Trends in Ecology & Evolution, Journal Year: 2021, Volume and Issue: 36(7), P. 623 - 636

Published: April 15, 2021

Flower sharing amongst pollinator species represents a conduit for interspecific insect pathogen transmission.Plant–pollinator network structure and traits shape dynamics in the community.Global change (climate change, invasive species, agricultural intensification, urbanisation) can modulate interactions, host susceptibility, virulence, thereby creating novel epidemiological risks.Multiple global effects interact synergistic or antagonistic ways, additional risks complicating predictions of evolution.Flower-mediated transmission provides model framework to understand interplay under change. Multiple pressures, their interplay, cause plant–pollinator extinctions modify assemblages interactions. This may alter shifts, intra- spread, emergence population community epidemics. Flowers are hubs transmission. Consequently, interaction networks be pivotal shifts modulating disease dynamics. Traits plants, pollinators, pathogens also govern spread pathogens. Pathogen spillover–spillback between managed wild pollinators driving evolution virulence Understanding this host–pathogen will crucial predicting impacts on pollination underpinning ecosystems human wellbeing. Wild provide ecosystem services diverse economic noneconomic values that support health, production, wellbeing [1.Potts S.G. et al.Safeguarding well-being.Nature. 2016; 540: 220-229Crossref PubMed Scopus (558) Google Scholar]. Multiple, potentially interacting, anthropogenic pressures threaten drive declines Scholar,2.Vanbergen A.J. Insect Pollinators Initiative Threats an service: pollinators.Front. Ecol. Environ. 2013; 11: 251-259Crossref (644) Intra- (viruses, microsporidian fungi, bacteria, protozoa, parasitic invertebrates) communities assembled changes likely emerging threat Scholar,3.Brown M.J.F. al.A horizon scan future threats opportunities pollination.PeerJ. 4e2249Crossref Horizontal occurs when individual insects share flowers providing nectar pollen resources [4.Durrer S. Schmid-Hempel P. Shared use leads horizontal transmission.Proc. R. Soc. London B. 1994; 258: 299-302Crossref (206) Scholar,5.McArt S.H. al.Arranging bouquet disease: floral plant animal pathogens.Ecol. Lett. 2014; 17: 624-636Crossref (112) Scholar] as well during social interactions [6.Chen Y.P. al.Prevalence honeybee viruses.Appl. Microbiol. 2006; 72: 606-611Crossref (184) mating, latter leading vertical generations [7.Beaurepaire A. al.Diversity distribution viruses western honey bee, Apis mellifera.Insects. 2020; 239Crossref (17) Emerging zoonotic diseases due current growing [8.Woolhouse M.E.J. al.Emerging pathogens: epidemiology jumps.Trends Evol. 2005; 20: 238-244Abstract Full Text PDF (438) Although is more limited than intraspecific Hymenoptera [9.Yañez O. al.Bee viruses: routes infection Hymenoptera.Front. 943Crossref (6) Scholar], phylogenetic studies indicate frequent Why particular jump some but not others, remains only partly understood [10.Parrish C.R. al.Cross-species virus new epidemic diseases.Microbiol. Mol. Biol. Rev. 2008; 457-470Crossref (446) Scholar]; lack coevolution means these events elevate mortality, reduce fitness, [11.Vanbergen al.Risks from alien species.Nat. 2018; 2: 16-25Crossref (61) Multi-host systems infectivity [12.Letko M. al.Bat-borne diversity, spillover, emergence.Nat. 18: 461-471Crossref (38) so it critical how mechanisms impact including spillover bee species. Given importance vital such land [13.Figueroa L.L. al.Landscape simplification shapes prevalence networks.Ecol. 23: 1212-1222Crossref chemical stressors [14.Fine J.D. al.An inert pesticide adjuvant synergizes viral pathogenicity mortality larvae.Sci. Rep. 2017; 7: 40499Crossref (35) altered habitat [15.Graystock al.Dominant abundance parasite temporal communities.Nat. 4: 1358-1367Crossref (8) climate [16.Cornelissen al.Global warming promotes biological invasion pest.Glob. Chang. 