMID: 27297607 DOI: 10.1111/1755-0998.12558] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
Abstract
The r computing and statistical language community has developed a myriad of resources for conducting population genetic analyses. However, resources for learning how to carry out population genetic analyses in r are scattered and often incomplete, which can make acquiring this skill unnecessarily difficult and time consuming. To address this gap, we developed an online community resource with guidance and working demonstrations for conducting population genetic analyses in r. The resource is freely available at http://popgen.nescent.org and includes material for both novices and advanced users of r for population genetics. To facilitate continued maintenance and growth of this resource, we developed a toolchain, process and conventions designed to (i) minimize financial and labour costs of upkeep; (ii) to provide a low barrier to contribution; and (iii) to ensure strong quality assurance. The toolchain includes automatic integration testing of every change and rebuilding of the website when new vignettes or edits are accepted. The process and conventions largely follow a common, distributed version control-based contribution workflow, which is used to provide and manage open peer review by designated website editors. The online resources include detailed documentation of this process, including video tutorials. We invite the community of population geneticists working in r to contribute to this resource, whether for a new use case of their own, or as one of the vignettes from the 'wish list' we maintain, or by improving existing vignettes.
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Affiliation(s)
- Zhian N Kamvar
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, USA
| | - Margarita M López-Uribe
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695, USA
| | - Simone Coughlan
- School of Mathematics, Statistics and Applied Mathematics, National University of Ireland Galway, Galway, Ireland
| | - Niklaus J Grünwald
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, USA.,Horticultural Crops Research Unit, USDA Agricultural Research Service, Corvallis, OR, 97330, USA
| | - Hilmar Lapp
- Center for Genomic and Computational Biology, Duke University, Durham, NC, 27708, USA
| | - Stéphanie Manel
- EPHE, PSL Research University, CNRS, UM, SupAgro, IRD, INRA, UMR 5175 CEFE, F-34293, Montpellier, France
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Youngsteadt E, Appler RH, López-Uribe MM, Tarpy DR, Frank SD. Urbanization Increases Pathogen Pressure on Feral and Managed Honey Bees. PLoS One 2015; 10:e0142031. [PMID: 26536606 PMCID: PMC4633120 DOI: 10.1371/journal.pone.0142031] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 10/17/2015] [Indexed: 12/11/2022] Open
Abstract
Given the role of infectious disease in global pollinator decline, there is a need to understand factors that shape pathogen susceptibility and transmission in bees. Here we ask how urbanization affects the immune response and pathogen load of feral and managed colonies of honey bees (Apis mellifera Linnaeus), the predominant economically important pollinator worldwide. Using quantitative real-time PCR, we measured expression of 4 immune genes and relative abundance of 10 honey bee pathogens. We also measured worker survival in a laboratory bioassay. We found that pathogen pressure on honey bees increased with urbanization and management, and the probability of worker survival declined 3-fold along our urbanization gradient. The effect of management on pathogens appears to be mediated by immunity, with feral bees expressing immune genes at nearly twice the levels of managed bees following an immune challenge. The effect of urbanization, however, was not linked with immunity; instead, urbanization may favor viability and transmission of some disease agents. Feral colonies, with lower disease burdens and stronger immune responses, may illuminate ways to improve honey bee management. The previously unexamined effects of urbanization on honey-bee disease are concerning, suggesting that urban areas may favor problematic diseases of pollinators.
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Affiliation(s)
- Elsa Youngsteadt
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
| | - R. Holden Appler
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Margarita M. López-Uribe
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
- W. M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, North Carolina, United States of America
| | - David R. Tarpy
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
- W. M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, North Carolina, United States of America
- * E-mail:
| | - Steven D. Frank
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
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López-Uribe MM, Morreale SJ, Santiago CK, Danforth BN. Nest suitability, fine-scale population structure and male-mediated dispersal of a solitary ground nesting bee in an urban landscape. PLoS One 2015; 10:e0125719. [PMID: 25950429 PMCID: PMC4423849 DOI: 10.1371/journal.pone.0125719] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 03/18/2015] [Indexed: 11/19/2022] Open
Abstract
Bees are the primary pollinators of flowering plants in almost all ecosystems. Worldwide declines in bee populations have raised awareness about the importance of their ecological role in maintaining ecosystem functioning. The naturally strong philopatric behavior that some bee species show can be detrimental to population viability through increased probability of inbreeding. Furthermore, bee populations found in human-altered landscapes, such as urban areas, can experience lower levels of gene flow and effective population sizes, increasing potential for inbreeding depression in wild bee populations. In this study, we investigated the fine-scale population structure of the solitary bee Colletes inaequalis in an urbanized landscape. First, we developed a predictive spatial model to detect suitable nesting habitat for this ground nesting bee and to inform our field search for nests. We genotyped 18 microsatellites in 548 female individuals collected from nest aggregations throughout the study area. Genetic relatedness estimates revealed that genetic similarity among individuals was slightly greater within nest aggregations than among randomly chosen individuals. However, genetic structure among nest aggregations was low (Nei's GST = 0.011). Reconstruction of parental genotypes revealed greater genetic relatedness among females than among males within nest aggregations, suggesting male-mediated dispersal as a potentially important mechanism of population connectivity and inbreeding avoidance. Size of nesting patch was positively correlated with effective population size, but not with other estimators of genetic diversity. We detected a positive trend between geographic distance and genetic differentiation between nest aggregations. Our landscape genetic models suggest that increased urbanization is likely associated with higher levels of inbreeding. Overall, these findings emphasize the importance of density and distribution of suitable nesting patches for enhancing bee population abundance and connectivity in human dominated habitats and highlights the critical contribution of landscape genetic studies for enhanced conservation and management of native pollinators.