2019; 25: 3642-3655Crossref (9) [17.Schweiger al.Multiple biotic interactions: affect pollination.Biol. 2010; 85: 777-795PubMed pollinator–pathogen Such raise risk by altering dominance, distribution, primary secondary asymptomatic vectors. populations, communities, functions (Figure 1). The landscape key concentrating diluting potential transfer. Pollinator obligate flower visitors, foraging feeding and/or at least part life cycle, therefore both compete time space makes hotspots co-occurrence, direct contact, indirect (mediated nectar) Scholar,15.Graystock Scholar,18.Graystock al.Parasites bloom: aid dispersal parasites within species.Proc. 2015; 28220151371Crossref (126) Accordingly, serve 'travel' through crossing boundaries infecting hosts [18.Graystock Studying tripartite plant–pollinator–pathogen help identify flower-mediated elucidate disruptions create determine susceptibility different environmental transmit [19.Williams N.M. al.Ecological life-history predict responses disturbances.Biol. Conserv. 143: 2280-2291Crossref (417) Species' diet breadth preference probability encountering nectar/pollen, infected hosts, deposited flowers. Relatively specialised forage few taxa have lower exposure with broader diets. Less function generalist networks, being highly connected multiple thus indirectly other generalists greater (novel otherwise) accordingly vector across network. Generalist however, differ preferences foragers select specific subsets which mitigate [20.Ellner S.P. al.Individual specialization multihost epidemics: networks.Am. Nat. 195: 118-131Crossref (2) Moreover, dilute per emergent spreading visits over Sociality trait affecting Eusocial (Apis, Bombus, Meliponini) play disproportionately large role history, cooperative brood care, overlapping densely populated colonies exacerbating intra-colony Along generalised diets long flying season bridging phenology eusocial bees contact spillover. However, increased burden immunity (e.g., behaviours combat removing diseased larvae dead workers colony [21.Meunier J. Social group living insects.Philos. Trans. B Sci. 37020140102Crossref (94) Scholar]). Elucidating gradients uptake deposition rates, transportation mode), sizes, plasticity facultative sociality Halictidae) among transmission, largely unexplored important direction eco-epidemiology. Plant risk, facilitation inhibition transfer [5.McArt Floral architecture, constraining access requisite morphological adaptations, filters visitor contacts Plants structurally simple, displays Apiaceae, Rosaceae) attract numerous facilitating [22.Truitt al.Trait-based modeling multi-host transmission: 193: 149-167Crossref (11) Additionally, plants central position often contain high load [23.Piot N. al.Network centrality indicator via flowers.Insects. 872Crossref (0) More complex structures requiring intimate sustained limit functional Alternatively, characteristics, organic volatiles produced mutualists, toxic certain [24.Hammerbacher al.Roles defence against microbial exploitation volatiles.Plant Cell 42: 2827-2843Crossref (56) Nectar rewards phytochemicals inhibit consumed reducing Crithidia sp. bumble [25.Giacomini J.J. al.Medicinal value sunflower pathogens.Sci. 8: 14394Crossref (32) Scholar]), loads spread. Combined resistance degradation temperature, UV-radiation), survival subsequent infections [26.Adler L.S. al.Disease where you dine: associated bees.Ecology. 99: 2535-2545Crossref (23) Scholar,27.Figueroa : , persistence, acquisition flowers.Proc. Lond. 28620190603PubMed physiology alternative has implications levels. Certain individuals immune vectors, whereas others suffer disease, physiological stress, behaviour, reduced fitness death [28.Manley al.Contrasting specialist bees.Mol. 29: 380-393Crossref (3) according nutritional status, influence stressors, context [29.Brown al.Strong context-dependent host-parasite system: reconciling genetic evidence theory.J. Anim. 2003; 994-1002Crossref (208) While research heavily biased towards bees, recent point ranges, bombi families [30.Ngor L. al.Cross-infectivity bee-associated three families.Parasitology. 