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Affiliation(s)
| | - Stephen J. Morreale
- Department of Natural Resources, Cornell University, Ithaca, New York, 14853, United States of America
| | - Christine K. Santiago
- Department of Entomology, Cornell University, Ithaca, New York, 14853, United States of America
| | - Bryan N. Danforth
- Department of Entomology, Cornell University, Ithaca, New York, 14853, United States of America
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Ramírez SR, Hernández C, Link A, López-Uribe MM. Seasonal cycles, phylogenetic assembly, and functional diversity of orchid bee communities. Ecol Evol 2015; 5:1896-907. [PMID: 26140205 PMCID: PMC4485970 DOI: 10.1002/ece3.1466] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 02/07/2015] [Accepted: 02/19/2015] [Indexed: 11/16/2022] Open
Abstract
Neotropical rainforests sustain some of the most diverse terrestrial communities on Earth. Euglossine (or orchid) bees are a diverse lineage of insect pollinators distributed throughout the American tropics, where they provide pollination services to a staggering diversity of flowering plant taxa. Elucidating the seasonal patterns of phylogenetic assembly and functional trait diversity of bee communities can shed new light into the mechanisms that govern the assembly of bee pollinator communities and the potential effects of declining bee populations. Male euglossine bees collect, store, and accumulate odoriferous compounds (perfumes) to subsequently use during courtship display. Thus, synthetic chemical baits can be used to attract and monitor euglossine bee populations. We conducted monthly censuses of orchid bees in three sites in the Magdalena valley of Colombia – a region where Central and South American biotas converge – to investigate the structure, diversity, and assembly of euglossine bee communities through time in relation to seasonal climatic cycles. In particular, we tested the hypothesis that phylogenetic community structure and functional trait diversity changed in response to seasonal rainfall fluctuations. All communities exhibited strong to moderate phylogenetic clustering throughout the year, with few pronounced bursts of phylogenetic overdispersion that coincided with the transition from wet-to-dry seasons. Despite the heterogeneous distribution of functional traits (e.g., body size, body mass, and proboscis length) and the observed seasonal fluctuations in phylogenetic diversity, we found that functional trait diversity, evenness, and divergence remained constant during all seasons in all communities. However, similar to the pattern observed with phylogenetic diversity, functional trait richness fluctuated markedly with rainfall in all sites. These results emphasize the importance of considering seasonal fluctuations in community assembly and provide a glimpse to the potential effects that climatic alterations may have on both pollinator communities and the ecosystem services they provide.
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Affiliation(s)
- Santiago R Ramírez
- University of California Davis One Shields Ave, Davis, California, 95616
| | - Carlos Hernández
- Departamento de Ecología, Facultad de Estudios Ambientales y Rurales, Pontificia Universidad Javeriana Bogotá, Colombia
| | - Andres Link
- Departamento de Ciencias Biológicas, Universidad de Los Andes Bogotá, Colombia
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López-Uribe MM, Zamudio KR, Cardoso CF, Danforth BN. Climate, physiological tolerance and sex-biased dispersal shape genetic structure of Neotropical orchid bees. Mol Ecol 2014; 23:1874-90. [PMID: 24641728 DOI: 10.1111/mec.12689] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/20/2014] [Accepted: 02/03/2014] [Indexed: 11/26/2022]
Abstract
Understanding the impact of past climatic events on the demographic history of extant species is critical for predicting species' responses to future climate change. Palaeoclimatic instability is a major mechanism of lineage diversification in taxa with low dispersal and small geographical ranges in tropical ecosystems. However, the impact of these climatic events remains questionable for the diversification of species with high levels of gene flow and large geographical distributions. In this study, we investigate the impact of Pleistocene climate change on three Neotropical orchid bee species (Eulaema bombiformis, E. meriana and E. cingulata) with transcontinental distributions and different physiological tolerances. We first generated ecological niche models to identify species-specific climatically stable areas during Pleistocene climatic oscillations. Using a combination of mitochondrial and nuclear markers, we inferred calibrated phylogenies and estimated historical demographic parameters to reconstruct the phylogeographical history of each species. Our results indicate species with narrower physiological tolerance experienced less suitable habitat during glaciations and currently exhibit strong population structure in the mitochondrial genome. However, nuclear markers with low and high mutation rates show lack of association with geography. These results combined with lower migration rate estimates from the mitochondrial than the nuclear genome suggest male-biased dispersal. We conclude that despite large effective population sizes and capacity for long-distance dispersal, climatic instability is an important mechanism of maternal lineage diversification in orchid bees. Thus, these Neotropical pollinators are susceptible to disruption of genetic connectivity in the event of large-scale climatic changes.
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31
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Wikelski M, Moxley J, Eaton-Mordas A, López-Uribe MM, Holland R, Moskowitz D, Roubik DW, Kays R. Large-range movements of neotropical orchid bees observed via radio telemetry. PLoS One 2010; 5:e10738. [PMID: 20520813 PMCID: PMC2877081 DOI: 10.1371/journal.pone.0010738] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Accepted: 02/23/2010] [Indexed: 11/19/2022] Open
Abstract
Neotropical orchid bees (Euglossini) are often cited as classic examples of trapline-foragers with potentially extensive foraging ranges. If long-distance movements are habitual, rare plants in widely scattered locations may benefit from euglossine pollination services. Here we report the first successful use of micro radio telemetry to track the movement of an insect pollinator in a complex and forested environment. Our results indicate that individual male orchid bees (Exaerete frontalis) habitually use large rainforest areas (at least 42-115 ha) on a daily basis. Aerial telemetry located individuals up to 5 km away from their core areas, and bees were often stationary, for variable periods, between flights to successive localities. These data suggest a higher degree of site fidelity than what may be expected in a free living male bee, and has implications for our understanding of biological activity patterns and the evolution of forest pollinators.
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Affiliation(s)
- Martin Wikelski
- Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology, Radolfzell, Germany
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America
- Smithsonian Tropical Research Institute, Balboa, Republic of Panama
| | - Jerry Moxley
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America
| | - Alexander Eaton-Mordas
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America
| | | | - Richard Holland
- Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology, Radolfzell, Germany
| | - David Moskowitz
- EcolSciences, Inc., Rockaway, New Jersey, United States of America
| | - David W. Roubik
- Smithsonian Tropical Research Institute, Balboa, Republic of Panama
| | - Roland Kays
- Smithsonian Tropical Research Institute, Balboa, Republic of Panama
- New York State Museum, Albany, New York, United States of America
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López-Uribe MM, Del Lama MA. Molecular identification of species of the genus Euglossa Latreille (Hymenoptera: Apidae, Euglossini). Neotrop Entomol 2007; 36:712-720. [PMID: 18060297 DOI: 10.1590/s1519-566x2007000500012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2006] [Accepted: 05/03/2007] [Indexed: 05/25/2023]
Abstract
Euglossine bees interact with more than 60 plant families of the Neotropical region. The richness and abundance of these bees have been intensively studied in different ecosystems using the methodology of capturing males with chemical baits. Females are poorly known for most of the species and morphological characters for their taxonomic classification have not yet been described. The purpose of this study was to use allozymes and restriction patterns of the mitochondrial regions 16S and Cyt b to identify species of Euglossa Latreille. Bees were collected while visiting Thevetia peruviana (Apocynaceae) flowers in five cities of the state of São Paulo, Brazil. Three Euglossa species were identified among the 305 individuals collected. Euglossa cordata (L.) was the only species found in all cities, while E. securigera Dressler and E. townsendi Cockerell were restricted to two and one cities respectively. EST-3 was a diagnostic marker, whereas ICD, MDH, ME and PGM were informative for species identification when used in combination. Restriction by VspI of the amplified 16S fragment differentiated the three species and showed intraspecific polymorphism for E. cordata and E. securigera. The Cyt b region showed distinctive patterns for E. townsendi but it was not possible to differentiate the other two species. Our results describe potentially useful genetic markers for the identification of Euglossa spp. at the species and group level.
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Affiliation(s)
- Margarita M López-Uribe
- Lab. Genética Evolutiva de Himenópteros, Depto. Genética e Evolução, Univ. Federal de São Carlos, São Carlos, SP, 13565.905, Brazil
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