147: 1290-1304Crossref strains behave specialists terms range, infectivity, ability cross Single-stranded RNA tend pose highest co-infecting mutation rate, short generation time, [31.McMahon D.P. sting spit: widespread cross-infection bees.J. 84: 615-624Crossref (129) Scholar, 32.Dobelmann al.Genetic strain diversity infect wide range associates shaped geographic origins.Viruses. 12: 358Crossref (1) 33.Dalmon al.Possible same resource.Insects. 2021; 122Crossref co-infections (RNA viruses, microsporidia, Acari) further For example, mellifera infested Varroa destructor mites show higher Deformed wing (DWV) [34.Wilfert al.Deformed honeybees driven mites.Science. 351: 594-597Crossref asymmetric intra-host competition inhibiting manifestation [35.Doublet V. al.Within-host Nosema ceranae disadvantage virus.J. Invertebr. Pathol. 124: 31-34Crossref Pathogens behaviour increase potential. trypanosomatid defecate frequently [27.Figueroa fungal scent lure [36.Cellini al.Pathogen-induced honeybee-mediated Erwinia amylovora.ISME 13: 847-859Crossref (18) spp.) forming cysts spores promote persistence susceptible [37.Evison S.E.F. Jensen A.B. biology bees.Curr. Opin. 26: 105-113Crossref Beyond pathogens, biota gut microbiota) interacting mutualistic, commensal, Lactobacilli inadvertently collected improve [38.McFrederick Q.S. al.Environment kin: whence do obtain acidophilic bacteria?.Mol. 2012; 21: 1754-1768Crossref (95) Arbuscular mycorrhizal fungi roots soil fertility chemistry alkaloids) ways [39.Davis J.K. al.From parasites: mycorrhizae nutrients pathogens.Ecology. 100e02801Crossref Interactions virus-vectoring non-vector herbivores mediated chemicals reduction flavonoids) [40.Su Q. herbivore increases vector-borne defences.Funct. 34: 1091-1101Crossref It unknown whether similar trophic might pollinators. Plant–pollinator describe [41.Nielsen Bascompte Ecological nestedness, sampling effort.J. 2007; 95: 1134-1141Crossref (148) Scholar,42.Thébault E. Fontaine C. Stability ecological architecture mutualistic networks.Science. 329: 853-856Crossref (826) pool landscape, metabolic dietary needs, phenological synchrony mutualisms dictate [43.Vázquez al.Uniting pattern process plant-animal networks: review.Ann. Bot. 2009; 103: 1445-1457Crossref (369) 1A). typically asymmetrical form (Box Specialist number single family) represent subset visited nested consist weakly interlinked modules comprise sets strongly [44.Olesen J.M. al.The modularity networks.Proc. Natl. Acad. U. 104: 19891-19896Crossref (957) arise convergent mutualist coevolution, caused example inter- flexible level visitation available [45.Spiesman B.J. Gratton Flexible topology networks.Ecology. 97: 1431-1441Crossref (19) Scholar].Box 1Key Network Metrics TransmissionPlant–pollinator displayed bipartite nodes connecting lines. Connectance, I) arguably most metrics throughout used unweighted (binary) indices exist characterise weighted (i.e., frequency), common accurate way display networks.Connectance proportion realised Hence, containing five ten connectance 0.20, since 50 theoretically possible.Modularity refers division separate modules, within-module connectance, modules. As express modularity. Newman's (Q), calculated fraction each module minus expected random [115.Newman Modularity 8577-8582Crossref (6380) Scholar].Nestedness described tendency resulting species' [116.Bascompte assembly plant–animal 100: 9383-9387Crossref (1355) There several nestedness indices, metric based overlap decreasing fill (NODF) considered robust [117.Almeida-Neto consistent analysis systems: concept measurement.Oikos. 117: 1227-1239Crossref (960) networks. Connectance possible. Nestedness Stochastic environmentally variation fundamental assembl

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